Structure and morphology of propylthiol-functionalised mesoporous silicas templated by non-ionic triblock copolymers
作者： Robert P. Hodgkins , Alfonso E. Garcia-Bennett , Paul A. Wright
DOI: 10.1016/J.MICROMESO.2004.10.036
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摘要: Abstract The effect of the co-condensation 3-mercaptopropyltriethoxysilane (MPTES) in preparation mesoporous silicas has been examined for levels MPTES 0–10 mol% (based on silicon) reported syntheses using block co-polymers P123 and F127. In P123, SBA-15 (p6mm) forms with 0–5 mol% whereas addition 7 mol% silane results highly ordered Ia 3 ¯ d silica. Using F127, synthesis absence gives cubic Fm3m FDU-12 structure, based close packing surfactant micelles, introduction a high concentration stacking defects sequences changes particle morphology. At 5 mol% MPTES, tapered hexagonal prismatic particles nano-domains hexagonally packed structure (space group P63/mmc) are obtained. accessible thiol contents members these two series solids have determined Ellman’s reagent (5,5′-dithiobis-(2-nitrobenzoic acid)): values 50–70% thiols incorporated solid measured as being to this reactant.
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