Microchimica Acta

, 186:281 | Cite as

A turn-on fluorescent sulfide probe prepared from carbon dots and MnO2 nanosheets

  • Jinshui LiuEmail author
  • Chenfu Liu
  • Zihan Zhou
Original Paper


A turn-on fluorescent sulfide probe was prepared from carbon dots (CDs; synthesized using an environmentally friendly method) and MnO2 nanosheets. In this composite probe, the fluorescence of the CDs (with excitation/emission peaks at 330/430 nm) is quenched by the MnO2 nanosheets through an inner filter effect. Introducing sulfide causes the MnO2 nanosheets to be disintegrated through a redox reaction between sulfide and MnO2. Hence, the blue fluorescence of the CDs is restored. Under the optimum conditions, fluorescence increases linearly in the 2–25 μM sulfide concentration range. The detection limit is 0.8 μM. The method was used to analyze spiked real water samples, and satisfactory results were achieved.

Graphical abstract

Schematic of the detecting sulfide ions using the carbon dots/MnO2 fluorescence probe based on the recovery of carbon dot fluorescence when sulfide ions are added.


Fluorescence quenching Sulfide probe Nanomaterial Inner filter effect Redox reaction 



This work was supported by the National Natural Science Foundation of China (21205002, 21762004) and the Natural Science Foundation of Anhui Province, China (1708085 MB48).

Compliance with ethical standards

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

Supplementary material

604_2019_3413_MOESM1_ESM.doc (322 kb)
ESM 1 (DOC 322 kb)


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Copyright information

© Springer-Verlag GmbH Austria, part of Springer Nature 2019

Authors and Affiliations

  1. 1.College of Chemistry and Materials Science, Anhui Key Laboratory of Chemo/Biosensing, The Key Laboratory of Functional Molecular Solids, Ministry of Education, Anhui Laboratory of Molecule-based MaterialsAnhui Normal UniversityWuhuPeople’s Republic of China
  2. 2.School of Pharmaceutical SciencesGannan Medical UniversityGanzhouPeople’s Republic of China

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