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Synthesis and spectroscopic characterisation of aurichalcite (Zn,Cu2+)5(CO3)2(OH)6 -implications for Cu-ZnO catalysts

Frost, Ray L., Reddy, B. Jagannadha, & Locke, Ashley (2008) Synthesis and spectroscopic characterisation of aurichalcite (Zn,Cu2+)5(CO3)2(OH)6 -implications for Cu-ZnO catalysts. Transition Metal Chemistry, 33(3), pp. 331-339.

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Abstract

The Cu-ZnO catalysts with variable Cu/Zn ratio, between Zn-rich and Cu-rich compositions have been investigated by a combination of electronic and vibrational spectra. Synthesized catalysts exhibit two d-d transition bands of Cu2+ ions in a distorted octahedral symmetry, at 7600 and 12900 cm-1 (1315 and 775 nm). The effect of structural cations substitution (Zn2+ and Cu2+) on band shifts observed in spectra of the synthetic samples. The observation of two broad features at ~7600 and 12900 cm-1 (1315 and 775 nm) is a strong indication for Zn2+ substitution by Cu2+ ions. The result of multiple bands in the symmetric stretching and bending regions confirms the reduction of symmetry from D3h to C2v/Cs for (CO3)2- ion in aurichalcite. The synthetic aurichalcite may be used as a standard for identification of spectral properties of naturally occurring anhydrous carbonate minerals.

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ID Code: 13188
Item Type: Journal Article
Keywords: Aurichalcite synthesis, Cu, ZnO catalysts, Hydroxy carbonates, UV, Vis, NIR and mid, IR spectroscopy, Electronic spectra of Cu2+, Vibrational modes/overtones and combination bands of OH, and CO32, fundamentals
DOI: 10.1007/s11243-007-9044-9
ISSN: 0340-4285
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > INORGANIC CHEMISTRY (030200) > Transition Metal Chemistry (030207)
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) > INORGANIC CHEMISTRY (030200) > Solid State Chemistry (030206)
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
Copyright Owner: Copyright 2008 Springer
Copyright Statement: The original publication is available at SpringerLink http://www.springerlink.com
Deposited On: 28 Mar 2008
Last Modified: 29 Feb 2012 23:46

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