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Synthesis and thermal stability of hydrotalcites based upon gallium

Grand, Laure-Marie, Palmer, Sara J., & Frost, Ray L. (2010) Synthesis and thermal stability of hydrotalcites based upon gallium. Journal of Thermal Analysis and Calorimetry, 101(1), pp. 195-198.

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Abstract

Hydrotalcites based upon gallium as a replacement for aluminium in hydrotalcite over a Mg/Al ratio of 2:1 to 4:1 were synthesised. The d(003) spacing varied from 7.83 A ° for the 2:1 hydrotalcite to 8.15 A ° for the 3:1 gallium containing hydrotalcite. A comparison is made with the Mg Al hydrotalcite in which the d(003) spacing for the Mg/Al hydrotalcite varied from 7.62 A ° for the 2:1Mg hydrotalcite to 7.98 A ° for the 4:1 hydrotalcite. The thermal stability of the gallium containing hydrotalcite was determined using thermogravimetric analysis. Four mass loss steps at 77, 263–280,485 and 828 degrees C with mass losses of 10.23, 21.55, 5.20 and 7.58% are attributed to dehydration, dehydroxylation and decarbonation. The thermal stability of the galliumcontaining hydrotalcite is slightly less than the aluminium hydrotalcite.

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ID Code: 47544
Item Type: Journal Article
Keywords: Hydrotalcite, Hydrocalumite, Gallium, Synthesis, Thermal stability
DOI: 10.1007/s10973-009-0456-y
ISSN: 1388-6150
Subjects: 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 2009 Akade´miai Kiado´, Budapest, Hungary
Copyright Statement: The original publication is available at SpringerLink http://www.springerlink.com
Deposited On: 09 Dec 2011 07:21
Last Modified: 06 May 2014 09:47

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