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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20 Scopus citations

Abstract

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
JournalCatalysts
Volume11
Issue number8
DOIs
StatePublished - Aug 2021

Keywords

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

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