DOI QR코드

DOI QR Code

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

Abstract

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.

References

  1. 신혜수, 김윤선, 허귀석, '실내외 공기중 휘발성 유기 화학물질(VOCs)의 농도조사에 관한 연구', 한국대기보전학회지, 9권, 4호, p. 310, 1993
  2. B. Y. Lee, S. H. Park, S. C. Lee, M. S. Kang, C. H. Park, and S. J. Choung, 'Optical properties of Pt-$TiO_2$ catalyst and photocatalystic activities for benzene decomposition', Korean J. Chem. Eng., Vol. 20, No.5, p. 812, 2003
  3. T. Mukai, D. Morita, and S. Nakamura, 'High-power UV InGaN/ AIGaN double-heterostructure LEDs', J. Cryst. Growth, Vol. 189/190, p. 778, 1998
  4. K. Tadatomo, H. Okagawa, Y. Ohuchi, T. Tsunekawa, Y. Imada, M. Kato, and T. Taguchi, 'High output power InGaN ultraviolet light-emitting diodes fabricated on patterned substrates using metalorganic vapor phase epitaxy', Jpn. J. Appl, Phys., Vol. 40, No. 6B, p. L583, 2001
  5. 김창연, 김성진, 최용석, 한영헌, 유순재, 김송강, '405 nm GaN-LED의 고 휘도화에 의한 백색발광다이오드의 특성 향상', 새물리, 50권, 3호, p. 180, 2005
  6. M. Yamada, T. Mitani, Y. Narukawa, S. Shioji, I. Niki, S. Sonobe, K. Deguchi, M. Sano, and T. Mukai, 'InGaN-based near ultraviolet and blue-light-emitting diode with high external quantum efficiency using a patterned sapphire substrate', Jpn, J. Appl. Phys., Vol. 41, No. 12B, p. L1431, 2002
  7. 정재훈, 문정오, 문병기, 순세모, 정수태, '광화학 반응에 의한 $TiO_2$ 나노입자 형성 빚 광학 특성', 전기전자재료학회논문지, 16권, 2호, p. 125, 2003