贵金属对TiO_2悬浮液光照过程中H_2O_2形成的促进作用  

THE EFFECT OF NOBLE METAL ON THE GENERATION OF H2O2 IN THE TiO2 AQUEOUS SUSPENSION DURING ILLUMINATION

作　　者：姚晓斌 马颖[2] 姚建年[2] 

机构地区：[1]甘糟化学产业株式会社化工研究所 [2]中国科学院感光化学研究所

出　　处：《感光科学与光化学》1999年第2期159-163,共5页Photographic Science and Photochemistry

摘　　要：众所周知，ＴｉＯ２是一种能进行光能化学能转换的半导体材料．７０年代初期，日本的Ｆｕｊｉｓｈｉｍａ等人［１］发现ＴｉＯ２电极能利用光能将水分解为氢气和氧气．从此，ＴｉＯ２作为光能转换材料，在太阳能利用，环境保护，卫生医疗等许多领域逐渐引起研究人员的注...The effect of Ag+ and Pd2+ ion on the generation of H2O2 in the TiO2 aqueous suspension were studied and compared with the surface modification of TiO2 with Ag and Pd. The production of H2O2 under ultraviolet illumination was greatly enhanced after such noble metals were added. This effect was due to the inhibiting of recombination of electrons and holes by noble metal atoms adsorbed on TiO2 surface. But the amount of H2O2 generated in Pd2+/TiO2 aqueous suspension was not as large as that in Pd/TiO2 system during the first ten minutes of illumination. The slow reduction of Pd2+ under ultraviolet illumination to Pd leads to such results.

关 键 词：修饰 二氧化钛 水 氧 光催化剂 过氧化氢 

分 类 号：O613.3[理学—无机化学] O643.36[理学—化学]