关键词: 硫化镉, 水, 光氧化, 苯甲醇 P, 光催化, 过氧化氢, 猝灭效应, 甲基紫精

The photocatalytic reaction of benzhydrol on CdS in MeCN was studied. It was found that O, H2O, H2O2, Me viologen, which can scavenge an electron from the conduction band of a semiconductor, initiated or promoted the reaction. The reaction was quenched completely by a radical quencher. The photocatalytic feature of CdS is revealed and the mechanism discussed. There are 2 distinct processes in the photocatalytic reactions, a heterogeneous process on the surface of the catalyst, which initiates the reaction, and a homogeneous process in the solution which propagates the reaction.

Key words: CADMIUM SULFIDE, WATER, PHOTOOXIDATION, BENZALCOHOL P, PHOTOCATALYSIS, HYDROGEN PEROXIDE, QUENCHING EFFECTS, METHYL VIOLOGEN