Phenol Adsorption and Photo-oxidation on Porous Carbon/Titania Composites

Carbon/titania composites with different loadings were prepared and investigated for phenol adsorption and photo-oxidation from dilute aqueous solutions. The rate of phenol adsorption increased when titanium oxide (P25, Degussa) was immobilized on the carbon support due to the porous features of the resulting C/TiO2 composites. The kinetics of phenol adsorption were very fast for samples containing low titanium oxide contents, whereas titania loadings above 20 wt% presented some operational problems that prevented their application in aqueous solutions. Those C/TiO2 composites which exhibited higher adsorption rates in the absence of illumination also showed a more rapid disappearance of phenol from aqueous solution under UV light, together with the formation of lower amounts of intermediates. Removal efficiencies close to 100% were obtained for C/TiO2 composites containing ca. 10-15 wt% titanium oxide, with preferential oxidation of phenol through the formation of catechol.

Bibliographic Details

Main Authors:	Fernández Velasco, Leticia, Parra Soto, José Bernardo, Ovín Ania, María Concepción
Format:	artículo biblioteca
Language:	English
Published:	Multi Science Publishing 2010-11
Online Access:	http://hdl.handle.net/10261/112357
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