Citation: Zhongqi Zan, Xibao Li, Xiaoming Gao, Juntong Huang, Yidan Luo, Lu Han. 0D/2D Carbon Nitride Quantum Dots (CNQDs)/BiOBr S-Scheme Heterojunction for Robust Photocatalytic Degradation and H₂O₂ Production[J]. Acta Physico-Chimica Sinica, ;2023, 39(6): 220901. doi: 10.3866/PKU.WHXB202209016 shu

0D/2D Carbon Nitride Quantum Dots (CNQDs)/BiOBr S-Scheme Heterojunction for Robust Photocatalytic Degradation and H₂O₂ Production

Zhongqi Zan ¹ ,
Xibao Li ^1,, ,
Xiaoming Gao ² ,
Juntong Huang ^1,, ,
Yidan Luo ¹ ,
Lu Han ^3,,

1.
School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang 330063, China
2.
Department of Chemistry and Chemical Engineering, Shaanxi Key Laboratory of Chemical Reaction Engineering, Yan'an University, Yan'an 716000, Shaanxi Province, China
3.
School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, Liaoning Province, China

Corresponding author: Xibao Li, lixibao@nchu.edu.cn Juntong Huang, huangjt@nchu.edu.cn Lu Han, hanlu@ustl.edu.cn
Received Date: 12 September 2022
Revised Date: 1 November 2022
Accepted Date: 24 November 2022
Available Online: 29 November 2022
Fund Project: the National Natural Science Foundation of China 51962023the National Natural Science Foundation of China 22262024the National Natural Science Foundation of China 51862024the Natural Science Foundation of Jiangxi Province, China 20212BAB204045the Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle, China (Nanchang Hangkong University) ES202002077

The construction of heterojunctions is a method employed to inhibit the rapid recombination of photogenerated carriers. In this work, zero-dimensional (0D) g-C₃N₄ quantum dots (CNQDs) were composited with two-dimensional (2D) BiOBr for the first time using the typical hydrothermal method under the conditions of a high temperature and high pressure, and a 0D/2D CNQD/BiOBr S-scheme heterojunction with an intimate-contact interface was formed. The π-electrons in the heterocycle of the CNQDs were bound to BiOBr by interaction. The apparent reaction rate constants generated by CNQDs/BiOB-1.50% for tetracycline (TC) and ciprofloxacin (CIP) degradation and H₂O₂ production were 2.02, 2.91, and 1.54 times that of the original BiOBr, respectively. In the cycle test, CNQDs/BiOBr-1.50% displayed a relatively high photocatalytic activity and structural stability. X-ray photoelectron spectroscopy (XPS) analysis showed that the π electrons in the CNQDs interacted with BiOBr, and also confirmed the flow of photogenerated electrons in this heterojunction. This successfully constructed S-scheme exhibited extraordinary photocatalytic activity and stability. The more active species and stable catalytic activity were attributed to the distinctive transfer mechanism of the carriers. This work will provide reference for constructing 0D/2D S-scheme heterojunctions for the degradation of organic pollutants and in situ production of H₂O₂.
- Photocatalysis,
- Quantum dots,
- S-scheme,
- Catalytic activity,
- H₂O₂
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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

0D/2D Carbon Nitride Quantum Dots (CNQDs)/BiOBr S-Scheme Heterojunction for Robust Photocatalytic Degradation and H2O2 Production

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通讯作者: 陈斌, bchen63@163.com

0D/2D Carbon Nitride Quantum Dots (CNQDs)/BiOBr S-Scheme Heterojunction for Robust Photocatalytic Degradation and H₂O₂ Production