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Electrochemical sensor based on molecularly imprinted composite membrane of poly(o-aminothiophenol) with gold nanoparticles for sensitive determination of herbicide simazine in environmental samples
Jin Zhang;  Chaoying Wang;  Yanhui Niu;  Shijie Li;  Rongqin Luo
2017
Source PublicationSensors and Actuators B: Chemical
Volume249Pages:747-755
Abstract

A novel electrochemical sensor based on molecularly imprinted polymer membranes (MIPM) as biomimetic molecular recognition element involved in o-aminothiophenol functionalized Au nanoparticles (ATP@AuNPs) modified gold electrode was constructed for sensitive and selective detection of herbicide simazine (SMZ). The nano-scaled MIPM, with high specific surface area, was prepared by self assembly of o-aminothiophenol (ATP) and electrodeposition of ATP@AuNPs in the presence of template SMZ. Cathodic current of SMZ was measured by cyclic voltammetry and the results exhibited that the proposed sensor possess a high electrocatalytic activity at a negative potential and a fast rebinding dynamics towards the reduction of SMZ in 0.01 M H2SO4 solution (pH 1.7). Linear dependency of peak current on SMZ concentrations was observed from 0.03 to 140 M and detection limit was estimated to be 0.013 (3S/N). The enhancement of sensitivity was attributed to the presence of gold nanoparticles (AuNPs) which decreased the electron-transfer impedance and increased imprinting sites, lead to the superior enrichment effect of the trace amount of SMZ in aqueous solvent. The developed SMZ imprinted sensor exhibited excellent long-term stability and acceptable repeatability. In addition, the proposed method was successfully applied to measure SMZ in several real samples with the spiked recoveries changing from 91.4% to 96.8%, showing a promising potential in practical application.

KeywordMolecular Imprinting electrochemical Sensor gold Nanoparticles herbicide Simazine o-aminothiophenol
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.gyig.ac.cn/handle/42920512-1/8099
Collection环境地球化学国家重点实验室
Affiliation1.School of Chemistry and Life Science, Guizhou Normal College, Guiyang 550018, PR China
2.State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, PR China
Recommended Citation
GB/T 7714
Jin Zhang;Chaoying Wang;Yanhui Niu;Shijie Li;Rongqin Luo. Electrochemical sensor based on molecularly imprinted composite membrane of poly(o-aminothiophenol) with gold nanoparticles for sensitive determination of herbicide simazine in environmental samples[J]. Sensors and Actuators B: Chemical,2017,249:747-755.
APA Jin Zhang;Chaoying Wang;Yanhui Niu;Shijie Li;Rongqin Luo.(2017).Electrochemical sensor based on molecularly imprinted composite membrane of poly(o-aminothiophenol) with gold nanoparticles for sensitive determination of herbicide simazine in environmental samples.Sensors and Actuators B: Chemical,249,747-755.
MLA Jin Zhang;Chaoying Wang;Yanhui Niu;Shijie Li;Rongqin Luo."Electrochemical sensor based on molecularly imprinted composite membrane of poly(o-aminothiophenol) with gold nanoparticles for sensitive determination of herbicide simazine in environmental samples".Sensors and Actuators B: Chemical 249(2017):747-755.
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