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化学学报
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化学学报 ›› 2009, Vol. 67 ›› Issue (5): 367-371. 上一篇    下一篇

研究论文

WC/TiO2纳米复合材料的制备及其电催化性能

王晓娟 马淳安* 李国华 郑遗凡

  

  1. (浙江工业大学绿色化学合成技术国家重点实验室培育基地 化学工程与材料学院
    纳米科学与技术研究中心 杭州 310032)

  • 投稿日期:2008-05-26 修回日期:2008-07-25 发布日期:2009-03-14
  • 通讯作者: 马淳安

Preparation and Electrocatalytic Properties of WC/TiO2 Nanocomposite

Wang, Xiaojuan Ma, Chunan* Li, Guohua Zheng, Yifan   

  1. (Research Center of Nanoscience and Technology, State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, School of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310032)
  • Received:2008-05-26 Revised:2008-07-25 Published:2009-03-14
  • Contact: Ma, Chunan

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被引次数

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以TiCl4为原料, 采用溶胶水解法合成了金红石型纳米TiO2颗粒, 并以其为载体制备了WC/TiO2纳米复合材料. 采用X射线衍射(XRD)、扫描电子显微镜(SEM)和X射线能谱(EDS)等手段分析了WC/TiO2纳米复合材料的晶相组成和表面形貌. 结果显示样品是由WC, TiO2和W组成, 纳米WC颗粒均匀地包覆在TiO2的表面, 并与TiO2构成了WC/TiO2纳米复合材料. 采用循环伏安法和计时电流法研究了WC/TiO2纳米复合材料对硝基苯的电催化性能. 结果表明, WC/TiO2纳米复合材料对硝基苯的电催化活性和电化学稳定性均优于介孔结构碳化钨(meso-WC)和纳米WC颗粒(part-WC).

关键词: WC/TiO2, 纳米复合材料, 硝基苯, 电催化

TiO2 nanoparticles of rutile phase were synthesized by hydrolysis of TiCl4 and subsequently used as the supports for the preparation of WC/TiO2 nanocomposites. The nanocomposites were characterized by XRD, SEM and EDS methods, showing that the nanocomposites were composed of the WC nanoparticles uniformly dispersed on the surface of TiO2. The electrocatalytical activity and electrochemical stability of the WC/TiO2 nanocomposites for the electroreduction of nitrobenzene were investigated by cyclic voltammetry and chronoamperometry. Results indicated that the WC/TiO2 nanocomposites exhibited higher activity and better stability for the electroreduction of nitrobenzene than mesoporous WC (meso-WC) and WC nanoparticles (part-WC).

Key words: WC/TiO2, nanocomposite, nitrobenzene, electrocatalysis