Anal Chem 90(21):13044–13050įu X, Lv R, Su J, Li H, Liu X (2018) A dual-emission nano-rod MOF equipped with carbon dots for visual detection of doxycycline and sensitive sensing of MnO 4. Ye Z, Weng R, Ma Y, Wang F, Liu H, Wei L, Xiao L (2018) Label-free single-particle colorimetric detection of permanganate by core-shell nanoparticle with dark-field optical microscopy. Jiang XH, Qin DM, Mo GC, Feng JS, Zheng XF, Deng BY (2019) Facile preparation of boron and nitrogen codoped green emission carbon quantum dots for detection of permanganate and captopril. N-CD fluorescent probes were facile prepared from biomass Auricularia auricula Underw for the sensing of MnO 4 − based on IFE. The synthesized N-CDs offering trace MnO 4 − detection in simulation sample are extremely profound for environmental evaluation. The proposed method was then used to measure MnO 4 − in polluted water with recoveries of 99.42 to 101.16%. The fluorescence quenching intensity of the system showed a good linear relationship with the concentration of MnO 4 − from 0.15 to 9.00 μM, and the limit of detection (LOD) of MnO 4 − was 0.12 μM. The inner filter effect (IFE) was formed between N-CDs and MnO 4 −, which led to the fluorescence quenching of N-CDs. There was considerable overlap between the excitation or emission spectrum of N-CDs and the UV absorption band of MnO 4 −. The optimal excitation and emission wavelengths were 324 nm and 400 nm, respectively. The N-CDs were spherical with an average particle size of 2.85 nm. Nitrogen-doped carbon dots (N-CDs) were prepared from A uricularia auricula (L.ex Hook.) Underw via a one-step hydrothermal method.
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