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Solar light-activated photocatalytic degradation of gas phase diethylsulfide on WO3-modified TiO2 nanotubes

Paper ID Volume ID Publish Year Pages File Format Full-Text
46216 46435 2013 13 PDF Available
Title
Solar light-activated photocatalytic degradation of gas phase diethylsulfide on WO3-modified TiO2 nanotubes
Abstract

Artificial solar light responsive high surface area WO3-modified TiO2 nanotubes have been efficiently used for performing the gas phase photocatalytic degradation of diethylsulfide, taken as simulant for the live yperite Chemical Warfare blister Agent, known as mustard gas. They were prepared by impregnating hydrothermally-synthesized titanate nanotubes with tungstate salt prior to the final calcination step. The influence of the WO3 content, the inlet diethylsulfide concentration and the relative humidity on the photocatalytic activity as a function of time on stream has been investigated in terms of DES removal efficiency and of deactivation behavior. Modification of TiO2 nanotubes with 4 wt.% of WO3 enhanced the photocatalytic activity in terms of DES removal efficiency and of resistance to sulfate deactivation. Correlation between the surface species and the on-stream activity and behavior of the photocatalysts was proposed, as well as possible reaction mechanism pathways.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► We synthetized solar light responsive high surface area WO3-modified TiO2 nanotubes. ► We prepared TiO2 nanotubes using hydrothermal synthesis in concentrated NaOH. ► WO3/TiO2 nanotubes exhibited high activity for degradation of diethylsulfide.► Correlation between surface species and the on-stream activity and deactivation. ► We proposed possible reaction mechanism pathways.

Keywords
Photocatalysis; TiO2 nanotubes; Hydrothermal synthesis; WO3 modification; Diethylsulfide elimination
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Solar light-activated photocatalytic degradation of gas phase diethylsulfide on WO3-modified TiO2 nanotubes
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis B: Environmental - Volumes 138–139, 17 July 2013, Pages 128–140
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
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Price was $35.95
You save - $31
Price after discount Only $4.95
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Full-text PDF Download
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