微波辐射下制备的用于高灵敏度检测汞离子的新型氮掺杂碳点
Novel nitrogen-doped carbon dots prepared under microwave-irradiation for highly sensitive detection of mercury ions.
作者信息
Ghanem Ali, Al-Qassar Bani Al-Marjeh Rama, Atassi Yomen
机构信息
Department of Applied Physics, Higher Institute for Applied Sciences and Technology, Damascus, Syria.
出版信息
Heliyon. 2020 Apr 17;6(4):e03750. doi: 10.1016/j.heliyon.2020.e03750. eCollection 2020 Apr.
In this paper, new nitrogen doped carbon dots with a high quantum yield and novel optical properties were synthesized by a simple and fast one step microwave-assisted synthesis. Citric acid monohydrate was used as a carbon source and 2,2-dimethyl-1,3-propanediamine as nitrogen source. The prepared N-CDs were characterized by Fourier transform infrared, Raman, UV-visible and photoluminescence spectroscopies. Transmission electron microscope (TEM) images revealed that the N-CDs have distinctive flake-shape morphology. The N-CDs exhibit bright blue luminescence and quenching response towards Hg ions. The quenching sensitivity was investigated. The results indicate a limit of detection as low as 7.63 nM and a linear relationship over the range 0-4.2 μM. In addition, the prepared N-CDs were tested as sensor for pH in the range from 1 to 7.
本文通过简单快速的一步微波辅助合成法，合成了具有高量子产率和新颖光学性质的新型氮掺杂碳点。以一水柠檬酸为碳源，2,2-二甲基-1,3-丙二胺为氮源。采用傅里叶变换红外光谱、拉曼光谱、紫外可见光谱和光致发光光谱对制备的氮掺杂碳点进行了表征。透射电子显微镜（TEM）图像显示，氮掺杂碳点具有独特的片状形态。氮掺杂碳点呈现亮蓝色发光，并对汞离子有猝灭响应。研究了猝灭灵敏度。结果表明，检测限低至7.63 nM，在0-4.2 μM范围内呈线性关系。此外，还测试了制备的氮掺杂碳点作为1至7范围内pH传感器的性能。
Zotero 插件