Mixed-metal pillared layer clays and their pillaring precursors

István Pálinkó, Árpád Molnár, János B. Nagy, Jean Cristoph Bertrand, Károly Lázár, József Valyon, Imre Kiricsi

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30 Citations (Scopus)

Abstract

Mixed-metal pillared layer clays (Fe,Al-PILCs and Cr,Al-PILCs) of various compositions and the pillaring precursors have been prepared and characterised with a combination of chemical and instrumental methods. Chemical analysis data, IR, 57Mössbauer and 27Al NMR spectroscopic measurements on the precipitated pillaring precursors and comparison of redox behaviour [temperature-programmed reduction (TPR) results and 57Fe Mössbauer measurements on the heat-treated and the reduced samples] of the ion-exchanged and Al-pillared and mixed-metal pillared clays revealed that isomorphous substitution of A1 for Fe or Cr did not occur in either the tetrahedral or the octahedral positions. Heat treatment, however, resulted in mixed-metal pillared clays which were active in both acid-catalysed and redox transformations.

Original languageEnglish
Pages (from-to)1591-1599
Number of pages9
JournalJournal of the Chemical Society - Faraday Transactions
Volume93
Issue number8
DOIs
Publication statusPublished - Apr 21 1997

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry

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