物理化学学报 >> 2011, Vol. 27 >> Issue (09): 2191-2199.doi: 10.3866/PKU.WHXB20110924

催化和表面科学 上一篇    下一篇

TiO2/AC复合催化剂光催化降解气相1,2-二氯苯

陆胜勇, 黄一龙, 王秋麟, 李晓东, 严建华   

  1. 浙江大学热能工程研究所, 能源清洁利用国家重点实验室, 杭州 310027
  • 收稿日期:2011-05-10 修回日期:2011-06-20 发布日期:2011-08-26
  • 通讯作者: 陆胜勇 E-mail:lushy@zju.edu.cn
  • 基金资助:

    国家重点基础研究发展计划项目(2011CB201500), 国家科技支撑计划项目(2007BAC27B04-4)和水体污染控制与治理科技重大专项课题(2009ZX07317-003)资助

Photocatalytic Degradation of Gaseous 1,2-Dichlorobenzene over TiO2/AC Photocatalysts

LU Sheng-Yong, HUANG Yi-Long, WANG Qiu-Lin, LI Xiao-Dong, YAN Jian-Hua   

  1. State Key Laboratory of Clean Energy Utilization, Institute for Thermal Power Engineering, Zhejiang University, Hangzhou 310027, P. R. China
  • Received:2011-05-10 Revised:2011-06-20 Published:2011-08-26
  • Contact: LU Sheng-Yong E-mail:lushy@zju.edu.cn
  • Supported by:

    The project was supported by the National Key Basic Research Program of China (2011CB201500), National Key Technology Research and Development Program of China (2007BAC27B04-4) and NationalWater Pollution Control and Management Technology Major Projects, China (2009ZX07317-003).

摘要: 以商品活性炭(AC)为载体, 采用溶胶-凝胶法制备不同比表面积和TiO2负载量不同的光催化剂(TiO2/AC). 用氮吸附、X射线衍射(XRD)、扫描电子显微镜(SEM)等表征方法, 获得了所制备的TiO2/AC 性能参数; 并通过降解气相1,2-二氯苯(1,2-DCBz)的实验研究了TiO2/AC催化剂的光催化氧化性能, 主要考察参数包括催化剂使用量、比表面积、气相1,2-DCBz 浓度等对光催化氧化的影响. 结果表明: 负载于AC上的TiO2颗粒粒径为10 nm左右, TiO2颗粒负载在大比表面积的载体AC上有利于光催化降解气相1,2-DCBz. 通过比较商用P25和自制TiO2/AC 光催化剂对气相1,2-DCBz 的降解效果, 证明了AC吸附作用和TiO2光催化降解的协同作用使TiO2/AC光催化剂对气相1,2-DCBz的降解效率有较显著的提高.

关键词: 负载型TiO2, 活性炭载体, 比表面积, 光催化剂, 气相1,2-二氯苯

Abstract: Using commercially available activated carbon (AC) as a carrier, photocatalysts of activated carbon-supported TiO2 (TiO2/AC) with different specific surface areas and TiO2 loading contents were prepared by the sol-gel method. Nitrogen adsorption, X-ray diffraction (XRD), and scanning electron microscopy (SEM) were used to obtain the performance parameters of the TiO2/AC catalysts. The photocatalytic performance of the TiO2/AC catalysts was studied by using gaseous 1,2-dichlorobenzene. The influence of catalyst dose, specific surface area, and gaseous 1,2-dichlorobenzene concentration on this photodegradation was investigated. The results show that a nano-TiO2 deposit was formed with a particle size of approximately 10 nm. The loading of TiO2 onto the AC with a large specific surface area enhanced the photocatalytic activity of TiO2 photocatalysis with regard to the degradation of gaseous 1,2- dichlorobenzene. We show that TiO2/AC catalysts have a synergetic effect on AC adsorption and TiO2 photocatalysis during the degradation of gaseous 1,2-dichlorobenzene by comparing the photocatalytic performance of a commercial P25 catalyst and TiO2/AC catalysts.

Key words: Supported TiO2, Activated carbon support, Specific surface area, Photocatalyst, Gaseous 1,2-dichlorobenzene

MSC2000: 

  • O644