São Carlos Institute of Physics, University of São Paulo, Av. Trabalhador São-carlense, 400, 13566-590, São Carlos, SP, Brazil.
São Carlos Institute of Physics, University of São Paulo, Av. Trabalhador São-carlense, 400, 13566-590, São Carlos, SP, Brazil.
J Colloid Interface Sci. 2018 Apr 1;515:101-108. doi: 10.1016/j.jcis.2017.12.085. Epub 2017 Dec 30.
A green approach for the preparation of carbon black (CB) and electrochemically reduced graphene oxide composite (ERGO) is described based on screen printed carbon electrodes (SPCEs) fabricated on poly(ethylene terephthalate) (PET) as electrochemical sensors. This approach leads to a heterogeneous hydrophilic surface with high concentration of defect sites according to scanning electron microscopy, contact angle and Raman spectroscopy measurements. The SPCE/CB-ERGO sensor was tested with dopamine (DA), epinephrine (EP) and paracetamol (PCM), exhibiting an enhanced electrocatalytic performance compared to the bare SPCE. It displayed a wider linear range, lower limit of detection and a remarkably higher analytical sensitivity, viz. 1.5, 0.13 and 0.028 A L mol for DA, EP and PCM, respectively, being also capable of simultaneous determination of the three analytes. Such high performance is demonstration that SPCE/CB-ERGO may serve as generic platform for cost-effective flexible electrochemical sensors.
本文描述了一种基于在聚对苯二甲酸乙二醇酯（PET）上制备的丝网印刷碳电极（SPCE）的绿色方法，用于制备碳黑（CB）和电化学还原氧化石墨烯复合材料（ERGO），并将其用作电化学传感器。根据扫描电子显微镜、接触角和拉曼光谱测量，这种方法会导致具有高缺陷浓度的不均匀亲水表面。SPCE/CB-ERGO 传感器用于测试多巴胺（DA）、肾上腺素（EP）和扑热息痛（PCM），与裸 SPCE 相比，表现出增强的电催化性能。它显示出更宽的线性范围、更低的检测限和更高的分析灵敏度，分别为 1.5、0.13 和 0.028 A L mol 用于 DA、EP 和 PCM，并且能够同时测定这三种分析物。这种高性能表明 SPCE/CB-ERGO 可以作为用于具有成本效益的灵活电化学传感器的通用平台。
