Activity of TiO2 Photocatalyst Modified with H2WO4 for Degradation of Organic Compounds in Water
-
B. Tryba
,
M. Piszcz
Abstract
TiO2 of anatase structure was modified with H2WO4 by wet impregnation method in a vaccuum evaporator and in autoclave under established temperature and pressure. After impregnation the samples were dried and submitted to calcination at 400 and 600 °C. The characteristics of obtained photocatalysts was investigated by XRD, UVVis/ DR, BET surface area, zeta potential, photoluminescence and OH radicals measurements. These photocatalysts were tested for photocatalytic decomposition of Acid Red, Methylene Blue, phenol and humic acids in water. The results showed that the presence of tungsten oxides compounds on the surface of TiO2 is beneficial because improves separation of free carriers what results in increasing the OH radicals formation on the photocatalyst surface. Calcination of the photocatalysts causes growing of the anatase crystals and results in reduction of their BET surface area. This is beneficial for OH radicals formation on the surface of anatase crystals, however adsorption abilities of such prepared photocatalysts are lower. In that case some organic compounds like phenol, which undergoes decomposition mainly by OH radicals attack, can be efficiently decomposed with using these photocatalysts. In case of uncalcined samples, they have high BET surface area and they can quantatively adsorb some organic compounds such as Acid Red and humic acids. By combination of adsorption with photocatalytic activity of uncalcined samples fast decomposition of organic compounds was achieved due to their fast oxidation by the formed reactive species under both, UV and artificial solar light irradiations, however this activity was much more higher under UV light.
© 2016 by Walter de Gruyter Berlin/Boston
Articles in the same Issue
- Activity of TiO2 Photocatalyst Modified with H2WO4 for Degradation of Organic Compounds in Water
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Articles in the same Issue
- Activity of TiO2 Photocatalyst Modified with H2WO4 for Degradation of Organic Compounds in Water
- The Influence of Solution Composition on the Effectiveness of Degradation of Ibuprofen Sodium Salt in a Hybrid Photocatalysis – Membrane Distillation System
- Antifungal Effect of Titanium Dioxide, Indoor Light and the Photocatalytic Process in In Vitro Test on Different Media
- Influence of Contaminants on Arc Properties during Treatment of Polluted Soils in Electric Arc Plasma
- DDT-Contaminated Soil Treatment with Persulfate and Hydrogen Peroxide Utilizing Different Activation Aids and the Chemicals Combination with Biosurfactant
- Landfill Leachate Treatment by Fenton, Photo-Fenton Processes and their Modification
- The Technological Parameters of Hydrochlorination of Glycerol to Dichloropropanols
- Characterization of TiO2 Modified with Bimetallic Ag/Au Nanoparticles Obtained inMicroemulsion System
- Application of Fenton´s Reagent for Acrylic Dyeing Wastewater Decolorization, Organic Matter Reduction and Biodegradability Improvement
- Photocatalytic and Self-cleaning Properties of Titania Coatings Prepared by Inkjet Direct Patterning of a Reverse Micelles Sol-gel Composition
- Decomposition of Microcystis aeruginosa and Microcystin-LR by TiO2 Oxidation Using Artificial UV Light or Natural Sunlight
- Application of Fenton and Solar Photo-Fenton Processes to the Treatment of a Sanitary Landfill Leachate in a Pilot Plant with CPCs
- Raschig Rings Based on Pillared Clays: Efficient Reusable Catalysts for Oxidation of Phenol
- Assessing the Effect of Inorganic Anions on TiO2-Photocatalysis and Ozone Oxidation Treatment Efficiencies
- Heterogeneous Catalytic Supercritical Water Oxidation of Refractory Organic Pollutants in Industrial Wastewaters
- Photodegradation of p-cresol in Aqueous Mn(1%)-Doped ZnO Suspensions
- CFD Modeling of Fixed Photocatalytic Inserts for a Continuous Flow Reactor for Water Disinfection
- Simulation of Simultaneous Removal of SO2 and NO Using Pulsed Discharge
- Congo Red Degradation in Anode and Sunlight/derivative Persulfate Composite Oxidation System
- Photocatalytic Degradation of Acephate on ZnFe2O4-TiO2 Photocatalyst under Visible-Light Irradiation
- Decolorization of Methyl Orange Solution with Potassium Bromate under UV Irradiation
- Utilization of Ozone Based Techniques for Industrial Effluents Depuration and Reuse
- Hydrogen Peroxide Generation by DC and Pulsed Underwater Discharge in Air Bubbles
- Silver and Phosphate Functionalized Reactive TiO2/Polymer Composite Films for Destructions of Resistent Bacteria Using Visible Light
- Treatment of Composted Soils contaminated with Petroleum Hydrocarbons using Chemical Oxidation followed by Enhanced Aerobic Bioremediation
