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.
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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|Item Type:||Journal Article|
|Keywords:||nanoparticles, hydrothermal synthesis, pore plates, boehmite, alumina, morphology, surfactant, micelles|
|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 02:52|
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