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Date of Publication:2022-10-10

Journal:高等学校化学学报

Volume:30

Issue:3

Page Number:539-543

ISSN No.:0251-0790

Abstract:Photo-degradation and gas-phase photocatalytic degradation on TiO2, of trichloroethy-lene were studied 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.

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