A novel electrochemiluminescence sensor based on Ni-Co NCs@C3N QDs nanocomposites with poly-L-cysteine as co-reaction accelerator for ultrasensitive detection of vitamin K1

文献类型： 外文期刊

第一作者： Ning, Lingya

作者： Ning, Lingya;Yang, Fei;Wang, Junping;Wang, Zixiao;Yu, Ming;Wang, Junping

作者机构：

关键词： Electrochemiluminescence; Quantum dots; Prussian blue analogues; Vitamin K 1

期刊名称：FOOD CHEMISTRY （ 影响因子：9.8； 五年影响因子：9.7 ）

ISSN： 0308-8146

年卷期： 2025 年 471 卷

页码：

收录情况： SCI

摘要： A novel electrochemiluminescence (ECL) sensor based on eco-friendly C3N QDs was constructed for the ultrasensitive detection of VK1. The synthesized Ni-Co nanocages (Ni-Co NCs) with large specific surface area and high catalytic activity were used to effectively load C3N QDs, forming the nanocomposites (Ni-Co NCs@C3N QDs) with good luminescent properties. After grafting Ni-Co NCs@C3N QDs onto poly-L-cysteine film, the ECL system achieved multiple signal amplification, which was due to the fact that poly-L-cysteine as a co-reactant accelerator sped up the generation of more SO4 - center dot from S2O82- . Under the optimal conditions, the ECL sensor exhibited a wide detection range for VK1 from 1.0 x 10-9 to 5.0 x 10-5 mol/L and a low detection limit of 1.65 x 10-10 mol/L. Furthermore, the spiked recoveries in milk, apples, and celery were in the range of 83.50 %- 105.32 %, proving the feasibility of the prepared ECL sensor in actual sample detection.

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