pH assisted selective detection of Hg(II) and Ag(I) based on nitrogen-rich carbon dots
Luo, L (Luo, Liang)[ 1,2 ]; Wang, P (Wang, Pei)[ 3 ]; Wang, YH (Wang, Yuanhao)[ 3 ]; Wang, F (Wang, Fu)[ 1,2 ]
2018
Source PublicationSENSORS AND ACTUATORS B-CHEMICAL
ISSN0925-4005
Volume2763Issue:11Pages:1640-1647
Abstract

Novel nitrogen rich carbon dots were synthesized via a hydrothermal method by using with 2,4,6-triamino-pyrimidine as the precursor. X-ray photoelectron spectroscopy showed that the carbon dots contained 41 at.% nitrogen; this is significantly higher than previously reported values for similar materials. When exposed to ultraviolet light, the carbon dots in solution emitted bright blue fluorescence, with a maximum quantum yield of 74.9%. The fluorescence was selectively quenched by Hg(II) at pH 6 and Ag(I) at pH 11, with detection limits of 11.4 and 10.3 nM, respectively. Analysis of the fluorescence lifetimes of the carbon dots showed that the fluorescence-quenching mechanism for Hg(II) differed from that for Ag(I). In analysis of lake water, the nitrogen rich carbon dots were highly sensitive, and gave a wide linear range and satisfactory recovery. These results suggest that the carbon dots are suitable for use as novel metal ion probes for the selective detection of different ions at different pH values.

KeywordCarbon Dots 2,4,6-triaminopyrimidine Fluorescent Probe Hg(Ii) And Ag(i) Detection Ph Assisted Selectivity
DOI10.1016/j.snb.2018.07.090
Indexed BySCI
WOS IDWOS:000441519000200
Citation statistics
Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/5553
Collection中国科学院特殊环境功能材料与器件重点试验室
Affiliation1.Shanghai Jiao Tong Univ, Sch Environm Sci & Engn, 800 Dongchuan Rd, Shanghai 200240, Peoples R China
2.Shanghai Inst Pollut Control & Ecol Secur, Shanghai 200092, Peoples R China
3.Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Lab Environm Sci & Technol, Urumqi 830011, Xinjiang, Peoples R China
Recommended Citation
GB/T 7714
Luo, L ,Wang, P ,Wang, YH ,et al. pH assisted selective detection of Hg(II) and Ag(I) based on nitrogen-rich carbon dots[J]. SENSORS AND ACTUATORS B-CHEMICAL,2018,2763(11):1640-1647.
APA Luo, L ,Wang, P ,Wang, YH ,&Wang, F .(2018).pH assisted selective detection of Hg(II) and Ag(I) based on nitrogen-rich carbon dots.SENSORS AND ACTUATORS B-CHEMICAL,2763(11),1640-1647.
MLA Luo, L ,et al."pH assisted selective detection of Hg(II) and Ag(I) based on nitrogen-rich carbon dots".SENSORS AND ACTUATORS B-CHEMICAL 2763.11(2018):1640-1647.
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