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Synthèse, caractérisations et propriétés de surface de nanopoudres d'oxydes à vocation catalytique

Abstract : We studied the influence of high energy bail milling crushing on Iwo types of oxides with catalytic properties. First of ail, two titanium dioxide powders (TiO2 PG and TiO2 GG) were characterized according to the time of milling. During milling, TiO2 anatase is transformed into rutile via a phase hot pressure/hot temperature called TiO2 Il. With TiO2 PG, we tried to correlate the decrease of the photocatalytic activity and the evolution of the properties of surface with the time of milling. The second family of oxides is composed of zirconia and ceria as weil as two solid solutions formed starting from these two powders. We compared the properties of surface of the powders synthesized according to three ways (an annealing and 2 milling) for the solid solutions and the effect of milling on the properties of surface of the starting powders. We could note notable and interesting differences between the powders obtained by milling and the powders obtained by thermal way.
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Submitted on : Thursday, March 29, 2018 - 12:36:21 PM
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Olivier Humbert. Synthèse, caractérisations et propriétés de surface de nanopoudres d'oxydes à vocation catalytique. Autre [cond-mat.other]. Institut National Polytechnique de Lorraine, 2004. Français. ⟨NNT : 2004INPL086N⟩. ⟨tel-01750035⟩



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