Title
A non-aqueous synthesis of <tex>$TiO_{2}SiO_{2}$</tex> composites in supercritical <tex>$CO_{2}$</tex> for the photodegradation of pollutants A non-aqueous synthesis of <tex>$TiO_{2}SiO_{2}$</tex> composites in supercritical <tex>$CO_{2}$</tex> for the photodegradation of pollutants
Author
Faculty/Department
Faculty of Sciences. Bioscience Engineering
Publication type
article
Publication
Weinheim ,
Subject
Chemistry
Biology
Engineering sciences. Technology
Source (journal)
Chemsuschem. - Weinheim
Volume/pages
4(2011) :10 , p. 1457-1463
ISSN
1864-5631
ISI
000296497400010
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Titania/silica composites with different Ti/Si ratios are synthesized via a nonconventional synthesis route. The synthesis involves non-aqueous reaction of metal alkoxides and formic acid at 75 °C in supercritical carbon dioxide. The as-prepared composite materials contain nanometer-sized anatase crystallites and amorphous silica. Large specific surface areas are obtained. The composites are evaluated in the photocatalytic degradation of phenol in aqueous medium, and in the elimination of acetaldehyde from air. The highest photocatalytic activity in both processes is achieved with a composite containing 40&#8197;wt % TiO2.
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