Synthesis of iron-containing montmorillonite by various methods. Characterization of the intercalants and the behaviour of the intercalated substances in acid-catalyzed reactions

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Abstract

Substituting Fe for Al in the Al13O40 7+ Keggin ion was attempted and the incorporation of the resulted moieties in Na-montmorillonite was performed. The Keggin ion sulfates, the pillared structures as well as the Fe ion-exchanged clay materials were scrutinized by X-ray diffractometry, X-ray fluorescence, 57Fe Mössbauer, mid and far FT-IR spectroscopies. The pillared and the ion-exchanged materials were also studied by BET surface measurements and thermogravimetry. The acidity of the solids was investigated by pyridine adsorption followed by IR spectroscopy and various acid-catalyzed reactions. It was found that aluminium was not substituted by iron, however, above a certain concentration polynuclear iron (II, III) hydrous oxides crystallized together with the Keggin ion sulfate. Iron could be incorporated in the ion-exchanged and the pillared materials also in the form of polynuclear hydrous oxide species. The main effect of this incorporation was the considerable increase in the acidity of the resulting substances.

Original languageEnglish
Pages (from-to)63-70
Number of pages8
JournalStudies in Surface Science and Catalysis
Volume94
Issue numberC
DOIs
Publication statusPublished - 1995

Fingerprint

Bentonite
montmorillonite
Clay minerals
Iron
Ions
iron
acids
Acids
synthesis
ions
Acidity
acidity
Oxides
Sulfates
Infrared spectroscopy
sulfates
oxides
Surface measurement
thermogravimetry
Aluminum

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Catalysis
  • Physical and Theoretical Chemistry
  • Materials Chemistry
  • Surfaces, Coatings and Films

Cite this

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title = "Synthesis of iron-containing montmorillonite by various methods. Characterization of the intercalants and the behaviour of the intercalated substances in acid-catalyzed reactions",
abstract = "Substituting Fe for Al in the Al13O40 7+ Keggin ion was attempted and the incorporation of the resulted moieties in Na-montmorillonite was performed. The Keggin ion sulfates, the pillared structures as well as the Fe ion-exchanged clay materials were scrutinized by X-ray diffractometry, X-ray fluorescence, 57Fe M{\"o}ssbauer, mid and far FT-IR spectroscopies. The pillared and the ion-exchanged materials were also studied by BET surface measurements and thermogravimetry. The acidity of the solids was investigated by pyridine adsorption followed by IR spectroscopy and various acid-catalyzed reactions. It was found that aluminium was not substituted by iron, however, above a certain concentration polynuclear iron (II, III) hydrous oxides crystallized together with the Keggin ion sulfate. Iron could be incorporated in the ion-exchanged and the pillared materials also in the form of polynuclear hydrous oxide species. The main effect of this incorporation was the considerable increase in the acidity of the resulting substances.",
author = "I. Kiricsi and {\'A} Moln{\'a}r and I. P{\'a}link{\'o} and K. L{\'a}z{\'a}r",
year = "1995",
doi = "10.1016/S0167-2991(06)81207-3",
language = "English",
volume = "94",
pages = "63--70",
journal = "Studies in Surface Science and Catalysis",
issn = "0167-2991",
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TY - JOUR

T1 - Synthesis of iron-containing montmorillonite by various methods. Characterization of the intercalants and the behaviour of the intercalated substances in acid-catalyzed reactions

AU - Kiricsi, I.

AU - Molnár, Á

AU - Pálinkó, I.

AU - Lázár, K.

PY - 1995

Y1 - 1995

N2 - Substituting Fe for Al in the Al13O40 7+ Keggin ion was attempted and the incorporation of the resulted moieties in Na-montmorillonite was performed. The Keggin ion sulfates, the pillared structures as well as the Fe ion-exchanged clay materials were scrutinized by X-ray diffractometry, X-ray fluorescence, 57Fe Mössbauer, mid and far FT-IR spectroscopies. The pillared and the ion-exchanged materials were also studied by BET surface measurements and thermogravimetry. The acidity of the solids was investigated by pyridine adsorption followed by IR spectroscopy and various acid-catalyzed reactions. It was found that aluminium was not substituted by iron, however, above a certain concentration polynuclear iron (II, III) hydrous oxides crystallized together with the Keggin ion sulfate. Iron could be incorporated in the ion-exchanged and the pillared materials also in the form of polynuclear hydrous oxide species. The main effect of this incorporation was the considerable increase in the acidity of the resulting substances.

AB - Substituting Fe for Al in the Al13O40 7+ Keggin ion was attempted and the incorporation of the resulted moieties in Na-montmorillonite was performed. The Keggin ion sulfates, the pillared structures as well as the Fe ion-exchanged clay materials were scrutinized by X-ray diffractometry, X-ray fluorescence, 57Fe Mössbauer, mid and far FT-IR spectroscopies. The pillared and the ion-exchanged materials were also studied by BET surface measurements and thermogravimetry. The acidity of the solids was investigated by pyridine adsorption followed by IR spectroscopy and various acid-catalyzed reactions. It was found that aluminium was not substituted by iron, however, above a certain concentration polynuclear iron (II, III) hydrous oxides crystallized together with the Keggin ion sulfate. Iron could be incorporated in the ion-exchanged and the pillared materials also in the form of polynuclear hydrous oxide species. The main effect of this incorporation was the considerable increase in the acidity of the resulting substances.

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U2 - 10.1016/S0167-2991(06)81207-3

DO - 10.1016/S0167-2991(06)81207-3

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VL - 94

SP - 63

EP - 70

JO - Studies in Surface Science and Catalysis

JF - Studies in Surface Science and Catalysis

SN - 0167-2991

IS - C

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