硫脲
复归
荧光
猝灭(荧光)
碳纤维
氮气
兴奋剂
材料科学
硫黄
化学
光化学
光电子学
有机化学
冶金
光学
生物化学
复合材料
复合数
物理
表型
基因
作者
Cengceng Zhang,Shu Sen Wu,Yuanyuan Yu,Fang Chen
标识
DOI:10.1016/j.saa.2019.117666
摘要
Herein, a facile and quick strategy to detect thiourea was conducted based on the reversion of fluorescence quenching of nitrogen doped carbon dots (NCDs) by Hg2+. The NCDs with good water solubility and 17% of quantum yield was synthesized by one-step hydrothermal method, using ammonium citrate and dextrin as carbon source and nitrogen source, respectively. The fluorescence of NCDs was obviously quenched by Hg2+ and can be recovered, due to stronger interaction between thiourea and Hg2+. There was a good linear relationship between the recovered fluorescence and the concentration of thiourea within range of 0.90-10.0 μM and the detection limit for thiourea detection was 0.15 μM. The as-prepared NCDs can be used for determination of thiourea in tap water, lake water and rice flour products, and the spike recoveries were between 91.6 and 108%.
科研通智能强力驱动
Strongly Powered by AbleSci AI