0D/2D Carbon Nitride Quantum Dots (CNQDs)/BiOBr S-Scheme Heterojunction for Robust Photocatalytic Degradation and H<sub>2</sub>O<sub>2</sub> Production

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碳氮量子点(CNQDs)/BiOBr复合的S型异质结高效光催化降解和产H₂O₂

昝忠奇 ^1, ,
李喜宝 ^{1,
,} ,
高晓明 ^2, ,
黄军同 ^{1,
,} ,
罗一丹 ^1, ,
韩露 ^{3,
,}

1.
南昌航空大学材料科学与工程学院, 南昌 330063
2.
延安大学化学化工系, 陕西省化学反应工程重点实验室, 陕西延安 716000
3.
辽宁科技大学材料与冶金学院, 辽宁鞍山 114051

通讯作者: 李喜宝, lixibao@nchu.edu.cn
黄军同, huangjt@nchu.edu.cn
韩露, hanlu@ustl.edu.cn

基金项目:
国家自然科学基金 51962023

国家自然科学基金 22262024

国家自然科学基金 51862024

江西省自然科学基金 20212BAB204045

江西省持久性污染物控制与资源循环重点实验室(南昌航空大学)开放基金 ES202002077

摘要: 光生载流子的快速复合制约着BiOBr的光催化性能，通过构建界面紧密结合的异质结可以有效地解决这个问题。在本研究中，通过采用简单的高温高压水热法，首次在二维(2D)BiOBr表面上成功复合了零维(0D)的g-C₃N₄量子点(CNQDs)，并形成了具有紧密接触界面的0D/2D CNQDs/BiOBr S型异质结，主要原因是CNQDs杂环中的π电子与BiOBr产生了相互作用。CNQDs/BiOBr-1.50%复合材料在光照下降解四环素(TC)、环丙沙星(CIP)和产H₂O₂的表观反应速率常数k值分别是BiOBr的2.02、2.91和1.54倍。在循环测试中，CNQDs/BiOBr-1.50%显示出相对较高的光催化活性和结构稳定性。通过X射线光电子能谱(XPS)分析，明确CNQDs中的π电子与BiOBr具有相互作用，确认了异质结中光生电子的转移方向。CNQDs/BiOBr S型异质结的成功构建使其具有非凡的光催化稳定性和活性。更多活性物质的产生和稳定的催化活性归因于电子和空穴的独特转移机制。CNQDs/BiOBr S型异质结的特殊的电子-空穴转移机理实现了载流子在空间的有效分离和转移，且在光照条件下，催化剂上产生了更多的活性自由基，CNQDs/BiOBr复合材料的光催化活性和产H₂O₂的能力显著增强。这项工作将为构建用于降解有机污染物和原位产H₂O₂的0D/2D S型异质结提供借鉴与参考。

关键词:

English

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
Accepted Date: 24 November 2022
Revised Date: 01 November 2022
Available Online: 15 June 2023
Fund Project:

Abstract: 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.

Key words:

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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碳氮量子点(CNQDs)/BiOBr复合的S型异质结高效光催化降解和产H₂O₂

通讯作者: 李喜宝, lixibao@nchu.edu.cn
黄军同, huangjt@nchu.edu.cn
韩露, hanlu@ustl.edu.cn

English

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

Corresponding author: Xibao Li, lixibao@nchu.edu.cn Juntong Huang, huangjt@nchu.edu.cn Lu Han, hanlu@ustl.edu.cn

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

0D/2D碳氮量子点(CNQDs)/BiOBr复合的S型异质结高效光催化降解和产H2O2

通讯作者: 李喜宝, lixibao@nchu.edu.cn 黄军同, huangjt@nchu.edu.cn 韩露, hanlu@ustl.edu.cn

English

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

Corresponding author: Xibao Li, lixibao@nchu.edu.cn Juntong Huang, huangjt@nchu.edu.cn Lu Han, hanlu@ustl.edu.cn

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

0D/2D碳氮量子点(CNQDs)/BiOBr复合的S型异质结高效光催化降解和产H₂O₂

通讯作者: 李喜宝, lixibao@nchu.edu.cn
黄军同, huangjt@nchu.edu.cn
韩露, hanlu@ustl.edu.cn

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

CCS Chemistry：颜徐州、鲍哲南：你的皮肤可能是一片SPMs