Study on Determination of 2-Mercaptobenzothiazole Using a Fluorescence Sensor with Cu2+ Modified Nitrogen-doped Graphene Quantum Dots

王晓敏; 范哲锋

doi:doi：10.3969/j.issn.1004-4957.2019.06.010

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Study on Determination of 2-Mercaptobenzothiazole Using a Fluorescence Sensor with Cu2+ Modified Nitrogen-doped Graphene Quantum Dots

- Study on Determination of 2-Mercaptobenzothiazole Using a Fluorescence Sensor with Cu2+ Modified Nitrogen-doped Graphene Quantum Dots
- Vol. 38, Issue 6, Pages: 693-698(2019)
- 作者机构：
  
  山西师范大学化学与材料科学学院
- 作者简介：
- 基金信息：
- DOI：doi：10.3969/j.issn.1004-4957.2019.06.010
  CLC：
- Published：2019
- 稿件说明：
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王晓敏, 范哲锋. Study on Determination of 2-Mercaptobenzothiazole Using a Fluorescence Sensor with Cu2+ Modified Nitrogen-doped Graphene Quantum Dots[J]. 2019, 38(6): 693-698.
DOI：

王晓敏, 范哲锋. Study on Determination of 2-Mercaptobenzothiazole Using a Fluorescence Sensor with Cu2+ Modified Nitrogen-doped Graphene Quantum Dots[J]. 2019, 38(6): 693-698. DOI： doi：10.3969/j.issn.1004-4957.2019.06.010.

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%。

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%.

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引言

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Related Institution

Agricultural Product Quality and Safety Research Center，Tea Research Institute of Chinese Academy of Agricultural Sciences

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Key Laboratory of Optic-electric Sensing and Analytical Chemistry for Life Science， MOE； Shandong Key Laboratory of Biochemical Analysis； College of Chemistry and Molecular Engineering，Qingdao University of Science and Technology

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