检出限
纳米复合材料
化学
电化学气体传感器
电化学
扫描电子显微镜
X射线光电子能谱
核化学
化学工程
纳米技术
色谱法
材料科学
电极
工程类
物理化学
复合材料
作者
Qiwen Wang,Haipei Si,Lihui Zhang,Ling Li,Xiaohong Wang,Shengtian Wang
标识
DOI:10.1016/j.aca.2020.01.012
摘要
A novel electrochemical sensor based on ZrO2 and ZnO hybrid nanocomposites was developed for simultaneous determination of epinephrine (EA), uric acid (UA) and folic acid (FA) with the highly selective and ultrasensitive. The nanocomposites have been synthesized by chemical precipitation and thermal calcine method with economical, eco-friendly and practical nature. Their structure and electrochemical properties were investigated by X-ray diffraction (XRD), X-ray photo electron spectroscopy (XPS), scanning electron microscopy (SEM) and electrochemical techniques. The results reveal that the ZrO2/ZnO nanocomposites can possesses highly exposed catalytic sites, favorable conductivity, and the sensor excellent signal response for EP, UA and FA under the optimal condition. The electrochemical sensing platform has a low detection limit of 0.039 μM, 0.29 μM and 0.037 μM and a wide detection range of 0.8-420 μM, 10-2400 μM and 2-480 μM, respectively. It was also tested with a human blood serum sample at physiological pH with recovery 97.3-103.8% and relation standard deviation less than 5%. It indicates that the electrochemical sensors has a hopeful capacity of extensive applications in bioanalysis and diseases diagnosis.
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