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Synthesis of high surface area mesoporous silica SBA-15 by adjusting hydrothermal treatment time and the amount of polyvinyl alcohol

  • Ridhawati Thahir EMAIL logo , Abdul Wahid Wahab , Nursiah La Nafie and Indah Raya
Published/Copyright: December 31, 2019
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Open Chemistry
From the journal Open Chemistry Volume 17 Issue 1

Abstract

The high surface area of mesoporous silica SBA-15 has been synthesized successfully by hydrothermal treatment with direct addition of PVA, triblock copolymer (P123) as a direct structure agent and tetraethyl orthosilicate (TEOS) as a precursor. The mesoporous silica SBA-15 have been characterized with nitrogen physisorption, scanning electron microscopy, Fourier transformed infrared spectroscopy, and x-ray diffraction. Measurement of nitrogen sorption indicated that with the addition of PVA, the surface area is increased but the pore volume and pore diameter is not significantly. The short time of hydrothermal treatment (20 h) and using x-ray diffraction, showed that the morphological structure of silica SBA-15 can be changed to a orthorhombic crystal system. The result of the FTIR and SEM-EDX characteristic indicated the functional groups and morphology of the SBA-15 with a narrow pore size distribution. The BET method has exhibited the largest surface area 1726 m2/g, pore volume 1.4 cm3/g, and pore diameter 3.2 nm. It can be suggested that the silica mesoporous SBA-15 will have potential application prospect in catalysis, storage, and adsorbent.

Keywords: mesoporous silica; SBA-15; surface area; hydrothermal treatment

1 Introduction

Porous materials are established as a solid have content of pores and the fraction of pore volume to the total volume 0.2-0.95 [1]. According to the IUPAC, porous materials have a classified base on pore size. They are macropores (pore diameter with more than 50 nm); mesopores (pore diameter between 2 nm and 50 nm) and micropores (pores with diameter no more than 2 nm) [2]. Santa Barbara Amorphous (SBA-15) is one of the typical mesoporous bases on silica that has well ordered hexagonal structure with uniform pore size up to 30 nm [3].

Previous studies have reported that mesoporous silica SBA-15 had advanced structure properties, such as high specific surface area to acquire many active sites in insufficient volume [4], uniformity of pore diameter to permit diffusion and adsorption of larger molecules [5, 6, 7, 8], thick pore wall and exceptionally hydrothermal stability [9], and specify structure is still a considerable role for future material scientist [10]. The excellent mesoporous materials of SBA-15 can be used in an amount of application such as catalysis [11, 12, 13], water treatment [14,15], sensor [16, 17, 18], and supporting cell for composite materials [12, 18, 19, 20]. The mesoporous materials, high surface area, and high thermal stability have widely used for more application in industry. In spite of properties of the SBA-15 in various application, it is still required to modify variable synthesis of SBA-15.

The changes experienced by the enhanced high surface area of SBA-15 had been studied by many researchers using the addition of PVA (polyvinyl alcohol). It was investigated that the surface area of SBA-15 is increased to 1248 m2/g while the structure and pore size stable [4]. This concept has recently been challenged by a decreased surface area of SBA-15, their studies explaining that added PVA during preparation can produce highly molecular sieve of SBA-15 with thick pore and high hydrothermal stability. The result of the specific surface area by the adjunct of PVA is 687 m2/g. The role of PVA serves as a mild template to

produce better structural properties [9]. Therefore, one of the most significant currents investigates the effect of the amount PVA to explore the significantly high surface area, hydrothermal stability, and morphology of silica SBA-15

The methodological approach taken in this study is a combination of the amount of PVA and time adjusting for hydrothermal treatment. One of the most significant current studies in control of the pore size and mesoporous structure of the material is modified process variable during the preparation of typesetting Pluronik as a surfactant template and interaction process between surfactant and precursor silica source. Part of the purpose of this study was to investigate the modification variable synthesis to affect the physical sorption properties and mesoporous structure of the final product. The product of silica SBA-15 was analyzed by nitrogen physisorption, scanning electron microscopy (SEM) with energy dispersive x-ray analysis (EDX), fourier transformed infrared spectroscopy (FTIR), and x-ray diffraction (XRD)

2 Materials and methods

2.1 Materials

The chemical reagent used to prepare the mesoporous silica SBA-15 were Pluronics (P123, PEO20PPO70PEO20, average Mn ~ 5800 Sigma-Aldrich, Singapore), tetraethyl orthosilicate (TEOS, 98% Sigma-Aldrich, Singapore), polyvinyl alcohol (PVA Sigma-Aldrich, Singapore), hydrochloric acid solution (HCl, 37% Merck), ammonium fluoride solution (NH4F), and heptane solution (C7H16) were received from J.T. Baker. All chemicals reagent which were analytical grade without further purification.

2.2 Synthesis mesoporous silica SBA-15

SBA-15 was synthesized according to the improved procedure by Liang Chao et.al [4,5,9]. The previous study has assessed the properties of SBA-15 without co-surfactant PVA in the preparation process of Pluronic surfactant template [21]. A case study approach was near modified to synthesize SBA-15. For the first, 2.4 g of Pluronic and 0.027 g of NH4F were mixed in 1.3 M HCl solution as much 84 ml, followed by stirring at ambient temperature until the solution was clear. Then, the water-bath set at a temperature 10oC to prepare the Pluronic surfactant template for 1 h. In other solution, various of the amount PVA (1 g for the SBA_1, SBA_2, and SBA_5; 2 g for SBA_2 and SBA_4) were dissolved in 10 ml H2O at 60oC and mixed into the Pluronic surfactant template. In particular, 3.7 ml of TEOS precursor solution and 1.2 ml heptane were attached to the beaker. The Pluronic surfactant template and TEOS precursor solution were stirred to allow the solution to mix well for one day at room temperature in an open container. After that, the solution was transferred to the closed-teflon container for hydrothermal treatment at temperature of 100oC) for certain time (20 h for SBA_1 and SBA_2; 24 h for SBA_3 and SBA_4; and 96 h for SBA_5), it was then cooled to room temperature. The white gel products were precipitated by centrifuge to get the right product and washed it with deionized water until pH 7 was clear. Finally, to remove partial washing water, the right products were dried at 60oC for 24 h and calcined in the furnace at 550oC for 5 h to perfect the step process.

Table 1

Summary of synthesis condition for SBA-15 samples.

SBA-15 samplesTime of hydrothermal treatment (h)Amount of PVA (g)
SBA_1201
SBA_2202
SBA_3241
SBA_4242
SBA_5961

2.3 Characterization

2.3.1 Physisorption analysis

Physisorption analysis of SBA-15 samples were quantified at -196oC by using a Quantachroma NovaWin version 11.0 device. The physisorption analysis was measured after the purge process under vacuum at 300oC for 3 h. The amount of nitrogen adsorbed at a relative pressure [p/po] = 0.98 was equivalent to analyzed the total pore volume of SBA-15 samples. The data from BJH pore size distribution desorption is required to determine exactly pore size distribution (PSD). The adsorption-desorption isotherm properties for analyzing specific surface area (SBET) was obtained using the multi-point BET data.

2.3.2 Physicochemical properties

Using the X-ray diffraction (XRD) and verifying at the actual pore structure properties, it was possible to identify the crystal phase of SBA-15 samples. The instrument analysis XRD pattern was measured using Bruker D8 Phaser Diffractometer model with Cu ka radiation source with wavelength = 1.5406 Å, kb 1.3922 Å, and run of the X-ray tube at 40 kV, 20 mA. The diffraction data were observed in the 2q range from 5o to 90o, with a step size of 0.02o and the step time of 1 s. To analyze the surface morphology and the content of SBA-15 samples were characterized by using a scanning electron microscope (SEM with EDX) SU3500 model, running distance at 4940 μm and 10 kV of electron voltage with the high energy electron beam. The content of Si and O spectrum were determined by SU3500 EDX type at 15 kV and lifetime 30 s. The instrument of 8400S SHIMADZU infrared spectroscopy was used to present data about chemical bond and functional groups of SBA-15 samples base on their characteristic absorption of infrared radiation in vibrational modes. For SBA-15 samples, we used scanned 450-4000 cm-1 of the range wavenumbers and ground together with KBr to the made pellet and placed into the DRIFT cell.

Ethical approval: The conducted research is not related to either human or animal use.

3 Result and discussion

3.1 Physisorption isotherm analysis

Surface area is a key property of mesoporous materials by physisorption methods [21]. The result obtained from the preliminary analysis of high surface area for SBA-15 is presented in Figure 1. Interestingly, the increased surface area of SBA-15 at higher p/po (0.7-0.9) is related to Type IV isotherm [22]. The nitrogen adsorption on samples occur at the beginning process P/Po at the range of 0 to 0.5 was adsorption in microporous initiated with the single layer of the material surface. On relative pressure of 0.6 to 0.9, there was parallel hysteresis loop adsorption-desorption, in which the adsorption of vapor pressure increasing is followed by desorption of vapor pressure decreasing simultaneously. It shows that the sample was mesoporous material and has uniform size pore

Figure 1 Nitrogen adsorption-desorption isotherm of SBA-15 samples.
Figure 1

Nitrogen adsorption-desorption isotherm of SBA-15 samples.

Figure 1 presents a typical isotherm, it is a relation of the amount of adsorbed volume and the relative pressure of adsorbed. A feature of the Type IV isotherm is typical for porous materials. At higher pressure, there is a hysteresis loop that can explain how the pore is shaped and identified with specific pore structure. All samples show a confirm step with a hysteresis loop corresponding type of H1 with narrow pore size distribution. Figure 1 provides some of the main characteristics of mesoporous materials. It is encouraging to compare this figure with that found by other authors [4, 5, 6].

The nitrogen sorption measurement by the Brunauer-Emmett-Teller (BET) method has the most widely used standard for the calculation of the surface area [22]. One unanticipated finding was that the higher surface area of SBA_4 sample of 1726 m2/g, the pore volume of 1.4 cc/ g, and pore diameter of 3.2 nm. There are several possible explanations for this result. Change in the amount of PVA and the time for hydrothermal treatment were compared using physisorption analysis. The interaction of PVA with surfactant template during preparation process indicated that near significant effect on the micelles formed of P123. These results suggest that the diameter and pore volume for all samples are relatively stable. However, the interaction of PVA occurs on the surface area of silica. In the future investigation, it might be possible to use a different condition of time hydrothermal treatment and some variables synthesis of mesoporous materials. The correlation between the time of hydrothermal treatment and the amount of PVA by physisorption analysis is shown in Table 2.

Table 2

Physisorption analysis of SBA-15 samples with some variables.

SBA-15 sampleConditionsSBET (m2/g)Dp (nm)Vp (cc/g)
1PVA 1 g, 20 h6284.41.40
2PVA 2 g, 20 h7803.81.48
3PVA 1 g, 24 h8924.21.87
4PVA 2 g, 24 h17263.21.40
5PVA 1 g, 96 h6994.01.40

Table 2 presents the experimental data based on the surface analysis (SBET), pore diameter (Dp, nm) and pore volume (Vp, cc/ g). The results of the correlational analysis are presented in Table 2, the higher surface area of SBA_4 generated the lower pore diameter. A positive correlation was found between surface area increases and the pore diameter decreases. The pore volume of the samples not significant, only in the range of 1.40 to 1.87 cc/g. The largest pore volume was SBA_3 (PVA 1 g, 24 h), we can see that the amount of PVA did not effect expanding the pore volume. In the current study, comparing the role of PVA only affect to increase surface area, but no interactive with micelles formed from the surfactant template [4]. However, it is different for the time of hydrothermal treatment. The effect of time hydrothermal treatment and the amount PVA on the particle size distribution of mesoporous silica SBA-15 was explored, and the results are presented in Figure 2. The graph shows that there has been stable in pore volume and pore diameter for all the samples

Figure 2 Pore size determination of SBA-15 samples. BJH desorption particle size distribution (left); the relation between pore size and pore volume (right).
Figure 2

Pore size determination of SBA-15 samples. BJH desorption particle size distribution (left); the relation between pore size and pore volume (right).

As shown in Figure 2(left), SBA_3 (PVA=2 g, t=24 h) had a surface area of 892 m2/g and pore volume of 1.87 cc/ g. However, if the time of hydrothermal treatment increased the surface area and pore volume is decreased. This condition can be seen at SBA_5 (PVA=2 g, t=96 h). In reviewing the literature, no data was found on the combination between the addition of PVA and adjusting of time hydrothermal treatment. The result of the correlation analysis is summarised in Figure 1. The addition of the amount PVA 2 g and time hydrothermal is raised from 20 h to 96 h, the surface area was increased but the pore volume and pore diameter were slightly more stable. It can be compared to Figure 1 for SBA_1, can be explained that the time of TEOS as a precursor interacts with the surfactant template at the condensation step in teflon has not reached perfect time. Further work, this is an important issue, it requires the higher surface area, the larger pore volume and pore diameter we can do addition PVA 2 g by adjusting the time of hydrothermal treatment in the range 24 to 96 h.

3.2 X-ray diffraction analysis

Powder X-ray diffraction method was applied to characterize the crystal phase and structure of SBA-15 samples. The X-ray diffraction pattern was at 2θ between 5o and 90o for five SBA-15 samples. Figure 3 shows that the SBA-15 has been successfully formed the based on the amorphous peak approach at 2θ = 23o, corresponding just to the planar (100) with hexagonal planar symmetry (p6mm) [23]. All the samples are amorphous material around 82%.

Figure 3 X-ray diffraction pattern on the SBA-15 samples.
Figure 3

X-ray diffraction pattern on the SBA-15 samples.

Except for the sample of SBA_1, it has been investigated that the crystal system is orthorhombic (not general properties of SBA-15) with space group pmmm, d spacing of the silica is 20.5 Å corresponding to a unit cell parameter, ao = 20.57 Å and bo = 9.74 Å. This case can be explained that the amount of PVA 1 g for 20 h of the time hydrothermal treatment had not been reached to the hexagonal structure of SBA-15. This result diffraction pattern was corresponding to the match with COD-InorgREV204654. Although the exclusion of the crystal structure can reduce the effect of the amount PVA and the time of hydrothermal treatment, these result should be interpreted with caution [3,4]

In one well known recent experiment, limit on wide-angle X-ray diffraction (WAXRD) pattern was found to be diffusion straight peak of amorphous materials at 2θ = 23o was reported [23]. As shown in Figure 3, the peak amorphous of SBA_5 reported significantly more than the other samples. From the data in Figure 3, it is apparent that the length of time for hydrothermal treatment, the amorphous part can be increased. The amorphous part for the sample of SBA-15 were 81.4%; 83.4%; 82.6%; 82.4%, and 83.6% respectively. The value of amorphous composition suggests that a weak correlation may exist between the amount PVA and the time for hydrothermal treatment. A further study with more focus on the amount PVA is therefore suggested.

Figure 5 presents the result obtained from the formation of the surfactant template. The template of mesostructure SBA-15 can be arranged during the preparation process of Pluronic. Micelle formation with Pluronic plays an important role in the structure of mesoporous materials. The critical micelle concentration (CMC) of the surfactant template can do in several varieties of pore size and mesostructure. The influence of addition PVA in the preparation process of mesoporous silica materials has increased the surface area [4]. The next interaction between TEOS as a silica precursor and Pluronic by hydrothermal treatment to high stability materials [9]. Calcination process to remove the surfactant template. The end of the process, silica mesoporous SBA-15 was obtained with high surface area and high thermal stability. Interestingly, the various preparation surfactant template and addition PVA were observed to huge potential application in many industries.

Figure 4 Reaction mechanism of silica.
Figure 4

Reaction mechanism of silica.

Figure 5 Illustration of the formation mesostructure of SBA-15 [6,24].
Figure 5

Illustration of the formation mesostructure of SBA-15 [6,24].

3.3 FTIR spectroscopy analysis

The function group and feature of the SBA-15 samples were identified base on FTIR analysis. The FTIR spectroscopy analysis of SBA-15 has verified that the band absorption of spectra from Si-O, Si-O-Si, Si-OH, and –OH were performed. The spectra of the samples can be compared for vibration peak of the characteristic silica SBA-15. The band absorption peaks from the Figure 4 can be seen 477 cm-1, 817 cm-1, 1215 cm-1, 1641 cm-1, and 3462 cm-1 were characteristic peaks IR for SBA-15 materials

Spectra of all samples are shown in Figure 6, that the peaks at 816 cm-1 with strong intensity by the presence of SiO-H groups [23]. The bending of the O-Si-O defined near at 478 cm-1 with stretching vibration of the existence of silanol groups. The sharp peak at 1646 cm-1 indicates that the formed –OH groups (H-O-H) [15,25]. The bands at the peak 3468 cm-1 were defined to the band group H-O-H (H2O molecules) [26]. In fact, the characterization of SBA-15 samples is identified with similar spectra in the mesostructure of the various synthesized of SBA-15.

Figure 6 FTIR spectra of the SBA-15 samples.
Figure 6

FTIR spectra of the SBA-15 samples.

3.4 Morphology analysis

The scanning electron microscopy (SEM) image of the SBA-15 samples (SBA_3 and SBA_5) is shown in Figure 5 successively. SEM analysis was incredible analysis for showing the surface morphologies of SBA-15 samples. Figures 5 shows that the mesoporous silica SBA-15 consists of the narrow pore with well ordered hexagonal arrays of mesoporous materials [25,27,28]

The comparison between Figure 7(a) and 7(b) reveals that the increased the time of the hydrothermal treatment can reduce the aggregate into well ordered porous materials. The SEM image of SBA_5 gives an expression that the sample relative uniform. The longer hydrothermal treatment (96 hours) caused the more number of a particle formed with smaller size, it was caused by the interaction time between micelle surfactant and precursor formation during hydrothermal treatment. The resulting analysis of SEM has same correlation with XRD analysis, in which SBA_5 (amorphous part = 83.6%) has a higher amorphous level compare to SBA_3 (82.6%)

Figure 7 SEM image of the SBA-15 samples: (a) SBA_3 and (b) SBA_5.
Figure 7

SEM image of the SBA-15 samples: (a) SBA_3 and (b) SBA_5.

Compositional analysis of surface morphology and topology from SBA-15 is considered by SEM/EDX as shown in Figure 8. The EDX spectra of SBA_3 and SBA_5 indicated the presence of Si = 44.81% and oxygen = 55.19%, for SBA_5 indicated the weight composition of Si = 41.06% and the composition of oxygen are 58.94%. The percentage of silica in the EDX analysis was identified that the synthesized silica material had been successful with uniform composition. This result can be proven by physical-sorption analysis, which the parallel process adsorption by desorption simultaneously

Figure 8 SEM EDX of the SBA-15 samples.
Figure 8

SEM EDX of the SBA-15 samples.

4 Conclusion

The high surface area of SBA-15 was synthesized base on an addition to the amount of PVA and adjusting the time of hydrothermal treatment. Physicochemical properties have been characterized by XRD, FTIR, and SEM/EDX. The BET method was found the higher surface area from the SBA_4 by addition of 2 g PVA and 24 h for the time hydrothermal treatment. The addition of a little amount of PVA and a short time hydrothermal treatment (SBA_1) can be changed to orthorhombic crystal structure and has a lower surface area than all samples. It can be suggested that the silica mesoporous SBA-15 will have potential application prospect in catalysis, storage, and adsorbent

Acknowledgments

Authors would wish to Ministry of Research, Technology and Higher Education of the Republic of Indonesia, for the Doctoral Grand Program in 2018 and Scholarship for Postgraduate Education in the Country for financial assistance to carry out the research.

  1. Conflict of interest: Authors declare no conflict of interest.

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Received: 2018-09-18
Accepted: 2019-05-16
Published Online: 2019-12-31

© 2019 Ridhawati Thahir et al., published by De Gruyter

This work is licensed under the Creative Commons Attribution 4.0 Public License.

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  12. Characteristics of Stable Hydrogen and Oxygen Isotopes of Soil Moisture under Different Land Use in Dry Hot Valley of Yuanmou
  13. Specific, highly sensitive and simple spectrofluorimetric method for quantification of daclatasvir in HCV human plasma patients and in tablets dosage form
  14. Chromium-modified cobalt molybdenum nitrides as catalysts for ammonia synthesis
  15. Langerhans cell-like dendritic cells treated with ginsenoside Rh2 regulate the differentiation of Th1 and Th2 cells in vivo
  16. Identification of Powdery Mildew Blumeria graminis f. sp. tritici Resistance Genes in Selected Wheat Varieties and Development of Multiplex PCR
  17. Computational Analysis of new Degree-based descriptors of oxide networks
  18. The Use Of Chemical Composition And Additives To Classify Petrol And Diesel Using Gas Chromatography–Mass Spectrometry And Chemometric Analysis: A Uk Study
  19. Minimal Energy Tree with 4 Branched Vertices
  20. Jatropha seed oil derived poly(esteramide-urethane)/ fumed silica nanocomposite coatings for corrosion protection
  21. Calculating topological indices of certain OTIS interconnection networks
  22. Energy storage analysis of R125 in UIO-66 and MOF-5 nanoparticles: A molecular simulation study
  23. Velvet Antler compounds targeting major cell signaling pathways in osteosarcoma - a new insight into mediating the process of invasion and metastasis in OS
  24. Effects of Azadirachta Indica Leaf Extract, Capping Agents, on the Synthesis of Pure And Cu Doped ZnO-Nanoparticles: A Green Approach and Microbial Activity
  25. Aqueous Micro-hydration of Na+(H2O)n=1-7 Clusters: DFT Study
  26. A proposed image-based detection of methamidophos pesticide using peroxyoxalate chemiluminescence system
  27. Phytochemical screening and estrogenic activity of total glycosides of Cistanche deserticola
  28. Biological evaluation of a series of benzothiazole derivatives as mosquitocidal agents
  29. Chemical pretreatments of Trapa bispinosa's peel (TBP) biosorbent to enhance adsorption capacity for Pb(ll)
  30. Dynamic Changes in MMP1 and TIMP1 in the Antifibrotic Process of Dahuang Zhechong Pill in Rats with Liver Fibrosis
  31. The Optimization and Production of Ginkgolide B Lipid Microemulsion
  32. Photodynamic Therapy Enhanced the Antitumor Effects of Berberine on HeLa Cells
  33. Chiral and Achiral Enantiomeric Separation of (±)-Alprenolol
  34. Correlation of Water Fluoride with Body Fluids, Dental Fluorosis and FT4, FT3 –TSH Disruption among Children in an Endemic Fluorosis area in Pakistan
  35. A one-step incubation ELISA kit for rapid determination of dibutyl phthalate in water, beverage and liquor
  36. Free Radical Scavenging Activity of Essential Oil of Eugenia caryophylata from Amboina Island and Derivatives of Eugenol
  37. Effects of Blue and Red Light On Growth And Nitrate Metabolism In Pakchoi
  38. miRNA-199a-5p functions as a tumor suppressor in prolactinomas
  39. Solar photodegradation of carbamazepine from aqueous solutions using a compound parabolic concentrator equipped with a sun tracking system
  40. Influence of sub-inhibitory concentration of selected plant essential oils on the physical and biochemical properties of Pseudomonas orientalis
  41. Preparation and spectroscopic studies of Fe(II), Ru(II), Pd(II) and Zn(II) complexes of Schiff base containing terephthalaldehyde and their transfer hydrogenation and Suzuki-Miyaura coupling reaction
  42. Complex formation in a liquid-liquid extraction-chromogenic system for vanadium(IV)
  43. Synthesis, characterization (IR, 1H, 13C & 31P NMR), fungicidal, herbicidal and molecular docking evaluation of steroid phosphorus compounds
  44. Analysis and Biological Evaluation of Arisaema Amuremse Maxim Essential Oil
  45. A preliminary assessment of potential ecological risk and soil contamination by heavy metals around a cement factory, western Saudi Arabia
  46. Anti- inflammatory effect of Prunus tomentosa Thunb total flavones in LPS-induced RAW264.7 cells
  47. Collaborative Influence of Elevated CO2 Concentration and High Temperature on Potato Biomass Accumulation and Characteristics
  48. Methods of extraction, physicochemical properties of alginates and their applications in biomedical field – a review
  49. Characteristics of liposomes derived from egg yolk
  50. Preparation of ternary ZnO/Ag/cellulose and its enhanced photocatalytic degradation property on phenol and benzene in VOCs
  51. Influence of Human Serum Albumin Glycation on the Binding Affinities for Natural Flavonoids
  52. Synthesis and antioxidant activity of 2-methylthio-pyrido[3,2-e][1,2,4] triazolo[1,5-a]pyrimidines
  53. Comparative study on the antioxidant activities of ten common flower teas from China
  54. Molecular Properties of Symmetrical Networks Using Topological Polynomials
  55. Synthesis of Co3O4 Nano Aggregates by Co-precipitation Method and its Catalytic and Fuel Additive Applications
  56. Phytochemical analysis, Antioxidant and Antiprotoscolices potential of ethanol extracts of selected plants species against Echinococcus granulosus: In-vitro study
  57. Silver nanoparticles enhanced fluorescence for sensitive determination of fluoroquinolones in water solutions
  58. Simultaneous Quantification of the New Psychoactive Substances 3-FMC, 3-FPM, 4-CEC, and 4-BMC in Human Blood using GC-MS
  59. Biodiesel Production by Lipids From Indonesian strain of Microalgae Chlorella vulgaris
  60. Miscibility studies of polystyrene/polyvinyl chloride blend in presence of organoclay
  61. Antibacterial Activities of Transition Metal complexes of Mesocyclic Amidine 1,4-diazacycloheptane (DACH)
  62. Novel 1,8-Naphthyridine Derivatives: Design, Synthesis and in vitro screening of their cytotoxic activity against MCF7 cell line
  63. Investigation of Stress Corrosion Cracking Behaviour of Mg-Al-Zn Alloys in Different pH Environments by SSRT Method
  64. Various Combinations of Flame Retardants for Poly (vinyl chloride)
  65. Phenolic compounds and biological activities of rye (Secale cereale L.) grains
  66. Oxidative degradation of gentamicin present in water by an electro-Fenton process and biodegradability improvement
  67. Optimizing Suitable Conditions for the Removal of Ammonium Nitrogen by a Microbe Isolated from Chicken Manure
  68. Anti-inflammatory, antipyretic, analgesic, and antioxidant activities of Haloxylon salicornicum aqueous fraction
  69. The anti-corrosion behaviour of Satureja montana L. extract on iron in NaCl solution
  70. Interleukin-4, hemopexin, and lipoprotein-associated phospholipase A2 are significantly increased in patients with unstable carotid plaque
  71. A comparative study of the crystal structures of 2-(4-(2-(4-(3-chlorophenyl)pipera -zinyl)ethyl) benzyl)isoindoline-1,3-dione by synchrotron radiation X-ray powder diffraction and single-crystal X-ray diffraction
  72. Conceptual DFT as a Novel Chemoinformatics Tool for Studying the Chemical Reactivity Properties of the Amatoxin Family of Fungal Peptides
  73. Occurrence of Aflatoxin M1 in Milk-based Mithae samples from Pakistan
  74. Kinetics of Iron Removal From Ti-Extraction Blast Furnace Slag by Chlorination Calcination
  75. Increasing the activity of DNAzyme based on the telomeric sequence: 2’-OMe-RNA and LNA modifications
  76. Exploring the optoelectronic properties of a chromene-appended pyrimidone derivative for photovoltaic applications
  77. Effect of He Qi San on DNA Methylation in Type 2 Diabetes Mellitus Patients with Phlegm-blood Stasis Syndrome
  78. Cyclodextrin potentiometric sensors based on selective recognition sites for procainamide: Comparative and theoretical study
  79. Greener synthesis of dimethyl carbonate from carbon dioxide and methanol using a tunable ionic liquid catalyst
  80. Nonisothermal Cold Crystallization Kinetics of Poly(lactic acid)/Bacterial Poly(hydroxyoctanoate) (PHO)/Talc
  81. Enhanced adsorption of sulfonamide antibiotics in water by modified biochar derived from bagasse
  82. Study on the Mechanism of Shugan Xiaozhi Fang on Cells with Non-alcoholic Fatty Liver Disease
  83. Comparative Effects of Salt and Alkali Stress on Antioxidant System in Cotton (Gossypium Hirsutum L.) Leaves
  84. Optimization of chromatographic systems for analysis of selected psychotropic drugs and their metabolites in serum and saliva by HPLC in order to monitor therapeutic drugs
  85. Electrocatalytic Properties of Ni-Doped BaFe12O19 for Oxygen Evolution in Alkaline Solution
  86. Study on the removal of high contents of ammonium from piggery wastewater by clinoptilolite and the corresponding mechanisms
  87. Phytochemistry and toxicological assessment of Bryonia dioica roots used in north-African alternative medicine
  88. The essential oil composition of selected Hemerocallis cultivars and their biological activity
  89. Mechanical Properties of Carbon Fiber Reinforced Nanocrystalline Nickel Composite Electroforming Deposit
  90. Anti-c-myc efficacy block EGFL7 induced prolactinoma tumorigenesis
  91. Topical Issue on Applications of Mathematics in Chemistry
  92. Zagreb Connection Number Index of Nanotubes and Regular Hexagonal Lattice
  93. The Sanskruti index of trees and unicyclic graphs
  94. Valency-based molecular descriptors of Bakelite network BNmn
  95. Computing Topological Indices for Para-Line Graphs of Anthracene
  96. Zagreb Polynomials and redefined Zagreb indices of Dendrimers and Polyomino Chains
  97. Topological Descriptor of 2-Dimensional Silicon Carbons and Their Applications
  98. Topological invariants for the line graphs of some classes of graphs
  99. Words for maximal Subgroups of Fi24‘
  100. Generators of Maximal Subgroups of Harada-Norton and some Linear Groups
  101. Special Issue on POKOCHA 2018
  102. Influence of Production Parameters on the Content of Polyphenolic Compounds in Extruded Porridge Enriched with Chokeberry Fruit (Aronia melanocarpa (Michx.) Elliott)
  103. Effects of Supercritical Carbon Dioxide Extraction (SC-CO2) on the content of tiliroside in the extracts from Tilia L. flowers
  104. Impact of xanthan gum addition on phenolic acids composition and selected properties of new gluten-free maize-field bean pasta
  105. Impact of storage temperature and time on Moldavian dragonhead oil – spectroscopic and chemometric analysis
  106. The effect of selected substances on the stability of standard solutions in voltammetric analysis of ascorbic acid in fruit juices
  107. Determination of the content of Pb, Cd, Cu, Zn in dairy products from various regions of Poland
  108. Special Issue on IC3PE 2018 Conference
  109. The Photocatalytic Activity of Zns-TiO2 on a Carbon Fiber Prepared by Chemical Bath Deposition
  110. N-octyl chitosan derivatives as amphiphilic carrier agents for herbicide formulations
  111. Kinetics and Mechanistic Study of Hydrolysis of Adenosine Monophosphate Disodium Salt (AMPNa2) in Acidic and Alkaline Media
  112. Antimalarial Activity of Andrographis Paniculata Ness‘s N-hexane Extract and Its Major Compounds
  113. Special Issue on ABB2018 Conference
  114. Special Issue on ICCESEN 2017
  115. Theoretical Diagnostics of Second and Third-order Hyperpolarizabilities of Several Acid Derivatives
  116. Determination of Gamma Rays Efficiency Against Rhizoctonia solani in Potatoes
  117. Studies On Compatibilization Of Recycled Polyethylene/Thermoplastic Starch Blends By Using Different Compatibilizer
  118. Liquid−Liquid Extraction of Linalool from Methyl Eugenol with 1-Ethyl-3-methylimidazolium Hydrogen Sulfate [EMIM][HSO4] Ionic Liquid
  119. Synthesis of Graphene Oxide Through Ultrasonic Assisted Electrochemical Exfoliation
  120. Special Issue on ISCMP 2018
  121. Synthesis and antiproliferative evaluation of some 1,4-naphthoquinone derivatives against human cervical cancer cells
  122. The influence of the grafted aryl groups on the solvation properties of the graphyne and graphdiyne - a MD study
  123. Electrochemical modification of platinum and glassy carbon surfaces with pyridine layers and their use as complexing agents for copper (II) ions
  124. Effect of Electrospinning Process on Total Antioxidant Activity of Electrospun Nanofibers Containing Grape Seed Extract
  125. Effect Of Thermal Treatment Of Trepel At Temperature Range 800-1200˚C
  126. Topical Issue on Agriculture
  127. The effect of Cladophora glomerata exudates on the amino acid composition of Cladophora fracta and Rhizoclonium sp.
  128. Influence of the Static Magnetic Field and Algal Extract on the Germination of Soybean Seeds
  129. The use of UV-induced fluorescence for the assessment of homogeneity of granular mixtures
  130. The use of microorganisms as bio-fertilizers in the cultivation of white lupine
  131. Lyophilized apples on flax oil and ethyl esters of flax oil - stability and antioxidant evaluation
  132. Production of phosphorus biofertilizer based on the renewable materials in large laboratory scale
  133. Human health risk assessment of potential toxic elements in paddy soil and rice (Oryza sativa) from Ugbawka fields, Enugu, Nigeria
  134. Recovery of phosphates(V) from wastewaters of different chemical composition
  135. Special Issue on the 4th Green Chemistry 2018
  136. Dead zone for hydrogenation of propylene reaction carried out on commercial catalyst pellets
  137. Improved thermally stable oligoetherols from 6-aminouracil, ethylene carbonate and boric acid
  138. The role of a chemical loop in removal of hazardous contaminants from coke oven wastewater during its treatment
  139. Combating paraben pollution in surface waters with a variety of photocatalyzed systems: Looking for the most efficient technology
  140. Special Issue on Chemistry Today for Tomorrow 2019
  141. Applying Discriminant and Cluster Analyses to Separate Allergenic from Non-allergenic Proteins
  142. Chemometric Expertise Of Clinical Monitoring Data Of Prolactinoma Patients
  143. Chemomertic Risk Assessment of Soil Pollution
  144. New composite sorbent for speciation analysis of soluble chromium in textiles
  145. Photocatalytic activity of NiFe2O4 and Zn0.5Ni0.5Fe2O4 modified by Eu(III) and Tb(III) for decomposition of Malachite Green
  146. Photophysical and antibacterial activity of light-activated quaternary eosin Y
  147. Spectral properties and biological activity of La(III) and Nd(III) Monensinates
  148. Special Issue on Monitoring, Risk Assessment and Sustainable Management for the Exposure to Environmental Toxins
  149. Soil organic carbon mineralization in relation to microbial dynamics in subtropical red soils dominated by differently sized aggregates
  150. A potential reusable fluorescent aptasensor based on magnetic nanoparticles for ochratoxin A analysis
  151. Special Issue on 13th JCC 2018
  152. Fluorescence study of 5-nitroisatin Schiff base immobilized on SBA-15 for sensing Fe3+
  153. Thermal and Morphology Properties of Cellulose Nanofiber from TEMPO-oxidized Lower part of Empty Fruit Bunches (LEFB)
  154. Encapsulation of Vitamin C in Sesame Liposomes: Computational and Experimental Studies
  155. A comparative study of the utilization of synthetic foaming agent and aluminum powder as pore-forming agents in lightweight geopolymer synthesis
  156. Synthesis of high surface area mesoporous silica SBA-15 by adjusting hydrothermal treatment time and the amount of polyvinyl alcohol
  157. Review of large-pore mesostructured cellular foam (MCF) silica and its applications
  158. Ion Exchange of Benzoate in Ni-Al-Benzoate Layered Double Hydroxide by Amoxicillin
  159. Synthesis And Characterization Of CoMo/Mordenite Catalyst For Hydrotreatment Of Lignin Compound Models
  160. Production of Biodiesel from Nyamplung (Calophyllum inophyllum L.) using Microwave with CaO Catalyst from Eggshell Waste: Optimization of Transesterification Process Parameters
  161. The Study of the Optical Properties of C60 Fullerene in Different Organic Solvents
  162. Composite Material Consisting of HKUST-1 and Indonesian Activated Natural Zeolite and its Application in CO2 Capture
  163. Topical Issue on Environmental Chemistry
  164. Ionic liquids modified cobalt/ZSM-5 as a highly efficient catalyst for enhancing the selectivity towards KA oil in the aerobic oxidation of cyclohexane
  165. Application of Thermal Resistant Gemini Surfactants in Highly Thixotropic Water-in-oil Drilling Fluid System
  166. Screening Study on Rheological Behavior and Phase Transition Point of Polymer-containing Fluids produced under the Oil Freezing Point Temperature
  167. The Chemical Softening Effect and Mechanism of Low Rank Coal Soaked in Alkaline Solution
  168. The Influence Of NO/O2 On The NOx Storage Properties Over A Pt-Ba-Ce/γ-Al2O3 Catalyst
  169. Special Issue on the International conference CosCI 2018
  170. Design of SiO2/TiO2 that Synergistically Increases The Hydrophobicity of Methyltrimethoxysilane Coated Glass
  171. Antidiabetes and Antioxidant agents from Clausena excavata root as medicinal plant of Myanmar
  172. Development of a Gold Immunochromatographic Assay Method Using Candida Biofilm Antigen as a Bioreceptor for Candidiasis in Rats
  173. Special Issue on Applied Biochemistry and Biotechnology 2019
  174. Adsorption of copper ions on Magnolia officinalis residues after solid-phase fermentation with Phanerochaete chrysosporium
  175. Erratum
  176. Erratum to: Sand Dune Characterization For Preparing Metallurgical Grade Silicon
https://doi.org/10.1515/chem-2019-0106
Keywords for this article
mesoporous silica; SBA-15; surface area; hydrothermal treatment
Creative Commons
BY 4.0

Articles in the same Issue

  1. Regular Articles
  2. Research on correlation of compositions with oestrogenic activity of Cistanche based on LC/Q-TOF-MS/MS technology
  3. Efficacy of Pyrus elaeagnifolia subsp. elaeagnifolia in acetic acid–induced colitis model
  4. Anti-inflammatory and antinociceptive features of Bryonia alba L.: As a possible alternative in treating rheumatism
  5. High efficiency liposome fusion induced by reducing undesired membrane peptides interaction
  6. Prediction of the Blood-Brain Barrier Permeability Using RP-18 Thin Layer Chromatography
  7. Phytic Acid Extracted from Rice Bran as a Growth Promoter for Euglena gracilis
  8. Development of a validated spectrofluorimetric method for assay of sotalol hydrochloride in tablets and human plasma: application for stability-indicating studies
  9. Topological Indices of Hyaluronic Acid-Paclitaxel Conjugates’ Molecular Structure in Cancer Treatment
  10. Thermodynamic properties of the bubble growth process in a pool boiling of water-ethanol mixture two-component system
  11. Critical Roles of the PI3K-Akt-mTOR Signaling Pathway in Apoptosis and Autophagy of Astrocytes Induced by Methamphetamine
  12. Characteristics of Stable Hydrogen and Oxygen Isotopes of Soil Moisture under Different Land Use in Dry Hot Valley of Yuanmou
  13. Specific, highly sensitive and simple spectrofluorimetric method for quantification of daclatasvir in HCV human plasma patients and in tablets dosage form
  14. Chromium-modified cobalt molybdenum nitrides as catalysts for ammonia synthesis
  15. Langerhans cell-like dendritic cells treated with ginsenoside Rh2 regulate the differentiation of Th1 and Th2 cells in vivo
  16. Identification of Powdery Mildew Blumeria graminis f. sp. tritici Resistance Genes in Selected Wheat Varieties and Development of Multiplex PCR
  17. Computational Analysis of new Degree-based descriptors of oxide networks
  18. The Use Of Chemical Composition And Additives To Classify Petrol And Diesel Using Gas Chromatography–Mass Spectrometry And Chemometric Analysis: A Uk Study
  19. Minimal Energy Tree with 4 Branched Vertices
  20. Jatropha seed oil derived poly(esteramide-urethane)/ fumed silica nanocomposite coatings for corrosion protection
  21. Calculating topological indices of certain OTIS interconnection networks
  22. Energy storage analysis of R125 in UIO-66 and MOF-5 nanoparticles: A molecular simulation study
  23. Velvet Antler compounds targeting major cell signaling pathways in osteosarcoma - a new insight into mediating the process of invasion and metastasis in OS
  24. Effects of Azadirachta Indica Leaf Extract, Capping Agents, on the Synthesis of Pure And Cu Doped ZnO-Nanoparticles: A Green Approach and Microbial Activity
  25. Aqueous Micro-hydration of Na+(H2O)n=1-7 Clusters: DFT Study
  26. A proposed image-based detection of methamidophos pesticide using peroxyoxalate chemiluminescence system
  27. Phytochemical screening and estrogenic activity of total glycosides of Cistanche deserticola
  28. Biological evaluation of a series of benzothiazole derivatives as mosquitocidal agents
  29. Chemical pretreatments of Trapa bispinosa's peel (TBP) biosorbent to enhance adsorption capacity for Pb(ll)
  30. Dynamic Changes in MMP1 and TIMP1 in the Antifibrotic Process of Dahuang Zhechong Pill in Rats with Liver Fibrosis
  31. The Optimization and Production of Ginkgolide B Lipid Microemulsion
  32. Photodynamic Therapy Enhanced the Antitumor Effects of Berberine on HeLa Cells
  33. Chiral and Achiral Enantiomeric Separation of (±)-Alprenolol
  34. Correlation of Water Fluoride with Body Fluids, Dental Fluorosis and FT4, FT3 –TSH Disruption among Children in an Endemic Fluorosis area in Pakistan
  35. A one-step incubation ELISA kit for rapid determination of dibutyl phthalate in water, beverage and liquor
  36. Free Radical Scavenging Activity of Essential Oil of Eugenia caryophylata from Amboina Island and Derivatives of Eugenol
  37. Effects of Blue and Red Light On Growth And Nitrate Metabolism In Pakchoi
  38. miRNA-199a-5p functions as a tumor suppressor in prolactinomas
  39. Solar photodegradation of carbamazepine from aqueous solutions using a compound parabolic concentrator equipped with a sun tracking system
  40. Influence of sub-inhibitory concentration of selected plant essential oils on the physical and biochemical properties of Pseudomonas orientalis
  41. Preparation and spectroscopic studies of Fe(II), Ru(II), Pd(II) and Zn(II) complexes of Schiff base containing terephthalaldehyde and their transfer hydrogenation and Suzuki-Miyaura coupling reaction
  42. Complex formation in a liquid-liquid extraction-chromogenic system for vanadium(IV)
  43. Synthesis, characterization (IR, 1H, 13C & 31P NMR), fungicidal, herbicidal and molecular docking evaluation of steroid phosphorus compounds
  44. Analysis and Biological Evaluation of Arisaema Amuremse Maxim Essential Oil
  45. A preliminary assessment of potential ecological risk and soil contamination by heavy metals around a cement factory, western Saudi Arabia
  46. Anti- inflammatory effect of Prunus tomentosa Thunb total flavones in LPS-induced RAW264.7 cells
  47. Collaborative Influence of Elevated CO2 Concentration and High Temperature on Potato Biomass Accumulation and Characteristics
  48. Methods of extraction, physicochemical properties of alginates and their applications in biomedical field – a review
  49. Characteristics of liposomes derived from egg yolk
  50. Preparation of ternary ZnO/Ag/cellulose and its enhanced photocatalytic degradation property on phenol and benzene in VOCs
  51. Influence of Human Serum Albumin Glycation on the Binding Affinities for Natural Flavonoids
  52. Synthesis and antioxidant activity of 2-methylthio-pyrido[3,2-e][1,2,4] triazolo[1,5-a]pyrimidines
  53. Comparative study on the antioxidant activities of ten common flower teas from China
  54. Molecular Properties of Symmetrical Networks Using Topological Polynomials
  55. Synthesis of Co3O4 Nano Aggregates by Co-precipitation Method and its Catalytic and Fuel Additive Applications
  56. Phytochemical analysis, Antioxidant and Antiprotoscolices potential of ethanol extracts of selected plants species against Echinococcus granulosus: In-vitro study
  57. Silver nanoparticles enhanced fluorescence for sensitive determination of fluoroquinolones in water solutions
  58. Simultaneous Quantification of the New Psychoactive Substances 3-FMC, 3-FPM, 4-CEC, and 4-BMC in Human Blood using GC-MS
  59. Biodiesel Production by Lipids From Indonesian strain of Microalgae Chlorella vulgaris
  60. Miscibility studies of polystyrene/polyvinyl chloride blend in presence of organoclay
  61. Antibacterial Activities of Transition Metal complexes of Mesocyclic Amidine 1,4-diazacycloheptane (DACH)
  62. Novel 1,8-Naphthyridine Derivatives: Design, Synthesis and in vitro screening of their cytotoxic activity against MCF7 cell line
  63. Investigation of Stress Corrosion Cracking Behaviour of Mg-Al-Zn Alloys in Different pH Environments by SSRT Method
  64. Various Combinations of Flame Retardants for Poly (vinyl chloride)
  65. Phenolic compounds and biological activities of rye (Secale cereale L.) grains
  66. Oxidative degradation of gentamicin present in water by an electro-Fenton process and biodegradability improvement
  67. Optimizing Suitable Conditions for the Removal of Ammonium Nitrogen by a Microbe Isolated from Chicken Manure
  68. Anti-inflammatory, antipyretic, analgesic, and antioxidant activities of Haloxylon salicornicum aqueous fraction
  69. The anti-corrosion behaviour of Satureja montana L. extract on iron in NaCl solution
  70. Interleukin-4, hemopexin, and lipoprotein-associated phospholipase A2 are significantly increased in patients with unstable carotid plaque
  71. A comparative study of the crystal structures of 2-(4-(2-(4-(3-chlorophenyl)pipera -zinyl)ethyl) benzyl)isoindoline-1,3-dione by synchrotron radiation X-ray powder diffraction and single-crystal X-ray diffraction
  72. Conceptual DFT as a Novel Chemoinformatics Tool for Studying the Chemical Reactivity Properties of the Amatoxin Family of Fungal Peptides
  73. Occurrence of Aflatoxin M1 in Milk-based Mithae samples from Pakistan
  74. Kinetics of Iron Removal From Ti-Extraction Blast Furnace Slag by Chlorination Calcination
  75. Increasing the activity of DNAzyme based on the telomeric sequence: 2’-OMe-RNA and LNA modifications
  76. Exploring the optoelectronic properties of a chromene-appended pyrimidone derivative for photovoltaic applications
  77. Effect of He Qi San on DNA Methylation in Type 2 Diabetes Mellitus Patients with Phlegm-blood Stasis Syndrome
  78. Cyclodextrin potentiometric sensors based on selective recognition sites for procainamide: Comparative and theoretical study
  79. Greener synthesis of dimethyl carbonate from carbon dioxide and methanol using a tunable ionic liquid catalyst
  80. Nonisothermal Cold Crystallization Kinetics of Poly(lactic acid)/Bacterial Poly(hydroxyoctanoate) (PHO)/Talc
  81. Enhanced adsorption of sulfonamide antibiotics in water by modified biochar derived from bagasse
  82. Study on the Mechanism of Shugan Xiaozhi Fang on Cells with Non-alcoholic Fatty Liver Disease
  83. Comparative Effects of Salt and Alkali Stress on Antioxidant System in Cotton (Gossypium Hirsutum L.) Leaves
  84. Optimization of chromatographic systems for analysis of selected psychotropic drugs and their metabolites in serum and saliva by HPLC in order to monitor therapeutic drugs
  85. Electrocatalytic Properties of Ni-Doped BaFe12O19 for Oxygen Evolution in Alkaline Solution
  86. Study on the removal of high contents of ammonium from piggery wastewater by clinoptilolite and the corresponding mechanisms
  87. Phytochemistry and toxicological assessment of Bryonia dioica roots used in north-African alternative medicine
  88. The essential oil composition of selected Hemerocallis cultivars and their biological activity
  89. Mechanical Properties of Carbon Fiber Reinforced Nanocrystalline Nickel Composite Electroforming Deposit
  90. Anti-c-myc efficacy block EGFL7 induced prolactinoma tumorigenesis
  91. Topical Issue on Applications of Mathematics in Chemistry
  92. Zagreb Connection Number Index of Nanotubes and Regular Hexagonal Lattice
  93. The Sanskruti index of trees and unicyclic graphs
  94. Valency-based molecular descriptors of Bakelite network BNmn
  95. Computing Topological Indices for Para-Line Graphs of Anthracene
  96. Zagreb Polynomials and redefined Zagreb indices of Dendrimers and Polyomino Chains
  97. Topological Descriptor of 2-Dimensional Silicon Carbons and Their Applications
  98. Topological invariants for the line graphs of some classes of graphs
  99. Words for maximal Subgroups of Fi24‘
  100. Generators of Maximal Subgroups of Harada-Norton and some Linear Groups
  101. Special Issue on POKOCHA 2018
  102. Influence of Production Parameters on the Content of Polyphenolic Compounds in Extruded Porridge Enriched with Chokeberry Fruit (Aronia melanocarpa (Michx.) Elliott)
  103. Effects of Supercritical Carbon Dioxide Extraction (SC-CO2) on the content of tiliroside in the extracts from Tilia L. flowers
  104. Impact of xanthan gum addition on phenolic acids composition and selected properties of new gluten-free maize-field bean pasta
  105. Impact of storage temperature and time on Moldavian dragonhead oil – spectroscopic and chemometric analysis
  106. The effect of selected substances on the stability of standard solutions in voltammetric analysis of ascorbic acid in fruit juices
  107. Determination of the content of Pb, Cd, Cu, Zn in dairy products from various regions of Poland
  108. Special Issue on IC3PE 2018 Conference
  109. The Photocatalytic Activity of Zns-TiO2 on a Carbon Fiber Prepared by Chemical Bath Deposition
  110. N-octyl chitosan derivatives as amphiphilic carrier agents for herbicide formulations
  111. Kinetics and Mechanistic Study of Hydrolysis of Adenosine Monophosphate Disodium Salt (AMPNa2) in Acidic and Alkaline Media
  112. Antimalarial Activity of Andrographis Paniculata Ness‘s N-hexane Extract and Its Major Compounds
  113. Special Issue on ABB2018 Conference
  114. Special Issue on ICCESEN 2017
  115. Theoretical Diagnostics of Second and Third-order Hyperpolarizabilities of Several Acid Derivatives
  116. Determination of Gamma Rays Efficiency Against Rhizoctonia solani in Potatoes
  117. Studies On Compatibilization Of Recycled Polyethylene/Thermoplastic Starch Blends By Using Different Compatibilizer
  118. Liquid−Liquid Extraction of Linalool from Methyl Eugenol with 1-Ethyl-3-methylimidazolium Hydrogen Sulfate [EMIM][HSO4] Ionic Liquid
  119. Synthesis of Graphene Oxide Through Ultrasonic Assisted Electrochemical Exfoliation
  120. Special Issue on ISCMP 2018
  121. Synthesis and antiproliferative evaluation of some 1,4-naphthoquinone derivatives against human cervical cancer cells
  122. The influence of the grafted aryl groups on the solvation properties of the graphyne and graphdiyne - a MD study
  123. Electrochemical modification of platinum and glassy carbon surfaces with pyridine layers and their use as complexing agents for copper (II) ions
  124. Effect of Electrospinning Process on Total Antioxidant Activity of Electrospun Nanofibers Containing Grape Seed Extract
  125. Effect Of Thermal Treatment Of Trepel At Temperature Range 800-1200˚C
  126. Topical Issue on Agriculture
  127. The effect of Cladophora glomerata exudates on the amino acid composition of Cladophora fracta and Rhizoclonium sp.
  128. Influence of the Static Magnetic Field and Algal Extract on the Germination of Soybean Seeds
  129. The use of UV-induced fluorescence for the assessment of homogeneity of granular mixtures
  130. The use of microorganisms as bio-fertilizers in the cultivation of white lupine
  131. Lyophilized apples on flax oil and ethyl esters of flax oil - stability and antioxidant evaluation
  132. Production of phosphorus biofertilizer based on the renewable materials in large laboratory scale
  133. Human health risk assessment of potential toxic elements in paddy soil and rice (Oryza sativa) from Ugbawka fields, Enugu, Nigeria
  134. Recovery of phosphates(V) from wastewaters of different chemical composition
  135. Special Issue on the 4th Green Chemistry 2018
  136. Dead zone for hydrogenation of propylene reaction carried out on commercial catalyst pellets
  137. Improved thermally stable oligoetherols from 6-aminouracil, ethylene carbonate and boric acid
  138. The role of a chemical loop in removal of hazardous contaminants from coke oven wastewater during its treatment
  139. Combating paraben pollution in surface waters with a variety of photocatalyzed systems: Looking for the most efficient technology
  140. Special Issue on Chemistry Today for Tomorrow 2019
  141. Applying Discriminant and Cluster Analyses to Separate Allergenic from Non-allergenic Proteins
  142. Chemometric Expertise Of Clinical Monitoring Data Of Prolactinoma Patients
  143. Chemomertic Risk Assessment of Soil Pollution
  144. New composite sorbent for speciation analysis of soluble chromium in textiles
  145. Photocatalytic activity of NiFe2O4 and Zn0.5Ni0.5Fe2O4 modified by Eu(III) and Tb(III) for decomposition of Malachite Green
  146. Photophysical and antibacterial activity of light-activated quaternary eosin Y
  147. Spectral properties and biological activity of La(III) and Nd(III) Monensinates
  148. Special Issue on Monitoring, Risk Assessment and Sustainable Management for the Exposure to Environmental Toxins
  149. Soil organic carbon mineralization in relation to microbial dynamics in subtropical red soils dominated by differently sized aggregates
  150. A potential reusable fluorescent aptasensor based on magnetic nanoparticles for ochratoxin A analysis
  151. Special Issue on 13th JCC 2018
  152. Fluorescence study of 5-nitroisatin Schiff base immobilized on SBA-15 for sensing Fe3+
  153. Thermal and Morphology Properties of Cellulose Nanofiber from TEMPO-oxidized Lower part of Empty Fruit Bunches (LEFB)
  154. Encapsulation of Vitamin C in Sesame Liposomes: Computational and Experimental Studies
  155. A comparative study of the utilization of synthetic foaming agent and aluminum powder as pore-forming agents in lightweight geopolymer synthesis
  156. Synthesis of high surface area mesoporous silica SBA-15 by adjusting hydrothermal treatment time and the amount of polyvinyl alcohol
  157. Review of large-pore mesostructured cellular foam (MCF) silica and its applications
  158. Ion Exchange of Benzoate in Ni-Al-Benzoate Layered Double Hydroxide by Amoxicillin
  159. Synthesis And Characterization Of CoMo/Mordenite Catalyst For Hydrotreatment Of Lignin Compound Models
  160. Production of Biodiesel from Nyamplung (Calophyllum inophyllum L.) using Microwave with CaO Catalyst from Eggshell Waste: Optimization of Transesterification Process Parameters
  161. The Study of the Optical Properties of C60 Fullerene in Different Organic Solvents
  162. Composite Material Consisting of HKUST-1 and Indonesian Activated Natural Zeolite and its Application in CO2 Capture
  163. Topical Issue on Environmental Chemistry
  164. Ionic liquids modified cobalt/ZSM-5 as a highly efficient catalyst for enhancing the selectivity towards KA oil in the aerobic oxidation of cyclohexane
  165. Application of Thermal Resistant Gemini Surfactants in Highly Thixotropic Water-in-oil Drilling Fluid System
  166. Screening Study on Rheological Behavior and Phase Transition Point of Polymer-containing Fluids produced under the Oil Freezing Point Temperature
  167. The Chemical Softening Effect and Mechanism of Low Rank Coal Soaked in Alkaline Solution
  168. The Influence Of NO/O2 On The NOx Storage Properties Over A Pt-Ba-Ce/γ-Al2O3 Catalyst
  169. Special Issue on the International conference CosCI 2018
  170. Design of SiO2/TiO2 that Synergistically Increases The Hydrophobicity of Methyltrimethoxysilane Coated Glass
  171. Antidiabetes and Antioxidant agents from Clausena excavata root as medicinal plant of Myanmar
  172. Development of a Gold Immunochromatographic Assay Method Using Candida Biofilm Antigen as a Bioreceptor for Candidiasis in Rats
  173. Special Issue on Applied Biochemistry and Biotechnology 2019
  174. Adsorption of copper ions on Magnolia officinalis residues after solid-phase fermentation with Phanerochaete chrysosporium
  175. Erratum
  176. Erratum to: Sand Dune Characterization For Preparing Metallurgical Grade Silicon
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