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Purification of Nitrogen doped graphene quantum dots via liquid-liquid extraction system of tetrahydrofuran-(NH4)2SO4-Water and its application to sensitive iron (III) ions determination

Abstract

Abstract A facile, rapid method based on liquid-liquid extraction system for the purification of graphene quantum dots is reported in this work. Nitrogen-doped graphene quantum dots (N-GQDs) were synthesized by a simple hydrothermal route for cutting graphene oxide sheets. Then, through liquid-liquid extraction system of Tetrahydrofuran-(NH4)2SO4-Water, N-GQDs have been successfully purified. The as-prepared N-GQDs have an average size of 6 nm and exhibit optimum excitation and emission wavelengths at 330 and 435 nm, respectively. N-GQDs were demonstrated as a sensitive fluorescent sensing probe for Fe3+. The sensor can detect Fe3+ (R2 = 0.992) in the concentration range of 0.2-30 μM, with its limitation of detection of 0.06 μM. This method of quantitative analysis of Fe3+ performs good linearity and reliable reproducibility.

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Publication details

The article was received on 28 Jul 2017, accepted on 10 Sep 2017 and first published on 11 Sep 2017


Article type: Paper
DOI: 10.1039/C7AY01841J
Citation: Anal. Methods, 2017, Accepted Manuscript
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    Purification of Nitrogen doped graphene quantum dots via liquid-liquid extraction system of tetrahydrofuran-(NH4)2SO4-Water and its application to sensitive iron (III) ions determination

    W. Zhang, S. Kang. Tang, S. P. Zhang and Y. Chen, Anal. Methods, 2017, Accepted Manuscript , DOI: 10.1039/C7AY01841J

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