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Controlled Growth of Cu2–xS Sheet-like Nanoshells and Cu2–xS–CdS p-n Junctions on Au Nanorods with Coupled Plasmon Resonances and Enhanced Photocatalytic Activities

Abstract

In this study, we propose an approach to grow Cu2–xS sheet-like nanoshells on Au nanorods with the aid of Ag2S auxiliary templates. Ag2S semi-shells are first grown on the side-surface of Au nanorods, then Cu2–xS sheet-like nanoshells are selectively grown on the opposite side, which is beneficial to improve the controllability of the growth sites of Cu2–xS sheet-like nanoshells. The Cu2–xS–CdS p-n junctions grown on Au nanorods are produced by replacing Ag+ with Cd2+ on the basis of the as-prepared Au/(Cu2–xS–Ag2S), so Au/(Cu2–xS–CdS) heterorods with non-central symmetric shells of Cu2–xS–CdS p-n junctions are formed. By carefully adjusting the effective thickness of the Cu2–xS–CdS junctions, the optimized photocatalytic activity of Au/(Cu2–xS–CdS) heterorods is obtained and it is about 1.62 and 1.22 times that of Au/Cu2–xS and Au/CdS. The improved photocatalytic performance of Au/(Cu2–xS–CdS) heterorods are attributed to the effective charge carriers at the interfaces of CdS–Au, Cu2–xS–Au and Cu2–xS–CdS p-n junction. Our findings provide a strategy for the optimal design of plasmon-exciton heterostructures with improved photocatalytic activity.

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Supplementary files

Article information


Submitted
26 Nov 2019
Accepted
14 Jan 2020
First published
15 Jan 2020

J. Mater. Chem. C, 2020, Accepted Manuscript
Article type
Paper

Controlled Growth of Cu2–xS Sheet-like Nanoshells and Cu2–xS–CdS p-n Junctions on Au Nanorods with Coupled Plasmon Resonances and Enhanced Photocatalytic Activities

W. Wang, S. Ma, K. Chen, P. Wang, Q. Liu, L. Zhou and Q. Wang, J. Mater. Chem. C, 2020, Accepted Manuscript , DOI: 10.1039/C9TC06472A

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