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- W4280498908 abstract "The photocatalytic Ni 2+ reduction on the hetero-junction CuFe 2 O 4 /ZnO (1/1) in both plug flow reactor (PFR) and continuous flow stirred tank reactor (CFSTR), is optimized with respect to Ni 2+ initial concentration (C o = 30 ppm), pH ~ 7 and liquid flow (100 mL min −1 ). The spinel CuFe 2 O 4 and the wurtzite ZnO were prepared by nitrate route and characterized photoelectrochemically. The photoelectrochemical characterization predicts the injection of electrons from the spinel CuFe 2 O 4 to the wurtzite ZnO which are subsequently transferred to adsorbed Ni 2+ ions. To obtain high efficiencies, the optimal operating conditions for the kinetics of the reduction of the Ni 2+ are determined and compared to the theoretical model. Under sunlight, the Ni 2+ reduction is improved up to 96% because of the additional UV photons which activate ZnO. The Ni 2+ reduction follows a pseudo-first order kinetic with a rate constant of 1.63 × 10 −2 min −1 according to Langmuir-Hinshelwood. The photoactivity is slightly lowered; under artificial illumination for an optimum concentration of 30 ppm. The comparison with the theoretical model gave a reduction of 99% for a Ni 2+ concentration of 30 ppm. • New hetero-system CuFe 2 O 4 /ZnO was used for photoreduction of Ni 2+ . • The spinel CuFe 2 O 4 and the wurtzite ZnO were prepared by nitrate route. • Under sunlight, the Ni 2+ reduction is improved up to 96%. • The Ni 2+ reduction follows a pseudo-first order kinetic." @default.
- W4280498908 created "2022-05-22" @default.
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- W4280498908 date "2022-06-01" @default.
- W4280498908 modified "2023-10-16" @default.
- W4280498908 title "Photoreduction of Ni2+ under solar and artificial reactors on the hetero-junction (CuFe2O4/ZnO): Comparison between experimental and theoretical results" @default.
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- W4280498908 doi "https://doi.org/10.1016/j.mtcomm.2022.103665" @default.
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