Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Visible-photoresponsive Nitrogen-Doped Mesoporous TiO2 Films for Photoelectrochemical Cells

  • Bae, Jae-Young (Department of Chemistry, Keimyung University) ;
  • Yun, Tae-Kwan (School of Display and Chemical Engineering, Yeungnam University) ;
  • Ahn, Kwang-Soon (School of Display and Chemical Engineering, Yeungnam University) ;
  • Kim, Jae-Hong (School of Display and Chemical Engineering, Yeungnam University)
  • Published : 2010.04.20
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Abstract

Nitrogen-doped $TiO_2$ ($TiO_2$:N) nano-particles with a pure anatase crystalline structure were successfully synthesized through the hydrolysis of $TiCl_4$ in an ammonia aqueous solution. The samples were characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM), $N_2$-sorption, and UV-vis diffuse reflectance spectra (UV-vis DRS) techniques. The absorption edge of nitrogen-doped $TiO_2$ shifted into the visible wavelength region. The photoelectrochemical (PEC) performances were investigated for the $TiO_2$ mesoporous electrodes doped with different nitrogen concentrations. The $TiO_2$:N electrodes exhibited much higher PEC responses compared to the pure $TiO_2$ electrode because of the significantly enhanced visible-photoresponsibility of the $TiO_2$:N electrodes.

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