Issue 1, 2015

Facile synthesis of oxygen and sulfur co-doped graphitic carbon nitride fluorescent quantum dots and their application for mercury(ii) detection and bioimaging

Abstract

In this work, uniform oxygen and sulfur co-doped graphitic carbon nitride quantum dots (OS-GCNQDs) have been prepared by thermal treatment of citric acid and thiourea. The as-obtained OS-GCNQDs show strong blue photoluminescence (PL) with a relatively high quantum yield of 14.5%. Furthermore, OS-GCNQDs exhibit stable and specific concentration-dependent PL intensities in the presence of mercury(II) ions in the range of 0.001–20.0 μM, with a detection limit of 0.37 nM (3S/N). More importantly, OS-GCNQDs were explored for cell imaging with satisfactory biocompatibility, and so are a potential fluorescent probe in biosensing and bioimaging applications.

Graphical abstract: Facile synthesis of oxygen and sulfur co-doped graphitic carbon nitride fluorescent quantum dots and their application for mercury(ii) detection and bioimaging

Supplementary files

Article information

Article type
Paper
Submitted
19 Sep 2014
Accepted
28 Oct 2014
First published
28 Oct 2014

J. Mater. Chem. C, 2015,3, 73-78

Author version available

Facile synthesis of oxygen and sulfur co-doped graphitic carbon nitride fluorescent quantum dots and their application for mercury(II) detection and bioimaging

Y. Lu, J. Chen, A. Wang, N. Bao, J. Feng, W. Wang and L. Shao, J. Mater. Chem. C, 2015, 3, 73 DOI: 10.1039/C4TC02111H

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