Y-mediated optimization of 3DG-PbO2 anode for electrochemical degradation of PFOS

BMC Chemistry

Research

Wenqian Li¹  Liyue Liu¹  Xuesong Zhao²  Yitong Li²  Ziqi Ning²  Weiyi Wang³  Limin Chang³  Xiaoyue Duan⁴ 

[1] College of Engineering, Jilin Normal University, Siping, Jilin, China;Key Laboratory of Environmental Materials and Pollution Control, Education Department of Jilin Province, Jilin Normal University, 136000, Siping, China;College of Engineering, Jilin Normal University, Siping, Jilin, China;Key Laboratory of Preparation and Applications of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, 130103, Changchun, China;Key Laboratory of Preparation and Applications of Environmental Friendly Materials (Jilin Normal University), Ministry of Education, 130103, Changchun, China;Key Laboratory of Environmental Materials and Pollution Control, Education Department of Jilin Province, Jilin Normal University, 136000, Siping, China;College of Engineering, Jilin Normal University, Siping, Jilin, China;

关键词: Electrochemical oxidation;    PbO anode;    3DG;    Yttrium;    PFOS;   

DOI  :  10.1186/s13065-023-01057-3

 received in 2023-07-18, accepted in 2023-10-10,  发布年份 2023

来源: Springer

【 摘 要 】

In our previous study, the three-dimensional graphene-modified PbO2 (3DG-PbO2) anode was prepared for the effective degradation of perfluorooctanesulfonat (PFOS) by the electrochemical oxidation process. However, the mineralization efficiency of PFOS at the 3DG-PbO2 anode still needs to be further improved due to the recalcitrance of PFOS. Thus, in this study, the yttrium (Y) was doped into the 3DG-PbO2 film to further improve the electrochemical activity of the PbO2 anode. To optimize the doping amount of Y, three Y and 3DG codoped PbO2 anodes were fabricated with different Y3+ concentrations of 5, 15, and 30 mM in the electroplating solution, which were named Y/3DG-PbO2-5, Y/3DG-PbO2-15 and Y/3DG-PbO2-30, respectively. The results of morphological, structural, and electrochemical characterization revealed that doping Y into the 3DG-PbO2 anode further refined the β-PbO2 crystals, increased the oxygen evolution overpotential and active sites, and reduced the electron transfer resistance, resulting in a superior electrocatalytic activity. Among all the prepared anodes, the Y/3DG-PbO2-15 anode exhibited the best activity for electrochemical oxidation of PFOS. After 120 min of electrolysis, the TOC removal efficiency was 80.89% with Y/3DG-PbO2-15 anode, greatly higher than 69.13% with 3DG-PbO2 anode. In addition, the effect of operating parameters on PFOS removal was analyzed by response surface, and the obtained optimum values of current density, initial PFOS concentration, pH, and Na2SO4 concentration were 50 mA/cm2, 12.21 mg/L, 5.39, and 0.01 M, respectively. Under the optimal conditions, the PFOS removal efficiency reached up to 97.16% after 40 min of electrolysis. The results of the present study confirmed that the Y/3DG-PbO2 was a promising anode for electrocatalytic oxidation of persistent organic pollutants.

【 授权许可】

CC BY   
© The Author(s) 2023

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