Physicochemical features of formation of silicate porous mesophases

Silicate mesoporous mesophases analogous to SBA-3 or MCM-41 with the hexagonal (honeycomb) structure can be synthesized in a moderately acidic region (pH ∼2.5—5). The synthesis was carried out using aqueous solutions of sodium silicate and a surfactant of the alkyltrimethylammonium bromide type as the starting precursors.