Acta Phys. -Chim. Sin. ›› 1995, Vol. 11 ›› Issue (04): 302-307.doi: 10.3866/PKU.WHXB19950404

• ARTICLE • Previous Articles     Next Articles

Study on State of Vanadium in V-ZSM-5 Zeolites

Zhang Chun-Lei,Wu Zhi-Yun   

  1. Department of Chemistry,Jilin University,Changchun 130023, China
  • Received:1994-01-15 Revised:1994-05-21 Published:1995-04-15
  • Contact: Wu Zhi-Yun

Abstract:

V-ZSM-5 zeolites with various Si/V ratios have been synthesized, and the state of vanadium in zeolites was studied by XPS, ESR, TPR and DRS techniques. The results indicate that each of them has two forms-the nonframework vanadium highly dispersed in the zeolite (consisting of vanadiums on outer surface and in pore) and the framework vanadium in zeolite.

Key words: V-ZSM-5, State, Valence, Framework, ESR, UV-DRS