Acta Phys. -Chim. Sin. ›› 2014, Vol. 30 ›› Issue (3): 513-519.doi: 10.3866/PKU.WHXB201401073

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Visible Light Photocatalytic Activity of an In-Doped TiO2 Thin Film with a Three-Dimensional Ordered Structure

WANG Jing-Sheng1,2, WANG En-Jun3, YU Yan-Long1,2, GUO Li-Mei1,2, CAO Ya-An1,2   

  1. 1 School of Physics, Nankai University, Tianjin 300071, P. R. China;
    2 Key Laboratory of Weak Light Nonlinear Photonics, Ministry of Education, Teda Applied Physics Institutes, Nankai University, Tianjin 300457, P. R. China;
    3 Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, P. R. China
  • Received:2013-11-28 Revised:2014-01-06 Published:2014-02-27
  • Contact: CAO Ya-An E-mail:caoya@nankai.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (51072082, 21173121, 51372120, 51302269).

Abstract:

An In-doped TiO2 thin film with a three-dimensional (3D) ordered structure (IO-TiO2-In) was prepared by the self-assembly template method of polystyrene colloidal crystal growth and sol-gel method. The visible light photocatalytic activity of the IO-TiO2-In thin film for the degradation of formaldehyde is five times that of TiO2 and undoped IO-TiO2. The crystal structure, surface microstructure, and energy band structure of the catalyst were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and ultraviolet-visible (UV-Vis) diffuse reflectance spectroscopy. The IO-TiO2-In thin film is an ordered anatase structure, which increases the specific surface area and photo efficiency, compared with those of pure TiO2. Doped In ions form In2O3 and O-In-Clx (x=1, 2) species on the surface of the thin film. This increases the absorption of visible light, and promotes the separation of photogenerated charge carriers. It improves the efficiency of photogenerated charge carriers in the photocatalytic reaction at the solid/gas interface, and significantly increases the visible light photocatalytic activity.

Key words: Three-dimensional ordered structure, TiO2 thin film, In ion doping, In2O3, In-Clx species, Visible light photocatalytic activity

MSC2000: 

  • O643