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Published on: June 16, 2020
Carbon supported "core-shell structure" of Fe nanoparticles for enhanced Fenton reaction activity and magnetic
Jiahao Zhu1,2, Jianqing Ma3,4, Liang Liu5
1College of Civil Engineering and Architecture, Zhejiang University, Hangzhou, 310058, China.
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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