A room temperature etching route to tungsten oxide hydrate nanoplates with expanded surface area

Ah Reum Han, Seong Ju Hwang, Hyun Jung, Jin Ho Choy

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Tungsten oxide hydrate nanoplates with expanded surface area have been synthesized through the acid treatment of tungstate-aluminum keggin nanocomposite. According to powder X-ray diffraction and W LIII-edge X-ray absorption spectroscopic analyses, X-ray amorphous nanocomposite is changed into crystalline WO3·2H2O upon the acidic etching of alumina component. Nitrogen adsorption-desorption isotherm and field emission-scanning electron microscopy measurements clearly demonstrated that the surface area of the nanocomposite is increased by the selective etching of alumina component, a result of the formation of the porous stacking assembly of nanoplates. From optoelectrochemical analysis, the etched derivative is found to be applicable as an electrode material for electrochromic devices. Based on the experimental findings, we are able to conclude that the present selective etching method can provide a soft-chemical synthetic route to nanocrystalline metal oxides with expanded surface area.

Original languageEnglish
Pages (from-to)2297-2300
Number of pages4
JournalMaterials Letters
Volume62
Issue number15
DOIs
Publication statusPublished - 2008 May 31

Fingerprint

tungsten oxides
Hydrates
hydrates
Tungsten
Etching
Nanocomposites
nanocomposites
Aluminum Oxide
routes
etching
Oxides
room temperature
Alumina
aluminum oxides
Electrochromic devices
x rays
tungstates
X ray absorption
electrode materials
Aluminum

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Han, Ah Reum ; Hwang, Seong Ju ; Jung, Hyun ; Choy, Jin Ho. / A room temperature etching route to tungsten oxide hydrate nanoplates with expanded surface area. In: Materials Letters. 2008 ; Vol. 62, No. 15. pp. 2297-2300.
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A room temperature etching route to tungsten oxide hydrate nanoplates with expanded surface area. / Han, Ah Reum; Hwang, Seong Ju; Jung, Hyun; Choy, Jin Ho.

In: Materials Letters, Vol. 62, No. 15, 31.05.2008, p. 2297-2300.

Research output: Contribution to journalArticle

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T1 - A room temperature etching route to tungsten oxide hydrate nanoplates with expanded surface area

AU - Han, Ah Reum

AU - Hwang, Seong Ju

AU - Jung, Hyun

AU - Choy, Jin Ho

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Y1 - 2008/5/31

N2 - Tungsten oxide hydrate nanoplates with expanded surface area have been synthesized through the acid treatment of tungstate-aluminum keggin nanocomposite. According to powder X-ray diffraction and W LIII-edge X-ray absorption spectroscopic analyses, X-ray amorphous nanocomposite is changed into crystalline WO3·2H2O upon the acidic etching of alumina component. Nitrogen adsorption-desorption isotherm and field emission-scanning electron microscopy measurements clearly demonstrated that the surface area of the nanocomposite is increased by the selective etching of alumina component, a result of the formation of the porous stacking assembly of nanoplates. From optoelectrochemical analysis, the etched derivative is found to be applicable as an electrode material for electrochromic devices. Based on the experimental findings, we are able to conclude that the present selective etching method can provide a soft-chemical synthetic route to nanocrystalline metal oxides with expanded surface area.

AB - Tungsten oxide hydrate nanoplates with expanded surface area have been synthesized through the acid treatment of tungstate-aluminum keggin nanocomposite. According to powder X-ray diffraction and W LIII-edge X-ray absorption spectroscopic analyses, X-ray amorphous nanocomposite is changed into crystalline WO3·2H2O upon the acidic etching of alumina component. Nitrogen adsorption-desorption isotherm and field emission-scanning electron microscopy measurements clearly demonstrated that the surface area of the nanocomposite is increased by the selective etching of alumina component, a result of the formation of the porous stacking assembly of nanoplates. From optoelectrochemical analysis, the etched derivative is found to be applicable as an electrode material for electrochromic devices. Based on the experimental findings, we are able to conclude that the present selective etching method can provide a soft-chemical synthetic route to nanocrystalline metal oxides with expanded surface area.

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