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Fonctionnalisation de surface par chimie douce en solution liquide. Nanoparticules métalliques (platine, or, argent) et revêtements TiO2

Abstract : Structural, optical, and photocatalytic properties of sol-gel TiO2 films have been studied. A particular attention has been paid to the influence of platinum metal nanoparticles on the photocatalytic activity. In that view, several platinisation protocols have been prospected to disperse platinum particles through photochemistry routes at the surfaces of TiO2 films. It is shown how a suitable control of the size, amount, and dispersion of platinum particles, which in turn relies on optimized elaboration parameters, yields a photocatalytic activity enhancement by a factor 3 to 4 compared to non-platinized films. These studies have also evidenced an unusual magnetism of platinum nanoparticles formed through photochemistry routes, as well as the potential of these particles for (photo)-electrochemical applications. These photochemistry routes have also been extrapolated to the elaboration of gold and silver nanoparticles, whose potential for optical and plasmonic applications is discussed.
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https://tel.archives-ouvertes.fr/tel-00460932
Contributor : David Riassetto <>
Submitted on : Wednesday, June 2, 2010 - 4:16:03 PM
Last modification on : Thursday, November 19, 2020 - 12:59:51 PM
Long-term archiving on: : Thursday, September 23, 2010 - 12:56:16 PM

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  • HAL Id : tel-00460932, version 2

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David Riassetto. Fonctionnalisation de surface par chimie douce en solution liquide. Nanoparticules métalliques (platine, or, argent) et revêtements TiO2. Matériaux. Institut National Polytechnique de Grenoble - INPG, 2009. Français. ⟨tel-00460932v2⟩

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