Construction of GO/Pr/PbO ternary electrode for highly efficient degradation of organic pollutants.

Chemosphere

Henan Key Laboratory of Coal Green Conversion, International Jiont Laboratory of Coal Clean Utilization, Collaborative Innovation Center of Coal Work Safety and Clean High Efficiency Utilization, and College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, 454003, China.

Published: November 2024

A series of GO/Pr/PbO electrodes were prepared by electrodeposition method, and used for the electrocatalytic degradation of methylene blue (MB) in an electrolytic cell. The characteristic properties of the as-prepared electrodes were systematically characterized via different techniques such as XRD, SEM, and XPS. Interestingly, the ternary electrode was found to possess higher catalytic performance compared with PbO and Pr/PbO electrodes, suggested that synergistic catalytic activity existed between ternary electrode. Moreover, 94.64% of MB degradation was detected over the ternary electrode under the optimized conditions (50 mg/L, pH = 3, 180 min). Besides, when rhodamine B, methyl orange, acid red and tetracycline were respectively used as the model pollutants, with no less than 60% degradation being found. Additionally, hydroxyl radical (•OH) as reactive oxygen species was confirmed according to the free radical capture experiment, whereas, a proper degradation pathway was proposed. According to the DFT calculations, the electrons of the organic pollutants can be transferred to the anode via C-O-Pr bond and Pr-O-Pb bond between the dual interfaces.

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Source
http://dx.doi.org/10.1016/j.chemosphere.2024.143803DOI Listing

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