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

Research output: Contribution to journalArticlepeer-review


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 languageEnglish
Pages (from-to)1457-1463
Number of pages7
Issue number10
Publication statusPublished - 17 Oct 2011


  • carbon dioxide
  • composites
  • metal oxides
  • supercritical fluids
  • titania


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