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Highly selective, rapid-functioning and sensitive fluorescent test paper based on graphene quantum dots for on-line detection of metal ions
Analytical Methods ( IF 3.1 ) Pub Date : 2018-02-06 00:00:00 , DOI: 10.1039/c7ay02995k
Congxu Wang 1, 2, 3, 4 , Youyi Sun 1, 2, 3, 4, 5 , Jianli Jin 1, 2, 3, 4 , Zhiyuan Xiong 5, 6, 7, 8 , Dan Li 5, 6, 7, 8 , Junru Yao 1, 2, 3, 4 , Yaqing Liu 1, 2, 3, 4
Affiliation  

In this study, test papers based on N-doped graphene quantum dots and graphene quantum dots were designed and prepared. They exhibited a highly selective fluorescence quenching response to Hg(II) and Fe(III) in water for 3.0 s to 2.0 min, respectively. Furthermore, low detection limit (0.1 μM) of the test papers was obtained, which was lower than the toxic level of Hg(II) and Fe(III). Moreover, the concentration of metal ions in water was directly determined according to the quenching time of the fluorescent test paper observed by the naked eye. Therefore, a convenient paper sensor for the rapid, sensitive and selective detection of metal ions in water was developed, which was expected to be applied in the accurate detection and large-scale monitoring of heavy metal pollution in the environment.

中文翻译:

基于石墨烯量子点的高选择性,快速功能和灵敏的荧光试纸,用于在线检测金属离子

本研究设计并制备了基于N掺杂石墨烯量子点和石墨烯量子点的试纸。它们分别对水中的Hg(II)和Fe(III)表现出高选择性的荧光猝灭响应,持续时间为3.0 s至2.0 min。此外,获得了较低的检测限(0.1μM),低于Hg(II)和Fe(III)的毒性水平。)。此外,水中的金属离子浓度是根据肉眼观察的荧光试纸的淬灭时间直接确定的。因此,开发了一种用于快速,灵敏和选择性地检测水中金属离子的便捷纸传感器,有望将其用于环境中重金属污染的准确检测和大规模监测。
更新日期:2018-02-06
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