摘要
将碳点(CDs)和发光材料金纳米团簇(AuNCs)封装在沸石咪唑酸框架(ZIF-8)中,构建了CDs/AuNCs@ZIF-8双发射比率荧光传感器。表征了其形貌和光学性能,探讨了铅离子(Pb^(2+))对该比率探针的荧光猝灭机理。根据Pb^(2+)对比率探针的猝灭作用,利用该比率探针的荧光强度比值(F_(644)/F_(460))的变化定性定量检测Pb^(2+)。在最佳条件下,CDs/AuNCs@ZIF-8对Pb^(2+)的检测范围为9~140μmol/L,检出限为3.61μmol/L。将该双发射比率荧光传感器应用于实际水样的测定,加标回收率在93.0%~111.2%之间,相对标准偏差(RSD)小于7.0%。该方法能够用于实际样品中Pb^(2+)的检测。
Encapsulation of luminescent materials of gold nanoclusters(AuNCs)and carbon dots(CDs)onto zeolite imidazolic acid framework(ZIF-8)was used to establish CDs/AuNCs@ZIF-8 dual emission ratio fluorescence sensor.Optical properties and morphology of CDs/AuNCs@ZIF-8 were characterized,and the fluorescence quenching mechanism of Pb^(2+)on the ratio fluorescence probe was explored.According to the quenching effect of Pb2_on the ratio probe,qualitative and quantitative detection of Pb^(2+)using the change of fluorescence intensity ratio of the probe(F_(644)/F_(460))was achieved.Under the optimal conditions,the detection range of Pb^(2+)was 9-140μmol/L,and the limit of detection was 3.61μmol/L.The dual emission ratio fluorescence sensor was applied to the determination of Pb in actual water samples,the spiked recoveries were between 93.0%and 111.2%,and the relative standard deviation(RSDs)were less than 7.0%,indicating that this method could be applied to the detection of Pb^(2+)in actual samples.
作者
刘素青
谢锋
周艳
何雨
LIU Suqing;XIE Feng;ZHOU Yan;HE Yu(School of Public Health,Key Laboratory of Environmental Pollution Monitoring and Disease Control,Ministry of Education,Guizhou Provincial Engineering Research Center of Ecological Food Innovation,Guizhou Medical University,Guiyang 561113,China;Cuizhou Provincial Institute of Analysis and Testing,Guiyang 550002,China)
出处
《分析试验室》
EI
CAS
CSCD
北大核心
2024年第8期1190-1195,共6页
Chinese Journal of Analysis Laboratory
基金
贵州省科技计划项目(黔科合基础-ZK[2022]一般348)
贵州医科大学博士启动基金(校博合J字[2020]056号)资助。
