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Reference type: Journal
Authors: Li XJ, Wang XJ, Li LL, Duan HM, Luo CN
Article Title: Electrochemical sensor based on magnetic graphene oxide@gold nanoparticles-molecular imprinted polymers for determination of dibutyl phthalate.
Publication date: 2015
Journal: Talanta
Volume: 131
Page numbers: 354-360.
DOI: 10.1016/j.talanta.2014.07.028
Alternative URL: http://www.sciencedirect.com/science/article/pii/S0039914014005840

Abstract: A novel composite of magnetic graphene oxide @ gold nanoparticles-molecular imprinted polymers (MGO@AuNPs-MIPs) was synthesized and applied as a molecular recognition element to construct dibutyl phthalate (DBP) electrochemical sensor. The composite of MGO@AuNPs was first synthesized using coprecipitation and self-assembly technique. Then the template molecules (DBP) were absorbed at the MGO@AuNPs surface due to their excellent affinity, and subsequently, selective copolymerization of methacrylic acid and ethylene glycol dimethacrylate was further achieved at the MGO@AuNPs surface. Potential scanning was presented to extract DBP molecules from the imprinted polymers film rapidly and completely. As a consequence, an electrochemical sensor for highly sensitive and selective detection of DBP was successfully constructed as demonstration based on the synthesized MGO@AuNPs-MIPs composite. Under optimal experimental conditions, selective detection of DBP in a linear concentration range of 2.5 x 10-9 - 5.0 x 10-6 mol/L was obtained. The new DBP electrochemical sensor also exhibited excellent repeatability, which expressed as relative standard deviation (RSD) was about 2.50% for 30 repeated analyses of 2.0 x 10-6 mol/L DBP
Template and target information: dibutyl phthalate, DBP
Author keywords: Molecularly imprinted polymers, magnetic graphene oxide, gold nanoparticles, Electrochemical sensor, Dibutyl phthalate


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