Preparation of Nitrogen-Doped Biomass-Based Carbon Quantum Dots and their Application to Fe3+ Detection and Bioimaging

文献类型： 外文期刊

第一作者： Lv, Rui

作者： Lv, Rui;Wu, Liyu;Huang, Dongke;Lei, Yanqiu;Liu, Fenrong;Tian, Fuli;Bai, Hongmei

作者机构：

关键词： Carbon Quantum Dots; Nitrogen-Doped; Sheep Manure; Ion Detection; High-Efficiency

期刊名称：JOURNAL OF FLUORESCENCE （ 影响因子：3.1； 五年影响因子：2.9 ）

ISSN： 1053-0509

年卷期： 2025 年

页码：

收录情况： SCI

摘要： Carbon quantum dots are a new type of fluorescent material with promising application prospects in bioimaging, photocatalysis, and metal ions detection. Biomass is a plentiful and renewable natural resource containing a large amount of carbon, hydrogen and oxygen, and is an ideal precursor for the preparation of carbon quantum dots. Although biomass-based carbon dots possess numerous advantages, there are still several challenges. Specifically, the luminescence mechanism remains unidentified. Additionally, how to control the surface functionalization of biomass-based carbon dots is also a challenge. In this work, nitrogen-doped carbon quantum dots were synthesized sheep manure with glycine under optimized hydrothermal conditions to enhance nitrogen-containing functional groups. The results showed that the nitrogen-doped carbon quantum dots were synthesized when sheep manure mixed with glycine in a mass ratio of 4:1 and reacted at 240 degrees C for 12 h exhibited a quantum yield of 10.63%, a fluorescence lifetime of 7.82 ns, and exceptional stability-retaining fluorescence intensity above 630,855 a.u. after 30 days of storage. Furthermore, the nitrogen-doped carbon quantum dots exhibit high selectivity and sensitivity to Fe3+ (detection limit:4.7 mu M, linear range: 0-200 mu M) along with excellent bioimaging performance in L929 cells, demonstrating their dual-functional applications in both environmental sensing and bioimaging.

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