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Hydroxylated graphene quantum dots as fluorescent probes for sensitive detection of metal ions

  • Qiang Ge
  • Wen-hui Kong
  • Xin-qian Liu
  • Ying-min Wang
  • Li-feng Wang
  • Ning Ma
  • Yan LiEmail author
Article
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Abstract

Highly sensitive methods are important for monitoring the concentration of metal ions in industrial wastewater. Here, we developed a new probe for the determination of metal ions by fluorescence quenching. The probe consists of hydroxylated graphene quantum dots (H-GQDs), prepared from GQDs by electrochemical method followed by surface hydroxylation. It is a non-reactive indicator with high sensitivity and detection limits of 0.01 μM for Cu2+, 0.005 μM for Al3+, 0.04 μM for Fe3+, and 0.02 μM for Cr3+. In addition, the low biotoxicity and excellent solubility of H-GQDs make them promising for application in wastewater metal ion detection.

Keywords

graphene quantum dots surface hydroxylation metal ions detection fluorescent probes 

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Notes

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (No. 21674011) and Beijing Municipal Natural Science Foundation (No. 2172040).

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Copyright information

© University of Science and Technology Beijing and Springer-Verlag GmbH Germany, part of Springer Nature 2020

Authors and Affiliations

  • Qiang Ge
    • 1
  • Wen-hui Kong
    • 1
  • Xin-qian Liu
    • 1
  • Ying-min Wang
    • 1
  • Li-feng Wang
    • 1
  • Ning Ma
    • 2
  • Yan Li
    • 1
    Email author
  1. 1.Department of Inorganic Nonmetallic Material, School of Materials Science and EngineeringUniversity of Science and Technology BeijingBeijingChina
  2. 2.College of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbinChina

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