A DRIFT spectroscopic study of potassium acetate intercalated mechanochemically activated kaolinite

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Abstract

Kaolinite has been mechanochemically activated by dry grinding for periods of time up to 10 h. The kaolinite was then intercalated with potassium acetate and the changes in the structure followed by DRIFT spectroscopy. Intercalation of the kaolinite with potassium acetate is difficult and only the layers, which remain hydrogen bonded, are intercalated. The mechanochemical activation of the kaolinite may be followed by the loss of intensity of the hydroxyl-stretching vibrations. The intensity of the 3695 and 3619 cm-1 bands reach a minimum after 10 h of grinding. The observation of a band at 3602 cm-1 is indicative of the intercalation of the kaolinite with potassium acetate. The degree of intercalation decreases with mechanochemical treatment. The effect of exposure of the intercalated mechanochemically activated kaolinite to moist air results in de-intercalation. The effect of the mechanochemical treatment is loss of layer stacking, which prevents the intercalation of the kaolinite.

Original languageEnglish
Pages (from-to)1183-1194
Number of pages12
JournalSpectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy
Volume59
Issue number6
DOIs
Publication statusPublished - Apr 2003

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Potassium Acetate
Kaolin
kaolinite
Kaolinite
Potassium
acetates
potassium
Intercalation
intercalation
grinding
Hydroxyl Radical
Stretching
Hydrogen
Chemical activation
Spectroscopy
activation
vibration
air

Keywords

  • DRIFT spectroscopy
  • Intercalation
  • Kaolinite
  • Mechanochemical activation
  • Raman microscopy
  • XRD

ASJC Scopus subject areas

  • Spectroscopy

Cite this

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title = "A DRIFT spectroscopic study of potassium acetate intercalated mechanochemically activated kaolinite",
abstract = "Kaolinite has been mechanochemically activated by dry grinding for periods of time up to 10 h. The kaolinite was then intercalated with potassium acetate and the changes in the structure followed by DRIFT spectroscopy. Intercalation of the kaolinite with potassium acetate is difficult and only the layers, which remain hydrogen bonded, are intercalated. The mechanochemical activation of the kaolinite may be followed by the loss of intensity of the hydroxyl-stretching vibrations. The intensity of the 3695 and 3619 cm-1 bands reach a minimum after 10 h of grinding. The observation of a band at 3602 cm-1 is indicative of the intercalation of the kaolinite with potassium acetate. The degree of intercalation decreases with mechanochemical treatment. The effect of exposure of the intercalated mechanochemically activated kaolinite to moist air results in de-intercalation. The effect of the mechanochemical treatment is loss of layer stacking, which prevents the intercalation of the kaolinite.",
keywords = "DRIFT spectroscopy, Intercalation, Kaolinite, Mechanochemical activation, Raman microscopy, XRD",
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AU - Frost, Ray L.

AU - Kristóf, J.

AU - Makó, E.

AU - Horváth, E.

PY - 2003/4

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N2 - Kaolinite has been mechanochemically activated by dry grinding for periods of time up to 10 h. The kaolinite was then intercalated with potassium acetate and the changes in the structure followed by DRIFT spectroscopy. Intercalation of the kaolinite with potassium acetate is difficult and only the layers, which remain hydrogen bonded, are intercalated. The mechanochemical activation of the kaolinite may be followed by the loss of intensity of the hydroxyl-stretching vibrations. The intensity of the 3695 and 3619 cm-1 bands reach a minimum after 10 h of grinding. The observation of a band at 3602 cm-1 is indicative of the intercalation of the kaolinite with potassium acetate. The degree of intercalation decreases with mechanochemical treatment. The effect of exposure of the intercalated mechanochemically activated kaolinite to moist air results in de-intercalation. The effect of the mechanochemical treatment is loss of layer stacking, which prevents the intercalation of the kaolinite.

AB - Kaolinite has been mechanochemically activated by dry grinding for periods of time up to 10 h. The kaolinite was then intercalated with potassium acetate and the changes in the structure followed by DRIFT spectroscopy. Intercalation of the kaolinite with potassium acetate is difficult and only the layers, which remain hydrogen bonded, are intercalated. The mechanochemical activation of the kaolinite may be followed by the loss of intensity of the hydroxyl-stretching vibrations. The intensity of the 3695 and 3619 cm-1 bands reach a minimum after 10 h of grinding. The observation of a band at 3602 cm-1 is indicative of the intercalation of the kaolinite with potassium acetate. The degree of intercalation decreases with mechanochemical treatment. The effect of exposure of the intercalated mechanochemically activated kaolinite to moist air results in de-intercalation. The effect of the mechanochemical treatment is loss of layer stacking, which prevents the intercalation of the kaolinite.

KW - DRIFT spectroscopy

KW - Intercalation

KW - Kaolinite

KW - Mechanochemical activation

KW - Raman microscopy

KW - XRD

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