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Journal of Nanomaterials
Volume 2011, Article ID 432947, 5 pages
Research Article

Preparation of Crystalline Sn-Doped TiO2 and Its Application in Visible-Light Photocatalysis

1College of Chemistry, Chemical Engineering and Materials Science, SooChow University, SooChow 215021, China
2State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China

Received 21 June 2011; Revised 27 July 2011; Accepted 28 July 2011

Academic Editor: Chunyi Zhi

Copyright © 2011 Zhou Xiufeng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Sn-doped TiO2 nanoparticles were prepared by the vapor transport method of water molecules and characterized by XRD and XPS analyses. The TEM images indicated that as-prepared samples were highly dispersed nanoparticles with a small and uniform size below 20 nm, as it would effectively control the rate of hydrolysis of Ti4+ by adjusting the flow speed of water vapor. Meanwhile, the photocatalytic properties of Sn-doped TiO2 were tested, and the results showed that doping an appropriate amount of Tin would improve the photocatalytic activity of TiO2 by enhancing the separation rate of photogenerated electrons and holes on the surface of TiO2. In addition, the calcination temperature and Tin content had an important influence on the photocatalytic activity of TiO2. When the mix ratio of Sn:Ti reached 1%, and the nano-Sn-TiO2 sample was calcined at 4 0 0 o C , it showed the best photocatalytic activity.