High-Quantum-Yield Carbon Nitride Quantum Dots via Water Vapor Intercalation-Exfoliation for Efficient Tetracycline Hydrochloride Degradation

IF 12.1 2区 材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Small Pub Date : 2025-07-20 DOI:10.1002/smll.202505132
Wanlong Song, Niuniu Zhang, Jianing Li, Xiaojun Ma, Dongna Li, Jie Li
{"title":"High-Quantum-Yield Carbon Nitride Quantum Dots via Water Vapor Intercalation-Exfoliation for Efficient Tetracycline Hydrochloride Degradation","authors":"Wanlong Song,&nbsp;Niuniu Zhang,&nbsp;Jianing Li,&nbsp;Xiaojun Ma,&nbsp;Dongna Li,&nbsp;Jie Li","doi":"10.1002/smll.202505132","DOIUrl":null,"url":null,"abstract":"<p>Graphitic carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) has demonstrated potential applications in addressing energy shortages and preserving water ecosystem stability due to its high efficiency in degrading antibiotics. However, the mediocre catalytic performance of bulk g-C<sub>3</sub>N<sub>4</sub> is attributed to inefficient carrier transport and a high complexation rate of photogenerated electron-hole pairs. Herein, a method for fabricating carbon nitride quantum dots (CNQDs) via water vapor intercalation-exfoliation during high-temperature thermo-polymerization of g-C<sub>3</sub>N<sub>4</sub> is proposed. The resulting CNQDs exhibit a high quantum yield (49.8%), reduced bandgap, and pH-dependent properties. Structural nitrogen defects and doping of oxygen-containing functional groups contribute to improved charge-transfer efficiency and enhanced photooxidation capacity of CNQDs from water vapor intercalation-exfoliation. Remarkably, the optimal CNQDs-650 demonstrates excellent photodegradation activity of tetracycline hydrochloride (TCH), ≈2.7 times higher than that of g-C<sub>3</sub>N<sub>4</sub>. Additionally, the photo degradation pathways of TCH are proposed based on identified intermediates. This study introduces a new and efficient approach to synthesizing CNQDs with high photocatalytic performance.</p>","PeriodicalId":228,"journal":{"name":"Small","volume":"21 36","pages":""},"PeriodicalIF":12.1000,"publicationDate":"2025-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Small","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/smll.202505132","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0

Abstract

Graphitic carbon nitride (g-C3N4) has demonstrated potential applications in addressing energy shortages and preserving water ecosystem stability due to its high efficiency in degrading antibiotics. However, the mediocre catalytic performance of bulk g-C3N4 is attributed to inefficient carrier transport and a high complexation rate of photogenerated electron-hole pairs. Herein, a method for fabricating carbon nitride quantum dots (CNQDs) via water vapor intercalation-exfoliation during high-temperature thermo-polymerization of g-C3N4 is proposed. The resulting CNQDs exhibit a high quantum yield (49.8%), reduced bandgap, and pH-dependent properties. Structural nitrogen defects and doping of oxygen-containing functional groups contribute to improved charge-transfer efficiency and enhanced photooxidation capacity of CNQDs from water vapor intercalation-exfoliation. Remarkably, the optimal CNQDs-650 demonstrates excellent photodegradation activity of tetracycline hydrochloride (TCH), ≈2.7 times higher than that of g-C3N4. Additionally, the photo degradation pathways of TCH are proposed based on identified intermediates. This study introduces a new and efficient approach to synthesizing CNQDs with high photocatalytic performance.

Abstract Image

水蒸气插层-剥落制备高量子产率氮化碳量子点高效降解盐酸四环素。
石墨氮化碳(g-C3N4)由于其高效降解抗生素,在解决能源短缺和保持水生态系统稳定性方面具有潜在的应用前景。然而,本体g-C3N4的催化性能一般是由于载流子输运效率低和光生电子-空穴对的络合速率高。本文提出了一种在g-C3N4高温热聚合过程中通过水蒸气插层剥离制备氮化碳量子点的方法。所得CNQDs表现出高量子产率(49.8%),减小带隙和ph依赖性。结构氮缺陷和含氧官能团的掺杂有助于提高CNQDs的电荷传递效率和增强其水蒸气插层剥离的光氧化能力。值得注意的是,优化后的CNQDs-650对盐酸四环素(TCH)的光降解活性比g-C3N4高约2.7倍。此外,根据鉴定的中间体,提出了TCH的光降解途径。本研究介绍了一种合成具有高光催化性能CNQDs的新方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Small
Small 工程技术-材料科学:综合
CiteScore
17.70
自引率
3.80%
发文量
1830
审稿时长
2.1 months
期刊介绍: Small serves as an exceptional platform for both experimental and theoretical studies in fundamental and applied interdisciplinary research at the nano- and microscale. The journal offers a compelling mix of peer-reviewed Research Articles, Reviews, Perspectives, and Comments. With a remarkable 2022 Journal Impact Factor of 13.3 (Journal Citation Reports from Clarivate Analytics, 2023), Small remains among the top multidisciplinary journals, covering a wide range of topics at the interface of materials science, chemistry, physics, engineering, medicine, and biology. Small's readership includes biochemists, biologists, biomedical scientists, chemists, engineers, information technologists, materials scientists, physicists, and theoreticians alike.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:604180095
Book学术官方微信