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- W2487202454 abstract "The photoreductive degradation of CCl{sub 4} in TiO{sub 2} particulate suspensions in the presence of a variety of organic electron donors (alcohols, carboxylic acids, and benzene derivatives) has been examined. CHCl{sub 3}, C{sub 2}Cl{sub 4}, and C{sub 2}Cl{sub 6} are detected as intermediates during photolysis. The rate of CCl{sub 4} dechlorination can be enhanced significantly when alcohols and organic acids are used as electron donors. Kinetic isotope effects and structure-reactivity relationships show that hydrogen-abstraction by hydroxyl radicals plays an important role in the hole-scavenging mechanism. The pH of the TiO{sub 2} suspension influences the rate of CCl{sub 4} reduction either by altering the electrostatic interactions of electron donors on the TiO{sub 2} surface or by changing the reduction potential of the conduction band electron in a Nernstian fashion. Since dissolved oxygen is shown to be nonessential for the complete mineralization of CCl{sub 4}, a mechanism, which involves dichlorocarbene formation through a two-electron transfer, is proposed." @default.
- W2487202454 created "2016-08-23" @default.
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- W2487202454 date "1995-12-01" @default.
- W2487202454 modified "2023-09-26" @default.
- W2487202454 title "Photo-induced electron transfers to CCl{sub 4} and its degradation mechanism on TiO{sub 2} particles" @default.
- W2487202454 hasPublicationYear "1995" @default.
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