Ag和Pd及其离子对TiO_2光催化分解CH_3CHO的影响  

THE EFFECTS OF Ag, Pd AND Ag +, Pd 2+ ON PHOTODE GRADATION OF CH 3CHO CATALYZED BY TiO 2

作　　者：姚晓斌 马颖 姚建年[1,2] 

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1期12-16,共5页Photographic Science and Photochemistry

摘　　要：当用能量大于其禁带宽度的光照射通有氧气的ＴｉＯ２悬浮液时，在ＴｉＯ２微粒表面会产生反应活性很高的空穴和Ｏ２－、Ｈ２Ｏ２等多种活性氧．在上一篇文章中［１］我们已报道了在通氧气和紫外光照的条件下，向ＴｉＯ２悬浮液中加入少量Ａｇ＋或Ｐｄ２＋，将会大幅度提高...Photodegradation of CH 3CHO catalyzed by TiO 2 was accelerated after Ag + or Pd 2+ was added into TiO 2 aqueous suspension. Under nitrogen, Ag + and Pd 2+ only acted as electron acceptors to separate electron and hole well, while under oxygen, Ag + and Pd 2+ not only acted as electron acceptors but also increased H 2O 2 produced by illumination in the suspension. But photocatalytic activity of TiO 2 was only improved under oxygen after surface modification was used. Our results show that the concentration of H 2O 2 in the suspension has great effect on photodegradation of CH 3CHO assisted by TiO 2.

关 键 词：光催化 CH3CHO 银 钯 有机废水 二氧化钛 分解 

分 类 号：O643.36[理学—物理化学] X783.03[理学—化学]