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Bifunctional Nanoparticles as a Recyclable Fluorescent Sensor for pH and Cu $^{2 +}$ Detection and Removal of Heavy Metal Ions

Institutes of Physical Science and Information Technology, Anhui University, Hefei, Anhui 230601, P. R. China

The Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei, Anhui 230031, P. R. China

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Xiangfu Meng

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Hongji Liu

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Xingyu Wang

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, and

Hui Wang

http://orcid.org/0000-0002-0847-3887

E-mail Address: hw39@hmfl.ac.cn

Corresponding author.

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https://doi.org/10.1142/S1793292020500484Cited by:4 (Source: Crossref)

Abstract

Magnetic and fluorescent-based sensors have demonstrated widely applications due to their easily recycle and quickly optical response. However, the complex synthesis and weaker function of these sensors limit their practical applications. Herein, an unmodified, magnetic-functionalized carbon dots-based fluorescent sensor has been developed for label-free detection of pH and Cu $^{2 +}$ with high sensitivity. The sensors can not only reversibly quench and recover the fluorescence signals in response to the variation of surrounding environment including pH and Cu $^{2 +}$ , but also be used as a high-efficiency recyclable adsorbent for removing Cu $^{2 +}$ , Hg $^{2 +}$ , Cr $^{3 +}$ and Pb $^{2 +}$ from aqueous solution.

Keywords:

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