期刊
NANOSCALE
卷 11, 期 47, 页码 23058-23064出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9nr07191a
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资金
- National Key R&D Program of China (International Collaboration program) - Chinese Ministry of Science and Technology [2016YFE0129800, 2018YFE0200700, 2018YFE0200702]
- National Natural Science Foundation of China [21822202, 11704088]
- Israel Ministry of Science, Technology and Space [3-13556]
- Open Project of Jiangsu Key Laboratory for Carbon-Based Functional Materials Devices [KJS1807]
- 111 projects
- Collaborative Innovation Center of Suzhou Nano Science Technology
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
Low solar light absorption and high electron-hole pair recombination are still the main challenges for solar energy conversion. Here, we design a plasmonic nanoparticle (NP)-film with a unique structure combining the advantages of a Au NP and film, which exhibits strong broadband absorption from the visible to near-infrared (NIR) wavelength range. In addition, the high density of sub-1 nm inter-particle gaps in the Au NP-film supports electromagnetic field enhancement of several orders of magnitude that greatly promotes the generation and separation of electron-hole pairs. Accordingly, the plasmonic NP-film-assisted photocatalyst (TiO2/90Au/TiO2) leads to an 88-fold increase in the photocurrent density at 0.75 V vs. RHE in 25% methanol solution under visible-NIR light irradiation (lambda > 420 nm) compared to a TiO2 film, which is higher than those of the ever reported Au/TiO2 photocatalysts in the entire visible-NIR range. Our finding indicates a promising way to explore full solar spectrum photocatalysts, which can be easily extended to other energy conversion applications.
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