柠檬酸
荧光
碳纤维
量子点
检出限
化学
光漂白
热液循环
碳量子点
粒径
X射线光电子能谱
粒子(生态学)
傅里叶变换红外光谱
分析化学(期刊)
核化学
纳米技术
色谱法
材料科学
物理
光学
化学工程
有机化学
复合材料
物理化学
工程类
地质学
海洋学
复合数
作者
Wenbin Bao,Yubin Lan,Hai-Qin Lu,Guowei Li,Meihua Yu,Jiachu Yang,Liubai Wei,Qionghua Su
标识
DOI:10.1002/slct.202202375
摘要
Abstract There are few researches on the application of multifunctional carbon quantum dots (CQDs) in analysis and detection. In this study, carbon quantum dots (CQDs) with dual‐function detection were synthesized by the one‐step hydrothermal method with citric acid as the carbon source and o‐phenylendiamine as the nitrogen source to detect Fe 3+ and sunset yellow. The morphology of the prepared CQDs and the surface functional groups were characterized using TEM, FTIR, XPS, UV‐Vis spectroscopy, and fluorescence spectrophotometer. The results show that the morphology of CQDs is nearly spherical and well dispersed, with a particle size range of 1.24∼6 nm and the average particle size was 3.23 nm. The surface of the CQDs has hydrophilic groups, such as OH, −COOH and −NH 2 . CQDs exhibited good acid and alkali resistance, salt resistance, and photobleaching resistance under different conditions. The detection limits of CQDs for Fe 3+ and sunset yellow were 1.52 μM and 0.812 μM, respectively. The recoveries of actual samples were 96.65 %∼104.85 % and 95.4 %∼104.55 %, with relative standard deviations (RSDs) of less than 6 %. Therefore, CQDs can be employed as dual‐function fluorescent probes in the practical detection of samples and have promising application prospects.
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