Molecularly imprinted electrochemical sensor based on amine group modified graphene covalently linked electrode for 4-nonylphenol detection.
In this work, an imprinted electrochemical sensor based on electrochemical reduced graphene covalently modified carbon electrode was developed for the determination of 4-nonylphenol (NP). An amine-terminated functional graphene oxide was covalently modified onto the electrode surface with diazonium salt reactions to improve the stability and reproducibility of the imprinted sensor. The electrochemical properties of each modified electrodes were investigated with differential pulse voltammetry (DPV). The electrochemical characteristic of the imprinted sensor was also investigated using electrochemical impedance spectroscopy (EIS) in detail. The response currents of the imprinted electrode exhibited a linear relationship toward 4-nonylphenol concentration ranging from 1.0 × 10(-11) to 1.0 × 10(-8) gm L(-1) with the detection limit of 3.5 × 10(-12) gm L(-1) (S/N=3). The fabricated electrochemical imprinted sensor was successfully applied to the detection of 4-nonylphenol in rain and lake water samples.
Key laboratory of Hunan Forest Products and Chemical Industry Engineering, Jishou University, Hunan 427000, PR China; College of Chemistry and Chemical Engineering, Jishou University, Hunan 416000, PR China.
Hong-Jun
HJ
Chen
Zhao-Hui
ZH
Zhang
Rong
R
Cai
Xing
X
Chen
Yu-Nan
YN
Liu
Wei
W
Rao
Shou-Zhuo
SZ
Yao
D003979:Diazonium Compounds / Q000737:chemistry; D055664:Electrochemical Techniques; D004566:Electrodes; D005618:Fresh Water / Q000737:chemistry*; D006108:Graphite / Q000737:chemistry*; D057230:Limit of Detection; D054802:Molecular Imprinting; D010087:Oxides; D010636:Phenols / Q000302:isolation & purification*; D015203:Reproducibility of Results; D014874:Water Pollutants, Chemical / Q000302:isolation & purification*
D003979:Diazonium Compounds; D010087:Oxides; D010636:Phenols; D014874:Water Pollutants, Chemical; D006108:Graphite; C041594:4-nonylphenol
4-Nonylphenol; 4-nonylphenol; CE; DCC; DPV; EIS; Electrochemical sensor; FT-IR; Fourier transform infrared spectroscopy; GO; GO-NH(2); GP; Graphene; MIPs; Molecularly imprinted; N, N′-dicyclohexylcarbodiimide; N-hydroxysuccinimide; NHS; NP; NP-2; OP; PPy; RSD; amide group terminated graphene oxide; carbon electrode; differential pulse voltammetry; electrochemical impedance spectroscopy; graphene; graphene oxide; molecularly imprinted polymers; octylphenol; polyoxyethylene(2) nonylphenyl ether; pyrrole polymer; recovery standard deviation