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The fabrication of N, S co-doped carbon dots and cascade sensing Hg2+and bovine serum albumin in food with reversible strategy

文献类型： 外文期刊

作者： Tuo, Yuzhuo 1 ; Li, Zhuoying 1 ; Xu, Ruiyuan 1 ; Cui, Tingting 1 ; Zhang, Fang 2 ; Yang, Huiyi 3 ; Liu, Bangyu 1 ; Cao, Liangzi 5 ; Chai, Fang 1 ;

作者机构： 1.Harbin Normal Univ, Coll Chem & Chem Engn, Key Lab Photochem Biomat & Energy Storage Mat Heil, Minist Educ,Key Lab Photon & Elect Bandgap Mat, Harbin 150025, Peoples R China

2.Purple Mt Labs, Nanjing, Jiangsu, Peoples R China

3.Univ Greenwich, Nat Resources Inst, London, England

4.Univ Leeds, Sch Earth & Environm, Leeds, England

5.Heilongjiang Acad Agr Sci, Inst Tillage & Cultivat, Harbin, Peoples R China

6.Heilongjiang Rice Qual Improvement & Genet Breedin, Harbin, Peoples R China

关键词： NS-CDs; Fluorescence; Mercury ion; Bovine serum albumin; Real food samples

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 493 卷

页码：

收录情况： SCI

摘要： High-performance effective and precise detection of Hg2+ possesses great significance for ensuring environmental, food safety and public health, but still a great challenge. Here, efficient fabrication of NS-doped carbon dots (NS-CDs) were achieved and applied as fluorescent probe for cascade sensing Hg2+ and BSA. NS-CDs emitted green emission at 500 nm under 355 nm excitation. The sensing performance of Hg2+ and bovine serum albumin (BSA) of NS-CDs was evaluated using a reversible "on-off-on" strategy, yielding detection limits of 16.5 nM and 17.0 nM. Further, the smartphone assisted sensing reproduced the reversible performance with visual and intelligent readout. Satisfied recoveries were attained in detection in real water and foods, enabled on-site evaluation of Hg2+ and BSA levels. The proposed cascade sensing strategy and reversible logic-gate illustration exhibited an innovative idea for designing CDs, and broaden their potential applications in multivariate sensing, which promoted the development of multi-functional CDs and promising application.

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