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Thermo-Raman spectroscopy of selected layered double hydroxides of formula Cu6Al2(OH)16CO3 and Zn6Al2(OH)16CO3

Frost, Ray L., Soisnard, Aurore, Voyer, Nicolas, Palmer, Sara J., & Martens, Wayde N. (2009) Thermo-Raman spectroscopy of selected layered double hydroxides of formula Cu6Al2(OH)16CO3 and Zn6Al2(OH)16CO3. Journal of Raman Spectroscopy, 40(6), pp. 645-649.

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Abstract

Raman spectroscopy using a hot stage has been used to characterise layered double hydroxides (LDHs) of formula (Cu,Zn)6Al2(OH)16(CO3).4H2O. The spectra have been used to assess the molecular assembly of the cations in the LDH structure. The sharp band at 1058 cm-1 for the Zn6Al2(OH)16(CO3).4H2O is assigned to the ν1 CO32- symmetric stretching mode. The band shifts to higher wavenumbers and is observed at 1103 cm-1 at 600°C. It is proposed that metal carbonate species formed during the decomposition of the hydrotalcite structure is responsible for the increase in band position. The Cu-Al hydrotalcite did not show the same trend. The symmetric stretching mode of carbonate is observed at around 1110 cm-1, and at temperatures above 200 ºC a shoulder appears at around 1210 cm-1, suggested to be due to CuCO3.

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ID Code: 21243
Item Type: Journal Article
Additional URLs:
Keywords: dehydration, dehydroxylation, hydrotalcite, layered double hydroxide, hot stage Raman spectroscopy, infrared spectroscopy
DOI: 10.1002/jrs2148
ISSN: 0377-0486
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Colloid and Surface Chemistry (030603)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Past > Schools > School of Physical & Chemical Sciences
Copyright Owner: Copyright 2009 John Wiley & Sons
Deposited On: 17 Jun 2009 15:31
Last Modified: 06 May 2014 09:45

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