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Journal of Nanomaterials
Volume 2012 (2012), Article ID 909473, 6 pages
http://dx.doi.org/10.1155/2012/909473
Research Article

Gas-Supported High-Photoactivity TiO2 Nanotubes

Key Laboratory of Advanced Textile Materials and Manufacturing Technology of Ministry of Education, Zhejiang Sci-Tech University, Hangzhou 310018, China

Received 18 October 2012; Accepted 28 November 2012

Academic Editor: Xijin Xu

Copyright © 2012 Sheng Wang 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

By changing hydrothermal condition and post-heat-treatment temperature, silica-coated nanotubes are obtained successfully. The effects of gas-supported process on tubular morphology, crystallinity, and photocatalytic activity are discussed. It is found that the sample prepared at hydrothermal treatment (180°C/9 h) and calcination (650°C/2 h) shows perfect open-ended tubular morphology and increased crystallinity. The photoactivity of the sample is proved to be 5 times higher than that of nanoparticles.