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Peroxymonosulfate activation by magnetic CoNi-MOF catalyst for degradation of organic dye

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Abstract

In this work, Fe3O4/CoNi-MOF was synthesized by a simple solvothermal method. The catalytic performance of 0.2-Fe3O4/CoNi-MOF toward PMS activation was studied by degradation of 20 mg/L methylene blue (MB). The results indicated that 0.2-Fe3O4/CoNi-MOF had good catalytic ability, the removal rate of MB was 99.4% within 60 min with 125 mg/L PMS and 150 mg/L catalyst. Quenching experiment and electron paramagnetic resonance (EPR) analysis revealed that the singlet oxygen (1O2), superoxide radical (•O2) and sulfate radical (SO4•−) played a crucial role in the catalytic degradation process. Meantime, mechanism of PMS activation by 0.2-Fe3O4/CoNi-MOF was proposed, the electrons donated by Fe2+ can also enhance the Co–Ni cycles. In conclusion, Fe3O4/CoNi-MOF composite catalyst has the advantages of simple preparation, excellent catalytic activity and reusability, which is an effective catalyst for water pollution control.

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Jiayi Li: Experimental operation, data curation and manuscript preparation. Chumin Yan: Investigation. Dedong Sun: Supervision and writing-reviewing. Hongchao Ma: Resources. Guowen Wang: Resources. Chun Ma: Resources. Jun Hao: Resources.

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Correspondence to Dedong Sun.

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Li, J., Yan, C., Sun, D. et al. Peroxymonosulfate activation by magnetic CoNi-MOF catalyst for degradation of organic dye. Environ Sci Pollut Res 30, 70371–70385 (2023). https://doi.org/10.1007/s11356-023-27369-4

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  • DOI: https://doi.org/10.1007/s11356-023-27369-4

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