一维TiO2纳米管光催化降解气相苯的动力学研究

人工晶体学报 ›› 2020, Vol. 49 ›› Issue (12): 2308-2312.

一维TiO₂纳米管光催化降解气相苯的动力学研究

杜晶晶¹, 赵军伟², 程晓民¹, 施飞¹

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

出版日期:2020-12-15 发布日期:2021-01-25
通信作者: 赵军伟,博士,副教授。E-mail:keivin5208@163.com
作者简介:杜晶晶(1983—),女,河南省人,博士,副教授。E-mail:nbninggong@163.com
基金资助:
国家自然科学基金(51275251)

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

DU Jingjing¹, ZHAO Junwei², CHENG Xiaomin¹, SHI Fei¹

1. School of Mechanical Engineering, Ningbo University of Technology, Ningbo 315016, China;
2. School of Materials and Chemical Engineering, Ningbo University of Technology, Ningbo 315016, China

Online:2020-12-15 Published:2021-01-25

摘要/Abstract

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 cm²,苯的初始浓度为480 mg/m³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=0.003 8C_t/(1+0.587C_t)。

关键词: 一维结构, TiO₂纳米管, 水热法, 光催化, 气相苯, 动力学

Abstract: 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 cm², and the initial concentration of benzene is 480 mg/m³, 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=0.003 8C_t/(1+0.587C_t).

Key words: one-dimensional structure, TiO₂ nanotube, hydrothermal method, photocatalysis, gaseous benzene, kinetic

中图分类号:

O643

杜晶晶, 赵军伟, 程晓民, 施飞. 一维TiO₂纳米管光催化降解气相苯的动力学研究[J]. 人工晶体学报, 2020, 49(12): 2308-2312.

DU Jingjing, ZHAO Junwei, CHENG Xiaomin, SHI Fei. Kinetic of Photocatalytic Degradation of Gaseous Benzene by One-Dimensional TiO₂ Nanotubes[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2020, 49(12): 2308-2312.

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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

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