石墨烯
微分脉冲伏安法
循环伏安法
电极
材料科学
氧化物
检出限
水平扫描速率
电化学
氧化铜
碳糊电极
伏安法
分析化学(期刊)
纳米颗粒
无机化学
化学
纳米技术
色谱法
物理化学
冶金
作者
Vinoda B. Patil,Shweta J. Malode,Sumitra N. Mangasuli,Suresh M. Tuwar,Kunal Mondal,Nagaraj P. Shetti
出处
期刊:Micromachines
[MDPI AG]
日期:2022-07-23
卷期号:13 (8): 1166-1166
被引量:21
摘要
The electrochemical analysis of theophylline (THP) was investigated by fabricating a carbon paste electrode (CPE) modified with graphene oxide (GO) along with copper oxide (CuO) nanoparticles (CuO-GO/CPE). The impact of electro-kinetic parameters such as the heterogeneous rate constant, the scan rate, the accumulation time, the pH, the transfer coefficient, and the number of electrons and protons transferred into the electro-oxidation mechanism of THP has been studied utilizing electrochemical methods such as cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The differential pulse voltammetry technique was employed to investigate THP in pharmaceutical and biological samples, confirming the limit of detection (LOD) and quantification (LOQ) of the THP. X-ray diffraction (XRD) and scanning electron microscopy (SEM) analysis were performed to characterize the CuO nanoparticles. The CuO-GO/CPE was more sensitive in THP detection because its electrocatalytic characteristics displayed an enhanced peak current in the 0.2 M supporting electrolyte of pH 6.0, proving the excellent sensing functioning of the modified electrode.
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