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Contribution des caractérisations photocatalytiques et de l’analyse de surface pour l’application de propriétés photocatalytiques en surface de substrats organiques (textiles et papiers)

Abstract : This thesis work is part of a collaborative project with an industrial purpose aiming at the development of composite materials with photocatalytic properties (composed of TiO2 nanoparticles) obtained by sol-gel process for application on organic substrates (textiles and paper): integration of TiO2 nanoparticles into a sol-gel hybrid (organic-inorganic) matrix and dispersion of TiO2 nanoparticles in mesoporous silica microparticles. The original contribution of this work was to develop characterization by surface analysis techniques (SEM, XPS and ToF-SIMS) and correlate these results to those from the photocatalytic tests (following the degradation of a model pollutant (formic acid) in aqueous solution under UV irradiation). Complementarily to the issue of matrices porosity, surface analysis techniques (SEM, XPS and ToF –SIMS) allowed to define criteria such as availability of photocatalyst (TiO2) at the outermost surface but also the modification of the matrix around the TiO2. These criteria were used to better understand the differences in photocatalytic properties of various composite materials deposited on the surface of organic substrates
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Imane Benchenaa. Contribution des caractérisations photocatalytiques et de l’analyse de surface pour l’application de propriétés photocatalytiques en surface de substrats organiques (textiles et papiers). Chimie théorique et/ou physique. Université Claude Bernard - Lyon I, 2014. Français. ⟨NNT : 2014LYO10068⟩. ⟨tel-01530922⟩

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