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Nanosized composites of synthetic zeolites and silver iodide as potentially electrochemically active materials

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Abstract

Zeolitic composite materials made up of silver iodide and potassium form of synthetic zeolites ZSM5 were prepared in different conditions. The composites were characterized by X-ray powder diffraction methods and their electrochemical properties were studied by conductivity measurements. The attention was focused on the composites of synthetic zeolite of ZSM5 and AgI prepared by treating a silver form of synthetic zeolite ZSM5 (Ag-ZSM5) with potassium iodide solution. On the basis of the ac conductivity data it has been inferred that AgI forms a thin conductive crystalline shell on the surface of the K-ZSM5 particles. The sharp conductivity change between 142 and 147 °C is due to AgI undergoing a phase transition from hexagonal to cubic symmetry at 146 °C. The electrochemical properties of the composites depend on the mode of preparation and on the subsequent thermal treatments.

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Acknowledgements

This work was supported by the Slovak Research and Development Agency under the contract No. APVV-51-035505 and the Slovak Grant Agency for Science VEGA grant No. 1/0107/08.

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Authors and Affiliations

  1. Institute of Chemistry, Faculty of Science, P. J. Šafárik University, Moyzesova 11, 041 54, Košice, Slovak Republic

    Mária Reháková & Ľubica Fortunová

  2. Dipartimento di Chimica, Universita di Perugia, Via Elce di Sotto 8, 06123, Perugia, Italy

    Mario Casciola & Manolo Sganappa

  3. Institute of Geotechnics, Slovak Academy of Sciences in Košice, Watsonova 45, 043 53, Košice, Slovak Republic

    Silvia Čuvanová

  4. Development and Research Wadsten, 19150, Sollentuna, Sweden

    Tommy Wadsten

  5. Faculty of Electrical Engineering and Information Technology, Slovak University of Technology, Ilkovičova 3, 812 19, Bratislava, Slovak Republic

    Vladimír Šály & Juraj Packa

  6. Department of Physics, Electrotechnical Faculty, Technical University, Letná 9, 042 00, Košice, Slovak Republic

    Stanislava Nagyová

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  1. Mária Reháková
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  2. Mario Casciola
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  3. Silvia Čuvanová
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  4. Tommy Wadsten
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  5. Vladimír Šály
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  6. Stanislava Nagyová
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  7. Ľubica Fortunová
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  8. Manolo Sganappa
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  9. Juraj Packa
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Correspondence to Mária Reháková.

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Reháková, M., Casciola, M., Čuvanová, S. et al. Nanosized composites of synthetic zeolites and silver iodide as potentially electrochemically active materials. J Incl Phenom Macrocycl Chem 66, 319–325 (2010). https://doi.org/10.1007/s10847-009-9647-1

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  • DOI: https://doi.org/10.1007/s10847-009-9647-1

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