In-situ growth of MoS2@CF cocatalyst for enhanced Fenton degradation of levofloxacin and reactor study
Using one-step hydrothermal method,MoS2 was attached to carbon felt fibers in situ to prepare the MoS2@CF composite catalyst for use as a cocatalyst in the Fenton reaction.The structure,morphology,and element valence states of the composite catalyst were characterized by various methods including X-ray diffraction(XRD),scanning electron microscopy(SEM),and X-ray photoelectron spectroscopy(XPS).Taking levofloxacin(LFX)as the degradation target,the effects of factors such as pH,ferrous ion dosage,cocatalyst dosage,H2O2 concentration,and initial pollutant concentration on the degradation of LFX in the MoS2@CF/Fenton system were studied.Under the optimal conditions,the degradation rate of LFX reached 91.8%after 30 minutes of reaction.The introduction of carbon felt allows the composite catalyst to avoid loss during the practical use of traditional powder catalysts.Based on the characteristics of MoS2@CF,external circulation suspension-packing reactors was constructed.After 15 days of continuous reaction,the degradation rate of LFX(accumulated to 100 mg·L-1)in the simulated wastewater remained at 90%.
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