EFFECT OF FUNCTIONALIZATION CONDITIONS ON LOADINGS OF 3-(TRIMETHOXYSILYL)-1-PROPANOLTHIOL IN HEXAGONAL MESOPOROUS SBA-15

Thiol-functionalized SBA-15 silicas have been directly synthesized by cocondensationof tetraethyl orthosilicate (TEOS) and 3-(trimethoxysilyl)-1-propanolthiol(TSPT) under hydrothermal condition. Mesoporous structure was obtained after thesurfactant removal by Soxhlet and reflux ethanol extraction. These materials werecharacterized by means of powder X-ray diffraction, isotherms of nitrogenadsorption/desorption, thermal analysis, infrared spectroscopy and energy-dispersive X-rayspectroscopy. The initial molar ratio of TEOS to TSPT, the time of adding TSPT tosynthesize gel and the Soxhlet and reflux ethanol extraction to obtain thiol-functionalizedSBA-15 silicas with high thiol content and highly ordered hexagonal mesostructure werediscussed.