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Infrared spectroscopy of goethite dehydroxylation: III. FT-IR microscopy of in situ study of the thermal transformation of goethite to hematite

Ruan, Huada, Frost, Ray L., Kloprogge, J. Theo, & Duong, Loc (2002) Infrared spectroscopy of goethite dehydroxylation: III. FT-IR microscopy of in situ study of the thermal transformation of goethite to hematite. Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 58(5), pp. 967-981.

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Abstract

Fourier transform infrared microscopy has been used to investigate in situ dehydroxylation of goethite to form hematite. The characterisation was based on the behaviour of hydroxyl units, which were observed in the hydroxyl stretching and hydroxyl deformation and water bending regions, and the Fe–O vibrations of the newly formed hematite during the thermal dehydroxylation process. Two hydroxyl stretching modes (ν1 and ν2), and three bending (νbending-1, 2, 3) and two deformation (νdeformation-1, 2) modes were observed for goethite. The characteristic vibration at 916 cm−1 was observed together with the residuals of the ν1 and ν2 bands in hematite spectrum. The structural transformation between goethite and hematite through thermal dehydroxylation was interpreted in order to provide criteria that can be used for the characterisation of thermally activated bauxite and their conversion to activated alumina phases.

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ID Code: 22931
Item Type: Journal Article
Additional URLs:
DOI: 10.1016/S1386-1425(01)00574-1
ISSN: 1386-1425
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > ANALYTICAL CHEMISTRY (030100)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2002 Elsevier
Deposited On: 17 Jun 2009 23:30
Last Modified: 03 Sep 2009 11:15

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