物理化学学报 >> 2001, Vol. 17 >> Issue (01): 1-4.doi: 10.3866/PKU.WHXB20010101

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有机官能化MSU-x孔分子筛的界面特征

巩雁军;李志宏;吴东;孙予罕   

  1. 中国科学院山西煤炭化学研究所,煤转化国家重点实验室,太原 030001
  • 收稿日期:2000-07-20 修回日期:2000-10-25 发布日期:2001-01-15
  • 通讯作者: 孙予罕 E-mail:SKLCC@public.ty.sx.cn

Interface Characteristics of Organo-MSU-x Silica

Gong Yan-Jun;Li Zhi-Hong;Wu Dong;Sun Yu-Han   

  1. State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences, Taiyuan 030001
  • Received:2000-07-20 Revised:2000-10-25 Published:2001-01-15
  • Contact: Sun Yu-Han E-mail:SKLCC@public.ty.sx.cn

关键词: 介孔分子筛, 有机官能化MSU-x, 界面特征, 表征

Abstract: 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.

Key words: Mesoporous molecular sieves, Organo-MSU-x, Interface characteristic,  Characterization