Abstract
This thesis is devoted to the elaboration, characterization and valorization of catalysts based on transition metals inserted in molecular sieves or transition metal oxides impregnated on the same type of molecular sieves.The prepared support is the microporous silicoaluminophosphate of AFI-type phase (SAPO4-5) synthesized by hydrothermal method. The transition metals, titanium and iron, are inserted into the framework of SAPO4-5 by isomorphic substitution during the hydrothermal synthesis or deposited as oxides by impregnation of the SAPO4-5 particles. Three series of catalysts were prepared: iron and/or titanium-doped SAPO4-5 (FAPSO4-5, TAPSO4-5 and FTAPSO4-5), SAPO4-5 impregnated with iron (Fe/SAPO4-5) and titanium (TiO2/SAPO4-5) with different rates (20, 30, 40 and 50 wt%).The prepared materials were characterized by thermogravimetric analysis (TGA), X-ray diffraction, scanning electron microscopy, textural analyses by nitrogen adsorption-desorption, X-ray photoelectron spectroscopy (XPS), infrared spectroscopy, 57Fe Mössbauer spectroscopy, diffuse reflection spectroscopy and photoelectrochemical analysis.The catalysts have been valorized in two reactions with the production of hydrogen by the photoreduction of water and the elimination of a pharmaceutical product (diclofenac) in aqueous solution by photocatalysis, respectively.