硅酸盐学报2011，Vol.39Issue(6)：995-999,5.
硅/钴摩尔比对MCM-48介孔分子筛结构性能的影响
Effects of Si/Co Molar Ratios on Textural Property of MCM-48 Mesoporous Molecular Sieve
摘要
Abstract
Using tetraethyl orthosilicate (TEOS) as silica source, cetyltrimethyl ammonium bromide (CTAB) as a template and sodium fluoride as a inorganic salt additive, cobalt-incorporated MCM-48 mesoporous materials (Co-MCM-48) were synthesized by the hydrothermal method. Effects of different molar ratios n(Si):n(Co) in synthesis gel on textural property of the MCM-48 mesoporous materials were investigated. The changes in textural properties were evaluated by the X-ray diffraction (XRD), transmission electron microscopy, Fourier transform infrared spectroscopy (FTIR), ultraviolet-visible speetrophotometry (UV-Vis), temperature programmed reduction (TPR), and N2 physical adsorption. Results show that when n(Si):n(Co)=25, the as-synthesized Co-MCM-48 still exhibits a cubic mesoporous framework and has a high specific surface area (1 002.9 m2/g). Characterization by the FTIR, UV-Vis and TPR suggests that cobalt is incorporated into framework of the MCM-48. Specific surface area and pore volume of the synthesized Co-MCM-48 sample gradually decrease with the increase of cobalt content in the synthesis gel; pore size gradually increases and mesoporous ordering begins to deteriorate.关键词
介孔分子筛/合成/结构性能/表征Key words
mesoporous molecular sieve/ synthesis/ textural property/ characterization分类
化学化工引用本文复制引用
周旭平,赵谦,吴多林,纪美茹,姜廷顺..硅/钴摩尔比对MCM-48介孔分子筛结构性能的影响[J].硅酸盐学报,2011,39(6):995-999,5.基金项目
江苏省高校自然科学基金(09KJD150002)及苏大学高级人才基金(06JDCJ074)资助项目. （09KJD150002）
