Rapid sonochemical synthesis of MCM-41 type benzene-bridged periodic mesoporous organosilicas.

Benzene-bridged periodic mesoporous organosilicas (PMOs) with the MCM-41 were synthesized by a rapid sonochemical process via co-condensation of tetraethoxysilane (TEOS) and 1,4-bis(triethoxysilyl) benzene (BTEB) under basic conditions within a few minutes using cetyltrimethylammoniumbromide (CTMABr) as a structure-directing agent. The molar ratio of the silicon precursors and the synthesis time were varied in order to investigate their influence on the structural ordering of the materials. The characteristics of the materials were evaluated by X-ray diffraction (XRD), N2-sorption, transmission electron microscopy (TEM) and solid-state NMR spectroscopy.

A simple one-pot route to mesoporous silicas SBA-15 functionalized with exceptionally high loadings of pendant carboxylic acid groups.

Ordered SBA-15 functionalized with a high loading of pendant carboxylate groups has been synthesized via co-condensation of tetraethoxysilane (TEOS) and carboxyethylsilanetriol sodium salt (CES) templated by Pluronic P123 under acidic conditions.