Fe、C包覆金红石型TiO_2可见光催化H_2O_2降解阿特拉津的研究

Photocatalystic Degradation of Atrazine by H_2O_2 with Rutile TiO_2 Coated by Iron and Carbon under Visible Irradiation

以Fe、C包覆金红石型TiO2(Fe-C-R)为光催化剂,以阿特拉津作模型污染物,研究了Fe-C-R可见光催化H2O2降解阿特拉津的反应特性。表明Fe-C-R能可见光催化H2O2降解阿特拉津,反应45 min,阿特拉津的降解率达98%;通过对反应体系的荧光光谱分析显示,阿特拉津的降解涉及羟基自由基(·OH)的产生与参与,并且与单纯的金红石型TiO2(R)降解阿特拉津的反应机理是不同的。

The characteristics of degradation of atrazine by H202 under visible irradiation were studied using rutile TiO2 coated by iron and carbon as photocatalyst and atrazine as model pollutant. The photoeatalytic tests indicate that atrazine can be photocatalytic degraded under visible--light with the addition of H202 by rutile TiO2 coated by iron and carbon and its degradation ratio can be up to 98% after 45 min reaction. Fluorescence spectrum analysis indi- cates that the reaction process is predominated by the generation of · OH radicals in the system, and the reaction mechanism of degradating atrazine is different from rutile TiO2.