Proceedings of the Korean Powder Metallurgy Institute Conference (한국분말야금학회:학술대회논문집)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Magnetic and Photo-catalytic Properties of Nanocrystalline Fe Doped $TiO_2$ Powder Synthesized by Mechanical Alloying

  • Uhm, Y.R. (Nuclear Nano Materials Development LAB., Korea Atomic Energy Research Institute (KAERI)) ;
  • Woo, S.H. (Nuclear Nano Materials Development LAB., Korea Atomic Energy Research Institute (KAERI)) ;
  • Lee, M.K. (Nuclear Nano Materials Development LAB., Korea Atomic Energy Research Institute (KAERI)) ;
  • Rhee, C.K. (Nuclear Nano Materials Development LAB., Korea Atomic Energy Research Institute (KAERI))
  • Published : 2006.09.24
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Abstract

Fe-doped $TiO_2$ nanopowders were prepared by mechanical alloying (MA) varying Fe contents up to 8.0 wt.%. The UV-vis absorption showed that the UV absorption for the Fe-doped powder shifted to a longer wavelength (red shift). The absorption threshold depends on the concentration of nano-size Fe dopant. As the Fe concentration increased up to 4 wt.%, the UV-vis absorption and the magnetization were increased. The benefical effect of Fe doping for photocatalysis and ferromagnetism had the critical dopant concentration of 4 wt.%. Based on the UV absorption and magnetization, the dopant level is localized to the valence band of $TiO_2$.

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