Photocatalytic properties of amorphous n-doped tio2 photocatalyst under visible light irradiation

Kyong Hwan Chung, Byung Joo Kim, Young Kwon Park, Sang Chai Kim, Sang Chul Jung

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Amorphous TiO2 doped with N was characterized by its photocatalytic activity under visible light irradiation. The amorphous N-doped TiO2 was prepared by the sol-gel method through heat treatment at a low temperature. The photocatalyst showing activity in visible light despite heat treatment at low temperature can be applied to plastics and has excellent utility. The N-doped TiO2 appeared amorphous when heat-treated at 130 °C. It was converted into an anatase-type N-doped TiO2 when this was calcined at 500 °C. The photocatalyst showed photocatalytic activities in the photocatalytic decomposition of formaldehyde and methylene blue under visible light irradiation. The photocatalyst exhibited a higher rate of hydrogen production than that of TiO2 in photocatalytic decomposition of water under liquid-phase plasma irradiation. The bandgap of the amorphous N-doped TiO2 measured by investigation of optical properties was 2.4 eV. The lower bandgap induced the photocatalytic activities under visible light irradiation.

Original languageEnglish
Article number1010
Issue number8
StatePublished - Aug 2021


  • Amorphous TiO2
  • Hydrogen production
  • Nitrogen doping
  • Photocatalytic activity
  • Visible light


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