Développement et validation d'un test pour déterminer les propriétés photocatalytiques de surfaces autonettoyantes : application aux couches minces de TiO2

Abstract : The objective of this thesis is to develop a quick photocatalytic test to asses the photocatalytic performance of the self-cleaning glasses. For that purpose, thin coating of TiO2 was realized as a reference by a sol-gel dip-coating technique. The conditions of the deposited films were studied and so optimized. The poisoning of self-cleaning glasses by the diffusion of the ions sodium during the heat treatment necessary for the obtaining of the photoactive phase was studied by a controlled poisoning of various samples of TiO2 coating. The mechanism of poisoning of the self-cleaning glasses by The diffusion of alkaline ions on the photocatalytic activity is discussed. At the end, a hypothesis on the origin of the super-hydrophilic photoinduced conversion of the surface of the TiO2 films is emitted.
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Mohamed Nawfal Ghazzal. Développement et validation d'un test pour déterminer les propriétés photocatalytiques de surfaces autonettoyantes : application aux couches minces de TiO2. Autre. Université Paul Verlaine - Metz, 2008. Français. ⟨NNT : 2008METZ009S⟩. ⟨tel-01752572⟩

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