附载型复合光催化剂TiO_2·SiO_2/beads降解有机磷农药  

Photocatalytic degradation of organophosphorous pesticides using TiO_2·SiO_2 composite photocatalyst attached to hollow glass microbeads

作　　者：张新荣[1] 杨平[2] 赵梦月[2] 

机构地区：[1]哈尔滨工业大学应用化学系,哈尔滨150001 [2]郑州工业大学化工学院,郑州450002

出　　处：《环境污染与防治》2002年第4期196-198,共3页Environmental Pollution & Control

基　　金：国家科委重点科技攻关资助项目 ( 92 0 - 0 5- 0 2 )

摘　　要：研究以四异丙醇钛 [Ti( iso- O C3 H7) 4]、硅酸乙酯为原料 ,以空心玻璃微球为载体 ,用溶胶—凝胶法制备可漂浮附载型复合光催化剂 Ti O2 · Si O2 / beads的过程 ,利用附载型复合光催化剂降解有机磷农药。结果表明 ,复合型光催化剂 Ti O2 · Si O2 摩尔比存在最佳值 ,n ( Ti O2 ) / m ( Si O2 ) =30 / 70时 ,光催化剂活性最高 ,其活性是同样降解条件下、同样含量 Degussa P- 2 5Ti O2 的 2倍左右。该光催化剂比表面大 ,吸附性强。并用 XRD和The preparation of TiO\-2\5SiO\-2 composite photocatalyst attached to the hollow glass microbeads surface by sol\|gel technique using titanium tetraisopropxide \[Ti(iso\|OC\-3H\-7)\-4\] and tetraethoxysilane as materials were studied. The photocatalytic degradation of organophosphorous pesticides were investigated. The results show that composite photocatalyst TiO\-2\5SiO\-2 mole ratios have the best value. A ratio of 30/70 produces a catalyst about 2 times active than degussa P\|25 TiO\-2. Moreover, photocatalysts have large surface area and strong adsorption. Composite photocatalysts are characterized by XRD and SEM.\;

关 键 词：附载型 TiO2·SiO2/beads 降解 有机磷农药 复合型光催化剂 玻璃微球 农药 废水处理 

分 类 号：X703[环境科学与工程—环境工程]