Thermal decomposition and reconstruction of CaFe-layered double hydroxide studied by X-ray diffractometry and 57Fe Mössbauer spectroscopy

Valéria Bugris, Mónika Ádok-Sipiczki, Tamás Anitics, E. Kuzmann, Z. Homonnay, Á. Kukovecz, Z. Kónya, P. Sipos, I. Pálinkó

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4 Citations (Scopus)

Abstract

In spite of numerous investigations on the various processes of the thermal decomposition and rehydration of layered double hydroxides (LDHs) by a variety sophisticated experimental means, many details are still unexplored and some contradictions are still unresolved. In this work, our efforts were focussed on clarifying the composition, structure and properties of thermally decomposed metaphases originating from CaFe-LDH, heat treated in the 373-973 K temperature range. The structure reconstruction ability of mixed metal oxide phases obtained after heat treatments was also investigated, mainly concentrating on the changes in the microenvironment of Fe(III), in the presence of controlled amount of water vapour (i.e., at different relative humidities). All samples were characterised by X-ray diffractometry, and the iron-containing phases were studied by 57Fe Mössbauer spectroscopy.

Original languageEnglish
Pages (from-to)19-24
Number of pages6
JournalJournal of Molecular Structure
Volume1090
DOIs
Publication statusPublished - Jun 15 2015

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Hydroxides
X ray diffraction analysis
Pyrolysis
Spectroscopy
Steam
Oxides
Atmospheric humidity
Iron
Metals
Heat treatment
Chemical analysis
Temperature
hydroxide ion

Keywords

  • Fe Mössbauer spectroscopy
  • Hydrocalumite
  • Layered double hydroxide

ASJC Scopus subject areas

  • Spectroscopy
  • Analytical Chemistry
  • Inorganic Chemistry
  • Organic Chemistry

Cite this

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abstract = "In spite of numerous investigations on the various processes of the thermal decomposition and rehydration of layered double hydroxides (LDHs) by a variety sophisticated experimental means, many details are still unexplored and some contradictions are still unresolved. In this work, our efforts were focussed on clarifying the composition, structure and properties of thermally decomposed metaphases originating from CaFe-LDH, heat treated in the 373-973 K temperature range. The structure reconstruction ability of mixed metal oxide phases obtained after heat treatments was also investigated, mainly concentrating on the changes in the microenvironment of Fe(III), in the presence of controlled amount of water vapour (i.e., at different relative humidities). All samples were characterised by X-ray diffractometry, and the iron-containing phases were studied by 57Fe M{\"o}ssbauer spectroscopy.",
keywords = "Fe M{\"o}ssbauer spectroscopy, Hydrocalumite, Layered double hydroxide",
author = "Val{\'e}ria Bugris and M{\'o}nika {\'A}dok-Sipiczki and Tam{\'a}s Anitics and E. Kuzmann and Z. Homonnay and {\'A}. Kukovecz and Z. K{\'o}nya and P. Sipos and I. P{\'a}link{\'o}",
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T1 - Thermal decomposition and reconstruction of CaFe-layered double hydroxide studied by X-ray diffractometry and 57Fe Mössbauer spectroscopy

AU - Bugris, Valéria

AU - Ádok-Sipiczki, Mónika

AU - Anitics, Tamás

AU - Kuzmann, E.

AU - Homonnay, Z.

AU - Kukovecz, Á.

AU - Kónya, Z.

AU - Sipos, P.

AU - Pálinkó, I.

PY - 2015/6/15

Y1 - 2015/6/15

N2 - In spite of numerous investigations on the various processes of the thermal decomposition and rehydration of layered double hydroxides (LDHs) by a variety sophisticated experimental means, many details are still unexplored and some contradictions are still unresolved. In this work, our efforts were focussed on clarifying the composition, structure and properties of thermally decomposed metaphases originating from CaFe-LDH, heat treated in the 373-973 K temperature range. The structure reconstruction ability of mixed metal oxide phases obtained after heat treatments was also investigated, mainly concentrating on the changes in the microenvironment of Fe(III), in the presence of controlled amount of water vapour (i.e., at different relative humidities). All samples were characterised by X-ray diffractometry, and the iron-containing phases were studied by 57Fe Mössbauer spectroscopy.

AB - In spite of numerous investigations on the various processes of the thermal decomposition and rehydration of layered double hydroxides (LDHs) by a variety sophisticated experimental means, many details are still unexplored and some contradictions are still unresolved. In this work, our efforts were focussed on clarifying the composition, structure and properties of thermally decomposed metaphases originating from CaFe-LDH, heat treated in the 373-973 K temperature range. The structure reconstruction ability of mixed metal oxide phases obtained after heat treatments was also investigated, mainly concentrating on the changes in the microenvironment of Fe(III), in the presence of controlled amount of water vapour (i.e., at different relative humidities). All samples were characterised by X-ray diffractometry, and the iron-containing phases were studied by 57Fe Mössbauer spectroscopy.

KW - Fe Mössbauer spectroscopy

KW - Hydrocalumite

KW - Layered double hydroxide

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