The status of chromium in aluminum-free chromosilicate with the ZSM-5 structure

A. V. Kucherov, A. A. Slinkin, G. K. Beyer, G. Borbely

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

It is shown that the hydrothermal synthesis of aluminum-free chromosilicate results in the formation of crystalline zeolite with the ZSM-5 structure and some Cr3+ ions substitutes isomorphically for Si4+ ions in the lattice of as-made samples. After oxidative calcination most chromium ions aggregate in α-Cr2O3 microcrystals on the outer surface of the zeolite. However, some chromium remains stabilized strongly in the zeolitic structure as isolated low coordinated Cr(V) ions in two discrete coordinative states. It may be supposed that Cr(V) ions chemically bonded with zeolite lattice also have out of lattice ligands and are capable of interacting specifically with different molecules.

Original languageEnglish
Pages (from-to)431-438
Number of pages8
JournalZeolites
Volume15
Issue number5
DOIs
Publication statusPublished - Jun 1995

Keywords

  • Chromosilicate
  • [Cr]ZSM-5
  • redox properties

ASJC Scopus subject areas

  • Environmental Science(all)

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