Journal
RSC ADVANCES
Volume 4, Issue 96, Pages 54060-54065Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra10885j
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Funding
- National Natural Science Foundation of China [20973055, 21173070]
- Plan for Scientific Innovation Talent of Henan Province [124200510014]
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A simple and green approach to prepare water-soluble, nitrogen-, sulfur-, and phosphorus-co-doped carbon dots (N/S/P-CDs) by one step hydrothermal treatment of cucumber juice is reported. The resultant N/S/P-CDs possess a uniform morphology, a size of less than 10 nm, plentiful O and N functional groups as well as a limited amount of P and S functional groups, and exhibit good luminescence stability, high resistance to photobleaching, high solubility, and excitation-dependent emission behavior. It was also found that a higher reaction temperature favors the formation of N/S/P-CDs with smaller size and longer wavelength of photoluminescence emissions. Moreover, the N/S/P-CDs can be applied as a fluorescent probe for the detection of Hg2+ ions.
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