Chinese Journal of Applied Chemistry ›› 2024, Vol. 41 ›› Issue (2): 256-267.DOI: 10.19894/j.issn.1000-0518.230307

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Construction of CoFe2O4/MXene Composites and Activation of Persulfate for Degradation of Atrazine

Meng-Han CAO1, Peng XU2, Feng-Yin SHI1, Gui-E LI1, Guo-Dong ZHANG1, Qing-Zhu ZHENG1, Guang-Shan ZHANG1()   

  1. 1.College of Resources and Environment,Qingdao Agricultural University,Qingdao 266109,China
    2.School of Environment,Harbin Institute of Technology,Harbin 150090,China
  • Received:2023-10-08 Accepted:2023-12-24 Published:2024-02-01 Online:2024-03-05
  • Contact: Guang-Shan ZHANG
  • About author:gszhang@qau.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(52370174);the Natural Science Foundation of Shandong Province, China(ZR2022ME128)

Abstract:

The bimetal oxide (CoFe2O4)/MXene composite catalyst is successfully prepared by microwave-assisted hydrothermal method to support the MXene on the CoFe2O4 and used for the activation of peroxymonosulfate (PMS). The structure, morphology and elemental valence states of the composite catalyst are characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). It is found that CoFe2O4 is successfully loaded on MXene. Taking atrazine (ATZ) as the target pollutant, the effects of catalyst dosage, persulfate concentration, pH and other factors on the degradation of ATZ in the CoFe2O4/MXene activated PMS degradation system are studied. The results show that at pH=6.35, the degradation of ATZ reaches 100% within 15 min when the amount of CoFe2O4/MXene (0.1 g/L) and PMS (0.37 mmol/L) are low. The quenching experiments show that both free radical and non-free radical pathways exist in the reaction system, in which SO4?-O2?- and 1O2 play a dominant role, which together acts on the degradation process of ATZ. This study has developed novel materials with excellent catalytic properties, which can provide new ideas for the degradation of organic pollutants by activated PMS over heterogeneous CoFe2O4/MXene catalysts.

Key words: CoFe2O4/MXene, Microwave hydrothermal, Peroxymonosulfate, Atrazine, Active species

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