Green preparation of carbon quantum dots with wolfberry as on-off-on nanosensors for the detection of Fe3+ and L-ascorbic acid
文献类型： 外文期刊
作者： Gu, Lin 1 ; Zhang, Jingru 1 ; Yang, Guangxin 2 ; Tang, Yunyu 2 ; Zhang, Xuan 2 ; Huang, Xuanyun 2 ; Zhai, Wenlei 3 ; Fodjo, Essy Kouadio 4 ; Kong, Cong 2 ;
作者机构： 1.Univ Shanghai Sci & Technol, Sch Environm & Architecture, Shanghai 200090, Peoples R China
2.Chinese Acad Fishery Sci, East China Sea Fisheries Res Inst, Shanghai 200090, Peoples R China
3.Beijing Res Ctr Agr Stand & Testing, 9 Middle Rd Shuguanghuayuan, Beijing 100097, Peoples R China
4.Univ Felix Houphouet Boigny, Phys Chem Lab, UFR SSMT, 22 BP 582, Abidjan 22, Cote Ivoire
关键词： Carbon quantum dots; Fluorescence; Ferrite; L-Ascorbic acid; Nanosensor
期刊名称：FOOD CHEMISTRY （ 影响因子：9.231； 五年影响因子：8.795 ）
ISSN： 0308-8146
年卷期： 2022 年 376 卷
页码：
收录情况： SCI
摘要： A green and facile hydrothermal synthesis approach is proposed for the preparation of nitrogen-doped carbon quantum dots (N-CQDs) with wolfberry. These N-CQDs were developed as a highly sensitive fluorescent 'on-off-on' switch sensor for the sensing of Fe3+ and L-ascorbic acid (AA). The N-CQDs displayed superior fluorescence characteristics of CQDs with a quantum yield up to 22%. The N-CQDs were demonstrated to selectively react with Fe3+, leading to fluorescence quenching effect, which was successfully used for the detection of Fe3+ with a limit of detection at 3 mu moL.L-1. The addition of AA is supposed to repair the surface defects, and result in the fluorescence recovery. Based on this effect, the strategy of 'on-off-on' detection of AA was established with a limit of detection at 1.8 mu moL.L-1. Furthermore, the practical application of the detection of Fe3+ lake water and AA in medical tablet was demonstrated, promising an effective and efficient 'on-off-on' nanosensor with low-cost, green synthesis for Fe3+ and AA detection.
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