RESEARCH ARTICLE


Photocatalytic Activity of TiO2 on Activated Carbon Under Visible Light in the Photodegradation of Phenol



Andreína García*, Juan Matos
Engineering of Materials and Nanotechnology Centre, Catalysis, Venezuelan Institute for Scientific Research, I.V.I.C., 20632, Caracas 1020-A, Venezuela.


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© 2010 García and Matos;

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to this author at the Engineering of Materials and Nanotechnology Centre, Catalysis, Venezuelan Institute for Scientific Research, I.V.I.C., 20632, Caracas 1020-A, Venezuela; Tel: 0058-212-5041306; Fax: 0058-212-5041166; E-mail: agarciag@ivic.ve


Abstract

The photodegradation of phenol under visible light by using TiO2 and activated carbon prepared by physical activation was performed. Activated carbon was prepared from Tabebuia Pentaphyla wood by physical activation under CO2flow at 800ºC. UV-Vis lamp with a high proportion of visible light was used. Kinetic results of phenol photodegradation indicated a beneficial effect between TiO2and AC. An increase of apparent first-order rate constant (kapp) by a factor of 1.74 in presence of TiO2-AC was obtained in comparison than TiO2 alone. This cooperative effect between both solids was ascribed to the high surface area and basic surface pH of this type of AC.

Keywords: Heterogeneous photocatalysis, Activated carbon, Phenol, TiO2.