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• W4381194703 endingPage "131894" @default.
• W4381194703 startingPage "131894" @default.
• W4381194703 abstract "To degrade the antiviral and antimalarial drug chloroquine phosphate (CQP), an oxygen doping MoS2 nanoflower (O-MoS2-230) co-catalyst was prepared by a hydrothermal method to construct an O-MoS2-230 co-catalytic Fenton system (O-MoS2-230/Fenton) without pH adjustment (initial pH 5.4). Remarkable CQP degradation efficiency (99.5 %) could be achieved in 10 min under suitable conditions ([co-catalyst] = 0.2 g L–1, [Fe2+]0 = 70 μM, [H2O2]0 = 0.4 mM) with a reaction rate constant of 0.24 min–1, which was 4.8 times that of MoS2 co-catalytic Fenton system (MoS2/Fenton). Compared to MoS2/Fenton, the system had 1.5 times more Fe2+ (28.4 μM) and showed a 24.0 % increase in H2O2 activation efficiency, reaching 50.0 %. The electron paramagnetic resonance (EPR) determinations and active species trapping experimental data revealed that •OH and 1O2 were responsible for CQP degradation. The combination of experiments and density functional theory (DFT) calculation demonstrates that O doping in MoS2 modifies the surface charge distribution, leading to an increase in its conductivity, thus accelerating the Fe3+/Fe2+ cycle and promoting reactive oxygen species (ROS) generation. Furthermore, O-MoS2-230/Fenton system exhibited excellent stability. This work reveals the degradation mechanism of accelerated Fe3+/Fe2+ cycle and abundant ROS in the O-MoS2-230/Fenton system and provides a promising technology for antibiotic pollutant degradation." @default.
• W4381194703 created "2023-06-20" @default.
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• W4381194703 date "2023-09-01" @default.
• W4381194703 modified "2023-09-27" @default.
• W4381194703 title "High-efficient degradation of chloroquine phosphate by oxygen doping MoS2 co-catalytic Fenton reaction" @default.
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• W4381194703 doi "https://doi.org/10.1016/j.jhazmat.2023.131894" @default.
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