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Evaluation of Ciprofloxacin Destruction between Ordered Mesoporous and Bulk NiMn2O4/CF Cathode: Efficient Mineralization in a Heterogeneous Electro-Fenton-like Process

Abstract

Electro-Fenton-like process was extensively applied to eliminate the ciprofloxacin antibiotics pollution in water system. Here, we developed the ordered meso-NiMn2O4 nanoparticles as the efficient electro-Fenton-like catalyst to modify CF cathode for the degradation and mineralization of ciprofloxacin. It was found that the CF cathode modified by meso-NiMn2O4 catalyst could improve the generation of H2O2, which demonstrated the excellent catalytic property and electrochemical performance. Significantly, the mesoporous architecture of this Fenton-like catalyst provided more activated sites and interconnected channels which could accelerate the electron transfer and facilitate the generation of activated radicals (•OH and •O2−). It was worth mentioning that the bifunctional meso-NiMn2O4 catalyst could provide two redox couples (Mn4+/Mn3+ and Ni3+/Ni2+) to enhance the electro-Fenton-like reaction for increasing the generation rate of active radicals.The degradation efficiency of CIP finally reached to 100% within 1.5 h by using the meso-NiMn2O4 catalyst, which was better than that of other as-prepared Fenton-like catalysts such as bulk-NiMn2O4, meso-MnO2 and meso-NiO. Simultaneously, TOC removal of CIP for meso-NiMn2O4 catalyst was twice than that of bulk-NiMn2O4 catalyst. Finally, a possible heterogeneous electro-Fenton-like reaction mechanism for the efficient destruction of CIP was proposed by using the ordered meso-NiMn2O4 catalyst.

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Publication details

The article was received on 13 Nov 2018, accepted on 08 Jan 2019 and first published on 09 Jan 2019


Article type: Paper
DOI: 10.1039/C8EN01279B
Citation: Environ. Sci.: Nano, 2019, Accepted Manuscript
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    Evaluation of Ciprofloxacin Destruction between Ordered Mesoporous and Bulk NiMn2O4/CF Cathode: Efficient Mineralization in a Heterogeneous Electro-Fenton-like Process

    Y. Sun, Y. Li, X. Mi, . S. Zhan and W. Hu, Environ. Sci.: Nano, 2019, Accepted Manuscript , DOI: 10.1039/C8EN01279B

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