Photocatalytic degradation of chlorinated ethenes
Kyoichi OkiGraduate School of Science and Technology, Shinshu UniversitySachiko TsuchidaGraduate School of Science and Technology, Shinshu UniversityHiromasa NishikioriDepartment of Environmental Science and Technology, Faculty of Engineering, Shinshu University, 4-17-1 WakasatoNobuaki TanakaDepartment of Environmental Science and Technology, Faculty of Engineering, Shinshu University, 4-17-1 WakasatoTsuneo FujiiDepartment of Environmental Science and Technology, Faculty of Engineering, Shinshu University, 4-17-1 Wakasato
2003en
ABI
Abstract
Degradation of three chlorinated ethenes, trichloroethylene, trans‐1,2‐dichloroethylene and cis‐1,2‐dichloroethylene, by UV‐light irradiated TiO 2 catalyst prepared by the sol‐gel method in dry air at ambient temperature have been examined by using FTIR measurement. The chlorinated ethenes rapidly decomposed to produce dichloroacethyl chloride, CO, HCl, and COCL 2 . For trans‐ and cis‐1,2‐DCE systems isomerization to each other is found to be the first step of the degradation. The C = C bond of the chlorinated ethenes interacts directly with TiO 2 site and, consequently, the degradation results in several products on the catalyst surface in these systems.
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