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Preparation of coal-based carbon quantum dots and their fluorescence properties

文献类型： 外文期刊

作者： Jiang, Wenyuan 1 ; He, Hongyu 1 ; Wang, Cheng 1 ; Zhang, Yonglong 1 ; Lu, Yunfei 1 ; Zhang, Qiang 1 ; Wang, Suhua 2 ; Zhang, Xianmei 3 ; Hao, Xiangyang 1 ; Sun, Mingtai 2 ;

作者机构： 1.China Univ Geosci, Beijing Key Lab Mat Utilizat Nonmet Minerals & Sol, Sch Mat Sci & Technol,Natl Lab Mineral Mat, Engn Res Ctr,Minist Educ Geol Carbon Storage & Low, Beijing 100083, Peoples R China

2.Guangdong Univ Petrochem Technol, Sch Environm Sci & Engn, Guangdong Prov Key Lab Green Agr Prod & Intelligen, Maoming 525000, Peoples R China

3.Chinese Acad Agr Sci, State Key Lab Efficient Utilizat Arid & Semiarid A, Beijing 100081, Peoples R China

4.Chinese Acad Agr Sci, Key Lab Arable Land Qual Monitoring & Evaluat, Minist Agr & Rural Affairs, Beijing 100081, Peoples R China

5.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China

关键词： Carbon quantum dots (CQDs); Nitric acid oxidation; Fluorescence quantum yield (QY); Scholl reaction; Low-rank coal

期刊名称：MICROCHEMICAL JOURNAL （ 影响因子：5.1； 五年影响因子：4.7 ）

ISSN： 0026-265X

年卷期： 2024 年 207 卷

页码：

收录情况： SCI

摘要： In the field of life sciences, cellular movements play a significant role in influencing the activities of organisms. Current methodologies have limitations in the monitoring of cell recognition, biological macromolecule localization, cell labeling, migration, and biosensors. Although metal-semiconductor quantum dots are commonly used, they may pose toxicity risks to the lungs and kidneys. On the other hand, carbon quantum dots possess the unique optoelectronic properties of traditional quantum dots while exhibiting low toxicity, good biocompatibility, excellent photostability, and abundant raw material sources. In this research, carbon quantum dots were synthesized using the nitric acid oxidation method. The study investigated the effects of temperature, time, and the type of low-rank coal on the synthesis of carbon quantum dots. The structure and properties of the carbon quantum dots, specifically their fluorescence characteristics, were thoroughly analyzed. The proposed synthesis approach includes the nitration of coal macromolecules and the thickening of aromatic clusters through the Scholl reaction, leading to enhanced fluorescence quantum efficiency. The findings of this study indicate that the carbon quantum dots produced through this method demonstrate a high fluorescence quantum yield, making them ideal fluorescent agents for material preparation and offering potential applications in the field of life sciences.

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