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Sensitive detection of cadmium ions based on a quantum-dot-mediated fluorescent visualization sensor

文献类型: 外文期刊

作者: Ai, Qiushuang 1 ; Dong, Yifan 1 ; Yu, Xiren 1 ; Wei, Peiling 2 ; Zhang, Dawen 1 ; Qiu, Suyan 1 ;

作者机构: 1.Jiangxi Acad Agr Sci, Inst Qual & Safety & Stand Agr Prod Res, Minist Agr & Rural Affairs Peoples Republ China, Key Lab Qual & Safety Control Poultry Prod, Nanchang 330200, Jiangxi, Peoples R China

2.Xinjiang Acad Anim Sci, Qual Stand Inst Anim Husb, Urumqi 830011, Xinjiang, Peoples R China

期刊名称:RSC ADVANCES ( 影响因子:3.9; 五年影响因子:3.9 )

ISSN:

年卷期: 2023 年 13 卷 37 期

页码:

收录情况: SCI

摘要: A sensitive ratiometric fluorescent sensor for detecting cadmium ions (Cd2+) was constructed based on carbon quantum dots (CQDs)/CdTe quantum dots (CdTe QDs). Red fluorescence (from CdTe QDs) played the role of the signal response and blue fluorescence (from CQDs) served as a reference probe without a color change. The fluorescent sensor showed high selectivity and sensitivity to Cd2+ with a limit of detection (LOD) of 0.018 & mu;M and a range from 0.1 & mu;M to 23 & mu;M. The proposed method was successfully applied to the determination of Cd2+ in real rice samples. In addition, a fluorescent sensor integrated with a smartphone platform was further designed for the visualized and quantitative detection of Cd2+. This work might extend the range of visualization analysis strategies and provide new insights into the rapid quantitative, portable and sensitive detection of Cd2+ in real-time and on-site applications. A sensitive ratiometric fluorescent sensor for detecting cadmium ions (Cd2+) was constructed based on carbon quantum dots (CQDs)/CdTe quantum dots (CdTe QDs).

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