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首页> 外文期刊>International Journal of Electrochemical Science >A Novel Sensor Based on Ag Nanoparticles Functionalized with Poly-Acid Chrome Blue K and Graphene for the Sensitive Determination of Diclofenac Sodium
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A Novel Sensor Based on Ag Nanoparticles Functionalized with Poly-Acid Chrome Blue K and Graphene for the Sensitive Determination of Diclofenac Sodium

机译：基于聚酸铬蓝钾和石墨烯官能化的基于Ag纳米颗粒的新型传感器，用于敏感的双氯芬酸钠

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摘要

Ag nanoparticles functionalized with poly-acid chrome blue K and graphene (Ag-poly-ACBK@Gr)were successfully fabricated on the surface of a glassy carbon electrode using layer-by-layerelectropolymerization. The surface structure of the synthesized modified glassy carbon electrode wascharacterized by scanning electron microscopy. The electrochemical behaviours of diclofenac sodium(DS) at the Ag-poly-ACBK@Gr-modified electrode were investigated by cyclic voltammetry anddifferential pulse voltammetry. It was found that the prepared sensor exhibited a cathodic peak at 0.78V with higher peak current response compared to the related modified electrodes. Under optimalconditions, the sensor for the determination of DS exhibits a good linear relationship between the peakcurrent and DS concentration in the range from 0.1 to 40 μM, and the equation is Ip(μA) = 7.23 ×103c(μM) + 3.46 × 10-2 (R = 0.9955) with the estimated limit of detection of 34.2 nM (S/N = 3). TheAg-poly-ACBK@Gr-modified glassy carbon electrode with high sensitivity and excellent stability andselectivity was successfully applied to detect DS in real drugs and human urine at the recoveriesranging from 99.60 to 101.84%.
机译：使用层逐逐层电聚合，在玻璃碳电极的表面上成功制造了用聚酸铬蓝k和石墨烯（Ag-Poly-acbk @ Gr）官能化的Ag纳米颗粒。通过扫描电子显微镜进行合成改性玻璃碳电极的表面结构。通过循环伏安法和变平脉冲伏安研究研究了双聚丙烯酸钠（DS）在Ag-Poly-ACBK @ GR改性电极的电化学行为。发现，与相关修饰的电极相比，制备的传感器在0.78V下表现出峰值电流响应的阴极峰值。在最佳条件下，用于测定DS的传感器在0.1至40μm的范围内显示出DS之间的良好线性关系，并且等式是IP（μA）= 7.23×103c（μm）+ 3.46×10- 2（r = 0.9955），估计检测限为34.2nm（s / n = 3）。具有高灵敏度和优异稳定性和选择性高灵敏度和优异稳定性和优选优异稳定性和选择性的玻璃碳电极以检测真实药物和人类尿液中的DS，以99.60至101.84％。

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