A Unique Ternary Semiconductor-(Semiconductor/Metal) Nano-Architecture for Efficient Photocatalytic Hydrogen Evolution

It has been a long‐standing demand to design hetero‐nanostructures for charge‐flow steering in semiconductor systems. Multi‐component nanocrystals exhibit multifunctional properties or synergistic performance, and are thus attractive materials for energy conversion, medical therapy, and photoelectri...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2015-09, Vol.54 (39), p.11495-11500
Main Authors: Zhuang, Tao-Tao, Liu, Yan, Sun, Meng, Jiang, Shen-Long, Zhang, Ming-Wen, Wang, Xin-Chen, Zhang, Qun, Jiang, Jun, Yu, Shu-Hong
Format: Article
Language:English
Subjects:
Cadmium sulfide
Catalysis
Charge
charge separation
chemical transformation
Design engineering
Energy conversion
hetero-nanorods
Heterojunctions
Hydrogen evolution
Medical materials
Nanocrystals
Nanoparticles
Nanorods
Nanostructure
Photocatalysis
Photoelectricity
Semiconductors
Sheaths
Steering
Synthesis (chemistry)
ternary ZnS-(CdS/metal)
Zinc sulfide
Zinc sulfides
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Summary:It has been a long‐standing demand to design hetero‐nanostructures for charge‐flow steering in semiconductor systems. Multi‐component nanocrystals exhibit multifunctional properties or synergistic performance, and are thus attractive materials for energy conversion, medical therapy, and photoelectric catalysis applications. Herein we report the design and synthesis of binary and ternary multi‐node sheath hetero‐nanorods in a sequential chemical transformation procedure. As verified by first‐principles simulations, the conversion from type‐I ZnS‐CdS heterojunction into type‐II ZnS‐(CdS/metal) ensures well‐steered collections of photo‐generated electrons at the exposed ZnS nanorod stem and metal nanoparticles while holes at the CdS node sheaths, leading to substantially improved photocatalytic hydrogen‐evolution performance. Three in one: A unique 1D ternary hetero‐nanorod (ZnS) with segmented node sheaths (CdS) decorated by metal nanoparticles (Au) is constructed by a sequential chemical‐transformation strategy. The arrangement enables steered charge flow for electron–hole separation and hence efficient photocatalysis.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.201505442