1,2-dithioglycol functionalised carbon nitride quantum dots as a "turn - off" fluorescent sensor for mercury ion detection

被引：4
|
作者：
Wang, Jun [1 ]
Cao, Yu [1 ]
Wang, Chengyin [1 ]
Chong, Hui [1 ]
Wang, Guoxiu [2 ]
机构：
[1] Yangzhou Univ, Coll Chem & Chem Engn, Yangzhou, Jiangsu, Peoples R China
[2] Univ Technol, Sch Math & Phys Sci, Sydney, NSW, Australia
来源：
INTERNATIONAL JOURNAL OF ENVIRONMENTAL ANALYTICAL CHEMISTRY | 2019年 / 99卷 / 08期
基金：
中国国家自然科学基金;
关键词：
DTG-CNQDs; surface functionalisation; fluorescent probe; mercury ion; SOLID-PHASE EXTRACTION; COLD VAPOR GENERATION; SELECTIVE DETECTION; SPECIATION ANALYSIS; AQUEOUS-SOLUTION; WATER SAMPLES; SPECTROMETRY; GLUTATHIONE; PROBE; ACID;
D O I：
10.1080/03067319.2019.1611800
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
A kind of 1,2-dithioglycol (DTG) functionalised carbon nitride quantum dots (DTG-CNQDs) was designed for the first time by modifying DTG on the surface of carbon nitride quantum dots (CNQDs). The as-prepared DTG-CNQDs exhibit strong blue fluorescence under ultraviolet light and have a high quantum yield of 27%. Experiments show that Hg2+ has a good quenching effect on the fluorescence of DTG-CNQDs. In phosphate buffer (PBS, 10mM, pH 6.0), the fluorescence quenching rate (F-0/F) has a good linear relationship with the concentration of Hg2+ in the range of 0.020-0.50 mu M with detection limit of 0.63nM. This fluorescent probe possesses high sensitivity and good selectivity, which can be applied in the rapid detection of Hg2+ in tap and lake water samples.
引用
收藏
页码：796 / 807
页数：12
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