Transactions of the Korean hydrogen and new energy society (한국수소및신에너지학회논문집)

The Korean Hydrogen and New Energy Society (한국수소및신에너지학회)
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Photocatalytic Cr(VI) Reduction with a Photoanode for Hydrogen Production

수소제조용 광전극을 활용한 Cr(VI) 환원처리에 관한 연구

  • Shim, Eun-Jung (Dept. of Chemistry, Chungnam Nat'l Univ.) ;
  • Park, Youn-Bong (Dept. of Chemistry, Chungnam Nat'l Univ.) ;
  • Bae, Sang-Hyun (Dept. of Environ. Engr., Yonsei Univ.) ;
  • Yoon, Jae-Kyung (Fossil Energy & Environment Research Dept., Korea Institute of Energy Research) ;
  • Joo, Hyun-Ku (Fossil Energy & Environment Research Dept., Korea Institute of Energy Research)
  • 심은정 (충남대학교 화학과) ;
  • 박윤봉 (충남대학교 화학과) ;
  • 배상현 (연세대학교 환경공학과) ;
  • 윤재경 (한국에너지기술연구원 온실가스연구센터) ;
  • 주현규 (한국에너지기술연구원 온실가스연구센터)
  • Published : 2007.12.15
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Abstract

Titanium foil and mesh(anodized tubular $TiO_2$ electrode, ATTE) were anodized in a bath at $5^{\circ}C$ with 20V external bias applied, then annealed at different temperatures($450^{\circ}C{\sim}850^{\circ}C$) to obtain tubular $TiO_2$ on the Ti substrate. The prepared sample was used to investigate rate of hydrogen production as well as Cr(VI) reduction. The ATTEs annealed at relatively lower temperatures showed higher activity than those at relatively higher temperatures. In particular, the Cr(VI) reduction was pH-dependent. To improve photocatalytic Cr(VI) reduction with the ATTEs, two configurations, fixing foil type and rotating mesh type, were also compared. As a result, the rotating mesh type was much more effective for Cr(VI) reaction than the former due to the more efficient use of the light. In the rotating type reactor, as the rotating speed increased, the rate of the Cr(VI) reduction was getting faster.

Keywords

References

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