Abstract
This research aims to investigate the simulation of a pilot-scale photocatalytic reactor based on cobalt-doped ZnO films, where the photocatalyst films were initially assessed on a lab scale for the degradation of rhodamine B (RhB) under visible light. ZnO and cobalt-doped ZnO catalyst films were firstly synthesized by means of the spray pyrolysis technique. The catalyst films were then characterized by X-ray diffraction (XRD), scanning electronic microscopy (SEM), and diffuse spectroscopy (EDS) (DRS). The lattice parameters of cobalt-doped ZnO films, as well as their bandgap values and structures, have been computed applying the density functional theory (DFT). Box-Behnken Design (BBD) was used to assess the effect of the main operating parameters (contact time, RhB concentration, and cobalt doping percentage) on the photocatalytic activity that achieved 93% using 10% of cobalt doping ZnO within 120 min. Aspen Plus was used to model and design the photocatalysis process at the pilot scale based on the lab-scale results. The findings of this study suggest that cobalt-doped ZnO films could be effectively used for the photodegradation of organic pollutants and offer potential perspectives on their large-scale application for the treatment of real liquid effluents using solar light.
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Acknowledgements
In the present work, the authors are grateful for the Innovation Center (University Sidi Mohammed Ben Abdellah of Fez, Morocco for performing the XRD analysis and for the general research services (SEM and DRS) at the CNRST (Morocco).
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Tanji, K., Zouheir, M., Hachhach, M. et al. Design and simulation of a photocatalysis reactor for rhodamine B degradation using cobalt-doped ZnO film. Reac Kinet Mech Cat 134, 1017–1038 (2021). https://doi.org/10.1007/s11144-021-02116-3
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DOI: https://doi.org/10.1007/s11144-021-02116-3