Construction and photocatalytic CO2 reduction performance of S-scheme heterojunction ZnFe2O4/WO3 catalysts
A series of ZnFe2O4/WO3 photocatalysts were constructed by loading ZnFe2O4 nanoparticles on the sur-face of WO3 nanosheets,and their performance for photocatalytic CO2 reduction was studied.Under the conditions of no cocatalysts and sacrificial agents,the prepared ZnFe2O4/WO3 composite materials can catalyze the reaction between CO2 and water vapor.After illumination for 5 h,the yields of CO2 reduction products CO and CH4 of the optimal material were 7.87 and 4.88 umol·g-1,respectively.Compared to its counterparts,the yields of CO and CH4 were improved.The increased photocatalytic activity of ZnFe2O4/WO3 is attributed to the formation of heterojunc-tions between ZnFe2O4 and WO3 as well as the S-scheme charge transfer mode of the photogenerated carriers,both of which are conducive to separation efficiency of photo-generated carriers and photocatalytic CO2 reduction activity.
CO2 reductionPhotocatalytic activityZnFe2O4/WO3heterojunctionS-scheme change transfer mode
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