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International Journal of Photoenergy
Volume 2014, Article ID 524135, 14 pages
http://dx.doi.org/10.1155/2014/524135
Review Article

An Overview: Recent Development of Titanium Oxide Nanotubes as Photocatalyst for Dye Degradation

1Nanotechnology & Catalysis Research Centre (NANOCAT), Institute of Postgraduate Studies (IPS), University of Malaya, 3rd Floor, Block A, 50603 Kuala Lumpur, Malaysia
2Department of Chemistry, Sahmyook University, Seoul 139-742, Republic of Korea

Received 25 December 2013; Revised 14 January 2014; Accepted 15 January 2014; Published 27 February 2014

Academic Editor: Jiaguo Yu

Copyright © 2014 Chin Wei Lai 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

Today, organic dyes are one of the largest groups of pollutants release into environment especially from textile industry. It is highly toxic and hazardous to the living organism; thus, the removal of these dyes prior to discharge into the environment is essential. Varieties of techniques have been employed to degrade organic dyes and heterogeneous photocatalysis involving titanium dioxide (TiO2) appears to be the most promising technology. In recent years, TiO2 nanotubes have attracted much attention due to their high surface area and extraordinary characteristics. This paper presents a critical review of recent achievements in the modification of TiO2 nanotubes for dye degradation. The photocatalytic activity on dye degradation can be further enhanced by doping with cationic or anionic dopant.