Preparation and Characterization of MCM-41 Mesoporous Silica Functionalized with Sulfonic Acid Groups

Abstract

Mesoporous molecular sieve MCM-41 was modified by using 3-mercaptopropyltriethoxysilane as a coupling agent and MCM-41 functionalized with sulfonic acid groups was prepared. The prepared product was characterized by X-ray diffraction, Fourier transform infrared spectroscopy, nitrogen adsorption-desorption technique and temperature programmed desorption. The results showed that during the process of modification the frameworks of the molecular sieve were not destroyed, the channel has ordered property. SH group was successfully grafted to the surface of channels of the molecular sieve. The acid amount on the mesoporous material functionalized with sulfonic acid groups reached 0.755mmol/g, showing a potential application foreground as a catalyst.