【摘要】 新型层柱微孔材料─ＧａＷ_９Ｚ_３(Ｚ＝Ｃｏ^２＋，Ｆｅ^３＋)柱撑ＺｎＡｌ阴离子粘土的合成、表征及催化性能的研究张继余，余新武，张淑云，胡长文，梁兆君，王恩波（东北师范大学化学系，长春１３００２４）关键词阴离子粘土，杂多化合物，过渡金属，催化性...更多还原

【Abstract】 The tungstogallic heteropolyanions trisubstituted with transition metal cobalt and ferrum GaW₉Z₃ （Z=Co￣（2+）,Fe￣（3+）） have been incorporated into the interlayer of ZnAl-NO₃ type anion clay by means of hydrothermal ion-exchange for the first time in this paper. The layered microporous materials were characterized by XRD,IR,elementary analysis and DTA. Powder X-ray diffraction shows that the aion clay precursor possesses a regular layered structure and a good crystallinity,a nd the pillared derivatives are provided with gallery heights of 0.99±0.01 nm,IR spectra exhibit that the vibration frequencies of heteropolyanions existing in the layered regions of anion clay were similar to those of the authentic heteropoly salts,so we can draw the conclusion that Keggin structure of the gallery heteropolyanions is maintained. Besides,the characteristic peak of at 1384 cm￣（-1）disappeared,it indicated the intercalation reactions carried out completely.This conclusion is identical with that of XRD and elementary analysis. DTA illustrated that the stability order is:ZnAl-GaW₉Fe₃>ZnAl-GaW₉Co₃>GaW₉Fe₃>GaW₉Co₃>Znal-NO₃.Catalytical tests exhibit that the intercalated derivatives have higher catalytic activity and very high selectivity for esterification reaction of phthalic anhydride with 2-ethyl hexanol.更多还原