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Raman spectroscopy at temperatures between 298 and 423 K and at 77 K of kaolinites intercalated with formamide
Queensland University of Technology.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.ORCID iD: 0000-0001-9794-8305
Queensland University of Technology.
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1998 (English)In: Journal of Raman Spectroscopy, ISSN 0377-0486, E-ISSN 1097-4555, Vol. 29, no 12, p. 1065-1069Article in journal (Refereed) Published
Abstract [en]

Raman spectra of kaolinite and of the formamide-intercalated kaolinite were obtained at both 298 and 77 K using a Raman microprobe equipped with a thermal stage. Upon cooling to 77 K, the band attributed to the inner hydroxyl shifts by 5 cm-1 to lower wavenumbers and the bands assigned to the inner surface hydroxyls move to higher wavenumbers. Upon intercalation of the kaolinite with formamide, an additional Raman band attributed to the formation of a hydrogen-bonded complex between the inner surface hydroxyls and the carbonyl group of the formamide is observed at 3627 cm-1 at 298 K and at 3631 cm-1 at 77 K. Raman spectra of the deintercalation of the formamide-intercalated kaolinite are obtained by using the thermal stage to heat the intercalated kaolinite in situ. A decrease in intensity of the bands formed through intercalation and at the same time an increase in intensity of the inner surface hydroxyl bands are observed. A loss of intensity of the low-wavenumber region of the formamide-intercalated kaolinite is also observed.

Place, publisher, year, edition, pages
1998. Vol. 29, no 12, p. 1065-1069
National Category
Physical Chemistry
Research subject
Physical Chemistry
Identifiers
URN: urn:nbn:se:ltu:diva-5540DOI: 10.1002/(SICI)1097-4555(199812)29:123.0.CO;2-ELocal ID: 3aa92ab0-1da4-11dd-8384-000ea68e967bOAI: oai:DiVA.org:ltu-5540DiVA, id: diva2:978414
Note
Godkänd; 1998; 20080509 (bajo)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-04-05Bibliographically approved

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Forsling, WillisHolmgren, Allan

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