In situ FTIR Study on Photo-catalytic Degradation of Trichloroethylene over TiO2

Chem. J. Chinese Universities

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In situ FTIR Study on Photo-catalytic Degradation of Trichloroethylene over TiO2

JIANG Chuan-Rui1, ZHENG Chun-Li1, LI Xin-Yong1,2*, WANG Li-Yuan1, ZHANG Wen-Shuang1, CHEN Guo-Hua2

1. State Key Laboratory of Fine Chemical, Key Laboratory of Industrial Ecology and Environmental Engineering of Ministry of Education, School of Environmental & Biological Science & Technology, Dalian University of Technology, Dalian 116023, China;2. Department of Chemical Engineering, Hong Kong University of Science & Technology, Kowloon, Hong Kong, China)

Received:2008-07-03 Revised:1900-01-01 Online:2009-03-10 Published:2009-03-10
Contact: LI Xin-Yong

Abstract

Abstract: Photo-degradation and gas-phase photocatalytic degradation on TiO2 of trichloroethy-lene were stu-died by in situ infrared spectroscopy. The results show that UV/TiO2 has a higher degradation capacity than UV on trichloroethylene. In the photocatalytic degradation process, dichloroacetyl chloride, carbon dioxide, carbon monoxide, water, hydrogen chloride and phosgene were detected. Base on the in situ FTIR spectra in different stages, the reaction mechanism of trichloroethylene photocatalysis on TiO2 was proposed: trichloroethylene was oxidized by hydroxyl radical and other free radical and formed to dichloroacetyl chloride. Finally, dichloroacetyl chloride was converted further to carbon dioxide, carbon monoxide, water, hydrogen chloride and phosgene.

Key words: In situ FTIR, Photocatalysis, Trichloroethylene, TiO2

CLC Number:

O643.3

TrendMD:

JIANG Chuan-Rui1, ZHENG Chun-Li1, LI Xin-Yong1,2*, WANG Li-Yuan1, ZHANG Wen-Shuang1, CHEN Guo-Hua2. In situ FTIR Study on Photo-catalytic Degradation of Trichloroethylene over TiO2
[J]. Chem. J. Chinese Universities, doi: .

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In situ FTIR Study on Photo-catalytic Degradation of Trichloroethylene over TiO2

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