Korean Journal of Materials Research (한국재료학회지)

Materials Research Society of Korea (한국재료학회)
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Effects of Surface Characteristics of TiO2 Nanotublar Composite on Photocatalytic Activity

TiO2 복합 광촉매의 표면 특성과 광촉매 효율

  • Lee, Jong-Ho (Department of Chemistry, Hanseo University) ;
  • Youn, Jeong-Il (School of Advanced Materials Science and Engineering, Sungkyunkwan University) ;
  • Kim, Young-Jig (School of Advanced Materials Science and Engineering, Sungkyunkwan University) ;
  • Oh, Han-Jun (Department of Materials Science, Hanseo University)
  • 이종호 (한서대학교 화학과) ;
  • 윤정일 (성균관대학교 신소재공학부) ;
  • 김영직 (성균관대학교 신소재공학부) ;
  • 오한준 (한서대학교 신소재공학과)
  • Received : 2014.09.03
  • Accepted : 2014.09.25
  • Published : 2014.10.27
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Abstract

To synthesize a high-performance photocatalyst, N doped $TiO_2$ nanotubes deposited with Ag nanoparticles were synthesized, and surface characteristics, electrochemical behaviors, and photocatalytic activity were investigated. The $TiO_2$ nanotubular photocatalyst was fabricated by anodization; the Ag nanoparticles on the $TiO_2$ nanotubes were synthesized by a reduction reaction in $AgNO_3$ solution under UV irradiation. The XPS results of the N doped $TiO_2$ nanotubes showed that the incorporated nitrogen ions were located in interstitial sites of the $TiO_2$ crystal structure. The N doped titania nanotubes exhibited a high dye degradation rate, which is effectively attributable to the increase of visible light absorption due to interstitial nitrogen ions in the crystalline $TiO_2$ structure. Moreover, the precipitated Ag particles on the titania nanotubes led to a decrease in the rate of electron-hole recombination; the photocurrent of this electrode was higher than that of the pure titania electrode. From electrochemical and dye degradation results, the photocurrent and photocatalytic efficiency were found to have been significantly affected by N doping and the deposition of Ag particles.

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References

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