Citation: LIU Bing, GONG Huili, LIU Rui, HU Changwen. Synthesis of TiO₂ Coated Gold Nanorod with Core-Shell Structure and Its Photocatalytic Hydrogen Evolution[J]. Chinese Journal of Applied Chemistry, ;2019, 36(8): 939-948. doi: 10.11944/j.issn.1000-0518.2019.08.190004 shu

Synthesis of TiO₂ Coated Gold Nanorod with Core-Shell Structure and Its Photocatalytic Hydrogen Evolution

LIU Bing ^a,, ,
GONG Huili ^a ,
LIU Rui ^a ,
HU Changwen ^b

a.
College of Resources Environment and Tourism, Capital Normal University, Beijing 100048, China
b.
School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, China

Corresponding author: LIU Bing, liubing7100@126.com
Received Date: 7 January 2019
Revised Date: 25 February 2019
Accepted Date: 9 April 2019

Figures(13)

TiO₂ coated gold nanorods with core-shell structure(GNR@TiO₂) about 200 nm were synthesized by sol-gel process and hydrothermal method. After hydrothermal crystallization, the particle size of the material expands to 300 nm, while the morphology and the local surface plasmon resonance(LSPR) of GNR have no change. The structure and properties of the samples were characterized by X-ray diffraction(XRD), high resolution transmission electron microscope(HRTEM), X-ray photoelectron spectroscopy(XPS), ultraviolet-visible absorption spectroscopy and photocatalytic hydrogen production. The results show that the hydrogen production rate of crystallized GNR@TiO₂ is 31.0 μmol/(g·h) in the visible light range, which is much higher than that of 7.3 μmol/(g·h) before crystallization. Based on experimental result and finite difference time domain(FDTD) analysis, we proposed a photocatalytic mechanism for efficient hydrogen generation. LSPR promotes the visible light absorption. Anatase TiO₂ enhances the electric field and promotes the photogenerated electron-hole separation. The crystallized TiO₂ shell is porous and multi-mesoporous, which increases the active sites and is conducive to material transfer.
- photocatalysis,
- TiO₂,
- gold nanorods,
- visible light,
- water splitting
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Synthesis of TiO2 Coated Gold Nanorod with Core-Shell Structure and Its Photocatalytic Hydrogen Evolution

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通讯作者: 陈斌, bchen63@163.com

Synthesis of TiO₂ Coated Gold Nanorod with Core-Shell Structure and Its Photocatalytic Hydrogen Evolution