The well-ordered SBA-15 mesoporous silica material containing alkyl sulfonic acid group was prepared by post-synthetic grafting of (3-mercaptopropyl)trimethoxysilane (MPTMS) to the surface of SBA-15 synthesized under strong acidic conditions. X-ray diffraction patterns revealed that the crystallinity of SBA-15-SH and SBA-15-SO 3H does not change as compared with SBA-15. 13C and 29Si MAS NMR results showed that MPTMS is grafted onto the surface of the pore wall of SBA-15. IR spectra indicate...