Abstract
The facile synthesis of sulfo-functionalized mesoporous silica (MCM-41) by a one-step process of surfactant removal and thiol oxidation technique through a temperature-controlled calcination of a precursor is presented. Thiol containing mesoporous silica is synthesized as a precursor by hydrolysis and co-condensation of tetramethoxysilane (TMOS) and mercaptopropyl trimethoxysilane (MPTMS). The samples thus prepared are shown to preserve the ordered two-dimensional hexagonal structure and pore characteristics of MCM-41, while functionalizing the material with sulfo groups which was oxidized from thiol groups providing strong acidity. The acidity of the material is demonstrated by high ammonia uptakes and low differential adsorption energy of ammonia.
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