Synthesis and Characterization of mesoporous molecular sieve Al-MCM-41

Mesoporous molecular sieve Al-MCM-41 is synthesized in a basic medium by hydrothermal crystallization method,using sodium silicate as silicate source,sodium aluminate as aluminium source and cetyltrimethyl ammonium bromide as template.The effects of synthesis conditions on the quality of Al-MCM-41 are investigated by X-Ray ,TEM,IR and N2 adsorption-deadsorption .The results show that the mesoporous molecular sieve with good crystallization degree and ordered pore structure can be obtained when pH value is 11～13,the ratio of template to SiO2 is 0.07～0.20,the crystallizing time is 72 h at 120 ℃,the synthesized product is baked for 5 h to 550 ℃ at the heating rate of 2 ℃/min.The result of N2 adsorption-desadsorption shows pore-volume,BET special surface area and mean pore size of Al-MCM-41 are 0.942 cm3/g,1 190 m2/g and 3.16 nm separately.