期刊
MICROCHIMICA ACTA
卷 186, 期 3, 页码 -出版社
SPRINGER WIEN
DOI: 10.1007/s00604-019-3249-4
关键词
Nitrogen doped graphene quantum dots; Fluorescentprobe; Fluorescence quenching; Hg2+ detection; Modified Stern-Volmer equation; Static and dynamic quenching
资金
- Science Foundation of China [61635004, 61705023, 61705024, 11574161, 61405023]
- Key Research and Development Project of Ministry of Science and Technology [2016YFC0801200]
- Chongqing Postdoctoral Program for Innovative Talents [CQBX201703]
- Postdoctoral Science Foundation of Chongqing [Xm2017047]
- Natural Science Foundation of Chongqing [cstc2018jcyjAX0644]
- Science and Technology on Plasma Physics Laboratory [6142A0403050817]
- National Science Fund for Distinguished Young Scholars [61825501]
A highly selective fluorescent probe for Hg2+ is reported. It consists ofnitrogen doped graphene quantum dots (NGQDs) that are nearly sphericalin shape, have an average diameter of 2.7nm and excitation-independent emission. The bluefluorescence of the NGQDs (with maximum excitation/emission at 378/447nm) is quenched by Hg2+ due to both dynamic and static quenching. The probe has a wide detection range (2.5M - 800M) and a limit of detection of 2.5M. The dynamic andstaticquenching constants are 417M(-1) and 63500M(-1), respectively. The probe was used to quantfy Hg2+ in spiked real water samples with satisfactory results.
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