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Ni2+ reduction under solar irradiation over CuFe2O4/TiO2 catalysts

  • Catalysis, Reaction Engineering
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Abstract

The photo-electrochemical characterization of the hetero-system CoFe2O4/TiO2 was undertaken for the Ni2+ reduction under solar light. The spinel CoFe2O4 was prepared by nitrate route at 940 °C and the optical gap (1.66 eV) was well matched to the sun spectrum. The flat band potential (-0.21 VSCE) is more cathodic than the potential of Ni2+/Ni couple (-0.6 VSCE), thus leading to a feasible nickel photoreduction. TiO2 with a gap of 3.2 eV is used to mediate the electrons transfer. The reaction is achieved in batch configuration and is optimized with respect to Ni2+ concentration (30 ppm); a reduction percentage of 72% is obtained under sunlight, the Ni2+ reduction is strongly enhanced and follows a first order kinetic with a rate constant of 4.6×10-2 min-1 according to the Langmuir-Hinshelwood model.

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Authors and Affiliations

  1. Laboratory of Storage and Valorization Renewable Energies (USTHB), BP 32 El-Alia, 16111, Algiers, Algeria

    Maamar Fedailaine, Sabrina Berkani & Mohamed Trari

Authors
  1. Maamar Fedailaine
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  2. Sabrina Berkani
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  3. Mohamed Trari
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Correspondence to Mohamed Trari.

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Fedailaine, M., Berkani, S. & Trari, M. Ni2+ reduction under solar irradiation over CuFe2O4/TiO2 catalysts. Korean J. Chem. Eng. 33, 2027–2033 (2016). https://doi.org/10.1007/s11814-016-0054-1

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  • DOI: https://doi.org/10.1007/s11814-016-0054-1

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