Reasonable design of the nanostructure of heterogeneous photocatalysts is of great significance for improving their performance and stability. We report the design and fabrication of hollow sandwich-layered octahedral CuS/CdS/BiS p-n-p type tandem heterojunctions constructed via the continuous growth deposition method on the surface of hollow octahedral CuS with well-defined structures and interfaces. The unique hollow sandwich nanostructure has a large specific surface area and abundant reaction sites and enhances the separation and transfer of photogenerated carriers. In addition, the formation of a p-n-p heterojunction coupled with the surface plasmon resonance effect of CuS could also aid in photocatalytic H evolution performance and photocatalytic degradation efficiency. Under vis-NIR light irradiation, the optimized CuS/CdS/BiS photocatalyst displays a notable H production rate of 8012 μmol h g, and 2,4-dichlorophenol is almost completely photocatalytically degraded in 150 min. This strategy and rational design offer a new path toward the design of specific nanocatalysts with enhanced activity and stability and challenging reactions.
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