Preparation and photocatalytic activity of visible light-active sulfur and nitrogen co-doped SrTiO3

• Published in: Solid state sciences 2009, Vol.11 (1), p.182-188
• Main Authors: JINSHU WANG, HUI LI, HONGLI LI, SHU YIN, SATO, Tsugio
• Format: Article
• Language: English
• Subjects: Catalysis; Catalysts: preparations and properties; Chemistry; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; General and physical chemistry; Materials science; Materials synthesis; materials processing; Physics; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
• ISSN: 1293-2558; 1873-3085
• DOI: 10.1016/j.solidstatesciences.2008.04.010

Nitrogen and sulfur co-doped SrTiO3 was prepared by high energy grinding of the mixture of SrTiO3 and thiourea. A new band gap in visible light region (522 nm) corresponding to 2.37 eV could be formed by the co-doping. The photocatalytic activity for nitrogen monoxide oxidation of SrTiO3 in visible light region especially in the long wavelength range (lambda > 510 nm) could be improved greatly. Under the irradiation of light with wavelength larger than 510 nm, the photocatalytic activity of nitrogen and sulfur co-doped SrTiO3 was 10.9 times greater than that of pure SrTiO3. The high visible light photocatalytic activity of this substance may be due to the formation of a new band gap that enables to absorb visible light effectively.