TiO_2光催化剂表面载铂方法的研究  

A STUDY ON THE METHOD OF LOADING PLATINUM ON TiO_2 PHOTOCATALYST

作　　者：蔡乃才[1] 简翠英[1] 董庆华[1] 

机构地区：[1]武汉大学化学系

出　　处：《Chinese Journal of Catalysis》1989年第2期137-142,共6页催化学报（英文）

摘　　要：比较了两种载铂方法。用光浸渍与氢还原联合的方法可得到铂含量较高、铂分布较均匀和催化活性较好的Pt/TiO_2光催化剂。采用电化学方法研究了TiO_2粉末表面联合法载铂的机理。The method of loading platinum on TiO2 for the preparation of photocatalyst by combined photo-infusion and reduction wilh hydrogen was studied. The ca-alytic activity for the decomposition of organic carboxylic acids of the catalyst prepared by the combined method was higher than that by photoelectro-chcmical method. The mechanism of loading platinum on TiO2 was studied by electrochemical method. The results showed that in the presence of TiO2 powder, PtCl62- ions were partially reduced to metallic Pt and partiality reduced to some lower valence state ions which photo-adsorbed uniformly on the surface of TiO2 particles under illumination. In consequence of the photo-adsorbed lower valence state ions reduced by hydrogen, a Pt/TiO2 catalyst with highly dispersed and higher load of platinum was obtained.

关 键 词：PT/TIO2 光催化剂 制备 

分 类 号：TQ426.64[化学工程]