化学学报 ›› 1994, Vol. 52 ›› Issue (6): 573-577. 上一篇    下一篇

研究论文

疏水硅沸石Silicalite-I)结构性质的表征

孙尧俊;黄月芳;吴泰琉;王力平;费伦;杨海;龙英才   

  1. 复旦大学分析测试中心;复旦大学化学系
  • 出版日期:1994-06-15 发布日期:1994-06-15

Structural characterization of hydrophobic zeolite silicalite-I

SUN YAOJUN;HUANG YUEFANG;WU TAILIU;WANG LIPING;FEI LUN;YANG HAI;LONG YINGCAI   

  • Online:1994-06-15 Published:1994-06-15

用粉末XRD, FT-IR, 29^Si MAS NMR, 对高硅HZSM-5沸石及疏水硅沸石Silicalite I进行结构性质表征。在室温下, 疏水硅沸石具有ZSM-5的单斜对称性。它的红外骨架振动谱及高分辨29^Si固体核磁共振谱均显示出高的分辨率。在红外光谱中, 3700和3500cm^-1左右的表面Si-OH基振动消失。表明疏水硅沸石晶格中的[SiO~4]四面体排列完美。由-Si-O-Si-构成的微也表面, 具有优良的疏水性。

关键词: 红外分光光度法, X射线衍射分析, 硅化合物, 疏水性, 付里叶变换, 硅沸石

High Si zeolite H-ZSM-5 and hydrophobic zeolite silicalite-I were characterized by powder XRD, FT-IR and 29Si MAS nmr. Hydrophobic zeolite silicalite-I possesses a monoclinic symmetry at room temperature The facts that high resoln. of IR spectra for framework vibration and 29Si MAS NMR spectra, and the loss of Si-OH IR vibration at 3450 and 3730 cm-1 prove a perfect arrangement of [SiO4] tetrahedra in the cell of silicalite-I.

Key words: INFRARED SPECTROPHOTOMETRY, X-RAY DIFFRACTION ANALYSIS, SILICON COMPOUNDS, HYDROPHOBILITY, FOURIER TRANSFORM, SILICALITE

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