論文

査読有り 筆頭著者 責任著者
2017年

Effect of Oxidation Temperature on Photo-catalytic Properties of Stainless Steel Coated by Copper Oxide

ISIJ INTERNATIONAL
  • Motoaki Morita
  • ,
  • Kengo Kishihara
  • ,
  • Shinichi Motoda
  • ,
  • Norimitsu Kogaz
  • ,
  • Tadashi Shinohara

57
9
開始ページ
1609
終了ページ
1616
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.2355/isijinternational.ISIJINT-2017-087
出版者・発行元
IRON STEEL INST JAPAN KEIDANREN KAIKAN

Copper oxide (Cu-oxide) electrodes were produced by the vacuum deposition of pure copper on a stainless steel substrate, followed by oxidation in air between 150 and 550 degrees C. The potentials and durability of the Cu-oxide electrodes under xenon light irradiation were evaluated, and the effects of the microstructure on the electrode performance were discussed. The photocatalytic effect of a p-type semiconductor in a Cu-oxide electrode was confirmed for all treatment temperatures. Electrodes oxidized at 150 degrees C showed a very weak photocatalytic effect because the main phase of the thin film comprised amorphous Cu. The potentials of the electrodes oxidized at 450 and 550 degrees C shifted to more than 230 mV (SCE) after light irradiation but they immediately decreased to 100 mV (SCE) due to the self-corrosion (photo-corrosion) of CuO. The electrodes oxidized at 250 and 350 degrees C retained their photocatalytic activities at irradiation time of more than 24 h. The initial potentials of the electrodes oxidized at 250 and 350 degrees C are 100 mV (SCE) and 280 mV (SCE), respectively. The potential of the electrode oxidized at 250 degrees C increased with time because Cu2O, which was the initial main phase of the electrode, was oxidized to CuO by a surface reaction during irradiation. In the electrode oxidized at 350 degrees C, the photo-excited electrons and the photo-generated holes hardly reacted with the electrode surface by the interactions between the Cu-oxide film and the passive film of stainless steel substrate. The electrode exhibited the best performance in terms of potential and durability during the light irradiation.

リンク情報
DOI
https://doi.org/10.2355/isijinternational.ISIJINT-2017-087
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000411919100016&DestApp=WOS_CPL
共同研究・競争的資金等の研究課題
ステンレス鋼基板を用いた微生物燃料電池用光触媒電極の開発
URL
https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85029678649&origin=inward
ID情報
  • DOI : 10.2355/isijinternational.ISIJINT-2017-087
  • ISSN : 0915-1559
  • eISSN : 1347-5460
  • SCOPUS ID : 85029678649
  • Web of Science ID : WOS:000411919100016

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