Abstract
In a new method for the determination of trace levels of chlorophenols in river waters, detection via surface-enhanced Raman scattering (SERS) is combined with recognition by a molecularly imprinted polymer (MIP). Nanoparticles of type Cu2O@Ag were synthesized by attaching silver particles to the surface of Cu2O nanoparticles. The Cu2O@Ag were then coated with a layer of a MIP that was obtained by atom transfer radical polymerization using from methacrylic acid as monomers and 2,6-dichlorophenol as the template. The morphology of Cu2O is found to be flower-like. The Cu2O@Ag-MIPs displays a strong SERS effect. Following removal of the template by rinsing with the mixture solution of methanol/acetic acid (9/1, v/v), the material was used to selectively bind 2,6-dichlorophenol, 2,4-dichlorophenol and 2,4-dichlorophenol. The SERS peak intensity at 1580 cm−1 increases linearly with the concentration of the various chlorophenols in the range from 10 nM to 1 mM, and the detection limit is 5.8 nM. The imprinting factor is 4.62. The method was applied to the analysis of (spiked) river water, with recoveries ranging from 91.8 to 115.4% and relative standard deviations of <4.5%.
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Acknowledgements
This work is supported by the National Natural Science Foundation (No. 21576112), Natural Science Foundation Project of Jilin Province (20180623042TC, 20180101181JC, 20170520147JH). The Project of Department of Science & Technology of Jilin Province (20180623042TC, 20170520134JH), the Project of Education Department of Jilin Province (JJKH20191010KJ) and the Project of Human Resources and Social Security Department of Jilin Province (2017956).
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Li, Y., Wang, Y., Wang, M. et al. A molecularly imprinted nanoprobe incorporating Cu2O@Ag nanoparticles with different morphologies for selective SERS based detection of chlorophenols. Microchim Acta 187, 59 (2020). https://doi.org/10.1007/s00604-019-4052-y
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DOI: https://doi.org/10.1007/s00604-019-4052-y