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Journal of Nanomaterials
Volume 2014, Article ID 678505, 7 pages
http://dx.doi.org/10.1155/2014/678505
Research Article

Fabrication of CdS/H-TiO2 Nanotube Arrays and Their Application for the Degradation of Methyl Orange in Aqueous Solutions

1School of Chemistry Science and Technology, and Institute of Physical Chemistry, Zhanjiang Normal University, 29 Cunjin Road, Chikan District, Zhanjiang 524048, China
2The State Key Laboratory of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, 11A Datun Road, Chaoyang District, Beijing 100101, China

Received 9 April 2014; Accepted 26 April 2014; Published 14 May 2014

Academic Editor: Prashant Kumar

Copyright © 2014 Xiaosong Zhou 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

The fabrication and characterization of heterogeneous structures based on CdS and self-doped TiO2 nanotube arrays (H-TNTs) are reported for the first time. CdS was conformally deposited onto TiO2 nanotube arrays (TNTs) using a simple method of electrochemical atomic layer deposition. The as-prepared samples were characterized by scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), UV-Vis diffusion reflection spectroscopy (UV-Vis DRS), and photoluminescence spectroscopy (PL) techniques. Compared with pure TNTs, CdS/H-TNTs exhibit enhanced photoelectrochemical properties and photocatalytic activity under visible light. Self-doping introduces oxygen vacancies and Ti3+ species, and the electrochemical deposition technique promotes the deposition of CdS onto TiO2 nanotube walls, forming a heterojunction compact structure and resulting in decrease in photocatalytic activity under visible light.