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Advances in Materials Science and Engineering
Volume 2015, Article ID 759853, 10 pages
http://dx.doi.org/10.1155/2015/759853
Research Article

Titanium Dioxide Supported on Different Porous Materials as Photocatalyst for the Degradation of Methyl Green in Wastewaters

1Laboratoire Eau, Energie et Environnement (LR3E) (AD-10-02), Ecole Nationale d’Ingénieurs de Sfax, Université de Sfax, BP 1173, 3038 Sfax, Tunisia
2Institut Jean Le Rond d’Alembert, Université Pierre et Marie Curie (UPMC) (Paris 6), Sorbonne Universités, 2 Place de la Gare de Ceinture, 78210 Saint-Cyr-l’École, France
3Institut Jean Le Rond d’Alembert, UMR CNRS 7190, 2 Place de la Gare de Ceinture, 78210 Saint-Cyr-l’École, France

Received 14 April 2015; Revised 3 August 2015; Accepted 3 August 2015

Academic Editor: Charles C. Sorrell

Copyright © 2015 Haithem Bel Hadjltaief 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

TiO2 nanoparticles were immobilized on two porous materials used as catalyst supports, namely, activated carbon (AC) and natural clay (NC), through an impregnation process using TiO2 (P25) as precursor. The so-prepared composite materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transition electron microscopy (TEM), and nitrogen physisorption, that is, Brunauer-Emmett-Teller (BET) surface area determination. SEM and TEM observation evidenced that TiO2 was deposited on AC and NC surface. XRD results confirmed that TiO2 existed in a mixture of anatase and rutile phases. The specific surface area of photocatalysts decreased drastically in comparison with the original materials. The photocatalytic activity of these materials was assayed in the oxidation of Methyl Green (MG) dye in aqueous medium under UV irradiation. TiO2/AC exhibited higher photocatalytic oxidation activity than TiO2 at neutral pH. Total mineralization of MG was confirmed by means of COD analysis, pointing to these materials as an efficient, cost-effective, and environment friendly alternative for water treatment.