Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Photocatalytic Properties of WO3 Thin Films Prepared by Electrodeposition Method

전기증착법으로 제조된 WO3 박막의 광촉매 특성

  • Kang, Kwang-Mo (School of Energy, Materials, and Chemical Engineering, Korea University of Technology and Education) ;
  • Jeong, Ji-Hye (School of Energy, Materials, and Chemical Engineering, Korea University of Technology and Education) ;
  • Lee, Ga-In (School of Energy, Materials, and Chemical Engineering, Korea University of Technology and Education) ;
  • Im, Jae-Min (School of Energy, Materials, and Chemical Engineering, Korea University of Technology and Education) ;
  • Cheon, Hyun-Jeong (School of Energy, Materials, and Chemical Engineering, Korea University of Technology and Education) ;
  • Kim, Deok-Hyeon (School of Energy, Materials, and Chemical Engineering, Korea University of Technology and Education) ;
  • Nah, Yoon-Chae (School of Energy, Materials, and Chemical Engineering, Korea University of Technology and Education)
  • 강광모 (한국기술교육대학교 에너지신소재화학공학부) ;
  • 정지혜 (한국기술교육대학교 에너지신소재화학공학부) ;
  • 이가인 (한국기술교육대학교 에너지신소재화학공학부) ;
  • 임재민 (한국기술교육대학교 에너지신소재화학공학부) ;
  • 천현정 (한국기술교육대학교 에너지신소재화학공학부) ;
  • 김덕현 (한국기술교육대학교 에너지신소재화학공학부) ;
  • 나윤채 (한국기술교육대학교 에너지신소재화학공학부)
  • Received : 2019.02.11
  • Accepted : 2019.02.18
  • Published : 2019.02.28
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Abstract

Tungsten trioxide ($WO_3$) is a promising candidate as a photocatalyst because of its outstanding electrical and optical properties. In this study, we prepare $WO_3$ thin films by electrodeposition and characterize the photocatalytic degradation of methylene blue using these films. Depending on the voltage conditions (static and pulse), compact and porous $WO_3$ films are fabricated on a transparent ITO/glass substrate. The morphology and crystal structure of electrodeposited $WO_3$ thin films are investigated by scanning electron microscopy, atomic force microscopy, and X-ray diffraction. An application of static voltage during electrodeposition yields a compact layer of $WO_3$, whereas a highly porous morphology with nanoflakes is produced by a pulse voltage process. Compared to the compact film, the porous $WO_3$ thin film shows better photocatalytic activities. Furthermore, a much higher reaction rate of degradation of methylene blue can be achieved after post-annealing of $WO_3$ thin films.

Keywords

References

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