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Solid State Sciences

Year: 2009  |  Volume: 11  |  Issue: 1  |  Page No.: 182 - 188

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

Jinshu Wang, Hui Li, Hongli Li, Shu Yin and Tsugio Sato

Abstract

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 (λ > 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.

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