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Issue 19, 2017
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In situ SERS study of surface plasmon resonance enhanced photocatalytic reactions using bifunctional Au@CdS core–shell nanocomposites

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Abstract

Surface plasmon resonance (SPR) has been utilized in many fields, such as surface-enhanced Raman spectroscopy (SERS) and solar energy conversion. Here we developed an Au@CdS core–shell nanostructure, a bifunctional nanoparticle, used as an efficient catalyst for SPR enhanced photocatalytic degradation, and as a substrate for in situ SERS detection of methylene blue (MB) and p-nitrophenol (pNTP). With integration of an Au nanoparticle into a CdS shell, the degradation process was significantly accelerated under 500 nm long-pass (λ > 500 nm) visible light irradiation, which was caused by the injection of hot electrons. Moreover, a highly uniform, monolayer film of Au@CdS nanoparticles (NPs) has been prepared and used as both a SERS substrate and catalyst. The decomposition of MB molecules and nitrogen coupling reaction of pNTP were observed during the 638 nm laser illumination. We demonstrate that a plasmonic core-semiconductor shell nanocomposite can be a promising material for photocatalysis and in situ SERS study.

Graphical abstract: In situ SERS study of surface plasmon resonance enhanced photocatalytic reactions using bifunctional Au@CdS core–shell nanocomposites

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Publication details

The article was received on 26 Jan 2017, accepted on 13 Apr 2017 and first published on 13 Apr 2017


Article type: Communication
DOI: 10.1039/C7NR00655A
Citation: Nanoscale, 2017,9, 6254-6258
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    In situ SERS study of surface plasmon resonance enhanced photocatalytic reactions using bifunctional Au@CdS core–shell nanocomposites

    J. Yang, J. Xu, H. Ren, L. Sun, Q. Xu, H. Zhang, J. Li and Z. Tian, Nanoscale, 2017, 9, 6254
    DOI: 10.1039/C7NR00655A

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