Préparation et caractérisation des catalyseurs à base d’argent, application en catalyse d’oxydation.

Abstract

This work has been divided in the study of two main topics. The first part was devoted to the study of nanostructured materials which present a real potential in catalysis. Our first objective was the synthesis of mesoporous materials, titanosilicates in strong acidic media by assembly of preformed Ti- MFI precursors with triblock copolymer of the pluronic type (P123) by a two steps procedure. This study clearly shows that these mesoporous materials have a hexagonal structure with uniform mesopores and that the mesoporous walls contain the Ti-MFI structure building units. The second objective of this first part concerns the preparation of silver catalysts supported on mesoporous titanosilicates; we have shown that the mesoporous structure has not been altered after silver deposition . The second part of this study concerns the cyclohexene oxidation in the liquid phase on Ag/mesoporous oxide catalysts.