Preparation of aluminum hydroxide and oxide nanostructures with controllable morphology by wet oxidation of AlN/Al nanoparticles
- Institute of Strength Physics and Materials Science of Siberian Branch of Russian Academy of Sciences (ISPMS SB RAS), Tomsk (Russian Federation)
- Department of Mechanical Engineering, Ort Braude College, Karmiel, 21982 (Israel)
- Department of Materials Science and Engineering, Technion - IIT, Haifa, 32000 (Israel)
Highlights: • Aluminum hydroxide nanoparticles were synthesized by wet oxidation methods. • The oxidation conditions of AlN/Al affect the morphologies of the reaction products. • No changes in the synthesized materials morphology occurred up to 1000 °C. • The maxima specific surface areas for the nanostructures were achieved at 500 °C. - Abstract: A simple and environmentally friendly method to prepare aluminum oxyhydroxide and trihydroxide nanostructures by wet oxidation of AlN/Al composite nanoparticles was developed. The AlN/Al nanoparticles used were produced by electrical explosion of an aluminum wire in nitrogen atmosphere. The obtained nanostructures were characterized employing X-ray diffraction (XRD), transmission and high-resolution scanning electron microscopy (TEM and HRSEM), thermogravimetric analysis (TGA) and N{sub 2} adsorption-desorption technique (BET). By changing the wet oxidation conditions, aluminum hydroxides with different phase composition, morphology and texture characteristics were synthesized. After calcination at different temperatures, a range of transition and stable alumina nanostructures were obtained that preserved the morphology of the aluminum hydroxide precursors - agglomerated nanosheets, nanoplates or hexagonal nanorods, up to 1000 °C. Optimal process parameters for maximum surface area development for all the precursor materials have been established.
- OSTI ID:
- 22804090
- Journal Information:
- Materials Research Bulletin, Vol. 104; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ADSORPTION
ALUMINIUM HYDROXIDES
ALUMINIUM NITRIDES
ALUMINIUM OXIDES
CONTROLLED ATMOSPHERES
DESORPTION
MORPHOLOGY
NANOPARTICLES
NANOSTRUCTURES
NITROGEN
OXIDATION
SCANNING ELECTRON MICROSCOPY
SPECIFIC SURFACE AREA
THERMAL GRAVIMETRIC ANALYSIS
TRANSMISSION ELECTRON MICROSCOPY
WIRES
X-RAY DIFFRACTION