کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1653176 1007658 2007 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation and characterization of vinyl-functionalized mesoporous SBA-15 silica by a direct synthesis method
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
Preparation and characterization of vinyl-functionalized mesoporous SBA-15 silica by a direct synthesis method
چکیده انگلیسی

Vinyl groups were used to functionalize the pore channels of mesoporous SBA-15 materials by the co-condensation of tetraethyl orthosilicate (TEOS) and triethoxyvinylsilane (TEVS) in the presence of poly(ethylene glycol)–B-poly(propylene glycol)–B-poly(ethylene glycol) (P123) surfactants under acidic conditions. The final materials were investigated in detail by means of FT-IR, XRD, TEM, solid state NMR and N2 adsorption, in order to study the effect of vinyl concentration on their mesoscopic order and pore structure. The results show that vinyl groups are attached covalently to the pore wall of SBA-15 after modification. The mesoscopic architecture almost remains intact upon functionalization, with only a minor decrease of the intensity of (110) diffractions for the 20 mol% TEVS-functionalized samples, which still preserve a desirable pore structure, with a surface area of 883.7 m2/g, a pore volume of 0.98 cm3/g and a mean pore size of 4.4 nm.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 61, Issue 7, March 2007, Pages 1469–1473
نویسندگان
, , , , , , ,