The characteristics of samples were investigated using xrd , hrtem , n2 adsorption technique and so on , and it was shown that mesoporous silica mcm - 41 had been synthesized in this work with uniformly sized pores and long - distance ordered arrangement of hexagonal structure , and the pore size was about 2nm , and could be regulated by the second hydrothermal treatment or the addition of l , 3 , 5 - trimethylbenzene ( tmb ) as organic assistant expander 结果表明合成试样孔径尺寸单一，六方孔道排列，具有良好的长程有序结构，孔径为2 . 1nm ，为典型的有序介孔结构。并通过二次水热处理和添加有机辅助剂1 ， 3 , 5 -三甲苯( tmb )对合成mcm - 41的孔径进行调节。
