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• W4281264655 endingPage "113508" @default.
• W4281264655 startingPage "113508" @default.
• W4281264655 abstract "Heteroatom-doped carbon materials can effectively activate H2O2 into •OH during the metal-free electro-Fenton (EF) process. However, information on bifunctional catalysts for the simultaneous generation and activation of H2O2 is scarce. In this study, O- and F-doped porous carbon cathode materials (PPCs) were prepared by the direct carbonization of polyvinylidene fluoride (PVDF) for sulfamerazine (SMR) removal in a metal-free EF process. The porous structure and chemical composition of the PPCs were regulated by the carbonization temperature. PPC-6 (carbonized at 600 °C) exhibited optimal electrocatalytic performance in terms of electrochemical H2O2 generation and activation owing to its high specific surface area, mesoporous structure, and optimum fractions of doped O and F. Excellent performance of the 2e- oxygen reduction reaction was found with an H2O2 selectivity of 93.5% and an average electron transfer number of 2.13. An H2O2 accumulative concentration of 103.9 mg/L and an SMR removal efficiency of 90.1% were achieved during the metal-free EF process. PPC-6 was able to stably remove SMR over five consecutive cycles, retaining 92.6% of its original performance. Quantitative structure-activity relationship analysis revealed that doped oxygen functional groups contributed substantially to H2O2 generation, and semi-ionic C-F bonds with high electronegativity were the cause of the activation of H2O2 to •OH. These findings suggest that the PVDF-derived carbonaceous catalysts are feasible and desirable for metal-free EF processes." @default.
• W4281264655 created "2022-05-23" @default.
• W4281264655 creator A5064842058 @default.
• W4281264655 creator A5086200888 @default.
• W4281264655 creator A5088536607 @default.
• W4281264655 date "2022-09-01" @default.
• W4281264655 modified "2023-09-26" @default.
• W4281264655 title "O- and F-doped porous carbon bifunctional catalyst derived from polyvinylidene fluoride for sulfamerazine removal in the metal-free electro-Fenton process" @default.
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• W4281264655 doi "https://doi.org/10.1016/j.envres.2022.113508" @default.
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