Mössbauer effect studies of coordination and oxidation-reduction properties of Eu ions in zeolites

Xuewu Liu, Jiayue Sun

Research output: Contribution to journalArticle

Abstract

Zeolites exchanged with Eu3+ ions were prepared based on three kinds of zeolite hosts: A zeolite, X zeolite, and Y zeolite. The 152Eu Mössbauer effect was used to study the coordination properties of Eu3+ ions in these zeolites. The results showed that EU3+ ions occupy two sites where the electric-field gradient tensors are axially symmetric. The isomer shift and quadrupole splitting of Mössbauer spectra of Eu depend on the electronegativity of the zeolite hosts. With moderate conditions (less than 720°C), the Eu3+ ions in the three kinds of zeolites were reproduced to Eu2+ ions. The coordination property and the stability of the Eu2+ were also studied with 151Eu Mössbauer effect spectroscopy. The results indicated that the symmetry of the electric-field gradient at the Eu site is lowered.

Original languageEnglish (US)
Pages (from-to)600-602
Number of pages3
JournalZeolites
Volume14
Issue number7
DOIs
StatePublished - Jan 1 1994

Keywords

  • Eu Mössbauer effect
  • Eu cation
  • Zeolite

ASJC Scopus subject areas

  • Environmental Science(all)

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