摘要
研究以四异丙醇钛［Ｔｉ（ｉｓｏ－ＯＣ３Ｈ７）４］异丙醇铝为原料，以空心玻璃微球为载体，用溶胶－凝胶法制备可飘浮附载型ＴｉＯ２·Ａｌ２Ｏ３／玻球复合光催化剂的过程，同时利用附载型复合光催化剂降解有机磷农药．结果表明：复合光催化剂ＴｉＯ２和Ａｌ２Ｏ３物质量比存在最佳值，ｎ（ＴｉＯ２）／ｎ（Ａｌ２Ｏ３）＝９７／３时，光催化活性最高，其活性是ＤｅｇｕｓａＰ－２５ＴｉＯ２的１．５倍，短时间内，可将低浓度有机磷农药完全降解．另外，焙烧时间和温度也是影响光催化活性的因素。
Abstract This paper studies the preparation of TiO 2·Al 2O 3 composite photocatalyst attached to the hollow glass microbeads surface by thermal decomposition and calcination of colloidal solution made from hydrolysis of titanium tetraiso propoxide [Ti(iso-OC 3H 7) 4] and triisopropyl orthoaluminate using sol-gel technique.The results show that composite photocatalyst TiO 2·Al 2O 3 ratios have the best value.A ratio of 97/3 produces a catalyst about 1.5 times more active than Degussa P-25 TiO 2.Within a short time,organophosphoros pesticides can be completely degraded into PO 4 3- .In addition,calcination temperature and thermal treatment time are also the primary factors which affect the photocatalytic activity.The phase is determined by XRD.
出处
《郑州工业大学学报》
1999年第1期39-41,共3页
Journal of Zhengzhou University of Technology
基金
国家科委重点科技攻关项目
