Journal of Electrical Engineering and Technology

  • 제8권5호
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  • Pages.1169-1174
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  • 2013
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  • 1975-0102(pISSN)
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  • 2093-7423(eISSN)
대한전기학회 (The Korean Institute of Electrical Engineers)
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Combination of Light Emitting Diode at 375 nm and Photo-reactive TiO2 Layer Prepared by Electrostatic Spraying for Sterilization

  • Hwang, Kyu-Seog (Dept. of Biomed. Eng. & Graduate School of Mechanical Eng., Nambu Univ.) ;
  • Jeon, Young-Sun (Dept. of Biomed. Eng. & Graduate School of Mechanical Eng., Nambu Univ.) ;
  • Choi, Tae-Il (Dept. of Health Admin., Kwangju Women's Univ.) ;
  • Hwangbo, Seung (Dept. of Electronic & Photonic Eng., Honam Univ.)
  • 투고 : 2012.12.27
  • 심사 : 2013.04.10
  • 발행 : 2013.09.01
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초록

The objective of this work was to increase the efficiency of ultraviolet-light emitting diodes at 375 nm for sterilization. Since $TiO_2$ had antibacterial properties, which were attributed to the appearance of hydroxyl radicals and superoxide radical anions on the surface species under ultra violet radiation at about 387 nm, photo-reactive layers such as Ag-doped $TiO_2$ were coated on aluminum substrates by electrostatic spraying. Crystallinity and surface morphology of the coating layer were examined by X-ray diffraction ${\theta}-2{\theta}$ scan and field emission-scanning electron microscope, respectively. In an antibacterial test, we observed above 99% reduction of Escherichia coli populations on 3 or 5 mol% Ag-doped $TiO_2$ layers after irradiation for 2 hrs at 375 nm, while very low inactivation on bare aluminum substrates occurred after irradiation as the same condition.

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참고문헌

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피인용 문헌

  1. Application of ultraviolet light-emitting diodes (UV-LEDs) for water disinfection: A review vol.94, 2016, https://doi.org/10.1016/j.watres.2016.03.003