title: A non-aqueous synthesis of TiO₂/SiO₂ composites in supercritical CO₂ for the photodegradation of pollutants.
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 wt % TiO₂.
authors: Centre for Surface Chemistry and Catalysis, Catholic University of Leuven, Kasteelpark Arenberg 23, 3001 Heverlee, Belgium.
authors: Jasper
authors: J
authors: Jammaer
authors: Carmela
authors: C
authors: Aprile
authors: Sammy W
authors: SW
authors: Verbruggen
authors: Silvia
authors: S
authors: Lenaerts
authors: Paolo P
authors: PP
authors: Pescarmona
authors: Johan A
authors: JA
authors: Martens