The ageing of alumina hydrolysates synthesized from sec-butoxyaluminium(III)

Martens, Wayde N., Frost, Ray L., Bartlett, John, & Kloprogge, J. Theo (2001) The ageing of alumina hydrolysates synthesized from sec-butoxyaluminium(III). Journal of Materials Chemistry, 11(6), pp. 1681-1686.

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Abstract

A combination of X-ray diffraction, thermal analysis and Raman spectroscopy was employed to characterise the ageing of alumina hydrolysates synthesised from the hydrolysis of anhydrous tri-sec-butoxyaluminium(III). X-Ray diffraction showed that the alumino-oxy(hydroxy) hydrolysates were pseudoboehmite. For boehmite the lamellar spacings are in the b direction and multiple d(020) peaks are observed for the un-aged hydrolysate. After 4 h of ageing, a single d(020) peak is observed at 6.53 Å. Thermal analysis showed five endotherms at 70, 140, 238, 351 and 445°C. These endotherms are attributed to the dehydration and dehydroxylation of the boehmite-like hydrolysate. Raman spectroscopy shows the presence of bands for the washed hydrolysates at 333, 355, 414, 455, 475, 495, 530 and 675 cm–1. These bands are attributed to pseudoboehmite. Ageing of the hydrolysates results in an increase in the crystallite size of the pseudoboehmite.

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ID Code: 23319
Item Type: Journal Article
Refereed: Yes
Additional URLs:
DOI: 10.1039/b010119m
ISSN: 0959-9428
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2001 Royal Society of Chemistry
Deposited On: 17 Jun 2009 13:50
Last Modified: 10 Aug 2011 13:11

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