纳米Bi_2O_3/TiO_2光催化剂的制备及光催化活性评价  

The Study of Preparation and Characteristic of Bi_2O_3/TiO_2 Coupled Photocatalyst

作　　者：雷建[1] 陈华军[1] 施万胜[1] 

机构地区：[1]洛阳理工学院,河南洛阳471023

出　　处：《信阳师范学院学报（自然科学版）》2010年第4期562-565,共4页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：河南省教育厅自然科学基金项目(2008A430014)

摘　　要：在超声波作用下采用水解法制备Bi2O3/TiO2复合光催化剂,以紫外灯为光源,对有机染料进行光催化降解实验,考察Bi2O3/TiO2的光催化性能.结果表明:Bi2O3与TiO2复合拓宽了催化剂对光的吸收范围,提高了TiO2的光催化活性,掺杂量(Bi2O3)为0.25%(w)复合光催化剂催化活性最高.考察了催化剂投加量、染料初始浓度、溶液pH值等因素对罗丹明B降解效果的影响,降解反应遵从假一级动力学模型,测得反应速率常数为0.0574min-1.Bi2O3/TiO2 coupled photocatalyst was prepared by the hydrolysis method in the presence of water and ethanol under ultrasonic irradiation.The photocatalytic activity of the catalyst was determinated by measuring the degradation rate of rhodamine B under irradiation of UV-lamp.The results showed that adding Bi2O3 to TiO2 broadened the absorb range of solar light and greatly enhanced photocatalytic activity of TiO2,and the optimum loading of Bi2O3 was 0.25%.The various conditions including the dose of titanium oxide,the concentration of rhodamine B,the value of pH and various ion and H2O2 had different influence on degradation of rhodamine B.The photocatalytic degradation of rhodamine B follows the pseudo first-order kinetic model,and the reaction rate constant（0.057 4 min-1）was determined.

关 键 词：超声波 二氧化钛 三氧化二铋 降解 罗丹明B 

分 类 号：O614[理学—无机化学]