Preparation of size and habit-controlled nano crystallites of tungsten oxide

Yong Gyu Choi, Go Sakai, Kengo Shimanoe, Yasutake Teraoka, Norio Miura, Noboru Yamazoe

研究成果: ジャーナルへの寄稿Conference article

32 引用 (Scopus)

抄録

An aqueous sol dispersing nano crystallites of WO3·2H2O was subjected to a centrifugal treatment for 1 or 10 h, to obtain two kinds of WO3·2H2O gels with very different morphology of crystals. The WO3 thick film devices fabricated with these gels were investigated for several properties including NO2 sensing characteristics. It was found that the devices prepared under proper conditions exhibited excellent NO2 sensing properties to cover environmental standard of NO2. The sensitivity to NO2 as well as the rate of response depended markedly on calcination temperature of the devices. The morphology of WO3 crystals, i.e. lamellae or disks, was almost the same as that of WO3·2H2O gel unless calcination temperature exceeded 500 °C. Based on the surface analysis using N2 adsorption technique, the above changes were estimated to result from a change in microstructure of the WO3 crystals.

元の言語英語
ページ(範囲)486-494
ページ数9
ジャーナルSensors and Actuators, B: Chemical
93
発行部数1-3
DOI
出版物ステータス出版済み - 8 1 2003
イベントProceedings of the Ninth International Meeting on Chemical Engineering - Boston, MA, 米国
継続期間: 7 7 20037 10 2003

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tungsten oxides
habits
Crystallites
crystallites
Tungsten
Gels
gels
Calcination
roasting
preparation
Crystals
Oxides
Thick film devices
crystals
dispersing
Surface analysis
Polymethyl Methacrylate
lamella
Sols
thick films

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry
  • Electrochemistry
  • Electrical and Electronic Engineering

これを引用

Preparation of size and habit-controlled nano crystallites of tungsten oxide. / Choi, Yong Gyu; Sakai, Go; Shimanoe, Kengo; Teraoka, Yasutake; Miura, Norio; Yamazoe, Noboru.

:: Sensors and Actuators, B: Chemical, 巻 93, 番号 1-3, 01.08.2003, p. 486-494.

研究成果: ジャーナルへの寄稿Conference article

Choi, Yong Gyu ; Sakai, Go ; Shimanoe, Kengo ; Teraoka, Yasutake ; Miura, Norio ; Yamazoe, Noboru. / Preparation of size and habit-controlled nano crystallites of tungsten oxide. :: Sensors and Actuators, B: Chemical. 2003 ; 巻 93, 番号 1-3. pp. 486-494.
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