Synthesis and Properties of Two-dimensional Composite Photocatalyst
A novel two-dimensional photocatalyst BiOCl/MOF-5 was successfully synthesized via a facile ultrasonic assisted solvothermal method.The X-ray diffraction,Scanning Electron Microscope,Transmission Electron Microscope,Brunauer-Emmett-Teller,UV-Visible diffuse reflectance spectrum and photoluminescence were employed to characterize and investigate its unique structure and property.In this photocatalytic system,MOF-5 was chosen as a substrate and combined with BiOCl catalyst to achieve a fire-new two-dimensional composite.The results showed that the synthesized BiOCl/MOF-5 composite photocatalyst all present a good two-dimensional morphology,and the specific surface area(110.16 m2·g-1)is significantly higher than that of single BiOCl(3.15 m2·g-1).Comparing with the pure BiOCl,the composite photocatalyst exhibits outstanding photocatalytic activity in the degradation of organic pollutants.Due to the unique structure and characteristics of MOF-5,the problem of composite catalyst aggregation and the small specific surface area is well solved.In addition,relative large specific surface area and appropriate energy band gap are beneficial for the photocatalytic reactions by providing more active sites and efficient transport paths for reactants.The photocatalytic properties of catalysts are closely related to their specific surface area and pore volume.Hence,the photocatalytic activity is obviously improved.
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