Electrochemical treatment of bisphenol a facilitated by a dual-ligand copper metal-organic framework/graphene oxide hybrid catalyst

Abstract

Electrochemical degradation via metal-organic framework/graphene oxide catalyst (MOF/G) is an emerging hot topic for pollutants removing under marine wastewater conditions. In this research, dual-ligand MOF/G with Cu center (Cu-IH/G) were prepared to trigger electrocatalysis. As characterization results, and synergetic effect of dual ligand was conducive to adjusting the electronic distribution of Cu-IH/G and enhancing its electrocatalytic performance. The use of Cu-IH/GO enables the rapid removal of bisphenol A (BPA) at 100 % efficiency in less than 10 min. The dual-ligand catalyst demonstrated superior degradation rates compared to electrocatalysts utilizing a single ligand (Cu-I/G and Cu-I/G). Besides, Cu-IH/G maintained stable efficiency under various conditions of pH, temperature, current and even co-existence of complex microflora. According to radical quantitative detection and electron paramagnetic resonance (EPR), singlet oxygen, O^2-, and active chlorine as primary active substances involved in the reaction was successfully identified. Subsequently, plausible pathways for the degradation of BPA were proposed. This research developed an effective strategy for electrocatalysts design to achieve high salt-resistance and pH-resistance MOF/G materials.