Synthesis and characterization of mesoporous and amorphous silica modified with silica-organo-sulfogroups

• Published in: Journal of porous materials Vol. 19; no. 1; pp. 119 - 131
• Main Authors: Kister, Olesya, Roessner, Frank
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.02.2012; Springer Nature B.V
• Subjects: Catalysis; Characterization and Evaluation of Materials; Chemistry; Chemistry and Materials Science; Conversion; Diffraction; Functional groups; Infrared radiation; Physical Chemistry; Porous materials; Silica gel; Synthesis; X-rays; Modification of MCM-41; Modification of silica gel; Sulfonation; Silica gel; MCM-41
• ISSN: 1380-2224; 1573-4854
• DOI: 10.1007/s10934-011-9455-z

Amorphous silica gel and mesoporous MCM-41 with sulfo organic layer were prepared by post synthesis two step modifications, i.e. silylation with benzylchloro-dimethyl-silane, followed by treatment with chlorosulfonic acid. Resulting composites have a porous structure similar to that of non-modified materials, as shown by nitrogen adsorption and X-ray diffraction measurements. The successful incorporation of the functional groups was indicated by IR spectroscopy and NMR analysis. The grafted functional groups are thermally stable up to 723 K, as found by thermo gravimetrical and IR measurements. The results obtained from catalytic conversion of methylbutinol indicate the presence of acidic centers.