Plasmon Enhanced Visible Light Photocatalytic Activity of Flower-like Au-TiO2 Core-shell Nanoparticles

Youlong Chen; Liang Ma; Xiang-Bai Chen

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Plasmon Enhanced Visible Light Photocatalytic Activity of Flower-like Au-TiO2 Core-shell Nanoparticles

Youlong Chen,Liang Ma *,Xiang-Bai Chen

Hubei Key Laboratory of Optical Information and Pattern Recognition, Wuhan Institute of Technology

*Correspondence author

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Funding: National Natural Science Foundation of China（No.11574241, 11804257）, Natural Science Foundation of Hubei Province（No.2018CFB106）, Hubei Provincial Department of Education（No.D20151506）, Scientific Research Foundation of Wuhan Institute of Technology（No.18QD24, 18QD25）

Opened online:21 September 2020

Accepted by: none

Citation: Youlong Chen,Liang Ma,Xiang-Bai Chen.Plasmon Enhanced Visible Light Photocatalytic Activity of Flower-like Au-TiO2 Core-shell Nanoparticles[OL]. [21 September 2020] http://en.paper.edu.cn/en_releasepaper/content/4752800

Flower-like Au-TiO2 core-shell nanoparticles (NPs) were synthesized by a facile and high-yield hydrothermal method in which gold NPs were used as cores and TiF4 was used as precursor. A series of characterizations were carried out to examine the morphology, crystallinity, and composition of the nanostructures. The Au-TiO2 core-shell NPs exhibit uniform flower-like morphology, porous TiO2 shells, and strong surface plasmon resonance (SPR) absorption band in the visible light region. Hence, compared with the hollow TiO2 NPs, the Au-TiO2 core-shell NPs exhibited greatly improved photocatalytic activity for the degradation of methylene blue under visible light irradiation. Such enhancement can be ascribed to the resonant energy transfer and direct electron transfer between TiO2 and Au parts in the core-shell nanostructures. We believe that such plasmonic photosensitizers based on this enhancement mechanism would offer much more flexibility for designing solar energy materials, photocatalysts and other optoelectronic devices.

Keywords:Optics; Plasmon Enhanced; Visible Light photocatalysis; TiO2

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