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Morphological guidance and proportional control of Cu.sub.2O/ZnO core/shell heterojunction with enhanced visible-light-driven photocatalytic performance
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Morphological guidance and proportional control of Cu.sub.2O/ZnO core/shell heterojunction with enhanced visible-light-driven photocatalytic performance
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Morphological guidance and proportional control of Cu.sub.2O/ZnO core/shell heterojunction with enhanced visible-light-driven photocatalytic performance
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Journal Article
Morphological guidance and proportional control of Cu.sub.2O/ZnO core/shell heterojunction with enhanced visible-light-driven photocatalytic performance
2023
Overview
As a candidate for photocatalyst, the photocatalytic performance of cuprous oxide (Cu.sub.2O) is severely restricted by its high charge carrier recombination rate, self-photocorrosion and the uncertainty of crystal plane. In order to improve the photocatalytic performance and deeply analyze the photocatalytic mechanism, the Cu.sub.2O nanocrystals with cubic, cuboctahedral and octahedral structures were combined with n-type ZnO to prepare Cu.sub.2O/ZnO heterojunction photocatalysts. The effects of crystal facet of Cu.sub.2O and Zn/Cu ratios on the photocatalytic performances of Cu.sub.2O/ZnO heterojunctions were explored into. The results show that the cuboctahedron Cu.sub.2O with 100 and 111 facets exhibits more surprising catalytic performance due to the energy-level difference between the two facets, leading to higher electron-hole pair separation efficiency when compared with the octahedral Cu.sub.2O with 111 facets and cubic Cu.sub.2O with 100 facets. In addition, optimized Cu.sub.2O/ZnO heterojunction with appropriate Zn/Cu ratio exhibits the collaborative advantages of the two materials, so the catalytic activity and stability are effectively improved.
Publisher
Springer
Subject
