Tungsten-modified HMS catalysts were obtained following the oxo-peroxo and oxo-polyoxo routes by microwave heating method in presence of cetyltrimethylammonium chloride or cetylpyridine chloride as surfactants. The obtained materials were characterized by XRD, N 2 adsorption/desorption, SEM, TEM, FTIR and Raman spectroscopy. XRD patterns at small angle exhibit a peak with differences in intensity of the reflections, significantly influenced by the method and variables of the synthesis. A typical wormhole-like pore structure of W–HMS materials, with network channels and uniform pore sizes, was observed by TEM images. The obtained tungsten-silicates were active in oxidation with hydrogen peroxide of the hydrocarbons with double bonds as styrene. The best results were obtained for the catalysts synthesized by oxo-polyoxo route, with ordered porous structure, high surface area and lower Si/W molar ratio.
|Pages (de - à)||847-853|
|Nombre de pages||7|
|journal||Revue Roumaine de Chimie|
|Numéro de publication||9|
|Etat de la publication||Publié - 1 janv. 2018|
Plateforme technologique Caracterisation physico-chimiques
Equipement/installations: Plateforme technolgique