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Thermally induced transformations in polyoxometalate-pillared hydrotalcites

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Abstract

Thermal decomposition of magnesium-aluminum hydrotalcites intercalated with four different polyoxometalate anions (V10O28 6−,Cr2O7 2−, W7O24 6−or Mo7O24 6−) was examined. The studied samples were prepared by the ion-exchange procedure starting from the parent carbonate-containing hydrotalcite. The successful synthesis was confirmed by powder X-ray diffraction and chemical analysis. The samples decomposed in two or three essential steps forming finally mixed metal oxides. The dichromate-containing hydrotalcite showed a thermal reduction of Cr6+ to Cr3+ ions.

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Authors and Affiliations

  1. Faculty of Chemistry, Jagiellonian University Ingardena 3, 30-060, Cracow, Poland

    P. Kustrowski, A. Wegrzyn, L. Chmielarz, A. Bronkowska & A. Rafalska-Lasocha

  2. Regional Laboratory for Physicochemical Analyses and Structural Research Ingardena 3, 30-060, Cracow, Poland

    R. Dziembaj

Authors
  1. P. Kustrowski
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  2. A. Wegrzyn
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  3. L. Chmielarz
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  4. A. Bronkowska
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  5. A. Rafalska-Lasocha
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  6. R. Dziembaj
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Correspondence to P. Kustrowski.

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Kustrowski, P., Wegrzyn, A., Chmielarz, L. et al. Thermally induced transformations in polyoxometalate-pillared hydrotalcites. Journal of Thermal Analysis and Calorimetry 77, 243–251 (2004). https://doi.org/10.1023/B:JTAN.0000033209.63864.0e

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  • DOI: https://doi.org/10.1023/B:JTAN.0000033209.63864.0e

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