کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1484620 991639 2008 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Morphology control of MSU-1 silica particles
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Morphology control of MSU-1 silica particles
چکیده انگلیسی

Mesoporous silica, MSU-1 with spherical morphology was prepared using TEOS (tetraethylorthosilicate) as a silica source in the presence of an alkyl polyethylene oxide surfactant via the novel two-step process proposed by Prouzet’s group: hydrolysis of TEOS conducted in highly acidic condition at room temperature followed by condensation promoted by fluoride salt addition at 35 °C. The particles produced were characterized by XRD, SEM, and N2 adsorption/desorption isotherm. Static condensation period was found to be essential to have spherical morphology. Growth of spherical particles and evolution of porosity were studied as a function of time, temperature, NaF/TEOS, and TEOS/surfactant ratio. The MSU-1 particles prepared under different synthesis conditions were briefly tested for chromatographic separation of selected organic molecules, which demonstrates the governing influence of the pore size in MSU-1 on retention time.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Non-Crystalline Solids - Volume 354, Issue 1, 1 January 2008, Pages 1–9
نویسندگان
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