A hydrothermal route for synthesizing highly luminescent sulfur- and nitrogen-co-doped carbon dots as nanosensors for Hg 2

Carbon dots have attracted tremendous attention due to their excellent properties, such as outstanding photoluminescence, low cytotoxicity, and superior biocompatibility. In this work, a simple and low cost method was developed to synthesize sulfur- and nitrogen-co-doped carbon dots (S/N-CDs) via hy...

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Bibliographic Details
Published in:RSC advances 2016, Vol.6 (89), p.86436-86442
Main Authors: Wang, Chunfeng, Sun, Dong, Chen, Yujuan, Zhuo, Kelei
Format: Article
Language:English
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Summary:Carbon dots have attracted tremendous attention due to their excellent properties, such as outstanding photoluminescence, low cytotoxicity, and superior biocompatibility. In this work, a simple and low cost method was developed to synthesize sulfur- and nitrogen-co-doped carbon dots (S/N-CDs) via hydrothermal treatment of pyritinol hydrochloride in the presence of graphene oxide (GO). The S/N-CDs displayed good water solubility, high luminescence stability, excitation-dependent emission, up-conversion photoluminescence, and strong photoluminescence with a quantum yield of ca. 32.2% without complicated surface modifications. In addition, the prepared S/N-CDs were used as a sensitive probe to detect Hg 2+ ions, showing an excellent selectivity and wide linear range. Particularly, the detection limit could reach as low as 1.0 nM.
ISSN:2046-2069
2046-2069
DOI:10.1039/C6RA16357B