Preparation of MIL-100(Fe)photo-fenton catalysts and their recyclability
In order to solve the problem of metal-organic framework MIL-100(Fe)powder which was difficult to be recycled and reused in industrial applications,this paper synthesized MIL-100(Fe)powder by a hydrothermal method.The MIL-100(Fe)@porous ceramic composites were prepared by loading the powder on alumina porous ceramic using vacuum filtration method.The structure and properties of the MIL-100(Fe)and composites were characterized by using field emission scanning electron microscope-energy spectrometer(FE-SEM-EDS),X-ray diffractometer(XRD),specific surface area analyzer(BET),and ultraviolet-visible spectrophotometer(UV-VIS).The photo-Fenton-degradation abilities in the H2O2 reaction system were investigated by simulating the dye wastewater with rhodamine B(RhB)solution.Results showed that the MIL-100(Fe)presented an octahe-dral structure with a specific surface area as high as 1 152.75 m2/g.When the reaction temperature was 60 ℃,the initial concentration of H2O2 was 0.5 g/L and the initial concentration of RhB solution was 20 mg/L,the degradation rate of RhB solution reached 99.26％.When the MIL-100(Fe)@porous ceramic composites were re-cycled for 5 times,the degradation rate of RhB solution still reached more than 98％.The composites present excellent recyclability and had promising for commercialization application.
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