The Incorporation of Titania into Modified Silicates for Solar Photodegradation of Aqueous Species

Lowell R. Matthews*, David Avnir, Alexander D. Modestov, Srinivasan Sampath, Ovadia Lev

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

31 Scopus citations

Abstract

A new class of sol-gel-derived photocatalytic materials has been synthesized and used in solar-assisted photodegradation studies. The materials are comprised of a homogeneous dispersion of commercial TiO2 powder into silica and organically modified silicate (Ormosil) hosts. The efficiency of the photocatalytic properties of these TiO2-containing materials was determined by their relative performance in the solar photodecomposition of aqueous rhodamine B. The improved adsorption properties of the modified materials compared to commercial TiO2 increase the photodecomposition rate and the buoyancy properties, although excess hydrophobicity decreases the wetted section of the catalyst and its photocatalytic performance. These materials can be used as floatable catalysts for solar-assisted water purification.

Original languageAmerican English
Pages (from-to)619-623
Number of pages5
JournalJournal of Sol-Gel Science and Technology
Volume8
Issue number1-3
DOIs
StatePublished - 1997

Keywords

  • Photocatalysis
  • Photodegradation
  • Rhodamine B
  • Supported titania

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