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Journal of Nanomaterials
Volume 2014, Article ID 298619, 9 pages
http://dx.doi.org/10.1155/2014/298619
Research Article

Photocatalytic Activity Enhancement of Anatase TiO2 by Using TiO

Laboratory of Quantum Engineering and Quantum Materials, Advanced Material Laboratory, School of Physics Department and Telecommunication Engineering, South China Normal University, Guangzhou 510006, China

Received 28 December 2013; Accepted 21 January 2014; Published 16 March 2014

Academic Editor: Chuanfei Guo

Copyright © 2014 Zhenrui Chen 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.

Abstract

We employed high-energy ball-milling technique to fabricate TiO/ heterogeneous nanostructures. XRD proved the existence of TiO/ heterogeneous structures. SEM and HRTEM investigation evidenced that the mean particle size and mean grain size of the as-prepared samples are 23 nm and 13 nm, respectively. UV-Vis spectra exhibited that TiO has enhanced the visible light absorption of and has changed the of . UPS examination indicated that the electron work function (EWF) of TiO is higher than that of . Photocatalytic degradation experiments revealed that an appropriate TiO content can enhance the photocatalytic activity of pure anatase . The best photocatalytic activity of TiO/ heterogeneous nanostructures is even better than that of Au-deposited by keeping high degradation efficiency of 93%. The internal electrical field producing in TiO/ heterogeneous nanostructures was considered to be dominantly responsible for the enhanced photocatalytic activity. Therefore, the substitution of TiO with noble metal in will be widely used in the future due to its low cost. This study also provides a clear direction of enhancing photocatalytic activity of : incorporating a guest compound into with an appropriate content if the compound has much higher electron work function than that of .