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Facile synthesis of nitrogen and sulfur co-doped carbon dots for multiple sensing capacities: alkaline fluorescence enhancement effect, temperature sensing, and selective detection of Fe3+ ions

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Abstract

In this work, we prepared nitrogen and sulfur co-doped carbon dots (C-dots) via a one-pot facile hydrothermal method using methionine and ethylenediamine as the precursors. TEM, HRTEM, FTIR and XPS were used to characterize the morphology and surface molecular structures of the N,S co-doped C-dots. The obtained C-dots showed good aqueous solubility and attractive fluorescence properties. The C-dots responded rapidly towards Fe3+ ions, and could be used as a fluorescent probe for Fe3+ ion detection. In addition, the C-dots also exhibited temperature- and pH-sensitive properties, possessing good temperature recoverability and significantly enhanced fluorescence under alkaline conditions. These excellent characteristics promise extensive potential applications for such C-dots in physiological and environmental monitoring.

Graphical abstract: Facile synthesis of nitrogen and sulfur co-doped carbon dots for multiple sensing capacities: alkaline fluorescence enhancement effect, temperature sensing, and selective detection of Fe3+ ions

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Publication details

The article was received on 28 Apr 2018, accepted on 22 Jun 2018 and first published on 23 Jun 2018


Article type: Paper
DOI: 10.1039/C8NJ02086H
Citation: New J. Chem., 2018, Advance Article
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    Facile synthesis of nitrogen and sulfur co-doped carbon dots for multiple sensing capacities: alkaline fluorescence enhancement effect, temperature sensing, and selective detection of Fe3+ ions

    G. Liu, S. Li, M. Cheng, L. Zhao, B. Zhang, Y. Gao, Y. Xu, F. Liu and G. Lu, New J. Chem., 2018, Advance Article , DOI: 10.1039/C8NJ02086H

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