Journal
NANOSCALE
Volume 6, Issue 8, Pages 4157-4162Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c3nr06744k
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Funding
- National Natural Science Foundation of China [21225730, 91326202, 21207136, 21272236]
- Ministry of Science and Technology of China [2011CB933700]
- Priority Academic Program Development of Jiangsu Higher Education Institutions
- Hefei Center for Physical Science and Technology [2012FXZY005]
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A simple and green route was developed for the first time to produce fluorescent graphitic carbon nitride (Fg-C3N4) by hydrothermal treatment of bulk g-C3N4. The produced F-g-C3N4 dots have blue emission and a high quantum yield, and were applied as a very effective fluorescent probe for label-free selective and sensitive detection of Cu2+ and Fe3+ ions; the limits of detection were as low as 0.5 nM and 1.0 nM, respectively. By using sodium hexametaphosphate (SHPP) as a masking agent of Fe3+, Cu2+ was exclusively detected in the presence of Fe3+ ions. Cu2+ and Fe3+ ions in real water samples were also detected successfully. This exceptional fluorescent performance makes the probes based on F-g-C3N4 dots attractive for highly sensitive detection of Cu2+ and Fe3+ ions in real water.
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