研究目的
Developing an eco-friendly fluorescent molecularly imprinted polymer anchored on graphene quantum dots for the sensitive and selective detection of p-nitroaniline in environmental and biological samples.
研究成果
The developed GQDs@MIP provides a sensitive, selective, and eco-friendly method for the detection of p-NA in complex samples. The method has potential applications in environmental monitoring and food safety.
研究不足
The study did not explore the long-term stability of the GQDs@MIP under various environmental conditions. The method's applicability to other pollutants was not investigated.
1:Experimental Design and Method Selection:
The study involved the synthesis of GQDs via a one-pot hydrothermal method and the subsequent coating of an MIP layer on the GQDs using sol–gel polymerization. The GQDs@MIP was characterized using various spectroscopic and microscopic techniques.
2:Sample Selection and Data Sources:
The study utilized p-NA as the template molecule for the MIP synthesis. Real samples included water and fish samples spiked with p-NA.
3:List of Experimental Equipment and Materials:
Equipment included a Fourier-transform infrared spectrophotometer, fluorescence spectrometer, scanning electron microscope, transmission electron microscope, and ultraviolet spectrophotometer. Materials included citric acid, urea, 3-aminopropyl triethoxysilane, tetraethylorthosilicate, and p-nitroaniline.
4:Experimental Procedures and Operational Workflow:
The GQDs were synthesized and then coated with an MIP layer. The fluorescence quenching efficiency of the GQDs@MIP was evaluated in the presence of p-NA. The method was applied to real samples for p-NA detection.
5:Data Analysis Methods:
The fluorescence quenching data were analyzed using the Stern–Volmer equation to determine the detection limit and imprinting factor.
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Fourier-transform infrared spectrophotometer
IRAffinity-1
Shimadzu
Characterization of the GQDs@MIP
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Fluorescence spectrometer
F-7000
Hitachi
Measurement of fluorescence intensity
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Scanning electron microscope
Zeiss-Sigma HD
Zeiss
Morphological characterization of the polymer
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Transmission electron microscope
FEI Tecnai G2 F20
FEI
Morphological characterization of the polymer
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Ultraviolet spectrophotometer
Characterization of the GQDs@MIP
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