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Journal of Materials Science

, Volume 53, Issue 14, pp 10523–10533 | Cite as

A highly selective and sensitive colorimetric Hg2+ sensor based on hemicyanine-functionalized polyacrylonitrile fiber

  • Yali Zhao
  • Xiaoli Xing
  • Runjiao Gao
  • Minli Tao
  • Wenqin Zhang
Polymers
  • 137 Downloads

Abstract

In this work, we have synthesized a novel hemicyanine-modified polyacrylonitrile fiber (HDBA-PANAF) as a colorimetric Hg2+ sensor. The color is observed from dark red to orange by the naked eye only when the fiber is exposed to Hg2+. Positively, the HDBA-PANAF shows high selectivity and sensitivity for Hg2+ compared with other metal ions such as Na+, Mg2+, Al3+, Ca2+, Cr3+, Mn2+, Co2+, Ni2+, Cu2+, Zn2+, Ag+, Cd2+ and Pb2+. Furthermore, the obtained fiber has a wide pH application range from 3 to 11 and also processes a lower detection limit of 1 × 10−6 mol L−1 for Hg2+. Moreover, the HDBA-PANAF undergoes an obvious color change toward Hg2+ even containing an excess of ethylenediaminetetraacetic acid disodium salt (EDTA-2Na) in the solution, indicating that the fiber has a stronger complexation affinity for Hg2+ than EDTA-2Na. Hence, the fiber sensor possesses the merits of low cost, high selectivity, low detection limit and environment-friendly property, which shows that it is a promising candidate for Hg2+ detection in water.

Notes

Acknowledgements

The authors are thankful for the financial support from National Natural Science Foundation of China (Nos.: 21777111 and 21572156).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

10853_2018_2304_MOESM1_ESM.doc (7.9 mb)
Supplementary material 1 (DOC 8100 kb)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • Yali Zhao
    • 1
  • Xiaoli Xing
    • 1
  • Runjiao Gao
    • 1
  • Minli Tao
    • 1
    • 2
  • Wenqin Zhang
    • 1
    • 2
  1. 1.Department of Chemistry, School of ScienceTianjin UniversityTianjinChina
  2. 2.Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)TianjinChina

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