A non-aqueous synthesis of TiO 2/SiO 2 composites in supercritical CO 2 for the photodegradation of pollutants

Jasper Jammaer; Carmela Aprile; Sammy W. Verbruggen; Silvia Lenaerts; Paolo P. Pescarmona; Johan A. Martens

doi:10.1002/cssc.201100059

A non-aqueous synthesis of TiO ₂/SiO ₂ composites in supercritical CO ₂ for the photodegradation of pollutants

Jasper Jammaer, Carmela Aprile, Sammy W. Verbruggen, Silvia Lenaerts, Paolo P. Pescarmona, Johan A. Martens

Unit of nanomaterials chemistry

Research output: Contribution to journal › Article › peer-review

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% TiO ₂. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Original language	English
Pages (from-to)	1457-1463
Number of pages	7
Journal	ChemSusChem
Volume	4
Issue number	10
DOIs	https://doi.org/10.1002/cssc.201100059
Publication status	Published - 17 Oct 2011

Keywords

carbon dioxide
composites
metal oxides
supercritical fluids
titania

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1002/cssc.201100059

Cite this

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title = "A non-aqueous synthesis of TiO 2/SiO 2 composites in supercritical CO 2 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% TiO 2. Copyright {\textcopyright} 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.",

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T1 - A non-aqueous synthesis of TiO 2/SiO 2 composites in supercritical CO 2 for the photodegradation of pollutants

AU - Jammaer, Jasper

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AU - Pescarmona, Paolo P.

AU - Martens, Johan A.

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AB - 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% TiO 2. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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