Synergistic effect of flower-like MnFe2O4/MoS2 on photo-Fenton oxidation remediation of tetracycline polluted water
2022
Wei, Xiaoyu | I-Huan, | Lai, Cui | Huo, Xiuqin | Ma, Dengsheng | Du, Chunyan
In this work, a flower-like MnFe₂O₄-MoS₂ (FMW) catalyst was successfully prepared as a catalyst for photo-Fenton oxidation. The flower-like structured FMW possessed large open surface area, which exposed enough active sites and can fully contact with tetracycline (TC). We studied the effect of different FMW composites, H₂O₂ concentration and light intensity on the photo-Fenton process. 1FMW (MnFe₂O₄:MoS₂ = 1:10 in mol) exhibited the best degradation effect on TC, and 1 mmol/L of H₂O₂ and 398.73 mW/cm² of light were the optimum parameters. A p-n heterojunction was formed in 1FMW, ensuring the stability of composite and the fast electron transfer. Holes, •O₂⁻ and •OH were generated in photo-Fenton process and participated in TC degradation. Notably, FMW can be recycled quickly under an external magnetic field due to its magnetic properties. Overall, FMW shows good catalytic stability and recoverability in photo-Fenton oxidation process, which has a broad application prospect.
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