期刊
ACS APPLIED MATERIALS & INTERFACES
卷 12, 期 36, 页码 40328-40338出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.0c11360
关键词
photocatalysis; hollow structure; tandem heterojunctions; surface plasmon resonance; photothermal effect
资金
- National Natural Science Foundation of China
- Natural Science Foundation of Heilongjiang Province
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 Cu2-xS/CdS/Bi2S3 p-n-p type tandem heterojunctions constructed via the continuous growth deposition method on the surface of hollow octahedral Cu2-xS 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 Cu2-xS could also aid in photocatalytic H-2 evolution performance and photocatalytic degradation efficiency. Under vis-NIR light irradiation, the optimized Cu2-xS/CdS/Bi2S3 photocatalyst displays a notable H-2 production rate of 8012 mu mol h(-1) g(-1), 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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