【摘要】 用粉末XRD,FT—IR,²⁹Si 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²⁹Si固体核磁共振谱均显示出高的分辨率.在红外光谱中,3700和3500^-1左右的表面Si-OH基振动消失.表明疏水硅沸石晶格中的[SiO₄]四面体排列完美.由—Si—O—Si—构成的微孔表面,具有优良的疏水性.更多还原

【Abstract】 High silicon 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 resolution of IR spectra for framework vibration and 29Si MAS NMR spectra, and the loss of Si-OH IR vibration at 3450cm-1 and3730cm-1 prove a perfect arrangement of [ SiO4] tetrahedra in cell of silicalite- I .The micropore surface constructed by- Si-O-Si-are good hydrophobia更多还原