以网状铱钽钛电极为阳极、石墨板为阴极、饱和甘汞电极为参比电极,设计一种在线生成H2O2的电化学反应器,并以锐钛矿、金红石及混晶TiO2(TiO2-P25)为光催化剂,研究TiO2光催化学协同电化学催化降解扑草净的过程.结果表明:电生H2O2能协助TiO2可见光催化降解扑草净,反应300min后,扑草净降解率达到100％;在扑草净的降解过程中,外层的甲基、硫基及氨基被氧化脱除,降解过程生成多种中间产物,降解终产物为三聚氰酸,总有机碳的去除率为60％～70％.对反应体系的光谱分析显示:扑草净的降解涉及羟基自由基(·OH)及超氧自由基(·O2-)的产生和参与.
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