Table of Contents
International Journal of Photochemistry
Volume 2014, Article ID 387536, 6 pages
http://dx.doi.org/10.1155/2014/387536
Research Article

The Photocatalytic Oxidation of 4-Chlorophenol Using Bi2WO6 under Solar Light Irradiation

1Department of Chemistry, Organic Analysis and Catalysis Laboratory, Simón Bolívar University, Caracas 1080A, Venezuela
2Department of Chemistry, Electrochemistry Laboratory, Simón Bolívar University, Caracas 1080A, Venezuela

Received 30 April 2014; Accepted 28 June 2014; Published 5 August 2014

Academic Editor: M. El-Khouly

Copyright © 2014 Lorean Madriz 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 report discusses the effects of the initial concentration of 4-chlorophenol (4-CP) on its solar light photoinduced oxidation/mineralization kinetics on Bi2WO6 catalyst. Photocatalytic degradation followed the Langmuir-Hinshelwood (L-H) mechanism. From the kinetic data the Langmuir adsorption equilibrium constant of 4-CP on the Bi2WO6 surface and the L-H maximum reaction rate for 4-CP oxidation have been evaluated. Chromatographic and spectroscopy studies show the presence of p-benzoquinone and maleic acid as the main reaction products; these compounds first increase and then decay until they disappear. Chemical oxygen demand (COD) and produced CO2 measurement show that photocatalytic mineralization of the phenolic compound was readily possible in a wide concentration range.