载银TiO_2半导体催化剂降解染料水溶液的研究  

Study on the photodegradation of Dyes in Aqueous Solution over a Ag-loaded TiO_2 Catalyst

作　　者：蒋伟川[1,2] 谭湘萍 

机构地区：[1]浙江大学化学系 [2]浙江省环境保护科学研究所

出　　处：《环境科学》1995年第2期15-18,共4页Environmental Science

基　　金：国家自然科学基金

摘　　要：以新型载银ＴｉＯ２为催化剂，采用高压汞灯为光源对染料水溶液进行光催化降解、实验结果表明。采用ＴｉＯ２催化剂使直接耐酸大红（３５ｍｇ／Ｌ）．直接耐晒翠蓝（５０ｍｇ／Ｌ）和直接黑（５０ｍｇ／Ｌ）染料溶液脱至无色的时间分别为３５ｍｉｎ、６０ｍｉｎ及６０ｍｉｎ，而采用载银ＴｉＯ２催化剂，上述染料溶液脱至无色的时间分别为２０ｍｉｎ、３０ｍｉｎ及２０ｍｉｎ。探讨了ｐＨ、光强、催化剂用量及灼烧温度等对催化降解的影响。Photodegradation of dyes in aqueous solution wasinvestigated by irradiating with a 300 watts highpressure mercury lamp and using silver loaded titanium as a catalyst. The results show that theAg loaded TiO2 had a higher catalytic activitythan a pure TiO2. An aqueous solution containing50 mg/L of dye could be decoloured over a Agloaded TiO2 catalyst with a 40- 60 min irradiation, which was 15-40 min less than that in thecase of using a pure TiO2 as a catalyst. The effects of tempreture,pH, photo-intensity andquantity of catalyst agent were also investigated.

关 键 词：载银催化剂 染料 光催化 废水处理 降解 

分 类 号：X791.03[环境科学与工程—环境工程]