摘要
在碱性条件下，采用水热晶化法，以水玻璃为硅源，偏铝酸钠为铝源，十六烷基三甲基溴化铵为结构模板荆，成功合成出了含铝介孔分子筛Al-MCM-41．采用XRD，TEM，IR及N2吸附等表征手段研究了合成条件对A1．MCM-41介孔分子筛的的影响，结果表明，在pH值为11～13、模板荆与Si02之比为0．07～0．20，120℃下晶化72h，以2℃／min的速率升温至550℃焙烧5h得到结晶度和有序性高的Al-MCM-41．N2吸附结果表明：合成的Al-MCM-41的孔客为0．942cm3／g，比表面积为1190H12／g，平均孔径为3．16nm，该分子筛具有较大的孔客、比表面积和较窄的孔径分布．
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.
出处
《西安石油大学学报（自然科学版）》
CAS
2007年第3期104-107,共4页
Journal of Xi’an Shiyou University（Natural Science Edition）
关键词
Al-MCM-41介孔分子筛
水热合成
性能表征
mesoporous molecular sieve Al-MCM-41
hydrothermal synthesis
characterization of property
