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International Journal of Photoenergy
Volume 2009, Article ID 905987, 6 pages
Research Article

Photocatalytic Activity in CN Related to the Surface Properties of Powders Prepared by Sol-Gel Method

1Dipartimento di Ingegneria Civile ed Ambientale, Università di Perugia, Via G. Duranti, 06125 Perugia, Italy
2Dipartimento di Chimica, Università di Perugia, Via Elce di Sotto, 06123 Perugia, Italy

Received 11 May 2009; Revised 9 July 2009; Accepted 6 August 2009

Academic Editor: Leonardo Palmisano

Copyright © 2009 Marta Bettoni 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.


Some powders, prepared from titanium(IV)tetraisopropoxide by the sol-gel method and thermally treated between 100 and C, have been characterized by X-ray powder diffraction and by nitrogen adsorption and desorption at 77 K to calculate the BET-specific surface area, from which the micropore volume and the external surface area can be derived. The photocatalytic activity () of the above powders has been evaluated considering the -sensitized photo-oxidation of 4-methoxybenzyl alcohol in CN as the test reaction. The decrease of have been related to the decrease of the BET surface area, the micropore volume, and the external surface area of the powders, but a satisfactory linear correlation is observed only for the last superficial parameter.