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Nickel-aluminium complex: a simple and effective precursor for nickel aluminate (NiAl2O4) spinel

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Author(s): Apirat Laobuthee

Journal: Maejo International Journal of Science and Technology
ISSN 1905-7873

Volume: 2;
Issue: 01;
Start page: 140;
Date: 2008;
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Keywords: nickel complex | nickel aluminate | spinel | one-pot process

ABSTRACT
A reaction of aluminium hydroxide, nickel nitrate and triethanolamine in ethylene glycol provided, in one step, a simple and effective nickel-aluminium complex precursor for NiAl2O4 spinel. On the basis of 1H-, 13C-NMR spectroscopy, and mass spectrometry, the possible structure of the complex was proposed as a trimetallic double alkoxide consisting of two four-coordinate TEA-Al (alumatrane) moieties linked via a bridging TEA group enfolding the Ni2+ cation. Transformation of the nickel-aluminium complex to pure spinel occurred when the complex precursor was pyrolysed at 1000C for 5 h. The BET surface area of the pyrolysed product was found to be 31 m2/g. In addition, the morphology of the powder product was examined by SEM.

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