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Lowering of photocatalytic activity of TiO2 particles during oxidative decomposition of benzene in aerated liquid

Paper ID Volume ID Publish Year Pages File Format Full-Text
47432 46471 2010 6 PDF Available
Title
Lowering of photocatalytic activity of TiO2 particles during oxidative decomposition of benzene in aerated liquid
Abstract

TiO2-photocatalyzed reaction was conducted in pure benzene in which TiO2 particles were suspended. Benzene was oxidatively decomposed into CO2, as most of organic compounds. However, the rate of CO2 evolution from benzene was gradually lowered as the reaction continued, which was in contrast to the cases of other non-aromatic organic compounds, such as alcohols or acids. To clarify the reason for the decrease in activity of TiO2, intermediates produced in the solution phase and on the surface of TiO2 were analyzed using chemical and physical techniques. Several kinds of intermediates were identified: phenolic compounds, aldehydes, carboxylic acids, and polymeric substance. Of these products, catechol and polymeric substance, which were observed only on the surface of TiO2 powder, were found to be responsible for the lowering of the photocatalytic activity of TiO2.

Keywords
TiO2; Benzene; Catechol; Polymer; Deactivation
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Lowering of photocatalytic activity of TiO2 particles during oxidative decomposition of benzene in aerated liquid
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volume 94, Issues 1–2, 1 February 2010, Pages 186–191
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us