Journal of the Korean institute of surface engineering (한국표면공학회지)

The Korean Institute of Surface Engineering (한국표면공학회)
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Photocurrent Characteristics of Plasma Sprayed TiO2 Composite Coatings according to Additive Transition Metal

전이금속을 첨가한 플라즈마 TiO2 복합 용사피막의 광전류 특성

  • Ko, Byung-Chun (School of Materials Science and Metallurgical Engineering, Kyungpook National University) ;
  • Ko, Young-Bong (Korea Testing & Research Institute) ;
  • Park, Kyeung-Chaea (School of Materials Science and Metallurgical Engineering, Kyungpook National University)
  • 고병천 (경북대학교 금속신소재공학과) ;
  • 고영봉 (한국화학융합시험연구원) ;
  • 박경채 (경북대학교 금속신소재공학과)
  • Received : 2011.06.15
  • Accepted : 2011.06.29
  • Published : 2011.06.30
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Abstract

In this study, the photocurrent characteristics of plasma sprayed $TiO_2$ coatings have been investigated according to additive transition metal (Fe, Mn, Nb powder) and heat treatment conditions. The plasma sprayed $TiO_2$ coatings by heat treatment at $400^{\circ}C$ and 90 min had the higher photocurrent at ultraviolet light, no photocurrent at visible light. The photocurrent of plasma sprayed $TiO_2$ coatings added by Fe, Mn, Nb (named by plasma sprayed $TiO_2$ composite coatings) was lower than that of plasma sprayed $TiO_2$ coatings at ultraviolet light, as was low in intensity ratio of XRD(101)/(110). and the atomic percentage of oxygen by plasma sprayed $TiO_2$ composite coatings was higher than that by plasma sprayed $TiO_2$ coatings. The photocurrent of plasma sprayed $TiO_2$ composite coatings in heat treatment at $400^{\circ}C$ and 90 min was higher than that of plasma sprayed $TiO_2$ coatings in same heat treatment conditions at ultraviolet and visible light, as was high in oxygen affinity by heat treatment.

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References

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