摘要
采用一种“改进的二次晶化”的方法处理介孔二氧化硅SBA-15.用X射线衍射(XRD)、透射电镜(TEM)、电子衍射(ED)、红外光谱(FTIR)以及固体核磁共振(NMR)等多种技术对样品进行了表征.结果表明,在所得样品的孔壁中,原子的排列方式与普通介孔二氧化硅材料的孔壁不同,显示一定程度的有序性.同时,高度有序的介孔结构得到很好的保持,且样品的水热稳定性大幅度提高.
An ＂improved secondary crystallization＂ method was firstly proposed to treat mesoporous silica SBA-15. The results of various characterization including XRD, TEM, ED, FTIR and NMR indicate that in the obtained material, the connection of framework atoms are ordered in certain degree, which is different from the conventional amorphous pore wall. Moreover, the highly ordered mesostructure is well maintained via this method. The obtained material shows much better hydrothermal stability than conventional SBA-15.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
2006年第2期208-211,共4页
Chemical Journal of Chinese Universities
基金
国家"九七三"计划项目(批准号:G2000077507)
国家自然科学基金(批准号:29873017
20101004)资助
关键词
介孔材料
二次晶化
水热稳定性
Mesoporous material
Secondary crystallization
Hydrothermal stability
