研究目的
To develop a facile and eco-friendly one-step hydrothermal synthesis of single-layered graphene quantum dots (sl-GQDs) for the detection of ferric ions (Fe3+) in aqueous solutions.
研究成果
The study successfully developed a simple and eco-friendly method for the synthesis of sl-GQDs with high specificity for Fe3+ detection. The sl-GQDs demonstrated excellent analytical performance and potential for real water sample analysis.
研究不足
The study does not explore the potential interference from other ions in complex matrices beyond the tested metallic ions. The scalability of the synthesis method for industrial applications is not discussed.
1：Experimental Design and Method Selection:
A one-step hydrothermal process was used to synthesize sl-GQDs with citric acid and β-cyclodextrin as starting materials.
2：Sample Selection and Data Sources:
Citric acid and β-cyclodextrin were used as precursors.
3：List of Experimental Equipment and Materials:
TECNAI F30 transmission electron microscopy (TEM), multimode 8 AFM, Nicolet 380 FT-IR spectrometer, inVia Raman spectrometer, Sigma probe X-ray photoelectron spectrometer (XPS), F-7000 FL spectrometer, UV-1800 spectrometer, AVANCШ400 nuclear magnetic resonance spectrometer, CHI 660D electrochemical workstation, STA 2500 Thermal Gravimetric Analyzer.
4：Experimental Procedures and Operational Workflow:
The mixture of citric acid and β-cyclodextrin was heated at 160℃ for 6 h in a Teflon-lined autoclave. The solution was then centrifuged to collect the supernatant containing sl-GQDs.
5：Data Analysis Methods:
The quantum yield was determined using quinine sulfate as a standard. The sensitivity and selectivity of sl-GQDs towards various metallic ions were evaluated.
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UV-1800 spectrometer
UV-1800
Shimadzu
UV-vis spectrometer for optical measurements
-
CHI 660D electrochemical workstation
660D
CH Instruments
Cyclic voltammetry for redox properties
-
TECNAI F30
F30
FEI
Transmission electron microscopy for morphological features
-
multimode 8 AFM
8
Bruker
Atomic force microscopy for morphological features
-
Nicolet 380 FT-IR spectrometer
380
Thermo
Fourier transform infrared spectroscopic characterization
-
Sigma probe X-ray photoelectron spectrometer
Sigma probe
Thermo
X-ray photoelectron spectroscopic characterization
-
F-7000 FL spectrometer
F-7000
Hitachi
Fluorescence spectrometer for optical measurements
-
inVia Raman spectrometer
inVia
Renishaw
Raman spectroscopic characterization
-
AVANCШ400 nuclear magnetic resonance spectrometer
AVANCШ400
Bruker Biospin
Nuclear magnetic resonance spectroscopy
-
STA 2500 Thermal Gravimetric Analyzer
2500
Netzsch
Thermogravimetric analysis
-
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