In situ SERS study of surface plasmon resonance enhanced photocatalytic reactions using bifunctional Au@CdS core-shell nanocomposites

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 degradati...

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Published in:Nanoscale 2017-05, Vol.9 (19), p.6254-6258
Main Authors: Yang, Jing-Liang, Xu, Juan, Ren, He, Sun, Lan, Xu, Qing-Chi, Zhang, Hua, Li, Jian-Feng, Tian, Zhong-Qun
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cited_by cdi_FETCH-LOGICAL-c324t-745f6d53aeed51db6fc9b6e2893652157f30d8c4c8ec7964cca9b31842a714433
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container_end_page 6258
container_issue 19
container_start_page 6254
container_title Nanoscale
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creator Yang, Jing-Liang
Xu, Juan
Ren, He
Sun, Lan
Xu, Qing-Chi
Zhang, Hua
Li, Jian-Feng
Tian, Zhong-Qun
description 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.
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title In situ SERS study of surface plasmon resonance enhanced photocatalytic reactions using bifunctional Au@CdS core-shell nanocomposites
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