Tungsten Doped TiO2 with Enhanced Photocatalytic and Optoelectrical Properties via Aerosol Assisted Chemical Vapor Deposition

نویسندگان

  • Sanjayan Sathasivam
  • Davinder S. Bhachu
  • Yao Lu
  • Nicholas Chadwick
  • Shaeel A. Althabaiti
  • Abdulrahman O. Alyoubi
  • Sulaiman N. Basahel
  • Claire J. Carmalt
  • Ivan P. Parkin
چکیده

Tungsten doped titanium dioxide films with both transparent conducting oxide (TCO) and photocatalytic properties were produced via aerosol-assisted chemical vapor deposition of titanium ethoxide and dopant concentrations of tungsten ethoxide at 500 °C from a toluene solution. The films were anatase TiO2, with good n-type electrical conductivities as determined via Hall effect measurements. The film doped with 2.25 at.% W showed the lowest resistivity at 0.034 Ω.cm and respectable charge carrier mobility (14.9 cm(3)/V.s) and concentration (×10(19) cm(-3)). XPS indicated the presence of both W(6+) and W(4+) in the TiO2 matrix, with the substitutional doping of W(4+) inducing an expansion of the anatase unit cell as determined by XRD. The films also showed good photocatalytic activity under UV-light illumination, with degradation of resazurin redox dye at a higher rate than with undoped TiO2.

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عنوان ژورنال:

دوره 5  شماره 

صفحات  -

تاریخ انتشار 2015