【摘要】 通过固体离子交换方法将V引入高硅分子筛HM（氢型丝光沸石）和HZSM-5中。XRD、LRS和BIE表明V₂O₅晶相在HM和HZSM-5表面上消失,并以VO离子形式进入分子筛。吡啶吸附-IR表明VO离子主要与HM、HZSM-5分子筛中的质子发生交换。ESR的两个信号表明进入分子筛的孤立VO离子具有两种不同的配位结构:压缩的八面体六配位和平面四方锥五配位。更多还原

【Abstract】 Vanadium has been introduced into high-silica zeolites by heating the physical mixture of V₂O₅ and H-Mordenite or H-ZSM-5 in an airflow containing water vapor.XRD,LRS,BIE and FTIR results suggest that ion exchange occurs between protonsof zeolite and the （VO）³⁺ formed during preparation. ESR results show these are twodifferent coordination structures for the vanadyl species entered into HM or H-ZSM-5,i.e. The compressed hexacoordinated octahedral and the pentacoordinated with pyra-midic symmetry.更多还原