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The synergic generation of CO3[rad]− and O2[rad]− radicals in a novel photocatalytic fuel cell for efficient oxidation of carbonate-containing wastewater and simultaneous electricity production
, Article Applied Catalysis B: Environmental ; Volume 277 , 2020 ; Li, J ; Xia, L ; Wang, J ; Chen, S ; Zhang, Y ; Bai, J ; Li, L ; Zhou, T ; Rahim, M ; Xu, Q ; Zhou, B ; Sharif University of Technology
Elsevier B.V
2020
Abstract
The treatment of refractory wastewater and energy utilization are challenging environmental issues. Carbonate as the most common anion abounds in the aquatic environment. Here, we proposed a novel method to degrade carbonate-containing wastewater and simultaneous electricity generation via the combined oxidation of CO3[rad]− and O2[rad]− radicals. The CO3[rad]− radical was produced by the photoelectrode of TiO2/Si photovoltaic cell with the rear Si photovoltaic cell providing external bias, and the O2[rad]− radical was produced from the generation of H2O2 on a gas diffusion electrode (GDE), and they were both further enhanced from the activation reaction of H2O2 with HCO3− electrolyte. The...