A facile route to synthesizing functionalized mesoporous SBA-15 materials with platelet morphology and short mesochannels

作者：Chen Shih Yuan; Tang Chih Yuan; Chuang Wei Tsung; Lee Jey Jau; Tsai Yi Ling; Chan Jerry C C; Lin Ching Yen; Liu Yu Cheng; Cheng Soofin

来源：Chemistry of Materials, 2008, 20(12): 3906-3916.

DOI：10.1021/cm703500c

A facile synthesis route for preparing SBA-15 silica of platelet shape and very short mesochannels (150-350 nm) was developed by introducing a small amount of Zr(IV) ions in the synthesis solution. The synthesis route can be easily extended to prepare platelet SBA-15 materials with various organic functional groups up to 1.87 mmol/g loading in one pot. In situ XRD and freeze-fracture replication TEM were found to be powerful, techniques for studying the self-assembly processes. The platelet SBA-15 with short mesochannels in 150-350 nm was formed because of the fast self-assembly rate of P123 micelles and TEOS accelerated by the Zr(IV) ions in the synthesis solution. The platelet SBA-15 materials are superior to the conventional SBA-15 of rod or fiber morphologies in facilitating molecular diffusion and less possibility of pore blockage when used in the sorption or reactions of bulky molecules.

• 出版日期2008-6-24