Microwave-induced Catalytic Oxidation of RhB by a Nanocomposite of Fe@Fe2O3 Core-Shell Nanowires and Carbon Nanotubes

摘要

In this study,a nanocomposite catalyst was prepared by combining Fe@Fe2O3 core-shell nanowires and carbon nanotubes (CNTs) with poly(tetrafluoroethylene) suspension (Fe@Fe2O3/CNTs/PTFE).The resulting Fe@Fe2O3/CNTs/PTFE catalyst was characterized by X-ray diffraction (XRD),scanning electron microscopy (SEM),energy dispersive X-ray analysis (EDX),and Fourier transform infrared (FT-IR) analysis.The microwave-induced catalytic oxidation (MICO) of rhodamine B with the Fe@Fe2O3/CNTs/PTFE catalyst was investigated.The degradation efficiency of rhodamine B (5 mg L~(-1)) reached 100% within 6 min under microwave irradiation in the presence of the composite catalyst.Moreover,it was found that the Fe@Fe2O3/ CNTs/PTFE catalyst could be recycled without the obvious loss of catalytic ability.On the basis of characterization results,a possible mechanism of microwave-induced catalytic oxidation of RhB with the Fe@Fe2O3/CNTs/PTFE catalyst was proposed.The high catalytic activity of the Fe@Fe2O3/CNTs/PTFE catalyst and its mass production make it a promising technology for wastewater treatment.