光电协同催化降解水杨酸和苯胺:二氧化钛晶型的影响  

Photoelectrocatalytic degradation of salicylic acid and aniline: effect of titanium dioxide crystal form

作　　者：倪珺[1] 冷文华[1] 施晶莹[1] 张鉴清[1] 曹楚南[1] 

机构地区：[1]浙江大学玉泉校区化学系,杭州310027

出　　处：《环境科学学报》2005年第6期756-760,共5页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金 (No .2 0 10 70 0 6)~~

摘　　要：以水中水杨酸和苯胺为氧化降解对象,采用光电催化方法,对比研究了其在锐钛型和金红石型2种TiO2 薄膜电极上的降解行为.结果表明:1) 2种有机物在锐钛型电极上的降解速率大于在金红石型TiO2 上的.2 )相同条件下,水杨酸在2种电极上的降解速率差别不如苯胺的明显;偏压增高时两种电极的光电催化活性逐渐缩小.3 )金红石型TiO2 电极具有较高的光电转换效率但其法拉第电流效率较低.A comparison of photoelectrocatalytic degradation of salicylic acid and aniline on anatase and rutile TiO_2/Ti photoanodes, was investigated. The results showed that the photooxidation rates of the two organics over anatase photoelectrode were larger than that at rutile photoelectrode, but this difference for the photodegradation of salicylic acid in rate was smaller than aniline. The difference of the photoelectrocatalytic activities between two electrodes were reduced under applied the bias potential high enough. And the rutile TiO_2 electrode had good conversion efficiency for light to electricity, but the faradaic efficiency was lower compared with the anatase electrode

关 键 词：光电催化 二氧化钛 晶型 水杨酸 苯胺 法拉第电流效率 

分 类 号：X703.5[环境科学与工程—环境工程]