Influence of Rare Earth Co-dopant on the Photocatalytic Property of TiO_2 Nano-particles

作     者：徐晓虹 XU Xiaohong,FANG Binzheng,ZHANG Fengyi,TIAN Yue,WU Jianfeng School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China

作者机构：School of Materials Science and EngineeringWuhan University of Technology 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2010年第25卷第3期

页      面：370-374页

核心收录：

学科分类：081704[工学-应用化学] 081705[工学-工业催化] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 070301[理学-无机化学] 

基　　金：Funded by the 11th Five-Year National Key Technology R&D Program(No.2008BAC41B00) 

主　　题：nano-TiO2 rare earth co-doped photocatalytic degradation sol-gel method 

摘      要：A series of nanometer TiO2 photocatalysts co-doped respectively with rare earth Er^3＋-Ce^3＋ and La^3＋-Fe^3＋ were prepared by sol-gel method,and the photocatalytic activity under ultra-violet light was evaluated by photocatalytic degradation of methyl *** crystallographic forms,particles size,and morphology were characterized by XRD and *** results showed that the optimum heat temperature of co-doped TiO2 was 550 ℃,and the co-doped TiO2 kept *** anatase crystal had the average size of 20 *** co-doping caused red-shift of the UV-Vis absorption spectra and enhanced the absorption of *** with the spectrum of pure TiO2 photocatalysts,the red-shift of Er^3＋-Ce^3＋ co-doping and La^3＋-Fe^3＋ co-doping catalysts was 53 nm and 34 nm,*** co-doping amount for Er^3＋-Ce^3＋ was n（Er^3＋）：n（TiO2）=0.1%,n（Ce^3＋）：（TiO2）= 0.05% and La^3＋-Fe^3＋ was n（La^3＋）：n（TiO2）=0.05%,n（Fe^3＋）：（TiO2）=0.5%.Under the condition the photocatalysis properties of the samples can be *** was found that the catalytic activity correlated well with the *** degradation rate of methyl blue examined at two hour of the reaction was 92.37%,and the better photocatalysis properties than the non-doped TiO2 were *** co-doped photocatalyst on methyl blue degradation follows the apparent first-order kinetics.