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International Journal of Photoenergy
Volume 2013, Article ID 179427, 6 pages
Research Article

The Photocatalytic Property of Nitrogen-Doped TiO2 Nanoball Film

College of Physics and Electronic Engineering, Henan Normal University, Xinxiang, Henan 453007, China

Received 14 October 2012; Revised 8 December 2012; Accepted 8 December 2012

Academic Editor: Jiaguo Yu

Copyright © 2013 Haiying Wang and Yanchun Hu. 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.


TiO2 nanoball films of nitrogen doping and no doping were prepared by anodic oxidation method. The nitrogen-doped samples exhibited significant enhanced absorption in visible light range, narrowing band gap from 3.2 eV to 2.8 eV and the smaller nanoball diameter size. The concentrations of methyl blue reduce to nearly 44% after 4-hour photodecomposition test by nitrogen-doped sample. It is indicated that there may be two main reasons for the enhanced photocatalytic activity: the increase of O vacancy and photocatalytic reactivity surface area in nitrogen-doped samples.