Synthesis and Characterization of MCM-48 Molecular Sieves with High Specific Surface Area

摘要

The hydrothermal synthesis of MCM-48 molecular sieves with CTAB and TEAOH as dual template agents and alkaline silica sol as silicon source has been systematically studied. The samples prepared at different crystallization temperature and time were analyzed by XRD, IR, nitrogen adsorption and desorption. The result shows that the best crystallization temperature and time are 100°C and 48h, respectively. According to BJH algorithm, the specific surface area of the sample is 1088 ～ 1669 m~2/g, the pore size is 2.48 ～ 2.54 nm, and the pore volume is 1.2064 ～ 1.2630 cm~3/g. Because it has high specific surface area, it can be widely used in catalytic adsorption, environmental engineering, biomedicine and other fields.