Design of Mesoporous Silica at Low Acid Concentrations in Triblock Copolymer-Butanol-Water Systems

TL;DRAbstract

Assembly of hybrid mesophases through the combination of amphiphilic block copolymers, acting as structuredirecting agents, and silicon sources using low acid catalyst concentration regimes is a versatile strategy to produce large quantities of high-quality ordered large-pore mesoporous silicas in a very reproducible manner. Controlling structural and textural properties is proven to be straightforward at low HCl concentrations with the adjustment of synthesis gel composition and the option of adding co-structure-directing molecules. In this account, we illustrate how various types of large-pore mesoporous silica can easily be prepared in high phase purity with tailored pore dimensions and tailored level of framework interconnectivity. Silica mesophases with two-dimensional hexagonal (p6mm) and three-dimensional cubi (Fm<TEX>$\overline{3}$</TEX>m, Im<TEX>$\overline{3}$</TEX>m and Ia<TEX>$\overline{3}$</TEX>d) symmetries are generated in aqueous solution by employing HCl concentrations

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