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Photocatalytic degradation with combustion synthesized WO3 and WO3-TiO2 mixed oxides under UV and visible light

Singh, Satyapaul A and Madras, Giridhar (2013) Photocatalytic degradation with combustion synthesized WO3 and WO3-TiO2 mixed oxides under UV and visible light. In: SEPARATION AND PURIFICATION TECHNOLOGY, 105 . pp. 79-89.

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Official URL: http://dx.doi.org/10.1016/j.seppur.2012.12.010

Abstract

The photocatalytic activity of commercial titanium dioxide under UV and visible radiation was improved by composites of tungsten trioxide (WO3) with TiO2. WO3 was prepared by solution combustion synthesis and the mixed oxides/composites of WO3-TiO2 were prepared in different weight ratios (0, 0.10, 0.15, 0.20, 0.25, 0.50, 0.75, and 1) by physical mixing. These catalysts were characterized by XRD, DRS, BET, SEM, TEM, pH drift method, TGA and photoluminescence. The photocatalytic activity varies with the WO3 loading in the composites. The optimum loading of WO3 in the composites was found to be 15 wt% for both UV and visible radiation. This loading showed faster dye degradation rate than commercial TiO2 (TiO2-C) and WO3 (WO3-C). The effect of initial concentrations of methylene blue (MB) and orange G (OG) and the effect of the functional group on dye degradation was studied with both anionic and cationic dyes with 15 wt% WO3-TiO2. (C) 2012 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copyright for this article belongs to ELSEVIER SCIENCE BV, NETHERLANDS.
Keywords: Tungsten trioxide;Mixed oxides/composites;Photocatalysis;Anionic and cationic dyes;Solution combustion synthesis
Department/Centre: Division of Mechanical Sciences > Chemical Engineering
Depositing User: Francis Jayakanth
Date Deposited: 18 Mar 2013 05:36
Last Modified: 18 Mar 2013 05:36
URI: http://eprints.iisc.ac.in/id/eprint/46069

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