Sugar-Assisted Synthesis of Ordered and Stable Cubic Mesoporous Silica SBA-1

• Published in: Journal of physical chemistry. C 2010-11, Vol.114 (45), p.19322-19330
• Main Authors: Ting, Chun-Chiang, Wu, Hao-Yiang, Pan, Yu-Chi, Vetrivel, Shanmugam, Fey, George T. K, Kao, Hsien-Ming
• Format: Article
• Language: English
• Subjects: C: Surfaces, Interfaces, Catalysis
• ISSN: 1932-7447; 1932-7455
• DOI: 10.1021/jp104844b

Highly ordered and hydrothermally stable cubic mesoporous silicas SBA-1 (P m3̅n mesophase) have been synthesized over a broad temperature range using tetraethoxysilane (TEOS) and cetyltriethylammonium bromide (CTEABr) as silicon source and template agent, respectively, under highly acidic conditions via addition of sugar molecules such as d-fructose or sucrose as an auxiliary agent. Various synthesis parameters such as d-fructose content, acid concentration and reaction time have been optimized under different synthesis conditions in order to obtain highly ordered mesoporous silica SBA-1 materials with good hydrothermal stability. In contrast to the conventional synthesis methods requiring low synthesis temperature, this strategy allows the preservation of the SBA-1 mesophase under high temperature synthesis conditions and leads to a highly cross-linked silica framework. In particular, the framework locations of the derivatives of d-fructose molecules and their interactions with the surfactant molecules were investigated by two-dimensional 1H−1H exchange NMR. The present NMR results confirmed that the derivatives of d-fructose are in close spatial proximity to the surfactant molecules to form stable spherical micelles with adequate curvatures for the formation of cubic mesophase in a wide range of synthesis conditions.