La掺杂纳米TiO2光催化降解TNT的动力学  

Kinetics of La-doped Nanometer TiO2 Photocatalytic Degradation of TNT

作　　者：胡相红[1] 陈勇[2] 谷科成[2] 陈逸[2] 袁馨[2] 张恒[2] 

机构地区：[1]武警北京指挥学院实验中心,北京100012 [2]后勤工程学院营房管理与环境工程系,重庆401311

出　　处：《后勤工程学院学报》2010年第4期29-34,共6页Journal of Logistical Engineering University

基　　金：重庆市自然科学基金资助项目(CSTC,2008BB7139)

摘　　要：以掺杂La的纳米TiO2作光催化剂，研究了光催化降解TNT的动力学规律，考察了TNT初始质量浓度、催化剂用量、初始pH、通氧速率及光照强度等因素对TNT光催化降解的影响。试验结果表明：在不同初始质量浓度、初始pH、通氧速率、光照强度及催化剂用量为0．3～2．0g／L的条件下，TNT光催化降解反应遵循拟一级动力学规律，且可用Langmuir-Hinshelwood动力学模型描述；当催化剂用量为0．1g／L时，该反应可认为是震缀反应．In order to investigate the kinetic rules on the photocatalytic degradation of TNT,La-doped nanometer TiO2 is used as a photocatalyst. Then the effects of various factors such as the initial TNT concentration, catalyst dosage, flow rate of oxygen, the initial pH and intensity of light irradiation on the photocatalytic degradation of TNT are examined. Experiment results show that the reaction obeys pseudo first-order kinetics and is represented by the Langmuir-Hinshelwood model when the reaction takes place at dif- ferent initial concentration,flow rate of oxygen,the initial pH,intensity of light irradiation and the catalyst dosage is 0.3 - 2.0 g/L. When the catalyst dosage is 0.1 g/L, the reaction is regarded as the zero one.

关 键 词：LA掺杂 TIO2 光催化 TNT 动力学 

分 类 号：O643.322[理学—物理化学]