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.
Original language | English |
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Pages (from-to) | 8-13 |
Number of pages | 6 |
Journal | Journal of Supercritical Fluids |
Volume | 111 |
DOIs | |
Publication status | Published - 2016 May 1 |
Bibliographical note
Publisher Copyright:© 2016 Elsevier B.V. All rights reserved.
Keywords
- Glycerol
- Supercritical methanol
- Supercritical water
- Tungsten blue oxide
- Tungsten oxide
ASJC Scopus subject areas
- General Chemical Engineering
- Condensed Matter Physics
- Physical and Theoretical Chemistry