Synthesis of Mesoporous Chromium Silicates Molecular Sieves in Strong Acidic Media by Assembly of Preformed CrS1 Precursors with Triblock Copolymer  

作　　者：Karima Bendahou Saidi Fatiha Hamidi Leila Cherif Aouali Stephane Siffert Abdelkader Bengueddach Aissa Aissat Fabrice Cazier Antoine Aboukais 

机构地区：[1]Laboratoire de catalyse et synthese en ehimie organique PB 119, Universite de Tlemcen, Algerie [2]Univ Lille Nord de France, F-59000 Lille, France [3]ULCO, LCE, F-59140 Dunkerque, France [4]Laboratoire de ehimie des materiaux Universite d ＇Oran, Algerie [5]ULCO, CCM, F-59140 Dunkerque, France

出　　处：《Journal of Chemistry and Chemical Engineering》2011年第2期177-181,共5页化学与化工（英文版）

摘　　要：Chromium-incorporated mesoporous silica materials （MCrS） have been successfully prepared in strong acidic media by assembly of preformed CrSI precursors with triblock copolymer of the Pluronic type （P123） by a two steps procedure. Various techniques including XRD, N2 adsorption, FT-IR spectroscopy, diffuse reflectance UV-vis （DRUV-vis） and EPR were employed for the materials characterization. MCrS materials have a hexagonal structure with uniform mesopores and contain Cr（V） and Cr（VI） under low and high Cr content and that the mesoporous walls contain the MFI structure building units.

关 键 词：Zeolite precursors CRS-1 MESOPOROUS SBA-15 

分 类 号：O632.13[理学—高分子化学] TQ424.25[理学—化学]