Journal
RSC ADVANCES
Volume 7, Issue 27, Pages 16423-16427Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ra00307b
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Funding
- National Natural Science Foundation of China (NNSFC) [21171161, 21671186]
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A sensitive fluorescent nanosensor based on MnO2 quenching fluorescent carbon quantum dots was facilely developed by MnO2 in situ formed in the pores of C-dots/ZIF-8 hybrid nanocomposite. The Cdots/ZIF-8 hybrid nanocomposite was synthesized via a rapid method within 5 min at room temperature. Then, the MnO2 was directly incorporated into the ZIF-8 framework via redox reaction between the Cdots/ZIF-8 hybrid nanocomposite and KMnO4. The resulting fluorescent nanosensor exhibited a relatively uniform particle size of about 100 nm, good water-dispersibility and a highly selective fluorescence response toward ascorbic acid with a detection limit as low as 83 nM and a linear range of 0.5-8 mu M.
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