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Issue 47, 2019
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Plasmonic nanoparticle-film-assisted photoelectrochemical catalysis across the entire visible-NIR region

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Abstract

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 (λ > 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.

Graphical abstract: Plasmonic nanoparticle-film-assisted photoelectrochemical catalysis across the entire visible-NIR region

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Publication details

The article was received on 21 Aug 2019, accepted on 04 Nov 2019 and first published on 05 Nov 2019


Article type: Paper
DOI: 10.1039/C9NR07191A
Nanoscale, 2019,11, 23058-23064

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    Plasmonic nanoparticle-film-assisted photoelectrochemical catalysis across the entire visible-NIR region

    J. Zhang, Y. Sun, R. Feng, W. Liang, Z. Liang, W. Guo, I. Abdulhalim, J. Qu, C. Qiu and L. Jiang, Nanoscale, 2019, 11, 23058
    DOI: 10.1039/C9NR07191A

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