中孔分子筛MCM-41形成机理的考察  

Study of the Formation Mechanism of Mesoporous Molecular Sieve MCM-41

作　　者：袁忠勇[1] 陈铁红[1] 王敬中[1] 李赫咺[1] 

机构地区：[1]南开大学化学系催化研究室,天津300071

出　　处：《物理化学学报》1997年第5期452-454,共3页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金

摘　　要：The formation mechanism of mesoporous molecular sieve materials MCM-41 in differ-ent synthetic systerns has been studied systendcally In the Na2O-(CTMA)2O-SiO2-H2O system,it is found that liquid-crystal templating mechanism should be that silica first forms silicated mi-celle with surfactant cation, then silica/CTMA+ micelle polylnerizes with each other forming thehexagonal mesophase. The experimental results in the TMAOH-SiO2-CTMABr-H2O system sup-ports the mechanism proposed for a surfactant-silica system from the lamellar to the hexagonalmesophase. Therefore, it is found that the formation mechanisrns of MCM-41 molecular sieves arenot the same under different synthetic conditions and in different synthetic systems.The formation mechanism of mesoporous molecular sieve materials MCM-41 in differ-ent synthetic systerns has been studied systendcally In the Na2O-(CTMA)2O-SiO2-H2O system,it is found that liquid-crystal templating mechanism should be that silica first forms silicated mi-celle with surfactant cation, then silica/CTMA+ micelle polylnerizes with each other forming thehexagonal mesophase. The experimental results in the TMAOH-SiO2-CTMABr-H2O system sup-ports the mechanism proposed for a surfactant-silica system from the lamellar to the hexagonalmesophase. Therefore, it is found that the formation mechanisrns of MCM-41 molecular sieves arenot the same under different synthetic conditions and in different synthetic systems.

关 键 词：分子筛 MCM-41 中孔分子筛 催化材料 吸附材料 

分 类 号：O647.33[理学—物理化学] O643.36[理学—化学]