摘要
报导了纳米介孔分子筛ＭＣＭ－４１的微波辐射合成法，运用ＸＲＤ、ＨＲＴＥＭ、ＩＲ、ＴＧ、荧光光谱和低温Ｎ２吸附等技术对其进行了表征．研究结果表明，利用微波技术合成ＭＣＭ－４１，操作便利，节能省时．所得产物具有六方介孔排列结构，孔径约２．５ｎｍ；颗粒大小分布均匀，平均粒径约４０ｎｍ；比表面积和孔隙率高，吸附量大，热稳定性好；在近紫外光激发下，显示出纳米粒子的量子发光效应．
A rapid synthesis of mesoporous molecular sieve MCM-41 with nanometer size by sol-gel method under microwave radiation heating is reported. The effect of different factors, such as raw materials ratio, acidity, power and duration of microwave radiation employed in crystallization and removal of organic template processes on the morphology of the products was systemically investigated and the optimum reaction conditions were also selected. The resulting samples were characterized with such techniques as XRD, HRTEM, IR, TG, photoluminescence spectroscopy and N2 adsorption isotherm, etc. The results showed that reaction time and energy required in the synthesis of MCM-41 mesophase by microwave radiation method were greatly reduced in contrast with those needed by hydrothermal method. The samples, which displayed a hexagonal mesostructure with short-range order having pore diameter of about 2. 5 nm exhibited a photoluminescence effect due to the nanometer-diameter crystallites (about 40 nm, see Fig. 2-3). The as-prepared MCM-41 mesoporous molecular sieve was found to possess a huge surface area, pore volume and good thermal stability (see Table 3).
出处
《物理化学学报》
SCIE
CAS
CSCD
北大核心
2001年第12期1117-1121,共5页
Acta Physico-Chimica Sinica
基金
广州市科技重点攻关计划基金资助项目(2000-Z-076-01)
