Highly selective, rapid-functioning and sensitive fluorescent test paper based on graphene quantum dots for on-line detection of metal ions. Issue 10 (20th February 2018)

• Record Type: Journal Article
• Authors: Wang, Congxu; Sun, Youyi; Jin, Jianli; Xiong, Zhiyuan; Li, Dan; Yao, Junru; Liu, Yaqing
• Is Part Of: Analytical methods. Volume 10:Issue 10(2018)
• Page Start: 1163
• Page End: 1171
• Publication Date: 2018-02-20
• Subjects: Chemistry, Analytic -- Periodicals; Analytical biochemistry -- Periodicals; Chemical laboratories -- Standards -- Periodicals; 543.1905
• DOI: 10.1039/c7ay02995k
• Languages: English
• ISSNs: 1759-9660

Abstract

Abstract : In this study, test papers based on N-doped graphene quantum dots and graphene quantum dots were designed and prepared. Abstract : 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.