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Manipulating the size and morphology of aluminum hydrous oxide nanoparticles by soft-chemistry approaches

Zhu, Huai Yong, Gao, Xueping, Song, Deying Y., Ringer, Simon, Xi, Yunfei, & Frost, Ray L. (2005) Manipulating the size and morphology of aluminum hydrous oxide nanoparticles by soft-chemistry approaches. Microporous and Mesoporous Materials, 85(3), pp. 226-233.

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Abstract

We demonstrate control of the size and morphology of aluminum hydrate nanoparticles synthesized by a hydrothermal reaction through manipulating pH value of the reaction mixture, hydrothermal temperature and the surfactant used. Porous laths formed under acidic conditions, while the lath-width increased with temperature and single-crystal porous laths were formed. At neutral or high pH values, porous plates of several nanometers thick were obtained. The pore sizes on both laths and plates were ~2-3 nm. Stringy lath-shaped nanoparticles were obtained with polyethylene glycol surfactant. It demonstrates that we can precisely control nanoparticle size and morphology using soft chemical methods. Furthermore, these nanoparticles transformed to y-alumina nanocrystallites after heating to 673K, and retained the morphology of the parent boehmite. We provide a detailed characterization of the nanoparticulates and discuss the mechanism of their formation and subsequent transformation.

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37 citations in Web of Science®

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ID Code: 2242
Item Type: Journal Article
Keywords: nanoparticles, hydrothermal synthesis, pore plates, boehmite, alumina, morphology, surfactant, micelles
DOI: 10.1016/j.micromeso.2005.06.001
ISSN: 1387-1811
Subjects: Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > INORGANIC CHEMISTRY (030200)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Copyright Owner: Copyright 2005 Elsevier
Copyright Statement: Reproduced in accordance with the copyright policy of the publisher.
Deposited On: 11 Jul 2006
Last Modified: 25 Feb 2013 12:52

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