Journal
MICROCHIMICA ACTA
Volume 186, Issue 3, Pages -Publisher
SPRINGER WIEN
DOI: 10.1007/s00604-019-3264-5
Keywords
Nitrogen and phosphorus co-doped carbon dots; Fluorescence enhancement; Cd(II) detection; Chelation enhanced fluorescence
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Funding
- Nature Science Foundation from Science and Technology Department of Fujian Province [2018 J05013]
- Education Research Project for Young and Middle-aged Teachers of Fujian Province [JT180136]
- Outstanding Youth Research Training Program of Fujian Agriculture and Forestry University [xjq201818]
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Nitrogen and phosphorus co-doped carbon dots (N,P-CDs) have been synthesized via hydrothermal method starting from o-phosphorylethanolamine and citric acid. The blue-green fluorescence of the N,P-CDs (with excitation/emission peaks at 325/435nm) isgradually enhanced on sequential addition of Cd(II) ions. This fluorometric assay works in the 0.5M to 12.5M Cd(II) concentration range and has a 0.16M detection limit. The phenomenon may be attributed to chelation enhanced fluorescence that is induced by the formation of Cd(II)-N,P-CDs complex with functional groups present on the surface. The method has applied to the detection of Cd(II) in spiked serum and urine samples and gave satisfying results.
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