光催化
材料科学
可见光谱
表面等离子共振
纳米结构
低语长廊波浪
异质结
纳米颗粒
等离子体子
吸收(声学)
纳米技术
光电子学
共振(粒子物理)
谐振器
化学
物理
催化作用
复合材料
粒子物理学
生物化学
作者
Xin Yu,Xin Jin,Xuanyu Chen,Aizhu Wang,Jianming Zhang,Jian Zhang,Zhenhuan Zhao,Mingming Gao,Luca Razzari,Hong Liu
出处
期刊:ACS Nano
[American Chemical Society]
日期:2020-09-23
卷期号:14 (10): 13876-13885
被引量:54
标识
DOI:10.1021/acsnano.0c06278
摘要
The TiO2/Au nanostructure has been acknowledged as one of the most classic visible-light active photocatalysts due to the surface plasmon resonance (SPR) of Au nanoparticles. In many cases, the SPR effect only features weak visible light absorption in conventional TiO2/Au nanostructures. Here, we demonstrate a design of TiO2/Au/TiO2 with a combination of whispering gallery mode (WGM) resonances and SPR for efficient visible-light-driven photocatalysis. Escherichia coli (E. coli) were used as natural reactants as well as a template to construct an E. coli-like TiO2/Au/TiO2 nanostructure. Using numerical simulations, we show that the E. coli-like TiO2 capsule acts as the WGM resonator to interplay with the SPR effect of the Au NPs on TiO2 surface, which leads to a significant increase of visible light absorption and the local field enhancement at the Au–TiO2 interface. Accordingly, with the synergistic effect of WGM and SPR, the E. coli-like TiO2/Au/TiO2 nanostructure exhibits enhanced photocatalytic activity in the visible range. Our work reveals a promising bioapproach to a design highly visible light active plasmonic photocatalyst.
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