Excitation Light Source Dependence of Photo-catalytic Efficiency for Benzene Removal

벤젠제거에 대한 광촉매 효율의 여기광원 의존성

  • 최용석 ((주)이츠웰 부설연구소) ;
  • 김성진 ((주)이츠웰 부설연구소) ;
  • 한영헌 ((주)이츠웰 부설연구소) ;
  • 유순재 (선문대학교 전자정보통신공학부) ;
  • 이은아 (선문대학교 화학공학과) ;
  • 김학수 (선문대학교 화학공학과) ;
  • 김송강 (중부대학교 정보통신학과)
  • Published : 2005.06.01


We have investigated the excitation-light source dependence of photo-catalytic efficiency for the benzene removal. The photo-catalytic module for the benzene removal is fabricated by a combination of GaN-based ultraviolet light-emitting diode (UV GaN-LED) and $TiO_2$ thin film coated on an aluminum plate. The benzene reduction rates of 365 nm and 375 nm modules at 60 mA junction current are approximately $8.95\;\%/Hr$ and $9.2\;\%/Hr$, respectively, which indicates that 365 nm GaN-LED is more effective than 375 nm GaN-LED. The benzene reduction efficiency is also noticeably dependent on the excitation wavelength and excitation-light power, as well as it is increased with the shorter wavelength and higher excitation power. This result exhibits that UV GaN-LED is useful to remove the volatile organic compounds (VOCs) existing in the environment.


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