金属掺杂锐钛矿型TiO_2光催化氧化水中As(Ⅲ)的试验研究  

Photocatalytic Oxidation of As(Ⅲ)in Aqueous Suspensions Using Metal Doped Anatase TiO2

作　　者：魏志钢[1] 方杨飞 刘月[1] 李随亮[1] 汤丽娴 陈耀祖[1] 蓝天让 潘湛昌[1] 胡光辉[1] 

机构地区：[1]广东工业大学轻工化工学院,广东广州510006

出　　处：《安全与环境工程》2017年第4期69-73,共5页Safety and Environmental Engineering

基　　金：国家自然科学基金项目(20803014);广东工业大学博士启动基金项目(253151020)

摘　　要：对不同掺杂比例的3d过渡金属和稀土掺杂的TiO_2对水中三价砷离子[As(Ⅲ)]的光催化氧化效果进行试验。结果表明:Yb^(3+)以0.8%的掺杂比例掺杂锐钛矿[Yb_(0.8%)/TiO_2]的光催化氧化能力最强,且Zn_(0.1%)/TiO_2、La_(0.3%)/TiO_2、Tb_(0.5%)/TiO_2和Dy_(0.1%)/TiO_2的光催化氧化能力都比纯TiO_2强;pH值对Yb_(0.8%)/TiO_2的光催化氧化反应的影响不明显;Yb_(0.8%)/TiO_2的光催化氧化反应表现为假零级反应动力学。正交试验表明:[光]、[Yb_(0.8%)/TiO_2]、[Yb_(0.8%)/TiO_2]×[光]和[As(Ⅲ)]对试验效果的影响显著,是光催化氧化反应的主要影响因素。This paper tests the catalytic effect of 3d transition metal and rare earth doped TiO2 with different doping ratios photocatalytic oxidation （PCO） of arsenite／[As（Ⅲ）／].The results show that the Yb3＋doped anatase with the doping ratio of 0.8% ／[Yb0.8%/TiO2／] possesses the best PCO ability.In addition,Zn 0.1%/TiO2, La0.3%/TiO2,Tb0.5%/TiO2 and Dy0.1%/TiO2 also has better PCO abilities than that of pure TiO2.The pH effect of Yb0.8%/TiO2 is not significant and the PCO reaction is better described by the pseudo zeroorder kinetic law.At last,the study carries out the orthogonal L27（313） design to show that the light intensity,the concentration of TiO2,the interaction effect of light intensity and TiO2,and the concentration of As（Ⅲ） have significant effects on the experiment.

关 键 词：三价砷离子 TIO2 金属掺杂 光催化氧化 

分 类 号：X703.5[环境科学与工程—环境工程]