کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10248172 49192 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation of highly ordered mesoporous WO3-TiO2 as matrix in matrix-assisted laser desorption/ionization mass spectrometry
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Preparation of highly ordered mesoporous WO3-TiO2 as matrix in matrix-assisted laser desorption/ionization mass spectrometry
چکیده انگلیسی
Mesoporous tungsten titanium oxides (MTTO) materials have been synthesized by using triblock copolymer (EO106PO70EO106, Pluronic F127) as a structure-directing agent via “acid-base pairs” strategy. Two different inorganic precursors, tungsten chloride (WCl6) and titanium isopropoxide [Ti(OPr)4], were used as the “acid-base pair”. The calcined MTTO materials have been investigated by using XRD, TEM, N2 adsorption-desorption isotherms and UV-DRS techniques. The XRD and TEM results show that MTTO materials have well-defined two-dimensional (2D) hexagonal mesostructure. The N2 adsorption-desorption isotherm of the MTTO materials shows that the products have a pore size of 9.8 nm, a pore volume of 0.29 cm3 g−1 and a BET surface area of 150 m2 g−1. The UV-DRS spectrum for the MTTO materials reveals that the materials possess maximum absorption at 340 nm. Such materials have been utilized as matrix to detect the peptide (Gramicidin S) by matrix-assisted laser desorption/ionization mass spectrometry (MALDI-MS). The results show that the signal intensities of the MALDI-MS spectrum for Gramicidin S with the MTTO materials as matrix are about hundredfold of those obtained with nonporous WO3-TiO2 as matrix.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Microporous and Mesoporous Materials - Volume 78, Issue 1, 4 February 2005, Pages 37-41
نویسندگان
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