Table of Contents
ISRN Materials Science
Volume 2011 (2011), Article ID 261219, 18 pages
http://dx.doi.org/10.5402/2011/261219
Review Article

An Overview on the Photocatalytic Activity of Nano-Doped-TiO𝟐 in the Degradation of Organic Pollutants

School of Chemical Engineering, Universiti Sains Malaysia, Engineering Campus, Seri Ampangan, Seberang Perai Selatan, Pulau Pinang, 14300 Nibong Tebal, Malaysia

Received 11 September 2011; Accepted 19 October 2011

Academic Editors: D. Chicot and P. Sánchez

Copyright © 2011 Yong Nian Tan 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

This paper aims to review and summarize the recent works on the photocatalytic degradation of various organic pollutants in the presence of nano-doped-TiO2 photocatalysts. In this regard, three main aspects are examined: (a) the presence of various dopants (metal dopants, nonmetal dopants, halogen dopants, metalloid dopants, and codopants) in the formation of nano-doped-TiO2 photocatalysts, (b) the effect of the presence of dopants on the photocatalytic degradation of organic pollutants, and (c) the effects of various operating parameters on the photocatalytic degradation of organic pollutants in the presence of nano-doped-TiO2 photocatalysts. Reports resulted suggest that the formation of a high percentage of the anatase phase, small crystallite size, and high specific surface area of the nano-doped-TiO2 photocatalysts depends on the presence of various dopants in the photocatalysts. The majority of the dopants have the potential to improve the photocatalytic efficiency of nano-doped-TiO2 in the degradation of organic pollutants. The photocatalytic degradation of organic compounds depends on the calcination temperature of the prepared doped TiO2, initial reactant concentration, dosage of doped TiO2, and dopant doping concentration.