Mesoporous silica membranes were free from large defects, the gas permeance of N2 and the separation factor of H2/N2 measured under room temperature and a pressure of 0.12MPa were 1.81Xl0-5mol/(m2 s Pa) and 2.431, respectively.

• 膜较完整、无大缺陷，室温、0.；12MPa下N_2的气体渗透通量为1