Mercury(编程语言)
荧光
检出限
量子点
离子
猝灭(荧光)
量子产额
材料科学
纳米技术
碳纤维
分析化学(期刊)
环境化学
光电子学
光化学
环境科学
化学
计算机科学
色谱法
有机化学
复合材料
光学
物理
程序设计语言
复合数
作者
Yunqi Hao,Ying Song,Tingting Li,Yuzhuo Tuo,Miaomiao Tian,Fang Chai
标识
DOI:10.1016/j.jece.2023.109863
摘要
The security of food and drink water is of great concern in our daily life, because the threat from heavy metals pollution in environment is extensively existed. Carbon dots (CDs) is promising for a wide range of applications because of its excellent chemical and optical properties. Herein, yellow emissive carbon dots (YCDs) were constructed by a facile mild condition. The YCDs emitted bright emission at 562 nm with excitation of 420 nm and the quantum yield of 17.44%. The fluorescence of YCDs can be utilized of sensing Hg2+ with limit of 16.8 nM. The mechanism of detection for Hg2+ can be attributed to static quenching effect (SQE) and dynamic quenching effect (DQE) process. A fluorescent portable paper detection platform based on YCDs integrated with a smartphone APP were developed for real-time and rapid analysis of Hg2+ with limit of 0.11 μM. Notably, YCDs were successfully employed to the detection of Hg2+ in various food and real water with recoveries of 97.50 ± 2.63% – 108.64 ± 0.15%, indicated satisfied sensing performance and excellent environmental tolerance. The fluorescence sensing system based on YCDs provided a reference for the construction of portable sensors for hazardous substance monitoring.
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