期刊
RSC ADVANCES
卷 9, 期 71, 页码 41383-41391出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9ra08726e
关键词
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资金
- National Natural Science Foundation of China [21767011, 21565014]
- Innovation Fund Designated for Graduate Students of Jishou University [JDY21]
- National Experimental Teaching Demonstration Center of Chemistry of Jishou University [2018ZXCX25]
- JSU MnZn V Collaborative Innovation Center Graduate Research Innovation [2018mzvg003]
An eco-friendly fluorescent molecularly imprinted polymer anchored on the surface of graphene quantum dots (GQDs@MIP) was developed with an efficient sol-gel polymerization for highly sensitive and selective determination of p-nitroaniline (p-NA). The GQDs@MIP was characterized in detail by Fourier-transform infrared, fluorescence spectrometer, scanning electron microscope, transmission electron microscope and ultraviolet spectrophotometer. The results showed that the imprinted layer was successfully grafted on the surface of the GQDs. The fluorescence of the GQDs@MIP is efficiently quenched when p-NA recombines with the imprinting sites based on the photo-induced electron transfer fluorescence quenching mechanism. A good linear relationship was obtained between the fluorescence quenching efficiency of the GQDs@MIP and the concentration of p-NA in the range of 0-15.0 mu M with a correlation coefficient of 0.99. The practicability of the proposed method in real samples was successfully evaluated through monitoring p-NA in water and fish samples with satisfactory recovery. The developed method provides a feasible and eco-friendly strategy to fabricate MIPs anchored on GQDs with good fluorescence properties for sensitive detection of organic pollutants in complex samples.
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