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Dispersion of nanosized noble metals in TiO2 matrix and their photoelectrode properties

  • Journal of the Korean Crystal Growth and Crystal Technology
  • Abbr : J. Korean Cryst. Growth Cryst. Technol.
  • 2009, 19(5), pp.251-255
  • Publisher : The Korea Association Of Crystal Growth, Inc.
  • Research Area : Engineering > Materials Science and Engineering

Jong-Won Yoon 1

1단국대학교

Accredited

ABSTRACT

Nanocomposites based on coupling TiO2 matrix with nanosized noble metals (Pt,Au) particles exhibited promising photoelectrode properties. The M/TiO2 (M = Pt,Au) nanocomposite thin films were deposited on quartz and ITO glass substrates using a co-sputtering method. TiO2 in rutile form is the dominant crystalline phase for as-deposited nanocomposite films. Along with heat treatment up to 600℃, XRD peaks of the rutile phase as well as those of noble metal increased in intensity and decreased in width, indicating the growth of crystallites. The anodic photocurrents of M/TiO2 (M = Au,Pt) thin films were observed not only in the UV range but also in the visible light range. The photocurrent of the nanocomposite films extended to the visible light region by dispersion of nano-sized noble metal in the TiO2 matrix.

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