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Synthesis of the Cu-Doped Dual-Emission Fluorescent Carbon Dots and Its Analytical Application
journal contribution
posted on 2018-07-29, 00:00 authored by Pan-pan Zhu, Zhen Cheng, Ling-ling Du, Qian Chen, Ke-jun TanNew
Cu-doped dual-emission carbon dots (D-CDs) were synthesized
rapidly and simply via a one-pot solvothermal method, and its special
photoluminescence mechanism was studied. D-CDs have two fluorescence
(FL) emission peaks under one-wavelength excitation and can be used
as dual-signal sensor which is usually designed with two or more substances.
The prepared CDs show excellent water solubility, photostability,
salt tolerance, oxidation resistance, and special optical properties.
The raw material ratio, solvent, pH, time, and synthesis temperature
were optimized. The characterizations of CDs including transmission
electron microscopy, X-ray photoelectron spectroscopy, inductively
coupled plasma spectroscopic analysis, X-ray diffraction assignation
of phases, thermogravimetric analysis and differential scanning calorimetry,
Fourier transform infrared (FTIR) spectroscopy, FL spectrum, and ultraviolet–visible
spectrum (UV–vis) were conducted. The investigation on mechanism
indicates that the unique dual-emissive property is mainly caused
by the energy-level gaps generated by the surface defects of CDs.
The prepared D-CDs have good potential in dual-signal analysis and
visualization sensing. To demonstrate the practical application, ferric
ions, vitamin A acetate, and pH have been determined successfully.
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thermogravimetric analysisplasma spectroscopic analysisFTIRCu-Doped Dual-Emissiondual-signal analysisenergy-level gapsCarbon Dotsone-wavelength excitationwater solubilityCDs showD-CDX-ray diffraction assignationferric ionsUVoxidation resistancescanning calorimetrypHdual-signal sensorone-pot solvothermal methodmaterial ratiotransmission electron microscopyphotoluminescence mechanismAnalytical Application New Cu-doped dual-emission carbon dotssalt toleranceFL spectrumsurface defectsemission peaksX-ray photoelectron spectroscopysynthesis temperaturedual-emissive property
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