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Mesoporous and Nanoparticulate Metal Oxides: Applications in New Photocatalysis

Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNConference contribution/Paperpeer-review

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Mesoporous and Nanoparticulate Metal Oxides: Applications in New Photocatalysis. / Boxall, Colin.
Proceedings of the 10th Asian Conference on Solid State Ionics: Advanced Materials for Emerging Technologies. ed. / B.V.R. Chowdari; M.A. Careem; M.A.K.L. Dissanayake; R.M.G. Rajapakse; V.A. Seneviratne. Singapore: World Scientific, 2006. p. 788.

Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSNConference contribution/Paperpeer-review

Harvard

Boxall, C 2006, Mesoporous and Nanoparticulate Metal Oxides: Applications in New Photocatalysis. in BVR Chowdari, MA Careem, MAKL Dissanayake, RMG Rajapakse & VA Seneviratne (eds), Proceedings of the 10th Asian Conference on Solid State Ionics: Advanced Materials for Emerging Technologies. World Scientific, Singapore, pp. 788, 10th Asian Conference on Solid State Ionics, Kandy, Sri Lanka, 12/06/06.

APA

Boxall, C. (2006). Mesoporous and Nanoparticulate Metal Oxides: Applications in New Photocatalysis. In B. V. R. Chowdari, M. A. Careem, M. A. K. L. Dissanayake, R. M. G. Rajapakse, & V. A. Seneviratne (Eds.), Proceedings of the 10th Asian Conference on Solid State Ionics: Advanced Materials for Emerging Technologies (pp. 788). World Scientific.

Vancouver

Boxall C. Mesoporous and Nanoparticulate Metal Oxides: Applications in New Photocatalysis. In Chowdari BVR, Careem MA, Dissanayake MAKL, Rajapakse RMG, Seneviratne VA, editors, Proceedings of the 10th Asian Conference on Solid State Ionics: Advanced Materials for Emerging Technologies. Singapore: World Scientific. 2006. p. 788

Author

Boxall, Colin. / Mesoporous and Nanoparticulate Metal Oxides: Applications in New Photocatalysis. Proceedings of the 10th Asian Conference on Solid State Ionics: Advanced Materials for Emerging Technologies. editor / B.V.R. Chowdari ; M.A. Careem ; M.A.K.L. Dissanayake ; R.M.G. Rajapakse ; V.A. Seneviratne. Singapore : World Scientific, 2006. pp. 788

Bibtex

@inproceedings{923a599e0af24b238ca01019691573f7,
title = "Mesoporous and Nanoparticulate Metal Oxides: Applications in New Photocatalysis",
abstract = "Semiconductor metal oxides find application in dye-sensitised solar cells and as photocatalysts for a range of environmentally and industrially useful reactions. In both technologies, the systems are driven by the initial absorption of photons to form charge carriers. These charge carriers may subsequently recombine or diffuse to the oxide surface where they may undergo interfacial electron transfer. In the case of modern solar cells, this involves transfer of the photogenerated charge from the sensitising dye to the semiconductor matrix; in the case of photocatalysis, this involves transfer of the photogenerated charge from the semiconductor to solution. In solar cells, the semiconductor is most often employed in the form of a mesoporous layer; in photocatalysis, it may be in form of either a mesoporous layer or as nanoparticles. Since 1972, the main foci of photocatalysis have been the photodestruction of organic pollutants and the splitting of water for hydrogen generation. Our studies have focussed on new applications of photocatalysis beyond these areas, in particular the applications of photocatalysis in nuclear fuel reprocessing; the development of novel, magnetic nanocomposite photocatalysts; and the production and characterisation, for sensor applications, of conducting mesoporous metal oxide films that exhibit high degrees of photo-induced superhydrophilicity. This lecture will present an overview of these studies, concentrating on our work on superhydrophilic materials – the onset of superhydrophilicity in metal oxides being thought to be due to the photogeneration of oxygen vacancies within the semiconductor lattice. We are currently using Quartz Crystal Microbalance-based photo-induced condensation experiments (Fig 1, the first time such a phenomena has been reported) to study these systems and shall report on our attempts to correlate the degree of condensation within the metal oxide mesopores with photo-induced surface energy changes on the metal oxide by use of the Kelvin Equation for capillary condensation. ",
keywords = "photocatalysis, superhydrophilicity, Quartz crystal microbalance",
author = "Colin Boxall",
note = "Invited submission; 10th Asian Conference on Solid State Ionics ; Conference date: 12-06-2006 Through 16-06-2006",
year = "2006",
language = "English",
isbn = "981-256-877-8",
pages = "788",
editor = "B.V.R. Chowdari and M.A. Careem and M.A.K.L. Dissanayake and R.M.G. Rajapakse and V.A. Seneviratne",
booktitle = "Proceedings of the 10th Asian Conference on Solid State Ionics",
publisher = "World Scientific",

}

RIS

TY - GEN

T1 - Mesoporous and Nanoparticulate Metal Oxides: Applications in New Photocatalysis

AU - Boxall, Colin

N1 - Invited submission

PY - 2006

Y1 - 2006

N2 - Semiconductor metal oxides find application in dye-sensitised solar cells and as photocatalysts for a range of environmentally and industrially useful reactions. In both technologies, the systems are driven by the initial absorption of photons to form charge carriers. These charge carriers may subsequently recombine or diffuse to the oxide surface where they may undergo interfacial electron transfer. In the case of modern solar cells, this involves transfer of the photogenerated charge from the sensitising dye to the semiconductor matrix; in the case of photocatalysis, this involves transfer of the photogenerated charge from the semiconductor to solution. In solar cells, the semiconductor is most often employed in the form of a mesoporous layer; in photocatalysis, it may be in form of either a mesoporous layer or as nanoparticles. Since 1972, the main foci of photocatalysis have been the photodestruction of organic pollutants and the splitting of water for hydrogen generation. Our studies have focussed on new applications of photocatalysis beyond these areas, in particular the applications of photocatalysis in nuclear fuel reprocessing; the development of novel, magnetic nanocomposite photocatalysts; and the production and characterisation, for sensor applications, of conducting mesoporous metal oxide films that exhibit high degrees of photo-induced superhydrophilicity. This lecture will present an overview of these studies, concentrating on our work on superhydrophilic materials – the onset of superhydrophilicity in metal oxides being thought to be due to the photogeneration of oxygen vacancies within the semiconductor lattice. We are currently using Quartz Crystal Microbalance-based photo-induced condensation experiments (Fig 1, the first time such a phenomena has been reported) to study these systems and shall report on our attempts to correlate the degree of condensation within the metal oxide mesopores with photo-induced surface energy changes on the metal oxide by use of the Kelvin Equation for capillary condensation.

AB - Semiconductor metal oxides find application in dye-sensitised solar cells and as photocatalysts for a range of environmentally and industrially useful reactions. In both technologies, the systems are driven by the initial absorption of photons to form charge carriers. These charge carriers may subsequently recombine or diffuse to the oxide surface where they may undergo interfacial electron transfer. In the case of modern solar cells, this involves transfer of the photogenerated charge from the sensitising dye to the semiconductor matrix; in the case of photocatalysis, this involves transfer of the photogenerated charge from the semiconductor to solution. In solar cells, the semiconductor is most often employed in the form of a mesoporous layer; in photocatalysis, it may be in form of either a mesoporous layer or as nanoparticles. Since 1972, the main foci of photocatalysis have been the photodestruction of organic pollutants and the splitting of water for hydrogen generation. Our studies have focussed on new applications of photocatalysis beyond these areas, in particular the applications of photocatalysis in nuclear fuel reprocessing; the development of novel, magnetic nanocomposite photocatalysts; and the production and characterisation, for sensor applications, of conducting mesoporous metal oxide films that exhibit high degrees of photo-induced superhydrophilicity. This lecture will present an overview of these studies, concentrating on our work on superhydrophilic materials – the onset of superhydrophilicity in metal oxides being thought to be due to the photogeneration of oxygen vacancies within the semiconductor lattice. We are currently using Quartz Crystal Microbalance-based photo-induced condensation experiments (Fig 1, the first time such a phenomena has been reported) to study these systems and shall report on our attempts to correlate the degree of condensation within the metal oxide mesopores with photo-induced surface energy changes on the metal oxide by use of the Kelvin Equation for capillary condensation.

KW - photocatalysis

KW - superhydrophilicity

KW - Quartz crystal microbalance

M3 - Conference contribution/Paper

SN - 981-256-877-8

SP - 788

BT - Proceedings of the 10th Asian Conference on Solid State Ionics

A2 - Chowdari, B.V.R.

A2 - Careem, M.A.

A2 - Dissanayake, M.A.K.L.

A2 - Rajapakse, R.M.G.

A2 - Seneviratne, V.A.

PB - World Scientific

CY - Singapore

T2 - 10th Asian Conference on Solid State Ionics

Y2 - 12 June 2006 through 16 June 2006

ER -