Journal
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
Volume 5, Issue 5, Pages 4249-4257Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acssuschemeng.7b00242
Keywords
Photoelectrochemical performance; Plasmon effect; Nanotube arrays; ZnO/CdS; Au nanoparticles
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Funding
- Natural Science Foundation of China [21576056, 21576057]
- Natural Science Foundations of Guangdong Province [2014A030313520]
- Science and Technology Research Project of Guangdong Province [2016A010103043]
- Science and Technology Research Project of Guangzhou [201607010232, 201607010198]
- Research Fund Program of Guangdong Provincial Key Laboratory of Radionuclides Pollution Control and Resources [GZDX2016K002]
- High Level University Construction Project (Regional Water Environment Safety and Water Ecological Protection)
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The design and decoration of plasmonic metal hybrid photoanodes provide an effective strategy for highly efficient photoelectrochemical (PEC) water splitting. In this work, an Au nanoparticle (NP) decorated highly ordered ZnO/CdS nanotube arrays (ZnO/CdS/Au NTAs) photoanode has been rationally designed and successfully synthesized. By virtue of the favorable band alignment and specific nanotube structure of ZnO/CdS as well as the surface plasmonic effect of Au NPs, the ZnO/CdS/Au NTAs photoanode shows significantly enhanced PEC performance as compared to the ZnO/CdS/Au and ZnO/CdS nanorod arrays (NRAs). Impressively, the optimized ZnO/CdS/Au NTAs photoanode exhibits the highest photocurrent density of 21.53 mA/cm(2) at 1.2 V vs Ag/AgCl and 3.45% photoconversion efficiency (PCE) among the parallel photoanodes under visible light illumination (lambda > 420 nm).
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