Molecularly Imprinted Polypyrrole on Glassy Carbon Electrode Modified with Reduced Graphene Oxide and Gold Nanoparticles for Isoamyl Alcohol Analysis in Fusel Oil

被引:7
作者
Mariano, Thiago M. [1 ]
Beluomini, Maisa A. [1 ]
Stradiotto, Nelson R. [1 ,2 ]
机构
[1] Univ Estadual Paulista Unesp, Inst Quim, BR-14800060 Araraquara, SP, Brazil
[2] Univ Estadual Paulista Unesp, Inst Pesquisa Bioenergia, BR-14800060 Araraquara, SP, Brazil
基金
巴西圣保罗研究基金会;
关键词
molecularly imprinted polypyrrole; reduced graphene oxide; gold nanoparticles; isoamyl alcohol; fusel oil; SENSOR; POLYMER; RECOGNITION; PERFORMANCE;
D O I
10.21577/0103-5053.20200174
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
A molecularly imprinted electrochemical sensor for determination of isoamyl alcohol was successfully constructed by modifying the glassy carbon electrode (GCE) with gold nanoparticles (AuNPs) and reduced graphene oxide (RGO). The modification of the GCE increased the electron transfer rate and the electrode surface area, which, consequently, made more room available for the formation of the molecularly imprinted polymer (MIP). The development of the MIP on the modified surface was carried out via electropolymerization of the pyrrole in acetate buffer solution in the presence of the target molecule. The MIP-AuNPs-RGO/GCE showed low limit of detection (8.4 x 10(-8) mol L-1), satisfactory quantification range, amperometric sensitivity of 1.1 A L mol(-1), excellent reproducibility and stability. Even when in the presence of analogous molecules, the sensor exhibited excellent selectivity. These results suggest that the proposed sensor is suitable for the detection of isoamyl alcohol in fusel oil samples.
引用
收藏
页码:249 / 259
页数:11
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