等离子体子
材料科学
纳米晶
半导体
纳米技术
光催化
纳米结构
带隙
光电子学
纳米颗粒
可见光谱
红外线的
光学
化学
物理
催化作用
生物化学
作者
Yonghyeon Kim,Dae Han Wi,Jong Wook Hong,Sang Woo Han
出处
期刊:ACS Nano
[American Chemical Society]
日期:2023-09-13
卷期号:17 (18): 18641-18651
被引量:8
标识
DOI:10.1021/acsnano.3c08182
摘要
Plasmonic metal-semiconductor hybrid photocatalysts have received much attention because of their wide light harvesting range and efficient charge carrier generation capability originating from plasmon energy transfer. Here, we introduce a plasmonic metal-semiconductor hybrid nanostructure consisting of a Au core-satellite assembly and crystalline TiO2. The formation of Au@TiO2-Au core-satellite assemblies using TiO2 as a spacer and the subsequent growth of outer TiO2 shells on the core-satellite assemblies, followed by calcination, successfully generated Au core-satellite assembly@TiO2 nanostructures. Exquisite control over the growth of the TiO2 interlayer enabled the regulation of the gap distance between the core and satellite Au nanocrystals within the same hybrid morphology. Due to the structural controllability of the present approach, the gap-distance-dependent plasmonic and photocatalytic properties of the hybrid nanostructures could be explored. The nanostructures possessing the most closely arranged Au nanocrystals showed high photocatalytic activity under visible to near-infrared light irradiation, which can be attributed to strong plasmon coupling between the core and satellite Au nanocrystals that can expedite the formation of intense plasmon energy and its transfer to TiO2.
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