PHOTOCATALYTIC SYNTHESIS AND PHOTODECOMPOSITION OF AMMONIA OVER SrTiO3 AND BaTiO3 BASED CATALYSTS

Abstract

Photocatalytic synthesis of ammonia from N2 and H2O and its photodecomposition were investigated over SrTiO3 and BaTiO3 based catalysts. It was demonstrated that the yield of NH3 formation increased markedly by the use of RuO2 and NiO doped three component catalysts and that photodecomposition of NH3 was coupled with photodecomposition of H2O.

DFT study on electronic structures and optical absorption properties of C, S cation- doped SrTiO3

“…In addition to TiO 2 , other metal oxides such as ZnO, Ta 2 O 5 , and SrTiO 3 have been reported as efficient photocatalysts [6][7][8]. Among these photocatalysts, SrTiO 3 has been used for water splitting and mineralization of organic pollutants under UV light irradiation [9][10][11]. However, their wide band gap (3.0-3.2 eV) requires UV light irradiation (λ <387 nm), that only utilizes about 3% of the solar energy available.…”

Preparation of S, C cation-codoped SrTiO3 and its photocatalytic activity under visible light

“…Metal oxide semiconductor powders that show activity under UV light irradiation have been used as photocatalysts for degradation of pollutants. Among these photocatalysts, SrTiO 3 has been used for water splitting and mineralization of organic pollutants under UV light irradiation [1][2][3].…”

“…Although SrTiO 3 , one of the most promising photocatalysts, is now used in various practical applications [1][2][3], only a small UV fraction of solar light, about 2-3%, can be utilized because of its large band gap of 3.2 eV. Therefore, the development of a SrTiO 3 photocatalyst that shows a high level of activity under visible light is needed.…”

Photocatalytic activity of Zr:SrTiO3 under UV illumination

“…4 we can see that the decolorization of methylene blue solution increased with the increase of Zr doping concentration in composite catalyst; under 8% doping density of Zr the decolorization reached the maximum while it decreased when Zr doping concentration was over 8% both under UV and visible light illumination. It is probably because a large number of free Zr 4+ ions cannot reach SrTiO 3 crystal that affects SrTiO 3 to absorb the light [11][12][13].…”