Preparation and properties of double Z-scheme Ag/AgCl/Bi2WO6/Bi2MoO6 composite photocatalyst
A double Z-scheme composite photocatalyst Ag/AgCl/Bi2WO6/Bi2MoO6 with visible light response was prepared by one-step hydrothermal method and in-situ coprecipitation method.The morphology,structure,composition and absorbance properties of the composite photocatalyst were characterized by scanning electron microscopy,X-ray diffraction,X-ray photoelectron spectrometer and ultraviolet-visible diffuse reflectance spectrometer.Rhodamine B(RhB)was used as a simulated pollutant to evaluate the performance of the composite photocatalyst by degrading RhB under visible light.The results showed that the double Z-scheme heterojunction constructed by AgCl,Bi2WO6 and Bi2MoO6 had high catalytic activity,and the degradation rate for RhB was as high as 97.8％within 120min.The absorption intensity of visible light of the composition photocatalyst was enhanced by the local plasma resonance effect caused by the light reduction of elemental Ag on the surface of the catalyst.In addition,a possible mechanism of RhB degradation by the double Z-scheme Ag/AgCl/Bi2 WO6/Bi2 MoO6 photocatalyst was proposed.
NETL
NSTL
万方数据
