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Carbon supported “core-shell structure” of Fe nanoparticles for enhanced Fenton reaction activity and magnetic separation

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Abstract

Effectively facilitating Fe3+/Fe2+ cycles and expanding its operating pH range are keys to optimizing the traditional Fenton reaction. In this exploration, we used chitosan and ferrous sulfate as precursors to prepare a multicomponent magnetic Fe/C Fenton-like catalyst, which exhibited extraordinary catalytic properties and excellent stability performance in a pH range of 4~8. Besides, it could be easily separated from the solution by a magnet. The characterization showed that the supported Fe species include troilite-2H (FeS), lepidocrocite (FeOOH), and pyrrhotite-6T (Fe1 − xS) with a unique “core-shell structure.” The presence of reductive iron sulfide core in the system can accelerate the reduction of Fe(III). Meanwhile, the graphite-like structure formed after calcination can adsorb and enrich priority pollutants near the active site through π–π coupling and strengthen electron transfer, which endows its high catalytic performance and enables it invulnerable to dissolved organic compounds.

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All data included in this study are available upon request by contact with the corresponding author.

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Acknowledgements

The authors would like to express their sincere gratitude to the anonymous reviewers for their valuable comments. The authors thank Shiyanjia Lab (www.shiyanjia.com) for their participation in the characterization of catalysts. We also thank the staff at beamline BL08U at the Shanghai Synchrotron Radiation Facility (SSRF) for providing the beam time and data analysis.

Funding

The authors gratefully acknowledge the financial support from the National Natural Science Foundation of China (No. 52000155), the Zhejiang Provincial Natural Science Foundation of China (No. LQ20E080002), the Public Benefits Projects of Ningbo (No. 202002N3055), and the Major Technological Innovation Projects of Ningbo National High-tech Zone (New Material Technology City, No. 20201CX050018).

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All authors contributed to the study. The conception and design were supported by Jianqing Ma, Jiahao Zhu, and Liang Liu. Material preparation, data collection, and analysis were performed by Jiahao Zhu and Shali Zhang. The first draft of the manuscript was written by Jiahao Zhu. All authors commented on previous versions of the manuscript. Funding acquisition was supported by Jianqing Ma and Liaoyuan Zhao. Supervision and project administration were performed by Huixia Jin and Kefeng Zhang. All authors read and approved the final manuscript.

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Correspondence to Jianqing Ma.

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Zhu, J., Ma, J., Liu, L. et al. Carbon supported “core-shell structure” of Fe nanoparticles for enhanced Fenton reaction activity and magnetic separation. Environ Sci Pollut Res 30, 7207–7217 (2023). https://doi.org/10.1007/s11356-022-22754-x

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  • DOI: https://doi.org/10.1007/s11356-022-22754-x

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