US EPA

2804043 

Journal Article 

Electrochemical sensor based on magnetic graphene oxide@gold nanoparticles-molecular imprinted polymers for determination of dibutyl phthalate 

Li, X; Wang, X; Li, L; Duan, H; Luo, C 

2015 

Yes 

Talanta
ISSN: 0039-9140
EISSN: 1873-3573 

Talanta. 2015, Jan; 131:354-60. [Talanta] 

131 

354-360 

English 

25281114 

10.1016/j.talanta.2014.07.028 

WOS:000343691000050 

http://www.sciencedirect.com/science/article/pii/S0039914014005840
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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 × 10(-9)-5.0 × 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 × 10(-6)mol/L DBP. 

Molecularly imprinted polymers; Magnetic graphene oxide; Gold nanoparticles; Electrochemical sensor; Dibutyl phthalate