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Metal-semiconductor-metal ternary heteronanocrystals with multiple plasmonic effects for efficient photocatalysis

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Abstract
Regarding the design of high-performance solar energy conversion platforms, heteronanostructured photocatalysts consisting of plasmonic metals and semiconductors are of particular interest due to their capability for the conversion of solar to plasmon energy that can accelerate the formation of charge carriers. Here, we introduce ternary heteronanocrystals composed of two different plasmonic metal nanocrystals (hexoctahedral Au and spherical Ag nanocrystals) and a semiconductor (Cu2O). The site-selective overgrowth of Cu2O on the high-curvature vertices of hexoctahedral Au nanocrystals and the subsequent deposition of spherical Ag nanocrystals on the Cu2O surface could realize the formation of Au–Cu2O–Ag ternary heteronanocrystals with a precisely controlled configuration. The synthesized ternary heteronanocrystals exhibited enhanced photocatalytic H2 evolution performance over a wide range of visible-light wavelengths compared to binary and monomeric counterparts. The improved photocatalytic function of the ternary heteronanocrystals can be attributed to the combination of the two different plasmonic metal nanocrystals having distinct plasmonic properties with the semiconductor, which can enable the promotion of both plasmon-induced charge and energy transfer processes. Our study can give a design guideline for devising heteronanostructure-based solar energy conversion platforms with intended functions.
Issued Date
2023
Dae Han Wi
Hyunwoo Yang
Yonghyeon Kim
Hojin Ahn
Jong Wook Hong
Sang Woo Han
Type
Article
DOI
10.1039/D2TA07415J
URI
https://oak.ulsan.ac.kr/handle/2021.oak/17874
Publisher
JOURNAL OF MATERIALS CHEMISTRY A
Language
영어
ISSN
2050-7488
Citation Volume
11
Citation Number
3
Citation Start Page
1343
Citation End Page
1350
Appears in Collections:
Natural Science > Chemistry
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