物理化学学报 >> 1992, Vol. 8 >> Issue (03): 339-344.doi: 10.3866/PKU.WHXB19920311

研究论文 上一篇    下一篇

固体离子交换法将钒引入高硅分子筛

单绍纯; 沈少波; 黄敏明   

  1. 中国科学技术大学近代化学系,合肥 230026
  • 收稿日期:1991-01-28 修回日期:1991-07-11 发布日期:1992-06-15
  • 通讯作者: 单绍纯

Introduction of Vanadium into High-Silica Zeolited by Solid-State ion Exchange

Shan Shao-Chun; Shen Shao-Bo; Huang Min-Ming   

  1. Department of Modera Chemistry, University of Cience and Technology of China, Hefei 230026
  • Received:1991-01-28 Revised:1991-07-11 Published:1992-06-15
  • Contact: Shan Shao-Chun

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V_2O_5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。

关键词: 固体离子交换, V2O5, 分子筛

Abstract: Vanadium has been introduced into high-silica zeolites by heating the physical mixture of V_2O_5 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 protons of zeolite and the (VO)~(3+) formed during preparation. ESR results show these are two different coordination structures for the vanadyl species entered into HM or H-ZSM-5, i.e. The compressed hexacoordinated octahedral and the pentacoordinated with pyramidic symmetry.

Key words: Solid-state Ion-exchange, V2O5, Zeolite