N-doped carbon dots as the multifunctional fluorescent probe for mercury ion, glutathione and pH detection

被引：7

作者：

Chen, Shenna ^{[1
]}

Hao, Yunping ^{[1
]}

Li, Ronghui ^{[1
]}

Liu, Yanxu ^{[1
]}

Li, Jinxia ^{[2
]}

Geng, Lina ^{[1
]}

机构：

[1] Hebei Normal Univ, Coll Chem & Mat Sci, Hebei Key Lab Organ Funct Mol, Shijiazhuang 050024, Peoples R China

[2] Hebei Univ Econ & Business, Sch Informat Technol, Shijiazhuang 050061, Peoples R China

来源：

NANOTECHNOLOGY | 2023年 / 34卷 / 12期

基金：

中国国家自然科学基金;

关键词：

carbon dots; fluorescence; sensor; pH; Hg2+; glutathione; QUANTUM DOTS; SENSOR; PHOTOLUMINESCENCE; MECHANISM; PLATFORM; FACILE; GREEN;

D O I：

10.1088/1361-6528/acade7

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Recently, carbon dots (CDs) have exhibited promising applications in the fluorescence detection of various ions and biomolecules. In this work, one kind of nitrogen-doped CDs (N-CDs) with high fluorescence intensity was synthesized, characterized by transmission electron microscopy, x-ray diffraction, x-ray photoelectron spectroscopy, Fourier-transform infrared, UV-vis absorption spectra, and fluorescence spectra. The results show that the spherical and uniform N-CDs (quantum yield: 60.2%) have remarkable fluorescence properties and photostability, which makes N-CDs can be utilized as an 'on-off-on' sensor for Hg2+ and glutathione (GSH). In addition, the pH-sensitive behavior of N-CDs makes it also applicable to H+ detection under acid conditions (pKa = 3.53). The linear range of the 'turn-off' sensor detecting Hg2+ was 0.014-50 mu M, with a 0.014 mu M limit of detection (LOD). GSH was detected by the fluorescence 'turn-on' method with a linear range of 0.125-60 mu M and a LOD of 0.125 mu M. The outstanding performance of N-CDs makes it potential applications in ecological pollution and biomolecule visualization monitoring.

引用

页数：10

共 48 条

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