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Localisation of iron ions in NH4,Na-Y zeolite: A Mössbauer effect study

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Abstract

Localisation of Fe ions in deep-bed treated NH4,Na-Y zeolite at 830K, 940K, and 1050K, as well as after reduction by hydrogen, and dealumination with subsequent calcination is studied by57Fe Mössbauer spectroscopy. Most of the incorporated iron is present in the form of octahedrally coordinated ferric species with two distinct sets of hyperfine parameters assigned to atoms inside the zeolite structure and in extraframework positions. Fe2+ ions with high coordination are also detected and their amount increases with the temperature of deep-bed treatment. Low-temperature Mössbauer effect measurements at 77K and 4.2K were employed to facilitate the identification of iron sites.

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Author notes

  1. M. Miglierini

    Present address: Faculté de Sciences, Laboratoire de Physique de l’Etat Condensé URA CNRS 807, Université du Maine, 72017, Le Mans, France

Authors and Affiliations

  1. Department of Nuclear Physics and Technology, Slovak Technical University, Ilkovičova 3, 81219, Bratislava, Slovakia

    M. Miglierini

  2. Faculty of Chemical Technology, Slovak Technical University, Radlinského 9, 81237, Bratislava, Slovakia

    P. Hudec & A. Smiešková

Authors
  1. M. Miglierini
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  2. P. Hudec
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  3. A. Smiešková
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Miglierini, M., Hudec, P. & Smiešková, A. Localisation of iron ions in NH4,Na-Y zeolite: A Mössbauer effect study. Czech J Phys 47, 541–546 (1997). https://doi.org/10.1023/A:1021211507459

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  • DOI: https://doi.org/10.1023/A:1021211507459

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