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化学学报
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化学学报 ›› 2009, Vol. 67 ›› Issue (5): 403-408. 上一篇    下一篇

研究论文

纳米TiO2复合光催化剂的制备及其光解水制氢性能研究

万中全a 郑树楠b 贾春阳*,a 延 卫*,b

  

  1. (a电子科技大学 电子薄膜与集成器件国家重点实验室 成都 610054)
    (b西安交通大学 动力工程多相流国家重点实验室 西安 710049)

  • 投稿日期:2008-07-03 修回日期:2008-10-09 发布日期:2009-03-14
  • 通讯作者: 贾春阳

Preparation of Nano-TiO2 Composite Photocatalysts and Their Photocatalytic Performances for Hydrogen Production

Wan, Zhongquan a Zheng, Shunan b Jia, Chunyang *,a Yan, Wei *,b   

  1. (a State Key Laboratory of Electronic Thin Films and Integrated Devices, University of Electronic Science and Technology of China, Chengdu 610054)
    (b State Key Laboratory of Multiphase Flow in Power Engineering, Xi′an Jiaotong University, Xi′an 710049)
  • Received:2008-07-03 Revised:2008-10-09 Published:2009-03-14
  • Contact: Jia, Chunyang

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2417

被引次数

48

采用溶胶凝胶法分别制备p-MWNTs-TiO2及p-MWNTs/ZnTPP-TiO2复合纳米光催化剂, 并通过热重分析、透射电镜、X射线粉末衍射和紫外-可见漫反射光谱对光催化剂的物理性质进行了表征. 结果表明: 复合光催化剂中碳纳米管热解温度明显提前, TiO2晶化温度延迟, 相变受到抑制, 紫外特征吸收较纯TiO2有明显红移. 对所制备的光催化剂进行光解水产氢性能测试结果表明: 光催化剂的产氢速率维持相对恒定, 有较好的光学稳定性; p-MWNTs和p-MWNTs/ZnTPP对TiO2的掺杂提高了其光催化活性, 光催化剂产氢活性的大小顺序为p-MWNTs/ZnTPP-TiO2＞p-MWNTs-TiO2＞P25＞TiO2.

关键词: 溶胶凝胶, TiO2, 光催化剂, 氢, 碳纳米管, 卟啉

p-MWNT-TiO2 and p-MWNT/ZnTPP-TiO2 composite photocatalysts were prepared by a sol-gel method, and their physical properties were characterized by thermogravimetric analysis (TG), transmission electron microscopy (TEM), X-ray powder diffraction (XRD) and ultraviolet visible diffuse reflectance spectrum (UV-Vis/DRS). The results indicate that the crystallization temperature of TiO2 has been delayed and the phase change restrained because carbon nanotubes have been doped into TiO2. Compared with pure TiO2, the absorptions of the composite photocatalysts were red-shifted obviously. The photocatalytic performance for hydrogen production is in an order of p-MWNT/ZnTPP-TiO2＞p-MWNT-TiO2＞P25＞TiO2.

Key words: sol-gel, titanium dioxide, photocatalyst, hydrogen, carbon nanotube, porphyrin