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Microchimica Acta

, Volume 184, Issue 5, pp 1547–1553 | Cite as

Carbon dots codoped with nitrogen and sulfur are viable fluorescent probes for chromium(VI)

Original Paper

Abstract

Carbon dots codoped with nitrogen and sulfur (N,S-CDs) were synthesized by a single-step hydrothermal method. The N, S-CDs were characterized by transmission electron microscopy, X-ray diffraction, FTIR and X-ray photoelectron spectroscopy in terms of surface morphology, functional groups and surface composition and elemental composition. The CDs possess intense fluorescence and excitation wavelength dependent emission wavelengths. Fluorescence is strongest at an excitation wavelength of 360 nm and typically peaks at 440 nm. The fluorescence of the N,S-CDs is quenched by Cr(VI) ion. Under the 360 nm excitation wavelength condition, fluorescence intensity decreases linearly on increasing the Cr(VI) concentration from 1 μM to 10 μM, and the LOD at a signal-to-noise ratio of 3 was about 0.2 μM. The method was applied to the quantitation of Cr(VI) in spiked real samples and gave satisfactory results.

Graphical abstract

Carbon dots codoped with nitrogen and sulfur (N,S-CDs) were synthesized. These possess intense fluorescence that is quenched by Cr(VI) ion. The this probe can be used for quantitative detection of Cr(VI) ion.

Keywords

Quenching Stern-Volmer plot Nanodots Excitation dependent emission Water analysis Selectivity Inner filter effect XRD FT-IR XPS 

Notes

Acknowledgements

This project was supported by the Climbing Project of Young Teachers of Longyan University (NO. LQ2015025).

Compliance with ethical standards

The author(s) declare that they have no competing interests.

Supplementary material

604_2017_2132_MOESM1_ESM.docx (307 kb)
ESM 1 (DOCX 306 kb)

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Copyright information

© Springer-Verlag Wien 2017

Authors and Affiliations

  1. 1.College of Chemistry and MaterialsLongyan UniversityLongyanPeople’s Republic of China
  2. 2.College of Chemistry and EnvironmentMinnan Normal UniversityZhangzhouPeople’s Republic of China

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