Table of Contents
Journal of Catalysts
Volume 2014 (2014), Article ID 413693, 8 pages
http://dx.doi.org/10.1155/2014/413693
Research Article

Supported TiO2 on Borosilicate Glass Plates for Efficient Photocatalytic Degradation of Fenamiphos

1Laboratory of Spectroscopy, Molecular Modelisation, Material and Environment (LS3ME), Faculty of Sciences, University Med V-Agdal, Avenue Ibn Battouta, BP 1014, Agdal, Rabat, Morocco
2Nanotechnology and Integrated BioEngineering Centre, University of Ulster, Newtownabbey BT37 0QB, UK

Received 4 September 2013; Revised 17 November 2013; Accepted 4 December 2013; Published 15 January 2014

Academic Editor: Raghunath V. Chaudhari

Copyright © 2014 A. El Yadini 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

Supported titanium dioxide (TiO2) was investigated for the photodegradation of the insecticide fenamiphos in water. The photocatalyst was immobilised on borosilicate glass plates and the kinetics of degradation were studied in a stirred tank reactor under UV irradiation. Two types of TiO2, for example, Millennium PC500 (100% anatase) and Degussa P25 (80% anatase, 20% rutile), were used. Their activities have been based on the rates of insecticide disappearance. Experiments were investigated to evaluate the effect of pH and initial concentrations of fenamiphos as well as catalyst doses on the photocatalytic degradation of fenamiphos. Kinetic parameters were experimentally determined and an apparent first-order kinetic was observed. For photolysis process of fenamiphos, two photoproducts were identified and characterized using high performance liquid chromatography/mass spectrometry (HPLC/MS). The plausible mechanism of photolysis involved is the oxidation of sulfonamide group. In presence of photocatalyst TiO2, photodegradation was observed. Under identical conditions, Degussa P25 shows higher photocatalytic activity in regard to PC500 Millennium and complete degradation was observed after 180 min.