高等学校化学学报2024，Vol.45Issue(4)：101-109,9.DOI:10.7503/cjcu20230521
石墨烯-金纳米材料修饰电极用于L-酪氨酸的检测
Graphene-gold Nanomaterial Modified Electrode for the Detection of L-Tyrosine
摘要
Abstract
Using a green and simple electrochemical method,a reduced graphene oxide-gold nanocomposite thin film was prepared for the detection of L-tyrosine(L-Tyr).The modified electrode was characterized via scanning electron microscopy(SEM),cyclic voltammetry(CV),and electrochemical impedance spectroscopy(EIS).The electrochemical behavior of L-Tyr on the modified electrode in 0.1 mol/L phosphate buffer solution was investigated using differential pulse voltammetry(DPV).The results demonstrated a significantly enhanced voltammetric response of L-Tyr on the modified electrode compared to a bare glassy carbon electrode(GCE).Optimization of the composite film's thickness,pH of the supporting electrolyte,deposition potential,and accumulation time were carried out.Under the optimal experimental conditions,the oxidation peak current of L-Tyr exhibited a good linear relationship within the concentration ranges of 0.1-50 μmol/L and 50-1000 μmol/L using DPV.Moreover,the sensor demon-strated a detection limit of 50 nmol/L,a sensitivity of 0.553 μA·μmol·L‒1,and displayed excellent repeatability,stability,and anti-interference properties.关键词
电化学/还原氧化石墨烯/金纳米粒子/共沉积/L-Tyr传感器Key words
Electrochemistry/Reduced graphene oxide/Gold nanoparticle/Co-deposition/L-Tyr sensor分类
化学化工引用本文复制引用
马勤政,王伟,梁旭婷..石墨烯-金纳米材料修饰电极用于L-酪氨酸的检测[J].高等学校化学学报,2024,45(4):101-109,9.基金项目
河北省自然科学基金(批准号:F2019202377)资助. Supported by the Natural Science Foundation of Hebei Province,China(No.F2019202377). （批准号:F2019202377）
