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Received June 1, 2009
Accepted August 19, 2009
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Photocatalytic removal of methyl orange in an aqueous solution by a WO3/TiO2 composite film
State Key Lab of Material Processing and Dies & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
Korean Journal of Chemical Engineering, February 2010, 27(2), 435-438(4), 10.1007/s11814-010-0080-3
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Abstract
WO3/TiO2 composite film was prepared by microarc oxidation technique and characterized by SEM, XRD, UV-vis spectra and Zeta-potential. The photocatalytic activity of WO3/TiO2 composite film was evaluated by examining the degradation of methyl orange. The influence of solution pH and inorganic anions on removal ratio of methyl orange was investigated. Removal ratio of methyl orange decreased with an increase of pH value in acidic solution, while it increased with the pH value in alkaline solution. The influence of added anions on the removal ratio is divided into_x000D_
two aspects. Addition of Cl^(-) and SO4^(2-) resulted in a decrease in photocatalytic removal ratio of methyl orange, while it was facilitated by PO4^(3-), HCO3^(-) and NO3^(-).
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