High-Quantum-Yield Carbon Nitride Quantum Dots via Water Vapor Intercalation-Exfoliation for Efficient Tetracycline Hydrochloride Degradation
文献类型： 外文期刊
作者： Song, Wanlong 1 ; Zhang, Niuniu 1 ; Li, Jianing 2 ; Ma, Xiaojun 1 ; Li, Dongna 1 ; Li, Jie 1 ;
作者机构： 1.Tianjin Univ Sci & Technol, Coll Light Ind Sci & Engn, Tianjin 300457, Peoples R China
2.Chinese Acad Trop Agr Sci, Rubber Res Inst, State Key Lab Breeding Cultivat & Physiol Trop Cro, Key Lab Biol & Genet Resources Rubber Tree, Haikou 571737, Peoples R China
关键词： CNQDs; intercalation-exfoliation; nitrogen defects; oxygen doping; tetracycline hydrochloride degradation
期刊名称：SMALL （ 影响因子：12.1； 五年影响因子：12.5 ）
ISSN： 1613-6810
年卷期： 2025 年 21 卷 36 期
页码：
收录情况： SCI
摘要： 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), approximate to 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.
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