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

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题名:	Sugar-Assisted Synthesis of Ordered and Stable Cubic Mesoporous Silica SBA-1
作者:	Ting,CC;Wu,HY;Pan,YC;Vetrivel,S;Fey,GTK;Kao,HM
贡献者:	化學學系
关键词:	INDUCED PHASE-TRANSFORMATION;MOLECULAR-SIEVES;PORE-SIZE;D-FRUCTOSE;MESOSTRUCTURES;MESOPHASE;TEMPLATE
日期:	2010
上传时间:	2012-03-27 18:10:21 (UTC+8)
出版者:	國立中央大學
摘要:	Highly ordered and hydrothermally stable cubic mesoporous silicas SBA-I (Pm (3) over barn 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-I materials with good hydrothermal stability. In contrast to the conventional synthesis methods requiring low synthesis temperature, this strategy allows the preservation of the SBA-I 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 Ill H 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.
關聯:	JOURNAL OF PHYSICAL CHEMISTRY C
显示于类别:	[化學學系] 期刊論文

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