光催化
敌敌畏
氧化剂
降级(电信)
杀虫剂
汞蒸气灯
化学
甲基对硫磷
环境化学
核化学
化学工程
材料科学
催化作用
有机化学
电信
光电子学
计算机科学
农学
生物
工程类
作者
Mengyue Zhao,Shifu Chen,Tao Yaowu
标识
DOI:10.1002/jctb.280640405
摘要
Abstract This paper studies the feasibility of photocatalytic degradation of organophosphorus pesticides using thin films of TiO 2 . The results show that 0·65 × 10 −4 mol dn −3 of dichlorvos, monocrotophos, phorate, parathion can be completely photocatalytically degraded into PO within a short time under illumination with a medium pressure mercury lamp of 375 W. The effect of parameters such as he amount of TiO 2 attached, initial concentration of organphosphorus pesticides, initial pH, amount of air flow, concentrations of H 2 O 2 and Fe 3+ on the photocatalytic degradation are studied. The possible mechanisms of photocatalytic degradation are discussed. It is our assumption that the degradation reactions occur on the surface of TiO 2 via primary produced oxidizing species such as the OH radical and O , after 80 h illumination, there is no significant loss of the photocatalytic activity of TiO 2 .
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