Study on photoactivity of anodized $TiO_2$ photoanode used of organic electrolyte for development of photocurrent

광전류 향상을 위한 유기 전해질 활용 양극산화 된 $TiO_2$ 전극의 광활성 연구

  • 심은정 (한국에너지기술연구원) ;
  • 허아영 (연세대학교 화공생명공학과) ;
  • 박민성 (연세대학교 화공생명공학과) ;
  • 윤재경 (한국에너지기술연구원) ;
  • 주현규 (한국에너지기술연구원)
  • Published : 2009.11.25

Abstract

In this paper, $TiO_2$ nanotube is prepared and the preparation is influenced by electrochemical etching rate and chemical dissolution rate. Especially, the chemical dissolution rate is lowered as the length $TiO_2$ nanotube increases. Titanium foil were anodized at various bias or current such as 20V, 55V and 0.1A (bath temperature $25^{\circ}C$) in organic electrolytes (ethylene glycol, glycerol) and then annealed at $450^{\circ}C$ and $650^{\circ}C$ to obtain the crystallized tubular $TiO_2$ on the Ti foil. Higher efficiency (89.1%) for the Cr(VI) reduction was obtained with the prepared sample compared to that (20.9%) with the sample in 0.5% HF electrolyte earlier studied.

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