Photocatalytic Activity in CH 3 CN Related to the Surface Properties of TiO 2 Powders Prepared by Sol-Gel Method

Some TiO 2 powders, prepared from titanium(IV)tetraisopropoxide by the sol-gel method and thermally treated between 100 and 1000 ∘ 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 micro...

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Bibliographic Details
Published inInternational journal of photoenergy Vol. 2009; pp. 1 - 6
Main Authors Bettoni, Marta, Candori, Pietro, Marmottini, Fabio, Perenze, Nicoletta, Rol, Cesare, Sebastiani, Giovanni V., Vecchiocattivi, Franco
Format Journal Article
LanguageEnglish
Published 2009
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Summary:Some TiO 2 powders, prepared from titanium(IV)tetraisopropoxide by the sol-gel method and thermally treated between 100 and 1000 ∘ 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 ( k a ) of the above powders has been evaluated considering the TiO 2 -sensitized photo-oxidation of 4-methoxybenzyl alcohol in CH 3 CN as the test reaction. The decrease of k a have been related to the decrease of the BET surface area, the micropore volume, and the external surface area of the TiO 2 powders, but a satisfactory linear correlation is observed only for the last superficial parameter.
ISSN:1110-662X
1687-529X
DOI:10.1155/2009/905987