中文摘要：

在表面活性剂浓度很低（n（CTAB）／n（SiO2）=0．05，n（CTAB）／n（H2O）=8．3×10^-4）的合成体系中，从具有口沸石次级结构单元的溶胶前驱体出发，在碱性条件下合成了高度规整六方排列的介孔分子筛。采用XRD、N2吸附-脱附、FT—IR、HRTEM、DTG、NMR和水热处理等手段，表征了样品的结构特征和性能。结果表明，以低浓度表面活性剂为模板，可以得到孔壁含口沸石次级结构单元的高度有序的介孔分子筛；铝元素主要以四配位状态存在于介孔分子筛骨架中。与普通MCM 41相比，此法合成的样品呈现较高的水热稳定性，主要是由于沸石次级结构单元进入分子筛孔壁，提高了骨架的聚合度和孔壁的厚度。

英文摘要：

Mesoporous molecular sieves with the structure of MCM-41 have been synthesized in alkaline situation, by using the cationic surfactants of low concentration （n （CTAB）/n （SiO2） = 0.05, n（CTAB）/n（H2O）=8.3 × 10^-4） as template and the gel contaning secondary building units of β zeolite as precursors. The ordered mesoporous materials were characterized by XRD, N2 adsorption and desorption, FT-IR, HRTEM, DTG, NMR and hytrothermal treatment methods. The results indicated that the samples had ordered hexagonal structure with β zeolite secondary units in its pore walls,which are thicker than the walls of MCM-41 synthesized by normal hydrothermal ways. The synthesized materials were superior to conventional MCM 41 with respect to their higher hydrothermal stability. The retention of zeolite-like connectivity of tetrahedral AlO4 and SiO4 units upon assembling the nanoclusters into mesostructured materials and thicker framework pore walls contributed to the good hydrothermal stability greatly.