一维TiO2纳米管光催化降解气相苯的动力学研究  

Kinetic of Photocatalytic Degradation of Gaseous Benzene by One-Dimensional TiO2 Nanotubes

作　　者：杜晶晶[1] 赵军伟[2] 程晓民[1] 施飞[1] DU Jingjing;ZHAO Junwei;CHENG Xiaomin;SHI Fei(School of Mechanical Engineering,Ningbo University of Technology,Ningbo 315016,China;School of Materials and Chemical Engineering,Ningbo University of Technology,Ningbo 315016,China)

机构地区：[1]宁波工程学院机械工程学院,宁波315016 [2]宁波工程学院材料与化学工程学院,宁波315016

出　　处：《人工晶体学报》2020年第12期2308-2312,2321,共6页Journal of Synthetic Crystals

基　　金：国家自然科学基金(51275251)。

摘　　要：采用水热法制备出一维TiO2纳米管,并将其应用于光催化降解气相苯。探讨了TiO2用量、TiO2面积、苯的初始浓度等因素对光催化性能的影响,并研究其降解动力学规律。结果表明,催化剂用量为0.5 g,面积为180 cm^2,苯的初始浓度为480 mg/m^3时,苯的去除率最高可达66%。并且随着催化剂用量和面积的增加,气相苯的降解率均随之升高,但其影响却逐渐减弱。而气相苯的初始浓度对光催化降解率的影响较大,且其过程符合拟一级动力学规律,可用L-H模型描述,并确定其反应方程为r=0.0038 Ct/(1+0.587 Ct)。One-dimensional TiO2 nanotubes were prepared by hydrothermal method,and also applied to the photocatalytic degradation of gaseous benzene.The effects of the dosage of TiO2,the area of TiO2 and the initial concentration of benzene on the photocatalytic performance were discussed,and the degradation kinetics were investigated.The results show that when the catalyst dosage is 0.5 g,the area is 180 cm^2,and the initial concentration of benzene is 480 mg/m^3,the removal rate of benzene is up to 66%.Moreover,with the increase of catalyst dosage and area,the degradation rate of gaseous benzene increases,but the effect is gradually weakened.However,the initial concentration of gaseous benzene has a great influence on the photocatalytic degradation rate,and the process is in accord with the pseudo-first order kinetics law,which can be described by the L-H dynamic model,the kinetic equation of photocatalysis is established as r=0.0038 Ct/(1+0.587 Ct).

关 键 词：一维结构 TIO2纳米管 水热法 光催化 气相苯 动力学 

分 类 号：O643[理学—物理化学]