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Raman spectroscopy of the transition of α-gallium oxyhydroxide to β-gallium oxide nanorods

Zhao, Yanyan, Yang, Jing, & Frost, Ray L. (2008) Raman spectroscopy of the transition of α-gallium oxyhydroxide to β-gallium oxide nanorods. Journal of Raman Spectroscopy, 39(10), pp. 1327-1331.

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Abstract

The thermo-Raman spectra of synthesised α-gallium oxyhydroxide nanorods proves the transition of α-gallium oxyhydroxide to β-gallium oxide nanorods occurs above 350 degrees Celsius but below 400 degrees Celsius. Scanning electron microscopy proves the morphology of the α-gallium oxyhydroxide nanorods is retained upon calcination to β-gallium oxide. X-ray diffraction shows that the nanorods are α-gallium oxyhydroxide converting upon calcination to β-gallium oxide.
Intense Raman bands are observed at 190, 262, 275, 430, 520, 605 and 695 cm-1 which undergo a red shift of ~5 cm-1 upon heating to 350 degrees Celsius. Upon thermal treatment above 350 degrees Celsius the Raman spectrum shows a significantly different pattern. Raman bands are observed at 155, 212, 280, 430, 570 and 685 cm-1. The thermoRaman spectra are in harmony with the TG and DTG patterns which show the reaction of α-gallium oxyhydroxide to β-gallium oxide occurs at 365 degrees Celsius.

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ID Code: 14942
Item Type: Journal Article
Keywords: Gallium oxide, oxyhydroxide, nanorods, nanofibre, Raman spectroscopy
DOI: 10.1002/jrs.1981
ISSN: 0377-0486
Subjects: 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) > Colloid and Surface Chemistry (030603)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Past > Schools > School of Physical & Chemical Sciences
Copyright Owner: Copyright 2008 John Wiley & Sons
Copyright Statement: The definitive version is available on publication at www3.interscience.wiley.com
Deposited On: 23 Sep 2008
Last Modified: 29 Feb 2012 23:46

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