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

Minsoo Kim, Byung Yong Lee, Hyung Chul Ham, Jonghee Han, SukWoo Nam, Hong Shik Lee, Joo Hoon Park, Sun Choi, Youhwan Shin

Research output: Contribution to journalArticle

10 Citations (Scopus)

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 languageEnglish
Pages (from-to)8-13
Number of pages6
JournalJournal of Supercritical Fluids
Volume111
DOIs
Publication statusPublished - 2016 May 1
Externally publishedYes

Fingerprint

tungsten oxides
Supercritical fluids
supercritical fluids
Methanol
Tungsten
methyl alcohol
X ray absorption
Nanoparticles
glycerols
Glycerol
nanoparticles
Oxides
Low temperature production
fluids
tungsten
synthesis
fine structure
Crystalline materials
x rays
oxides

Keywords

  • Glycerol
  • Supercritical methanol
  • Supercritical water
  • Tungsten blue oxide
  • Tungsten oxide

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Chemical Engineering(all)
  • Condensed Matter Physics

Cite this

Facile one-pot synthesis of tungsten oxide (WO3-x) nanoparticles using sub and supercritical fluids. / Kim, Minsoo; Lee, Byung Yong; Ham, Hyung Chul; Han, Jonghee; Nam, SukWoo; Lee, Hong Shik; Park, Joo Hoon; Choi, Sun; Shin, Youhwan.

In: Journal of Supercritical Fluids, Vol. 111, 01.05.2016, p. 8-13.

Research output: Contribution to journalArticle

Kim, Minsoo ; Lee, Byung Yong ; Ham, Hyung Chul ; Han, Jonghee ; Nam, SukWoo ; Lee, Hong Shik ; Park, Joo Hoon ; Choi, Sun ; Shin, Youhwan. / Facile one-pot synthesis of tungsten oxide (WO3-x) nanoparticles using sub and supercritical fluids. In: Journal of Supercritical Fluids. 2016 ; Vol. 111. pp. 8-13.
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AU - Han, Jonghee

AU - Nam, SukWoo

AU - Lee, Hong Shik

AU - Park, Joo Hoon

AU - Choi, Sun

AU - Shin, Youhwan

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