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 Li

doi:10.1007/s12613-019-1908-4

Volume 27 Issue 1

Jan. 2020

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2020 > 27(1): 91-99

Qiang Ge, Wen-hui Kong, Xin-qian Liu, Ying-min Wang, Li-feng Wang, Ning Ma, and Yan Li, Hydroxylated graphene quantum dots as fluorescent probes for sensitive detection of metal ions, Int. J. Miner. Metall. Mater., 27(2020), No. 1, pp. 91-99. https://doi.org/10.1007/s12613-019-1908-4

Cite this article as:

Qiang Ge, Wen-hui Kong, Xin-qian Liu, Ying-min Wang, Li-feng Wang, Ning Ma, and Yan Li, Hydroxylated graphene quantum dots as fluorescent probes for sensitive detection of metal ions, Int. J. Miner. Metall. Mater., 27(2020), No. 1, pp. 91-99. https://doi.org/10.1007/s12613-019-1908-4

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Research Article

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

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Corresponding author:
Yan Li E-mail: liyan2011@ustb.edu.cn
Received: 29 May 2019; Revised: 1 August 2019; Accepted: 16 August 2019; Available online: 29 October 2019

Abstract

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.
- graphene quantum dots;
- surface hydroxylation;
- metal ions detection;
- fluorescent probes

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