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Journal of Materials Science

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13-10-2016 | Original Paper

Synthesis of Au@CdS core–shell nanoparticles and their photocatalytic capacity researched by SERS

Authors: Liwei Wang, Ruoping Li, Junhui Liu, Junhe Han, Mingju Huang

Published in: Journal of Materials Science | Issue 4/2017

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Abstract

High-quality Au@CdS core–shell nanoparticles (CSNs) have been synthesized to improve photo-conversion efficiency in photocatalysis. They demonstrate higher photocatalytic activity in the experiment of photocatalytic degradation of rhodamine 6G (R6G) solution than that of CdS counterparts. Au@CdS CSNs can broaden the absorption range in visible region compared to CdS counterparts. The heterojunction interface between Au and CdS facilitates the separation of photo-generated electron–hole pairs, and transfers electrons from CdS region to Au core. The two advantages are crucial to improve the photocatalytic activity of Au@CdS CSNs. Charge transfer mechanism between metal and semiconductor is efficient that can be used to guide the design of photocatalysts, photovoltaics, and other optoelectronic devices to effectively utilize the solar power. In this paper, we research the photocatalytic process by surface-enhanced Raman scattering (SERS). The combination of photocatalysis and SERS not only can show the change in concentration of R6G solution, but also can provide the information of the change of R6G molecular structure in photocatalytic process.

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Title: Synthesis of Au@CdS core–shell nanoparticles and their photocatalytic capacity researched by SERS
Authors: Liwei Wang
Ruoping Li
Junhui Liu
Junhe Han
Mingju Huang
Publication date: 13-10-2016
Publisher: Springer US
Published in: Journal of Materials Science / Issue 4/2017
Print ISSN: 0022-2461
Electronic ISSN: 1573-4803
DOI: https://doi.org/10.1007/s10853-016-0474-7

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