期刊
POWDER TECHNOLOGY
卷 256, 期 -, 页码 1-4出版社
ELSEVIER
DOI: 10.1016/j.powtec.2014.01.093
关键词
Tungsten oxide; Nanopowders; Aqueous solution; Electron microscopy
资金
- Scientific and Technological Research Council of Turkey (TUBITAK)
- Royal Society
The possibility of reducing the size of bulk materials, particularly making nanoparticles with controlled size, structure and shape offers massive benefits for various applications. In this respect, we report a novel water-assisted method to produce clusters of WO2 nanopowders with very high conversion yields of 90%. The proposed process is simplistic in its nature and carried out at room temperature. Nanopowders were obtained as a result of the hydrolysis of the tungsten precursor (WCl6) in the presence of NaBH4. Particle sizes of the as-synthesised partially crystallized nanopowders show a uniform distribution around 35 nm. Fully crystallized nanopowders without any morphological alteration were successfully produced already after annealing at 500 degrees C for 2 h. The nanopowders were examined using electron microscopy, XRD and DSC. (C) 2014 Elsevier B.V. All rights reserved.
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