Lanthanum and nitrogen co-doped SrTiO3 powders as visible light sensitive photocatalyst

Jinshu Wang, Shu Yin, Masakazu Komatsu, Tsugio Sato

Research output: Contribution to journalArticlepeer-review

116 Citations (Scopus)

Abstract

Lanthanum and nitrogen co-doped SrTiO3 was prepared by a mechanochemical reaction method using SrTiO3, urea and La2O3 as the raw materials. Nitrogen-doped SrTiO3 could be prepared by heating the mixture of SrTiO3 and La2O3 under flowing NH3 gas at 600 °C. The sample prepared with 0.2 mol% La2O3, 22 mol% urea and 77.8 mol% SrTiO3 which has nearly the same nitrogen and lanthanum doping atomic fractions could be obtained by a mechanochemical method and exhibited high photocatalytic activities. Under the irradiation of light with wavelengths larger than 400 and 290 nm, the photocatalytic activity of nitrogen and lanthanum co-doped SrTiO3 was 2.6 and two times greater than that of pure SrTiO3. A new absorption edge, which was formed in the visible light region and higher visible light absorption after co-doping were the reason for the high visible light photocatalytic activity of this substance.

Original languageEnglish
Pages (from-to)3207-3212
Number of pages6
JournalJournal of the European Ceramic Society
Volume25
Issue number13
DOIs
Publication statusPublished - 2005 Aug 1

Keywords

  • Doping
  • Functional applications
  • Milling
  • Optical properties
  • Photocatalysis
  • SrTiO
  • Titanates

ASJC Scopus subject areas

  • Ceramics and Composites

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