Photocatalytic degradation of pentachlorophenol on TiO2 sol-gel catalysts |
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Authors: | Pecchi G Reyes P Sanhueza P Villaseñor J |
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Affiliation: | Departamento de Físico-Química, Facultad de Ciencias Químicas, Universida de Conceptión, Chile. gpecchi@udec.cl |
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Abstract: | The photocatalytic degradation of pentachlorophenol (PCP) in aqueous solution was investigated using TiO2 catalysts. The samples were prepared by the sol-gel method using different gelation pH and different calcination temperatures. The solids were characterized by specific surface area, X-ray diffraction, UV-Vis absorbance, FTIR and pentachlorophenol adsorption. The catalytic activity of the solids was evaluated in a conventional photoreactor at 298 K using 30 ppm of pentachlorophenol. It was found that the reaction follows a first-order reaction and the kinetic constant values change slightly with the pH of gelation and more significantly with the calcination temperature. |
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