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

doi:10.1007/BF02436911

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

Institute of Chemistry

Research output: Contribution to journal › Article › peer-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 language	English
Pages (from-to)	619-623
Number of pages	5
Journal	Journal of Sol-Gel Science and Technology
Volume	8
Issue number	1-3
DOIs	https://doi.org/10.1007/BF02436911
State	Published - 1997

Keywords

Photocatalysis
Photodegradation
Rhodamine B
Supported titania

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10.1007/BF02436911

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title = "The Incorporation of Titania into Modified Silicates for Solar Photodegradation of Aqueous Species",

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.",

keywords = "Photocatalysis, Photodegradation, Rhodamine B, Supported titania",

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AU - Matthews, Lowell R.

AU - Avnir, David

AU - Modestov, Alexander D.

AU - Sampath, Srinivasan

AU - Lev, Ovadia

PY - 1997

Y1 - 1997

N2 - 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.

AB - 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.

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KW - Photodegradation

KW - Rhodamine B

KW - Supported titania

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

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Keywords

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