Study on the Photocatalytic Efficiencies of $TiO_2$

$TiO_2$의 광촉매 효율성에 관한 연구

  • Lee, J.H. (Dept. of Chemistry, Hanseo University) ;
  • Oh, H.J. (Dept. of Materials Engineering, Hanseo University) ;
  • Jang, J.M. (School of Metallurgical and Materials Engineering, Kookmin University) ;
  • Chi, C.S. (School of Metallurgical and Materials Engineering, Kookmin University)
  • 이종호 (한서대학교 화학과) ;
  • 오한준 (한서대학교 재료공학과) ;
  • 장재명 (국민대학교 금속재료공학부) ;
  • 지충수 (국민대학교 금속재료공학부)
  • Received : 2000.10.20
  • Published : 2001.02.25

Abstract

Photocatalytic $TiO_2$ films were prepared by anodic oxidation at 180 V and their structural difference caused by oxidation conditions was studies. The microstructure of $TiO_2$ films in $H_2SO_4$ and $H_2SO_4/H_2O_2$ solution was mixed type of rutile and anatase. However, the $TiO_2$ layer formed in $H_2SO_4/H_3PO_4$ and $H_2SO_4/H_3PO_4/H_2O_2$ mixture was mostly anatase type. All $TiO_2$ films prepared by anodic oxidation exhibited photocatalytic properties. The photocatalytic degradation of aniline blue was first order reaction with similar rate constants at all oxidative conditions examined in this work.

Keywords

$TiO_2$;photocatalyst;anatase;aniline blue;order of reaction

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