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  • Title: S-doped NiFe-based catalyst for fast degradation of methylene blue by heterogeneous photo-Fenton reaction.
    Author: Guo X, Meng Q, Wang D, Zha F, Tang X, Tian H.
    Journal: Environ Sci Pollut Res Int; 2021 Jul; 28(27):36112-36121. PubMed ID: 33682058.
    Abstract:
    S-doped NiFe-based particles were prepared by a solvothermal method and used to degrade methylene blue (MB) aqueous solutions with visible light in a heterogeneous Fenton reaction. The obtained solid samples were characterized by XRD, SEM, TEM, and XPS. It was found that 0.2 g L-1 NiFe2S4 can degrade 99.8% MB solution within 6 min in the presence of 5 mM H2O2 and natural pH. The recycle experiments results indicate that the NiFe2S4 catalyst possessed better stability than NiFe2O4. Furthermore, NiFe2S4 particles can be easily separated from contaminant solution by using a magnet due to their excellent ferromagnetism. COD analysis experiments indicated that the COD removal rate of NiFe2S4 is 73.1% in 30 min. A possible mechanism was proposed, and the degradation products were measured by LC-MS.
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