氮掺杂木质素基碳量子点在次氯酸根离子检测中的应用

doi:10.11896/cldb.23050197

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Abstract Using melamine as a nitrogen source, carbon quantum dots (CQDs) were doped with nitrogen. Nitrogen doped lignin-based carbon quantum dots (N-CQDs) were prepared through a one-step hydrothermal method. Doping nitrogen formed conjugation systems, introduced amino groups, thus improved the fluorescence intensity. Characterization and test of N-CQDs were performed. The average particle size of N-CQDs was 2.7 nm. N-CQDs were composed of many functional groups, including amino, hydroxyl, carboxyl, ether bonds, single bonds between carbon and nitrogen, double bonds between carbon and nitrogen, and benzene ring structures. The optimum excitation and emission wavelength were 400 nm and 500 nm respectively. In the UV-Vis absorption spectra, the absorption peak at 260 nm was due to π-π^* leaps of C=O bond in enzymatic hydrolysis lignin and benzene ring, π-π^* leaps of C=N bond in melamine. The absorption peak at 315 nm was due to n-π^* leaps of C=O bond in enzymatic hydrolysis lignin or benzene ring, n-π^* leaps of C-N bond and C=N bond in melamine. N-CQDs were applied to anion detection, having a sudden inactivation effect on hypochlorite ion (ClO^-). N-CQDs had specific detection for ClO^- and the detection limits were 1.21 μmol/L. N-CQDs could enter live cells successfully and N-CQDs, is harmless to cells, and bright green fluorescence in the cytoplasm of cells could be observed. Based on the good detection for ClO^-, fluorescence effect and harmlessness to cells, N-CQDs have some potential applications in the ion detection and medical field.

Key words： carbon quantum dots nitrogen doped ClO^- detection lignin cell

Published: 25 December 2024 Online: 2024-12-20

CLC number:

O69

Fund:Science and Technology Development Project of Jilin Province(20190902014TC,20210201058GX).

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	Articles by authors
	ZHANG Xiaojun
	WU Jialong
	QIAO Nan
	YU Dayu
	SUN Mojie
	CHEN Jing

Cite this article:

ZHANG Xiaojun,WU Jialong,QIAO Nan, et al. Nitrogen Doped Lignin-based Carbon Quantum Dots for Detection of Hypochlorite Ion[J]. Materials Reports, 2024, 38(24): 23050197-5.

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http://www.mater-rep.com/EN/10.11896/cldb.23050197 OR http://www.mater-rep.com/EN/Y2024/V38/I24/23050197

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