NaY／MCM-48复合分子筛的合成与表征  

Synthesis and Characterization of NaY/MCM-48 Composite Molecular Sieve

作　　者：李永昕[1] 张艳华[2] 薛冰[1] 

机构地区：[1]江苏工业学院化工系,常州213016 [2]天津大学材料科学与工程学院,天津300072

出　　处：《无机材料学报》2006年第5期1209-1216,共8页Journal of Inorganic Materials

基　　金：国家重大基础研究前期研究资助(2003CCA03200)

摘　　要：以微孔分子筛NaY为内核,合成一种中微孔复合分子筛NaY／MCM-48．通过XRD、SEM、FEM、IR、N2吸附脱附和TPD等手段对复合材料进行了表征,此外对复合材料的水热稳定性进行了考察．研究结果表明,复合材料同时具有中孔分子筛MCM-48和微孔NaY型沸石的特点,并且和纯MCM-48分子筛相比孔壁增厚,孔径变大;与纯中孔分子筛MCM-48相比,复合分子筛的酸性明显增强,并且水热稳定性提高．DFT计算其孔径分布主要集中于1．2和3．2nm．A new material NaY/MCM-48 composite molecular sieve was prepared with NaY- zeolite as the inner core. The synthesized composite sample was characterized by XRD, SEM, TEM, IR, N2 adsorption/desorption method and TPD. In addition, it＇s hydrothermal stability was studied. The results show that the composite material has the properties of both mesoporous MCM-48 and the microporous NaY. The composite molecular sieve has thicker pore wall, larger pore size, stronger acid strength and higher hydrothermal stability than pure mesoporous molecular sieve MCM-48. The DFT pore diameter is mainly located at 1.2nm and 3.2nm.

关 键 词：NaY/MCM-48复合分子筛 孔壁 孔径 水热稳定性 酸性 

分 类 号：TB383[一般工业技术—材料科学与工程]