Citation: Liu Yanan, Shen Zhangfeng, Song Jialing, Qi Huilan, Yin Chaochuang, Zou Xuhui, Xia Qineng, Cui Lifeng, Li Xi, Wang Yangang. Honeycomb-like g-C₃N₄/CeO_2-x nanosheets obtained via one step hydrothermal-roasting for efficient and stable Cr(Ⅵ) photo-reduction[J]. Chinese Chemical Letters, ;2020, 31(10): 2747-2751. doi: 10.1016/j.cclet.2020.06.016 shu

Honeycomb-like g-C₃N₄/CeO_2-x nanosheets obtained via one step hydrothermal-roasting for efficient and stable Cr(Ⅵ) photo-reduction

Liu Yanan ^a ,
Shen Zhangfeng ^a ,
Song Jialing ^a,b ,
Qi Huilan ^b ,
Yin Chaochuang ^b ,
Zou Xuhui ^b ,
Xia Qineng ^a ,
Cui Lifeng ^b ,
Li Xi ^a ,
Wang Yangang ^a,*,

a.
College of Biological Chemical Science and Engineering, Jiaxing University, Jiaxing 314001, China
b.
Department of Environmental Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

ygwang8136@mail.zjxu.edu.cn

Received Date: 6 April 2020
Revised Date: 15 May 2020
Accepted Date: 9 June 2020
Available Online: 17 June 2020

Figures(4)

Graphitic carbon nitride (g-C₃N₄)-based materials are regarded as one of the most potential photocatalysts for utilizing solar energy. In this work, we reported a facile one step in-situ hydrothermal-roasting method for preparing honeycomb-like g-C₃N₄/CeO₂ nanosheets with abundant oxygen vacancies (g-C₃N₄/CeO_2-x). The hydrothermal-roasting and incomplete-sealed state can (ⅰ) generate an in-situ reducing atmosphere (CO, N₂, NH₃) to tune the concentration of oxygen vacancies in CeO₂; (ⅱ) beneficial to prevent continuous growth of g-C₃N₄ and results in honeycomb-like g-C₃N₄/CeO_2-x hybrid nanosheets. What is more, the g-C₃N₄/CeO_2-x photocatalyst exhibited extended photoresponse range, increased specific surface area and obviously enhanced separation efficiency of photogenerated electron-hole pairs. As a proof-of-concept application, the optimized g-C₃N₄/CeO_2-x nanosheets could achieve 98% removal efficiency for Cr(Ⅵ) under visible light irradiation (λ ≥ 420 nm) within 2.5 h, which is significantly better than those of pure g-C₃N₄ and CeO₂. This work provides a new idea for more rationally designing and constructing g-C₃N₄-based catalysts for efficient extended photochemical application.
- One step hydrothermal-roasting method,
- g-C₃N₄/CeO_2-x,
- Oxygen vacancies,
- Cr(Ⅵ) reduction,
- Visible light photocatalysis
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Honeycomb-like g-C3N4/CeO2-x nanosheets obtained via one step hydrothermal-roasting for efficient and stable Cr(Ⅵ) photo-reduction

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通讯作者: 陈斌, bchen63@163.com

Honeycomb-like g-C₃N₄/CeO_2-x nanosheets obtained via one step hydrothermal-roasting for efficient and stable Cr(Ⅵ) photo-reduction