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Received December 31, 2014
Accepted February 22, 2016
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This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits
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Ni2+ reduction under solar irradiation over CuFe2O4/TiO2 catalysts
Laboratory of Storage and Valorization Renewable Energies (USTHB), BP 32 El-Alia 16111 Algiers, Algeria
Korean Journal of Chemical Engineering, July 2016, 33(7), 2027-2033(7), 10.1007/s11814-016-0054-1
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Abstract
The photo-electrochemical characterization of the hetero-system CuFe2O4/TiO2 was undertaken for the Ni2+ reduction under solar light. The spinel CuFe2O4 was prepared by nitrate route at 940 oC 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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References
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Menne T, Sci. Total Environ., 148, 275 (1994)
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Chen SL, Wang AJ, Dai C, Benziger JB, Liu XC, Chem. Eng. J., 249, 48 (2014)
Rui ZB, Wu SR, Peng C, Ji HB, Chem. Eng. J., 243, 254 (2014)
Perraud I, Ayral RM, Cammarano C, Rouessac F, Hulea V, Ayral A, Chem. Eng. J., 241, 360 (2014)
Moezzi A, McDonagh AM, Cortie MB, Chem. Eng. J., 185, 1 (2012)
Feng J, Su L, Ma YH, Ren CL, Guo Q, Chen XG, Chem. Eng. J., 221, 16 (2013)
Tu YJ, You CF, Chang CK, Chan TS, Li SH, Chem. Eng. J., 244, 343 (2014)
Wang Z, Li Q, Wang L, Shangguan W, Appl. Clay Sci., 55, 125 (2012)
Saadi S, Bouguelia A, Trari M, Renew. Energy, 31(14), 2245 (2006)
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Cherif AY, Arous O, Amara M, Omeiri S, Kerdjoudj H, Trari M, J. Hazard. Mater., 227, 386 (2012)
