Rapid self-heating synthesis of Fe-based nanomaterial catalyst for advanced oxidation

Fengbo Yu, Chao Jia, Xuan Wu, Liming Sun, Zhijian Shi, Tao Teng, Litao Lin, Zhelin He, Jie Gao, Shicheng Zhang, Liang Wang, Shaobin Wang () and Xiangdong Zhu ()
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Fengbo Yu: Fudan University
Chao Jia: Fudan University
Xuan Wu: Fudan University
Liming Sun: Fudan University
Zhijian Shi: Fudan University
Tao Teng: Fudan University
Litao Lin: Fudan University
Zhelin He: Fudan University
Jie Gao: Fudan University
Shicheng Zhang: Fudan University
Liang Wang: Jiangsu University of Science and Technology
Shaobin Wang: The University of Adelaide
Xiangdong Zhu: Fudan University

Nature Communications, 2023, vol. 14, issue 1, 1-10

Abstract: Abstract Iron-based catalysts are promising candidates for advanced oxidation process-based wastewater remediation. However, the preparation of these materials often involves complex and energy intensive syntheses. Further, due to the inherent limitations of the preparation conditions, it is challenging to realise the full potential of the catalyst. Herein, we develop an iron-based nanomaterial catalyst via soft carbon assisted flash joule heating (FJH). FJH involves rapid temperature increase, electric shock, and cooling, the process simultaneously transforms a low-grade iron mineral (FeS) and soft carbon into an electron rich nano Fe0/FeS heterostructure embedded in thin-bedded graphene. The process is energy efficient and consumes 34 times less energy than conventional pyrolysis. Density functional theory calculations indicate that the electron delocalization of the FJH-derived heterostructure improves its binding ability with peroxydisulfate via bidentate binuclear model, thereby enhancing ·OH yield for organics mineralization. The Fe-based nanomaterial catalyst exhibits strong catalytic performance over a wide pH range. Similar catalysts can be prepared using other commonly available iron precursors. Finally, we also present a strategy for continuous and automated production of the iron-based nanomaterial catalysts.

Date: 2023
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Citations: View citations in EconPapers (5)

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DOI: 10.1038/s41467-023-40691-2

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