Synthesis and characterization of vinyl-functionalized SBA-15 by a direct synthesis grafting method

摘要

In this work, vinyl-functionalized SBA-15 ("vinyl-SBA-15") was prepared using triethoxyvinylsilane (TEVS) and tetraethoxysilane (TEOS) as co-precursors and a non-ionic triblock copolymer surfactant, EO_(20)PO_(70)EO_(20), as a template. A direct synthesis grafting (DSG) method was proposed to prepare the vinyl-SBA-15 in order to sustain high loading of organic moieties onto channel wall via one-pot synthesis with maintaining the structural order of the SBA-15 for preparing the vinyl-SBA-15. For comparison, the vinyl-SBA-15 was also prepared by the direct synthesis (DS) method. The method to reduce the synthesis time by quenching was also discussed.