PHOTOOXIDATIVE DEGRADATION OF THE PESTICIDE PERMETHRIN CATALYZED BY IRRADIATED TIO2 SEMICONDUCTOR SLURRIES IN AQUEOUS-MEDIA
PHOTOOXIDATIVE DEGRADATION OF THE PESTICIDE PERMETHRIN CATALYZED BY IRRADIATED TIO2 SEMICONDUCTOR SLURRIES IN AQUEOUS-MEDIA
复制标题
DOI：
10.1016/1010-6030(92)85111-7
复制
发表时间：
1992-03-31
影响因子：
4.3
通讯作者：
PELIZZETTI, E
中科院分区：
文献类型：
--
作者：
HIDAKA, H;NOHARA, K;PELIZZETTI, E
有机氯农药氯菊酯在TiO_2半导体催化剂作用下可光降解为Cl ~-和CO_2。氯菊酯中的芳香族部分很容易通过表观一级动力学近似裂解。芳环开环速率（1.73 × 10（-3）min-1）与脱氯速率（1.82 × 10（-3）min-1）几乎相同。TiO 2催化剂、UV照射和氧气的存在对于以合理的速率进行光氧化是必不可少的。不溶性氯菊酯（在水中）可以有效地光降解的己烷-水混合物的TiO 2浆料在阳光照射下的高转化率（90%以上），即使在高浓度（17 000 ppm），在8小时内，在晴天。用辛基三甲氧基硅烷改性的疏水TiO 2催化剂（T-805）比裸TiO 2（P-25）具有更好的光催化活性。
The organochlorine pesticide permethrin can be photodegraded into Cl- and CO2 with TiO2 semiconductor catalyst. The aromatic moiety in permethrin is easily cleaved approximately via apparent first-order kinetics. The aromatic ring opening rate (1.73 x 10(-3) min-1) is nearly identical with the dechlorination rate (1.82 x 10(-3) min-1). The presence of the TiO2 catalyst, UV irradiation and oxygen gas are essential for photo-oxidation at a reasonable rate. The insoluble permethrin (in water) can be efficiently photodegraded in a TiO2 slurry of hexane-water mixture under solar exposure with high conversion (more than 90%), even at high concentration (17 000 ppm), in 8 h on a sunny day. The hydrophobic TiO2 catalyst (T-805) modified by octyltrimethoxyl silane gives more effective photocatalytic activity than the naked TiO2 (P-25).