期刊
ANALYTICAL CHEMISTRY
卷 91, 期 6, 页码 4116-4123出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.analchem.8b05791
关键词
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资金
- National Key RD Plan [2017YFC1700806]
- National Natural Science Foundation of China [31671950]
- Shanghai City Sci-Tech Joint Research Project in Yangtze River Delta of Shanghai Municipal Science and Technology Commission [18395810100]
- Science and Technology Innovation Action Plan Project of Shanghai Municipal Commission of Science and Technology [17391901200]
An innovative approach based on a surface functional monomer-directing strategy for the construction of a sensitive and selective molecularly imprinted electrochemical sensor for patulin recognition is described. A patulin imprinted platinum nanoparticle (PtNP)-coated poly(thionine) film was grown on a preformed thionine tailed surface of PtNP-nitrogen-doped graphene (NGE) by electro-polymerization, which provided high capacity and fast kinetics to uptake patulin molecules. Thionine acted not only as a functional monomer for molecularly imprinted polymer (MIP), but also as a signal indicator. Enhanced sensitivity was obtained by combining the excellent electric conductivity of PtNPs, NGE, and thionine with multisignal amplification. The designed sensor displayed excellent performance for patulin detection over the range of 0.002-2 ng mL(-1) (R-2 = 0.995) with a detection limit of 0.001 ng mL(-1) for patulin. In addition, the resulting sensor showed good stability and high repeatability and selectivity. Furthermore, the feasibility of its applications has also been demonstrated in the analysis of real samples, providing novel tactics for the rational design of MIP-based electrochemical sensors to detect a growing number of deleterious substances.
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