Abstract
Silica mesoporous materials of the MSM-41 type were obtained by bitemplate (solubilization) synthesis in an aqueous electrolyte solution (sodium chloride) using sodium metasilicate as the source of silica, alkylpyridinium halogenides as the micelle-forming surfactants, and monoethanoamides of n-aliphatic acids or trialkylphosphine oxides as the solubilizers. The influence of a singly-charged electrolyte and a solution of bitemplate composition on the X-ray structure and structure adsorption characteristics of the synthesized materials was analyzed. It was shown that mesoporous silica with better spatial structure and high specific surface values (Ssp = 1170–1200 m2/g, ΣV = 0.80–1.10 cm3/g, Dmeso = 3.5–4.1 nm) are formed under the investigated conditions of synthesis when alkylpyridinium halogenides with a length of a hydrocarbon radical consisting of 10, 12, or 14 carbon atoms are used.
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