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<p>The photo-driven floating catalysis is under in-depth investigation in water purification, yet it remains a significant challenge. Herein, we designed a strategy to construct the floating photocatalysts CoFe<sub>2</sub>O<sub>4</sub>/CNPs to degrade organic pollutants, which provide many approaches for PMS activation to produce reactive oxygen species (ROSs) under dark and visible light. Experimental evidence indicated that light irradiation promoted more rapid conversion of the redox cycle of Co(III)/Co(II) and Fe(III)/Fe(II), the photo-excited electrons or light irradiation could ensure the sustainability of PMS activation. The CoFe<sub>2</sub>O<sub>4</sub>/CNPs + PMS system exhibited remarkable nitrophenol (P-Nip) degradation efficiency, and 99.99% P-Nip removal was achieved in 30&#xa0;min. Furthermore, the feasibility of its practical application was evaluated in different water environments, including tap water, river water, and reservoir water. The possible degradation pathways of P-Nip in the CoFe<sub>2</sub>O<sub>4</sub>/CNPs/PMS system were further studied by liquid chromatography-mass spectrometer analysis and theoretical calculations. The toxicity of P-Nip and its oxidation intermediates products were analyzed with toxicity estimation software tool, which revealed that P-Nip was eventually decomposed into non-toxic products. This work confirmed that the synthesized CoFe<sub>2</sub>O<sub>4</sub>/CNPs was a highly efficient PMS activator for P-Nip removal, which provided a better understanding on the fabricating of floating carbon-based catalyst as promising catalyst for P-Nip removal.</p>

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Facile fabrication of CoFe2O4/CNPs activation of peroxymonosulfate toward efficient p-nitrophenol destruction: the role of light irradiation

  • 期刊论文

  • 发表日期：

    2025年7月4日

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  • Shuang Liu,
  • Xinyue Li,
  • Chao Liu,
  • Haoran Guo,
  • Zixuan Xu,
  • Xiaoni Qi,
  • Zhenliang Li

摘要

The photo-driven floating catalysis is under in-depth investigation in water purification, yet it remains a significant challenge. Herein, we designed a strategy to construct the floating photocatalysts CoFe2O4/CNPs to degrade organic pollutants, which provide many approaches for PMS activation to produce reactive oxygen species (ROSs) under dark and visible light. Experimental evidence indicated that light irradiation promoted more rapid conversion of the redox cycle of Co(III)/Co(II) and Fe(III)/Fe(II), the photo-excited electrons or light irradiation could ensure the sustainability of PMS activation. The CoFe2O4/CNPs + PMS system exhibited remarkable nitrophenol (P-Nip) degradation efficiency, and 99.99% P-Nip removal was achieved in 30 min. Furthermore, the feasibility of its practical application was evaluated in different water environments, including tap water, river water, and reservoir water. The possible degradation pathways of P-Nip in the CoFe2O4/CNPs/PMS system were further studied by liquid chromatography-mass spectrometer analysis and theoretical calculations. The toxicity of P-Nip and its oxidation intermediates products were analyzed with toxicity estimation software tool, which revealed that P-Nip was eventually decomposed into non-toxic products. This work confirmed that the synthesized CoFe2O4/CNPs was a highly efficient PMS activator for P-Nip removal, which provided a better understanding on the fabricating of floating carbon-based catalyst as promising catalyst for P-Nip removal.