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Visible light photocatalytic reduction of water using SrSnO3 sensitized by CuFeO2

SrSnO3–δ, prepared in sealed ampoules, crystallizes in the perovskite structure. The band gap is directly allowed at 3.93 eV. The conductivity was found to change markedly and occurs by polaron hopping with activation energy of 0.22 eV. The thermal variation of the thermopower indicates an electron mobility μe 300K = 3.15∙10–6 cm2∙V–1∙s–1), thermally activated. The capacitance measurement shows a linear behavior from which a flat band potential of –0.20 VSCE and an electronic density of 5.56∙1018 cm–3 were determined. The conduction band edge (–4.32 eV/–0.42 VSCE) lies below the H2O/H2 level. Accordingly, SrSnO3–δ can be used for water photoreduction when combined with the delafossite CuFeO2 as sensitizer.

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Correspondence to M. Trari.

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Translated from Teoreticheskaya i Éksperimental’naya Khimiya, Vol. 45, No. 3, pp. 160-166, May-June, 2009.

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Bellal, B., Hadjarab, B., Bouguelia, A. et al. Visible light photocatalytic reduction of water using SrSnO3 sensitized by CuFeO2 . Theor Exp Chem 45, 172–179 (2009). https://doi.org/10.1007/s11237-009-9080-y

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Key words

  • SrSnO3–δ
  • perovskite
  • capacitance
  • delafossite CuFeO2