Mixed metal pillared clays and their pillaring precursor

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

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    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, 57 Mössbauer and 27 Al NMR spectroscopic measurements on the precipitated pillaring precursors and comparison of redox behaviour [temperature-programmed reduction (TPR) results and 57 Fe 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 Al 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.
    langue originaleAnglais
    Pages (de - à)1591-1599
    Nombre de pages9
    journalJournal of the Chemical Society, Faraday Transactions
    Numéro de publication8
    Les DOIs
    Etat de la publicationPublié - 1998

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