کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1652332 1517346 2006 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Tetramethoxysilane as a convenient silicon source for phase control of cubic SBA-1 mesostructures
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Tetramethoxysilane as a convenient silicon source for phase control of cubic SBA-1 mesostructures
چکیده انگلیسی
The critical role of silica precursors in the synthesis of the cubic SBA-1 mesophase under strongly acidic conditions at different synthesis temperatures has been investigated. The undesirable phase selection in the synthesis of SBA-1 that occurred at high temperatures can be prevented when the conventional silica source tetraethoxysilane (TEOS) is replaced by tetramethoxysilane (TMOS). The presence of higher concentration of methanol due to the faster hydrolysis rate of TMOS, which effectively serves as cosolvent to maintain the high surface curvature of surfactant micelles, is a key factor for preservation of the cubic SBA-1 mesostructure at synthesis temperature higher than 313 K.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 60, Issues 21–22, September 2006, Pages 2594-2599
نویسندگان
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