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文章编号: 16726987(2018)05001506; DOI: 10.16351/j.16726987.2018.05.002
赵琨, 孟阿兰*
(青岛科技大学 化学与分子工程学院, 山东 青岛 266042)
摘要: 首先以三聚氰胺为原料制备出gC3N4纳米材料;再将壳聚糖(CS)与gC3N4混合并滴涂在玻碳电极表面,制得CSgC3N4/GCE电极;最后将葡萄糖氧化酶(GOX)滴涂并用Nafion膜将其固定在CSgC3N4/GCE电极表面,制得Nafion/GOX/CSgC3N4/GCE葡萄糖生物传感器,实现了葡萄糖氧化酶的直接电化学。采用透射电子显微镜(TEM)、X射线衍射仪(XRD)、循环伏安法(CV)及差分脉冲伏安法(DPV)等手段对所制备的电极进行了表征和测试。结果表明:所制得的Nafion/GOX/CSgC3N4/GCE葡萄糖生物传感器的响应范围为01~80 mmol·L-1,检出限为467 μmol·L-1,MichaelisMenten常数为042 mmol·L-1。该生物传感器可以排除尿酸(UA)、抗坏血酸(AA)、多巴胺(DA)等的干扰,表现出优异的抗干扰性和选择性。此外,该生物传感器还表现出较好的重复性和稳定性,可应用于实际样品检测。
关键词: 葡萄糖氧化酶; gC3N4纳米复合膜; 修饰电极; 直接电化学
中图分类号: O 648.12+4文献标志码: A
引用格式: 赵琨, 孟阿兰. Nafion/GOX/CSgC3N4/GCE的制备及其在葡萄糖生物传感器中的应用\[J\]. 青岛科技大学学报(自然科学版), 2018, 39(5): 1520.
ZHAO Kun, MENG Alan. Preparation of Nafion/GOX/CSgC3N4/GCE and its application in glucose biosensor\[J\]. Journal of Qingdao University of Science and Technology(Natural Science Edition), 2018, 39(5): 1520.
Preparation of Nafion/GOX/CSgC3N4/GCE and Its
Application in Glucose BiosensorZHAO Kun, MENG Alan
(College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)Abstract: In this paper, gC3N4 nanocomposite were prepared with tripolycyanamide as raw materials. And then chitosan (CS) and gC3N4 was mixed and coated on the surface of the glassy carbon electrode to prepare the CSgC3N4/GCE electrode. Finally, the Nafion/GOX/CSgC3N4/GCE electrode based on direct electrochemistry of glucose oxidase(GOX) was fabricated by immobilizing GOX on glassy carbon electrode (GCE) functionalized by CSgC3N4 nanocomposites. The electrode was characterized by transmission electron microscopy (TEM), Xray diffractometer (XRD), cyclic voltammetry (CV) and differential pulse voltammetry (DPV). The results show that the Nafion/GOX/CSgC3N4/GCE glucose biosensor had a response range of 01—80 mmol·L-1, a detection limit of 467 μmol·L-1, and a MichaelisMenten constant of 042 mmol·L-1. The biosensor could eliminate the interference of UA, AA, DA, exhibiting the excellent selectivity and antiinterference performance. Moreover, the biosensor also showed pretty reproducibility and stability, and it can be applied to the detection of actual samples.
Key words: GOX; gC3N4 nanocomposite film; modified electrode; direct elelctrochemistry
收稿日期: 20170804
基金项目: 国家自然科学基金项目(51572137).
作者简介: 赵琨(1992— ),女,硕士研究生.*通信联系人.