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A Non-Aqueous Synthesis of TiO2/SiO2 Composites in Supercritical CO2 for the Photodegradation of Pollutants

  1. Jasper Jammaer2,
  2. Prof. Carmela Aprile1,2,*,
  3. Sammy W. Verbruggen2,3,
  4. Prof. Silvia Lenaerts3,
  5. Prof. Paolo P. Pescarmona2,
  6. Prof. Johan A. Martens2,*

Article first published online: 20 MAY 2011

DOI: 10.1002/cssc.201100059

Issue

ChemSusChem

ChemSusChem

Special Issue: Energy Materials

Volume 4, Issue 10, pages 1457–1463, October 17, 2011

Additional Information

How to Cite

Jammaer, J., Aprile, C., Verbruggen, S. W., Lenaerts, S., Pescarmona, P. P. and Martens, J. A. (2011), A Non-Aqueous Synthesis of TiO2/SiO2 Composites in Supercritical CO2 for the Photodegradation of Pollutants. ChemSusChem, 4: 1457–1463. doi: 10.1002/cssc.201100059

Author Information

  1. 1

    Département de Chimie, Unité de Chimie des Nanomatériaux (UCNANO), Facultés Universitaires Notre-Dame de la Paix, Rue de Bruxelles 61, 5000 Namur (Belgium), Fax: (+32) 81 72 54 14

  2. 2

    Centre for Surface Chemistry and Catalysis, Catholic University of Leuven, Kasteelpark Arenberg 23, 3001 Heverlee (Belgium)

  3. 3

    Department Bioscience-Engineering, University of Antwerp, Middelheimcampus G.V. 609, Groenenborgerlaan 171, 2020 Antwerp (Belgium)

*Département de Chimie, Unité de Chimie des Nanomatériaux (UCNANO), Facultés Universitaires Notre-Dame de la Paix, Rue de Bruxelles 61, 5000 Namur (Belgium), Fax: (+32) 81 72 54 14

Publication History

  1. Issue published online: 13 OCT 2011
  2. Article first published online: 20 MAY 2011
  3. Manuscript Received: 31 JAN 2011

Funded by

  • CECAT
  • Methusalem

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Keywords:

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

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.

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