缓冲体系中高热和水热稳定性的MCM-48介孔分子筛的合成  

Synthesis of Highly Thermally and Hydrothermally Stable MCM-48 in Buffer Solution

作　　者：孔令东[1] 刘苏[2] 颜学武[1] 贺鹤勇[1] 李全芝[1] 

机构地区：[1]复旦大学化学系和上海市分子催化及创新材料实验室,上海200433 [2]复旦大学环境科学与工程系,上海200433

出　　处：《化学学报》2005年第13期1241-1244,i004,共5页Acta Chimica Sinica

基　　金：国家自然科学基金(No.20303005)资助项目

摘　　要：利用混合阳离子-非离子表面活性剂为模板剂在缓冲体系中成功地合成出具有高热和水热稳定性的MCM-48介孔材料.通过XRD,N2吸附-脱附,29SiMASNMR和31PMASNMR等手段对样品进行了表征.结果表明,合成的MCM-48材料具有高的比表面积和高度有序的孔道系统.样品在空气中于900℃下焙烧15h和在600℃100%水蒸气下处理8～10h,仍能保持良好的立方孔道结构,显示很高的热稳定性和极好的水热稳定性.Mesoporous MCM-48 with high thermal and hydrothermal stability has been successfully synthesized in buffer solution by mixed cationic-nonionic surfactant templating pathway. The synthesized material was characterized by XRD, N-2 adsorption-desorption isotherms, Si-29 and P-31 MAS NMR. The characteristic results showed that the MCM-48 material possessed high specific surface areas and well-ordered channel systems. The MCM-48 sample treated with 100% steam at 600 degrees C for 8 similar to 10 h or calcined in air at 900 degrees C for 15 h could still retain its cubic structure, indicating that the sample has high thermal and hydrothermal stability.

关 键 词：MCM-48介孔分子筛 缓冲体系 比表面积 孔道系统 水热稳定性 混合表面活性剂 合成 介孔材料 

分 类 号：TQ424.25[化学工程]