Journal
RSC ADVANCES
Volume 6, Issue 72, Pages 67481-67487Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra12986b
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Funding
- National Natural Science Foundation of China [21374078, 51303132]
- Tianjin Research Program of Application Foundation and Advanced Technology [15JCYBJC18100, 15JCTPJC59200]
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A simple method was designed for detecting cobalt ions (Co2+) based on the analyte-induced fluorescence quenching of carbon dots (CDs). CDs with a quantum yield of 38.7% were synthesized by hydrothermal treatment of Carbopol 934 and diethylenetriamine. Through the metal-ligand interaction, the prepared CDs can allow highly sensitive and selective detection of Co2+. The color change (from transparent to brown) of the solution can be clearly seen with the naked eye. This effective sensing platform shows high sensitivity and selectivity towards Co2+. Moreover, the CDs are also successfully utilized for monitoring the Co2+ content of natural water.
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