International Journal of Optics (Jan 2010)

Visible Light Photocatalytic Properties of Ta and N Codoped SrTiO3 Nanoparticles

  • Uyi Sulaeman,
  • Shu Yin,
  • Tsugio Sato

DOI
https://doi.org/10.1155/2010/261420
Journal volume & issue
Vol. 2010

Abstract

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Ta and N co-doped SrTiO3 was synthesized by microwave-assisted solvothermal reaction using SrCl2⋅6H2O, Ti(OC3H7)4, TaCl5, and HMT (hexamethylenetetramine) in KOH and oleic acid mixed solutions. The products were characterized by XRD, TG-DTA, BET surface area measurement, TEM, EDX, DRS, PL-Spectra, and XPS. The nanoparticles of perovskite-type SrTi1-xTaxO3-yNy (x=0−0.1) were successfully synthesized. The photocatalytic activity of SrTiO3 for DeNOxability in the visible light region could be improved by the codoping of Ta5+ and N3-. The excellent visible light photocatalytic activity of this substance may be due to the generation of a new band gap by doping nitrogen that enables the absorption of visible light as well as a decrease in the incidence of the lattice defects, which acts as a recombination center of photo-induced electrons and holes by codoping with Ta5+.