Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10248172 | Microporous and Mesoporous Materials | 2005 | 5 Pages |
Abstract
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 9.8Â nm, a pore volume of 0.29Â cm3Â gâ1 and a BET surface area of 150Â m2Â gâ1. The UV-DRS spectrum for the MTTO materials reveals that the materials possess maximum absorption at 340Â 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.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Catalysis
Authors
Minjia Yuan, Zhe Shan, Bozhi Tian, Bo Tu, Pengyuan Yang, Dongyuan Zhao,