Engineering of silver nanoparticle fabricated poly (N-isopropylacrylamide-co-acrylic acid) microgels for rapid catalytic reduction of nitrobenzene
-
Zahoor H. Farooqi
,
Khalida Naseem
Abstract
Three different poly(N-isopropylacrylamide-co-acrylic acid) [p(NIPAM-AA)] microgel samples were prepared using a precipitation polymerization method by varying the concentration of NIPAM and AA in aqueous medium. The microgels were used as microreactors to fabricate Ag nanoparticles (NPs) by in situ a reduction method. Fourier transform infrared (FTIR) and UV-visible spectroscopy were used to characterize the pure and hybrid microgels. The hybrid microgels with different AA content were used as catalysts for reduction of nitrobenzene (NB) into aniline. The progress of the reaction was monitored by a UV-visible spectrophotometer. The results show that the value of the apparent rate constant for catalytic reduction of NB decreases from 0.431 min-1 to 0.227 min-1 by increasing AA content from 3 mol% to 7 mol%, respectively. Decrease in apparent rate constant with increase of AA content can be attributed to an increase in hydrophilicity with increase of AA contents of the microgels. The increase in induction period with increase of AA contents indicates that diffusion of NB towards the catalytic surface becomes difficult due to an increase of hydrophilicity.
Acknowledgments
The authors are thankful to University of the Punjab, Lahore, Pakistan for financial support under a research grant for the fiscal year 2014–2015.
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©2016 by De Gruyter
Artikel in diesem Heft
- Frontmatter
- Review
- Development of biomaterial surfaces with and without microbial nanosegments
- Original articles
- Performance and field implementation of a new fracturing fluid consisting of hydrophobically associating polyacrylamide and anionic surfactant
- Enhancing electrical and tribological properties of poly(methyl methacrylate) matrix nanocomposite films by co-incorporation of multiwalled carbon nanotubes and silicon dioxide microparticles
- The effect of two commercial melt strength enhancer additives on the thermal, rheological and morphological properties of polylactide
- Preparation and characterization of reactive liquid rubbers toughened epoxy-clay hybrid nanocomposites
- Catalytic growth of multi-walled carbon nanotubes using NiFe2O4 nanoparticles and incorporation into epoxy matrix for enhanced mechanical properties
- Enhanced carbon dioxide separation by polyethersulfone (PES) mixed matrix membranes deposited with clay
- Excellent durability of epoxy modified mortars in corrosive environments
- Engineering of silver nanoparticle fabricated poly (N-isopropylacrylamide-co-acrylic acid) microgels for rapid catalytic reduction of nitrobenzene
- High efficiency fabrication of ultrahigh molecular weight polyethylene submicron filaments/sheets by flash-spinning
- On the origin of indentation size effects and depth dependent mechanical properties of elastic polymers
Artikel in diesem Heft
- Frontmatter
- Review
- Development of biomaterial surfaces with and without microbial nanosegments
- Original articles
- Performance and field implementation of a new fracturing fluid consisting of hydrophobically associating polyacrylamide and anionic surfactant
- Enhancing electrical and tribological properties of poly(methyl methacrylate) matrix nanocomposite films by co-incorporation of multiwalled carbon nanotubes and silicon dioxide microparticles
- The effect of two commercial melt strength enhancer additives on the thermal, rheological and morphological properties of polylactide
- Preparation and characterization of reactive liquid rubbers toughened epoxy-clay hybrid nanocomposites
- Catalytic growth of multi-walled carbon nanotubes using NiFe2O4 nanoparticles and incorporation into epoxy matrix for enhanced mechanical properties
- Enhanced carbon dioxide separation by polyethersulfone (PES) mixed matrix membranes deposited with clay
- Excellent durability of epoxy modified mortars in corrosive environments
- Engineering of silver nanoparticle fabricated poly (N-isopropylacrylamide-co-acrylic acid) microgels for rapid catalytic reduction of nitrobenzene
- High efficiency fabrication of ultrahigh molecular weight polyethylene submicron filaments/sheets by flash-spinning
- On the origin of indentation size effects and depth dependent mechanical properties of elastic polymers
