한국표면공학회지 (Journal of the Korean institute of surface engineering)

  • 제56권3호
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  • Pages.208-218
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  • 2023
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  • 1225-8024(pISSN)
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  • 2288-8403(eISSN)
한국표면공학회 (The Korean Institute of Surface Engineering)
권호 표지
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가시광선 활용을 위한 Ag 도핑 흑색 ZnO 나노 광촉매 합성

Synthesis of Ag-doped black ZnO nano-catalysts for the utilization of visible-light

  • 김의준 (한국해양대학교 해양신소재융합공학과) ;
  • 김혜민 (신슈대학 물질화학과) ;
  • 이승효 (한국해양대학교 해양신소재융합공학과)
  • Ui-Jun Kim (Division of Ocean Advanced Materials Convergence Engineering, Korea Maritime & Ocean University) ;
  • Hye-Min Kim (Department of Materials Chemistry, Shinshu University) ;
  • Seung-Hyo Lee (Division of Ocean Advanced Materials Convergence Engineering, Korea Maritime & Ocean University)
  • 투고 : 2023.06.17
  • 심사 : 2023.06.26
  • 발행 : 2023.06.30
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초록

Photocatalysts are advanced materials which accelerate the photoreaction by providing ordinary reactions with other pathways. The catalysts have various advantages, such as low-cost, low operating temperature and pressure, and long-term use. They are applied to environmental and energy field, including the air and water purification, water splitting for hydrogen production, sterilization and self-cleaning surfaces. However, commercial photocatalysts only absorb ultraviolet light between 100 and 400 nm of wavelength which comprises only 5% in sunlight due to the wide band gap. In addition, rapid recombination of electron-hole pairs reduces the photocatalytic performance. Recently, studies on blackening photocatalysts by laser, thermal, and plasma treatments have been conducted to enhance the absorption of visible light and photocatalytic activity. The disordered structures could yield mid-gap states and vacancies could cause charge carrier trapping. Herein, liquid phase plasma (LPP) is adopted to synthesize Ag-doped black ZnO for the utilization of visible-light. The physical and chemical characteristics of the synthesized photocatalysts are analyzed by SEM/EDS, XRD, XPS and the optical properties of them are investigated using UV/Vis DRS and PL analyses. Lastly, the photocatalytic activity was evaluated using methylene blue as a pollutant.

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