Facile one-pot synthesis of tungsten oxide (WO3?x) nanoparticlesusing sub and supercritical fluids

Title
Facile one-pot synthesis of tungsten oxide (WO3?x) nanoparticlesusing sub and supercritical fluids
Authors
김민수이병용함형철한종희남석우Hong-shik Lee박주훈최선신유환
Issue Date
2016-02
Publisher
The Journal of supercritical fluids
Citation
VOL 111, 8-13
Abstract
Tungsten oxide (WO3) and tungsten blue oxide (WO3−x) were synthesized using sub and supercritical water and methanol. Crystalline tungsten oxides were formed with subcritical water at 250 °C, which shows lower production temperature compared to conventional solid-state methods. Glycerol hydrothermal reduction and supercritical methanol were both found to be effective in obtaining crystalline tungsten blue oxides and this is a great advantage since hydrogen is not required in the process. The synthesized particles were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and near edge X-ray absorption fine structure (NEXAFS). NEXAFS results showed that sub and supercritical methanol was more effective in reduction of tungsten oxides compared to glycerol hydrothermal reduction.
URI
http://pubs.kist.re.kr/handle/201004/58652
ISSN
08968446
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KIST Publication > Article
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