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Cu2+修饰的氮掺杂石墨烯量子点荧光传感器检测2-巯基苯并噻唑的研究
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作者单位
王晓敏,范哲锋 山西师范大学化学与材料科学学院 
基金项目:贵州省联合基金项目(黔科合LH字[2014]7619);贵州大学教改项目(JG 2013014)
中文摘要:采用一步水热合成法制备了氮掺杂石墨烯量子点(N-GQDs),量子点表面的特定官能团与Cu2+进一步结合后,形成N-GQDs-Cu2+络合物,有效地猝灭了荧光。加入2-巯基苯并噻唑(MBT)时,由于MBT与Cu2+具有强作用力,使得Cu2+从量子点表面解离下来,量子点荧光恢复。据此构建了一种基于Cu2+修饰的氮掺杂石墨烯量子点的高灵敏荧光传感器用于MBT的检测。在最佳实验条件下,MBT在0.4~40.0 μmol/L浓度范围内与荧光恢复强度呈良好线性,检出限为0.1 μmol/L。该方法用于实际水样中MBT的检测,加标回收率为95.0%~101%。
中文关键词:氮掺杂石墨烯量子点(N-GQDs)  荧光传感器  铜离子  2-巯基苯并噻唑(MBT)
 
Study on Determination of 2-Mercaptobenzothiazole Using a Fluorescence Sensor with Cu2+ Modified Nitrogen-doped Graphene Quantum Dots
Abstract:In this paper,nitrogen-doped graphene quantum dots(N-GQDs) were prepared by one-step hydrothermal synthesis.Cu2+ ions were combined with the specific functional groups on surfaces of the quantum dots to form N-GQDs-Cu2+ complexes,which could quench fluorescence effectively.Furthermore,when 2-mercaptobenzothiazole(MBT) was added,Cu2+ were dissociated from the surface of the quantum dots due to the strong force of MBT and Cu2+,and the fluorescence from the quantum dots was recovered.Thus,a highly sensitive fluorescence sensor based on Cu2+ modified N-GQDsnitrogen-doped graphene quantum dots was constructed for the detection of MBT.Under the optimal experimental conditions,there was a good linear relationship between MBT and fluorescence recovery intensity in the concentration range of 0.4-40.0 μmol/L,and the limit of detection was 0.1 μmol/L.The method could be applied in the detection of MBT in real water samples with spiked recoveries of 95.0%-101%.
Key Words:nitrogen-doped graphene quantum dots(N-GQDs)  fluorescent sensor  copper ion  2-mercaptobenzothiazole(MBT)
引用本文:王晓敏,范哲锋.Cu2+修饰的氮掺杂石墨烯量子点荧光传感器检测2-巯基苯并噻唑的研究[J].分析测试学报,2019,(6):693-698.
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