化学学报 ›› 2011, Vol. 69 ›› Issue (05): 536-542. 上一篇    下一篇

研究论文

碳纳米管的表面修饰及TiO2-CNTs复合催化剂的光催化性能

杨汉培*,石泽敏,戴开静,段云平,吴俊明   

  1. (河海大学水文水资源与水利工程科学国家重点实验室 河海大学环境科学与工程学院
    浅水湖泊综合治理与资源开发教育部重点实验室 南京 210098)
  • 收稿日期:2010-08-29 修回日期:2010-11-02 出版日期:2011-03-14 发布日期:2010-11-12
  • 通讯作者: 杨汉培 E-mail:yanghanpei@hhu.edu.cn
  • 基金资助:

    留学回国人员科研基金;河海大学自然科学基金

Surface Modification of Carbon Nano Tubes for the Photocatalytic Activity Enhancement of Composite TiO2-CNTs

YANG Han-Pei, SHI Ze-Min, DAI Kai-Jing, DUAN Yun-Ping, WU Jun-Ming   

  1. (1 State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, College of Environment Science and Engineering, Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, Hohai University, Nanjing 210098)
  • Received:2010-08-29 Revised:2010-11-02 Online:2011-03-14 Published:2010-11-12
  • Contact: Han-Pei YANG E-mail:yanghanpei@hhu.edu.cn

运用酸氧化和聚乙烯醇表面修饰碳纳米管, 修饰的碳纳米管的水分散性能显著改善. 进一步地运用低温水热法合成表面修饰的碳纳米管复合TiO2, 观察到了复合催化剂紫外及可见光激发下的光催化性能的明显提升. 红外光谱、X光电子能谱、差热-热重分析、X光衍射、Brunauer-Emmett-Teller低温氮吸附、透射电镜及紫外-可见漫反射光谱等表征表明, 复合催化剂光催化性能改善与碳纳米管良好水溶液分散性能导致的TiO2在修饰的碳纳米管表面的均匀、致密分散和密切键合, 从而充分利用碳纳米管的功能密切关联.

关键词: 碳纳米管, 表面修饰, 水分散性, 复合催化剂, 光催化

A new method to improve photocatalytic performance of TiO2 by dispersing TiO2 onto carbon nano tubes (CNTs) hydrophilically modified by acid and polyvinyl alcohol is reported. Characterizations using various techniques such as Fourier transform-infrared spectroscopy, X ray photoelectron spectroscopy, thermogravimetric-differential thermal analysis, X-ray diffraction, Brunauer-Emmett-Teller N2 adsorption, transmission electron microscopy and UV-Vis diffuse reflectance spectroscopy indicated that the improved photocatalytic activity of the composites was attributed to the high dispersion of TiO2 on CNTs and the intimate contact between TiO2 and CNTs resulting in dense heterojunctions at the interface of TiO2 and CNTs to take full advantages of CNTs functionalities.

Key words: carbon nano tubes, surface modification, aqueous dispersibility, composite catalyst, photocatalysis