Carbon quantum dots derived from marine Eucheuma denticulatum for the efficient and sensitive detection of tetracycline

文献类型： 外文期刊

第一作者： Li, Wanjun

作者： Li, Wanjun;Luo, Kun;Wen, Yanmei;Lv, Mingzhe

作者机构：

关键词： Eucheuma denticulatum; Carbon quantum dots; Fluorescent; Tetracycline detection

期刊名称：JOURNAL OF NANOPARTICLE RESEARCH （ 影响因子：2.5； 五年影响因子：2.3 ）

ISSN： 1388-0764

年卷期： 2024 年 26 卷 4 期

页码：

收录情况： SCI

摘要： In this study, Eucheuma denticulatum marine algae were used as the raw material to prepare Eucheuma denticulatum-derived carbon quantum dots (E-CQDs) via a mild chemical oxidation method. The E-CQDs demonstrated good stability and water solubility owing to the presence of hydroxyl groups on the surface. The structure and chemical composition of the E-CQDs were characterized by three means, including transmission electron microscopy (TEM), Fourier transform infrared (FT-IR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). The E-CQDs maintained exceptional stability under varying ion concentrations, pH levels, ultraviolet (UV) irradiation durations, and temperatures. The fluorescence quenching effect of tetracycline (TC) on the E-CQDs was utilized to establish a sensitive and selective TC fluorescence detection method. The mechanism of the TC quenching of the fluorescence of E-CQDs involved an internal filtration effect and dynamic quenching. At the TC concentration of 20-100 mu M, the fluorescence intensity showed an excellent linear relationship (R-2 = 0.997); the limit of detection and quantity was 0.47 mu M and 1.57 mu M, respectively. These results revealed that this method for TC detection offers good selectivity and immunity to interference.

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