The growth and surface properties of boehmite nanofibres and nanotubes at low temperatures using a hydrothermal synthesis route
Frost, Ray L., Zhao, Yanyan, Martens, Wayde N., & Zhu, Huai Yong (2007) The growth and surface properties of boehmite nanofibres and nanotubes at low temperatures using a hydrothermal synthesis route. Langmuir, 23(19), pp. 9850-9859.
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The growth of boehmite nanostructures at low temperature using a soft chemistry route with and without (PEO) surfactant is presented. Remarkably long boehmite one dimensional nanotubes/nanofibres were formed within a significantly short time by changing the reaction mechanism of aluminium hydroxide. By using the surfactant PEO as a templating agent, boehmite nanotubes up to 170 nm in length with internal and external diameter of 2~5 nm and 3~7 nm, were formed at 100 degrees Celsius. A slightly higher temperature (120 degrees Celsius) resulted in the formation of lath-like nanofibres with average length of 250 nm. Using the cationic surfactant CTAB, nanotubes rather than nanofibres were formed at 120 degrees Celsius. Without surfactant, nanotubes counted for around 20 % of the entire sample. A regular interval supply of fresh boehmite precipitate resulted in a larger crystallite size distribution of nanotubes. The morphology of nanotubes was more uniform in samples without the regular addition of aluminium hydroxide. Moreover, with the same hydrothermal time, the final nanotubes for nanomaterials without a regular interval supply of fresh aluminium hydroxide precipitate was longer than with regular aluminium hydroxide precipitate supply which is in contrast to previously published results. Higher Al/PEO concentrations resulted in the formation of shorter nanotubes. Detailed characterisation and mechanism are presented.
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|Item Type:||Journal Article|
|Additional Information:||This article is freely available from the American Chemical Society website 12 months after the publication date. See links to publisher website in this record.|
|Keywords:||boehmite, nanofibres, nanotubes, hydrothermal treatment|
|Subjects:||Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)|
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Structural Chemistry and Spectroscopy (030606)
Australian and New Zealand Standard Research Classification > CHEMICAL SCIENCE (030000) > PHYSICAL CHEMISTRY (INCL. STRUCTURAL) (030600) > Colloid and Surface Chemistry (030603)
|Divisions:||Past > QUT Faculties & Divisions > Faculty of Science and Technology|
Current > Research Centres > Science Research Centre
|Copyright Owner:||Copyright 2007 American Chemical Society|
|Copyright Statement:||The contents of this journal can be freely accessed online via the ACS web page 12 months after publication. See hypertext link.|
|Deposited On:||27 Aug 2007|
|Last Modified:||25 Feb 2013 12:51|
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