二氧化钌对硫化镉超微粒体系界面电子转移及光反应的催化与阻催化作用

用ESR方法研究了二氧化钌对硫化镉超微粒子界面光诱导电子转移及光催化性能的影响, 结果表明, 与单一的硫化镉胶粒体系的作用不同, 在二氧化钌的存在下的CdS/RuO₂体系, 可对某些底物体系的光反应有明显的增强催化的作用, 而对另一些体系则产生抑制或负催化的作用. 此复合体系的协同作用也与单纯二氧化钌的催化作用有所不同, 故复合体系更有利于界面光反应过程与方向的控制.

THE PROMOTION CATALYSIS AND NEGATIVE CATALYSIS OF RuO2 ON THE INTERFACIAL PHOTOREACTION IN SUPERFINE CdS PARTICLE SYSTEM

The influence of ruthenium dioxide on the photoinduced electron transfer and photocatalysis character for cadmium sulfide superfine particle system by means of ESR method. Results show that it is obviously different from the case of single CdS colloid system, in the presence of ruthenium dioxide, CdS/RuO\-2 binary system can effectly enhance photocatalysis reactions of some substrates; but for other substrates, their interfacial photoreactions may be prohibited obviously or completely, namely, RuO\-2 plays a role of negative catalysis. Therefore, under different conditions, the promotion and negative catalysis characters of the CdS/RuO\-2 binary system are conducive to control and regulation for the interfacial photoreaction processes.