BI2O3/CAFE2O4 Z-SCHEME HETEROJUNCTION MATERIAL FOR PHOTOCATALYTIC DEGRADATION OF OFLOXACIN
Z-type heterojunction Bi2O3/CaFe2O4 composite catalyst was synthesized through solvothermal method.This composite cata-lyst was extensively characterized by various methods,including structure,morphology and properties.The photocatalytic activity of Bi2O3/CaFe2O4 composite catalyst was tested with ofloxacin(OFX)as the degradation target.The results indicated that Bi2O3 is loaded on the surface of CaFe2O4 to form a Z-type heterojunction structure,which accelerates the recombination of ineffective photogenerated car-riers,promotes the separation of effective photogenerated carriers,and significantly enhances the visible light catalytic activity of the Bi2O3/CaFe2O4 composite catalyst.In comparison to pure Bi2O3 and CaFe2O4,Bi2O3/CaFe2O4 composite catalyst exhibited a better degradation effect on OFX.Notably,when the Bi2O3 load is 5%,Bi2O3/CaFe2O4 exhibited the best degradation effect on OFX,with a degradation rate of up to 18.7%.After four cycles,this rate still remained at 62.5%,indicating that its physical and chemical proper-ties are stable and can be used stably for a long time.
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