Fabrication And Performance Exploration On MB And TCH Of Plasmonic Photocatalysts Based On SnO₂ Co-decorated With Bi-SPR And RGO

As a kind of advanced oxidation processes,photocatalysis could remove pollution like dye and antibiotics efficiently,which are hardly to been degraded through traditional processes.This work,based on photocatalysis,explored the degradation of as-prepared composite photocatalysts.the plasmonic photocatalysts was constructed with the Bi metal and reduced graphene oxide?rGO?.Bi metal could enhance the utilize of visible light and rGO could improve the charge separation efficiency.The mentioned improvement resulted in the high-efficiency degradation on pollutants.In this work,SnO₂ was used as basic photocatalyst.Bi metal and rGO was loaded on the surface of SnO₂ through two-step method.The best weight content of Bi?20%?and rGO?0.15%?was determined through the comparison of degradation efficiency on methylene blue and tetracycline.The final composite photocatalysts degradation on methylene blue was 75.6%?120 minutes?and that on tetracycline was 94.1%?60minutes?.The following experiment adopted the above ratio.The phase structure and surface morphology of composite photocatalysts was detected through detection including SEM,XRD,FTIR.The effect of Bi and rGO was detected through DRS,PL,Transient photocurrent and EIS,as well as the photoelectric characteristic of photocatalysts.The comparison of data revealed the dramatic enhancement of light absorptivity between 400nm and800nm,which could be attributed to the Bi metal SPR effect.Furthermore,the bandgap was 3.5 eV as well as it was.That means that the electronic structure and redox capacity was preserved.The EIS and PL data showed that the photo-carrier separation was improved and the resistance was reduced.The efficiency of separation of charge was detected by Transient photocurrent.The maximum photocurrent of SnO₂ was nearly 0.15?A·cm^-2.That of composite photocatalysts was nearly 0.4?A·cm^-2,which was approximately 2.7 times as much as the former.Through the above experiments,it can be found that the plasmonic photocatalyst constructed by Bi metal has good photocatalytic performance.The research conclusion has certain reference value for the preparation and application of Bi metal plasmonic photocatalyst in the future.