1. School of Civil Engineering, University of South China, Hengyang 421001, China; 2. Dongguan Key Laboratory of New Pollutants, School of Ecological Environment and Architectural Engineering, Dongguan University of Technology, Dongguan 523808, China
Abstract：The Fe-Co bimetallic particle electrodes (Fe,Co/NPs@GO) were synthesized by the freezing/carbonization method. And the degradation performance of the Fe,Co/NPs@GO bimetallic three-dimensional particle electrode system for CBZ was optimized by adjusting the precursor ratio of Fe and Co. The effects of current density and PMS dosage on CBZ degradation were examined. It was found that a removal rate of 99.5% for CBZ (1mg/L) could be achieved within 30min under the conditions of 0.15g/L Fe,Co/NPs@GO (Fe:Co=1:1), 3mmol/L PMS, and a current density of 20mA/cm2. The addition of electrocatalytic conditions to the pure catalyst activation of PMS system resulted in an increase in the removal rate of CBZ by approximately 37%. Radical quenching experiments and electron paramagnetic resonance (EPR) analysis confirmed that •OH and 1O2 are the primary active species responsible for CBZ degradation, and the degradation mechanism of CBZ in the electrocatalytic coupling three-dimensional particle electrode activation of peroxymonosulfate (PMS) system was deduced. The recycling experiment of the particle electrode demonstrated that the Fe, Co/NPs@GO particle electrode possesses good catalytic stability and reusability.
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