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Novel Synthesis of Aluminium Oxide Nanofibers

Published online by Cambridge University Press:  15 March 2011

Huai. Y. Zhu  and
Gao. Q. Lu
Huai. Y. Zhu
Affiliation:
Nanomaterials Centre and Department of Chemical Engineering, The University of Queensland, Brisbane, 4072, Australia
Gao. Q. Lu
Affiliation:
Nanomaterials Centre and Department of Chemical Engineering, The University of Queensland, Brisbane, 4072, Australia
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Abstract

This report presents a novel synthesis method of alumina nanofibers at moderate conditions in aqueous systems through a surfactant-directed crystal growth process. In the presence of polyethylene oxide (PEO) surfactants, boehmite nanofibers of about 3 nm thick and 30-60 nm long formed from aluminium hydrate colloids. During the subsequent heating, the surfactant was evaporated and boehmite nanofibers were converted into γ-alumina nanofibers. The function of the PEO surfactant and the formation mechanism of the nanofibers are discussed. Alumina nanofibers are an ideal structural reinforcement for various nanocomposite materials. They are potential adsorbents with high adsorption capacity. Furthermore, their unique structure exhibits strong resistance to heating at high temperatures. The BET surface area of a typical sample after heating at 1200°C is as high as 68 m2/g. This makes the material very promising as excellent substrates for catalysts of high thermal stability.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 703: Symposia U/V – Nanophase and Nanocomposite Materials IV , 2001 , V1.8
Copyright
Copyright © Materials Research Society 2002

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