硅锆层柱蒙脱石的合成及热稳定性

SYNTHESIS AND THERMAL STABILITY OF HYDROXY Si Zr PILLARED INTERLAYERED MONTMORILLONITE

硅锆层柱蒙脱石的合成及热稳定性＊贾定先李栋藩＊＊张盈珍（中国科学院大连化学物理研究所，大连１１６０２３）关键词层柱蒙脱石，合成，硅锆交联柱，热稳定性层柱蒙脱石作为一种新型大孔分子筛型催化材料，近年来一直受到人们的重视．目前对锆层柱蒙脱石已做了很多研究...

A series of hydroxy Si Zr pillared interlayered montmorillonite (SiZr PILM) were prepared from Na montmorillonite by the reaction with copolymerized zirconyl chloride and silica colloid. The results of XRD, BET and DTA show that the thermal stability and surface area of SiZr PILM are higher than those of Zr PILM. Calcinated at 750℃, the retention surface area of SiZr PILM is 76 6% and that of Zr PILM is only 58 6%. The higher thermal stability of SiZr PILM is due to the enhanced interaction between pillar and layer by doping proper amount of silica. In SiZr PILM, the pillar is attached to layer by the Si-O-Al Ⅵ bond instead of Zr-O-Al Ⅵ bond in Zr PILM. The organic solvent and heat treatment of pillaring agent have positive effect on promoting the thermal stability of Zr PILM.