研究目的
To develop a robust and accurate chemical sensor for dissolved iron based on highly fluorescent graphene quantum dots (GQDs) embedded in a hydrogel matrix.
研究成果
The GQD-pHEMA hydrogel sensor developed in this study offers a rapid, selective, and linear response to dissolved Fe(III) in water, with potential applications in field analysis of water quality. The use of confocal microscopy for characterising the GQD distribution within the hydrogel represents a novel aspect of this work.
研究不足
The study primarily focused on the sensing of Fe(III) and demonstrated selectivity over other ions, but the response to other potential interferents in complex water samples was not extensively explored. Additionally, the practical deployment of the sensor in field conditions requires further optimization.
1：Experimental Design and Method Selection:
The study involved the construction of a GQD embedded hydrogel for sensing dissolved Fe(III). The hydrogel was made from poly(2-hydroxyethyl methacrylate) (pHEMA) and crosslinked by ethylene glycol dimethacrylate.
2：Sample Selection and Data Sources:
GQDs were prepared through the pyrolysis of citric acid. The hydrogel was fabricated using a GQD concentration of
3：81 mg GQD per mL of monomer solution. List of Experimental Equipment and Materials:
The materials used included GQDs, pHEMA, ethylene glycol dimethacrylate, and FeCl3 for testing.
4：Experimental Procedures and Operational Workflow:
The GQD-pHEMA hydrogels were prepared by polymerising the GQD/HEMA monomer solution. The fluorescence properties of the hydrogels were characterised, including by confocal microscopy.
5：Data Analysis Methods:
The response of the GQD-pHEMA hydrogels to Fe(III) was measured by fluorescence quenching, with data analysed for linear response and selectivity.
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