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MnO₂in situ formed into the pores of C-dots/ZIF-8 hybrid nanocomposites as an effective quencher for fluorescence sensing ascorbic acid

Author:
Li, Guangming, Lv, Nan, Zhang, Jilin, Ni, Jiazuan
Source:
RSC advances 2017 v.7 no.27 pp. 16423-16427
ISSN:
2046-2069
Subject:
ambient temperature, ascorbic acid, biosensors, carbon quantum dots, detection limit, fluorescence, manganese dioxide, nanocomposites, particle size, potassium permanganate, rapid methods, redox reactions
Abstract:
A sensitive fluorescent nanosensor based on MnO₂ quenching fluorescent carbon quantum dots was facilely developed by MnO₂in situ formed in the pores of C-dots/ZIF-8 hybrid nanocomposite. The C-dots/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 C-dots/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 μM.
Agid:
6415427