Objective In the nano photocatalytic hydrogen production reaction,traditional single p-n junction catalysts are limited by the bandgap width and can only absorb photons in specific areas of the solar spectrum,resulting in low solar energy utilization efficiency.To increase the utilization efficiency of solar energy by catalysts,a high activity photocatalytic pure water catalyst was prepared.Methods Taking inspiration from multi-junction solar cells,this paper adopted a simple impregnation method to superimpose p-n junctions of semiconductor materials with different bandgap widths from low to high in order to prepare a new type of multi-junction nanophotocatalyst.The structure of the catalyst was characterized by XRD,XPS,and TEM.Results After 3 h of photolysis of pure water to hydrogen production with the multi-junction nanophotocatalyst,the hydrogen production was 15.53 μmol,which was 93 times that of the traditional single p-n junction catalyst.Conclusion The results provide a new direction and new idea for the synthesis of more stable multi-junction nanophotocatalysts to achieve efficient solar energy conversion.
photocatalystdouble p-n junctiontunneling junctionsphotolysis of pure waterhydrogen production
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