石墨炔负载氧化锌量子点修饰电极用于多巴胺的电化学检测

Electrochemical Detection of Dopamine Using Graphdiyne Supported Zinc Oxide Quantum Dot Modified Electrode

在石墨炔(GDY)中引入氧化锌量子点(ZnO QDs)修饰玻碳电极(GCE),作为电化学传感器用于多巴胺(DA)的检测。用X射线衍射仪(XRD)、高分辨率透射电子显微镜(HRTEM)、傅立叶红外光谱(FTIR)、X射线光电子能谱仪(XPS)表征了电极材料,用循环伏安法(CV)和差分脉冲伏安法(DPV)研究了ZnO/GDY传感器检测性能。结果表明,在0.05~100μmol/L线性范围内,ZnO QDs/GDY/GCE检测DA的检出限为13.4 nmol/L(S/N=3),灵敏度为9.53μA/(μM·cm^(2)),最后,研究了人体血清样品中DA检测的加标实验,血清中的回收率在97.9%~99.5%之间,结果表明,该传感器具有较高的准确性,对于DA的检测,ZnO QDs/GDY建立一个新的传感平台,在实际应用中显示出巨大的潜力。

Zinc oxide quantum dots(ZnO QDs)modified glassy carbon electrode(GCE)was introduced into graphdiyne(GDY)as an electrochemical sensor for the detection of dopamine(DA).The electrode materials were characterized by X-ray diffraction(XRD),high-resolution transmission electron microscopy(HRTEM),Fourier infrared spectroscopy(FTIR),and X-ray photoelectron spectroscopy(XPS).The detection performance of ZnO QDs/GDY sensor was analysised by cyclic voltammetry(CV)and differential pulse voltammetry(DPV).The results show that,In the linear range of 0.05~100μmol/L,the detection limit of DA detected by ZnO QDs/GDY/GCE is 13.4 nmol/L(S/N=3),and the sensitivity is 9.53μA/(μM·cm^(2)),Finally,the spiking experiment of DA detection in human serum samples was researched,and the recovery rate in serum was 97.9%~99.5%.The results showed that the sensor had high accuracy.For the detection of DA,ZnO QDs/GDY established a new sensing platform,which showed great potential in practical applications.