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Visible light photocatalytic reduction of water using SrSnO3 sensitized by CuFeO2

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Theoretical and Experimental Chemistry Aims and scope

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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Authors and Affiliations

  1. Laboratory of Storage and Valorization of Renewable Energies, Faculty of Chemistry, USTHB, B P 32 16111, Algiers, Algeria

    B. Bellal, A. Bouguelia & M. Trari

  2. Laboratory of Solid Solutions, Faculty of Physics, USTHB, B P 32 16111, Algiers, Algeria

    B. Hadjarab

Authors
  1. B. Bellal
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  2. B. Hadjarab
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  3. A. Bouguelia
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  4. M. Trari
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Corresponding author

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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  • DOI: https://doi.org/10.1007/s11237-009-9080-y

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