Citation: LI Jing, WU Haibo, WANG Yu, YANG Huamei, SONG Ming, DU Xihua, ZHANG Yongcai. Preparation and Enhanced Visible-Light Photocatalytic Activity of Bismuth Tungstate/Graphitic Carbon Nitride Composite Modified by Bi₂WO₆ Quantum Dots and Nanosheets[J]. Chinese Journal of Applied Chemistry, ;2019, 36(11): 1275-1285. doi: 10.11944/j.issn.1000-0518.2019.11.190046 shu

Preparation and Enhanced Visible-Light Photocatalytic Activity of Bismuth Tungstate/Graphitic Carbon Nitride Composite Modified by Bi₂WO₆ Quantum Dots and Nanosheets

LI Jing ^a,, ,
WU Haibo ^a ,
WANG Yu ^a ,
YANG Huamei ^a ,
SONG Ming ^a ,
DU Xihua ^a ,
ZHANG Yongcai ^b,,

a.
School of Chemistry and Chemical Engineering, Xuzhou University of Technology, Xuzhou, Jiangsu 221111, China
b.
School of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China

Corresponding author: LI Jing, lijingxz111@163.com ZHANG Yongcai, zhangyc@yzu.edu.cn
Received Date: 21 February 2019
Revised Date: 15 May 2019
Accepted Date: 25 June 2019

Fund Project: the Natural Science Foundation of Jiangsu Province BK20171169Supported by the National Natural Science Foundation of China(No.21703194), the Natural Science Foundation of Jiangsu Province(No.BK20171168, No.BK20171169), the Major Program of Natural Science Foundation of the Jiangsu Higher Education Institutions of China(No.18KJA430015), and the Excellent Young Teachers of "Blue Project" in Jiangsu Province(2018)the Natural Science Foundation of Jiangsu Province BK20171168the National Natural Science Foundation of China 21703194the Major Program of Natural Science Foundation of the Jiangsu Higher Education Institutions of China 18KJA430015

Figures(9)

Bismuth tungstate/graphitic carbon nitride (Bi₂WO₆/g-C₃N₄) composite photocatalyst modified by Bi₂WO₆ quantum dots and nanosheets was prepared through ultrasonic-hydrothermal method using sodium oleate as auxiliary reagent. The compositions, structures and light absorption properties of Bi₂WO₆/g-C₃N₄ were characterized by X-ray powder diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectra (FT-IR), ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS), Brunauer-Emmett-Teller (BET) and other techniques. The mechanism of synthetic reaction was proposed. Photocatalytic reduction of aqueous rhodamine B (RhB) was employed to assess the visible light photocatalytic activity of Bi₂WO₆/g-C₃N₄. Electrochemical impedance spectroscopy (EIS) and photocurrent characteriations demonstated that Bi₂WO₆/g-C₃N₄ with the heterogeneous interface separated the photo-generated electron-hole paris effectively. Hence, a rapid RhB degradation by Bi₂WO₆/g-C₃N₄-30(the number 30 represents the mass fraction(%) of g-C₃N₄) under visible light irradiation was achieved at 95.8% in 120 min. The results confirmed that the photogenerated holes were main active specie in the photodegradation process. Moreover, the relationship of heterogenrous interface and photocatalytic performance was investigated, and involved photocatalytic mechanism was revealed.
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Preparation and Enhanced Visible-Light Photocatalytic Activity of Bismuth Tungstate/Graphitic Carbon Nitride Composite Modified by Bi2WO6 Quantum Dots and Nanosheets

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通讯作者: 陈斌, bchen63@163.com

Preparation and Enhanced Visible-Light Photocatalytic Activity of Bismuth Tungstate/Graphitic Carbon Nitride Composite Modified by Bi₂WO₆ Quantum Dots and Nanosheets