Nanocrystalline TiO<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:msub><mml:mi></mml:mi><mml:mn>2</mml:mn></mml:msub></mml:math> with enhanced photoinduced charge separation as catalyst for the phenol degradation

Canevali, Carmen; Morazzoni, Franca; Scotti, Roberto; Bellobono, Ignazio Renato; Giusti, Marco; Sommariva, Marco; D'Arienzo, Massimiliano; Testino, Andrea; Musinu, Anna; Cannas, Carla

doi:https://doi.org/10.1155/IJP/2006/90809

International Journal of Photoenergy

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Volume 2006 | Article ID 090809 | https://doi.org/10.1155/IJP/2006/90809

Nanocrystalline TiO2 with enhanced photoinduced charge separation as catalyst for the phenol degradation

Carmen Canevali,¹Franca Morazzoni,¹Roberto Scotti,¹Ignazio Renato Bellobono,²Marco Giusti,¹Marco Sommariva,¹Massimiliano D'Arienzo,¹Andrea Testino,¹Anna Musinu,³and Carla Cannas³

Received15 Feb 2006

Accepted23 Mar 2006

Published13 Jun 2006

Abstract

Nanocrystalline TiO2 catalysts based on pure rutile (R100) and a 30% of anatase and 70% of rutile (R70) were synthesized by the sol-gel method, using Pluronic PE 6400 as templating agent. Catalysts were characterized in terms of structural and morphological properties; moreover, the formation of paramagnetic charge carriers under UV irradiation was studied and related to the activity of TiO2 in the photoinduced degradation of phenol. With respect to Degussa P25, the two sol-gel catalysts show lower surface area and a wider pore size distribution. The EPR spectra recorded under UV irradiation show enhanced charge separation in the sol-gel samples, with the O− species in higher amount than in Degussa P25. This result is in agreement with the high catalytic activity of R100 sample in the photoinduced degradation of phenol, very similar to that displayed by Degussa P25 and higher than that of R70 sample.

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Copyright © 2006 Carmen Canevali 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.

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