纳米TiO_2-UV光催化降解乙酰甲胺磷影响因素的研究  

Photocatalytic degradation of acephate by UV TiO_2 process-influence of operating parameters

作　　者：殷晓梅[1] 王欣[1] 王金翠[1] 杜银花[1] 刘宝林[1] 

机构地区：[1]上海理工大学食品质量与安全研究所,上海200093

出　　处：《应用化工》2012年第9期1508-1512,共5页Applied Chemical Industry

基　　金：上海市自然基金项目(10ZR1420700);上海市研究生创新基金项目(JWCXSL1022)

摘　　要：考察了UV-纳米TiO2光催化降解乙酰甲胺磷的可行性,就高压汞灯照射时间及照射方式、催化剂种类及用量、pH值、反应温度、乙酰甲胺磷初始浓度等对光催化降解效率的影响进行了研究,并探索了催化剂的重复利用。结果表明,当添加0.1 g/L的纳米TiO2(德国P25),乙酰甲胺磷的起始浓度为20 mg/L,温度控制在25℃,反应体系的pH为11时,以高压汞灯持续照射80 min,即可实现对乙酰甲胺磷99.9%的光催化降解。The photocatalytic degradation feasibility of acephate, an organophosphorous pesticide, by UV TiO2 process was investigated. The effects of radiation mode and duration,TiO2 type and concentration,in- itial aeephate concentration, temperature and initial pH value on the photodegradation efficiency have been examined. The photocatalytic effect was more efficient when the initial acephate concentration was 20 mg/L and in a suspension containing 0. 1 g/L Degussa P25 TiO2, while keeping the reaction solution at 25 ℃ and continuously irradiated for 80 rain to realized the photocatalytic degradation of the aeephate 99.9%. It seems that an alkaline solution （ pH = 11 ） could improve the photodegradation efficiency of acephate.

关 键 词：乙酰甲胺磷 光催化降解 纳米TIO2 

分 类 号：TQ450.9[化学工程—农药化工] O644.19[理学—物理化学]