物理化学学报
物理化學學報
물이화학학보
ACTA PHYSICO-CHIMICA SINICA
2001年
1期
1-4
,共4页
巩雁军%李志宏%吴东%孙子军
鞏雁軍%李誌宏%吳東%孫子軍
공안군%리지굉%오동%손자군
介孔分子筛 ,有机官能化MSUx,界面特征 ,表征Interface Characteristics of Organo-MSU-x SilicaGong YanJun(State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001) Li ZhiHong(State Key Laboratory of C
介孔分子篩 ,有機官能化MSUx,界麵特徵 ,錶徵Interface Characteristics of Organo-MSU-x SilicaGong YanJun(State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001) Li ZhiHong(State Key Laboratory of C
개공분자사 ,유궤관능화MSUx,계면특정 ,표정Interface Characteristics of Organo-MSU-x SilicaGong YanJun(State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001) Li ZhiHong(State Key Laboratory of C
Organically modified MSU-x mesophases containing phenyl,ureidopropyl and methyl along with phenyl two moieties were directly prepared by one-pot synthesis method. Their texture and surface properties were characterized by means of XRD, HRTEM, FT-IR, N2 adsorption/desorption, 29Si CPMAS NMR、13C CPMAS NMR and the microscopic structure was also characterized by small angle X-ray scattering (SAXS) using synchrotron radiation as X-ray source. The results showed that SAXS profiles were hardly constant with Porod′ s law showing a negative slope, i.e. negative deviations (see fig.3). This suggested that the organic groups covalently linked with the matrix of mesoporous silica formed an interfacial layers, which led to the scattering of the pore distortion and gave a negative diviation from Porod′s law. The average thickness of the interfacial layer in each sample was further obtained by analyzing this deviation. SAXS analysis also showed that the organically functionalized MSU-X displayed mass fractal and the uniform distribution of the organic groups within the mesoporous channels, implying that it′ s formation was a non-equilibrium and non-linear process.
