Citation: ZHU Feng-Li, YANG Ling, WANG Ya-Hu, TAN Hai-Hu. Preparation of Doped Carbon Quantum Dots and Its Application in Detection of Heavy Metal Ions[J]. Chinese Journal of Analytical Chemistry, ;2023, 51(1): 22-33. doi: 10.19756/j.issn.0253-3820.221308 shu

Preparation of Doped Carbon Quantum Dots and Its Application in Detection of Heavy Metal Ions

School of Packaging and Materials Engineering, Hunan University of Technology, Zhuzhou 412007, China

Corresponding author: TAN Hai-Hu, haihutan@163.com
Received Date: 22 June 2022
Revised Date: 25 September 2022

Fund Project: Support by the National Natural Science Foundation of China (No.51874129), the China Postdoctoral Science Foundation (No.2021M693549), the Natural Science Foundation of Hunan Province (Nos.2021JJ40178, 2021JJ40179, 2022JJ50061) and the Scientific Research Fund of Hunan Provincial Education Department (Nos.18A260, 20B169, 20B181, 21C0405).

In recent years, carbon quantum dots (CQDs) have attracted much attention due to their unique fluorescence properties, cheap and abundant raw materials, green and convenient synthesis process, good water solubility and biocompatibility, etc. Numerous researches have shown that the fluorescence intensity of CQDs can be enhanced or reduced once the CQDs combine with specific metal ions. Therefore, there is a good application prospect of CQDs to construct the metal ion fluorescence chemosensor. However, the performance of conventional CQDs-based probe with insufficient fluorescence intensity, poor sensitivity and limited selectivity hamper their application in the detection of heavy metal ions. Doping heteroatoms can enrich the energy level structure of CQDs by adjusting the charge density and spin density of carbon atoms, thus enhancing the fluorescence intensity of CQDs. Besides, the doped heteroatoms can also introduce abundant function groups to CQDs and provide more active sites to capture heavy metal ions, which is beneficial for the amplification of fluorescence detection signal. In this paper, the preparation of atom-doped CQDs of nitrogen, sulfur, phosphorus, zinc and copper and their application in the detection of heavy metal ions are reviewed, and the influence of atom doping on the performance of CQDs, the detection mechanism and the application effect are analyzed. On this basis, the future research direction in this field is discussed.
- Carbon quantum dots,
- Heavy metal ion,
- Detection,
- Heteroatom doping,
- Review
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沈阳化工大学材料科学与工程学院沈阳 110142