基于离子液体功能化石墨烯/碳纳米管的葡萄糖传感器的研究(英文)

发布时间：2024-04-12 04:28

　　将离子液体功能化的石墨烯/碳纳米管(G-IL/CNTs)修饰到玻碳电极上,再固载上葡萄糖氧化酶(GOD)和辣根过氧化物酶(HRP),构筑了新型的(G-IL/CNTs)/(GOD+HRP)/GC双酶葡萄糖传感器。用SEM观察电极形貌,发现碳纳米管类似于导线穿插在石墨烯片层中,连接了各石墨烯片层,两者结合形成了三维立体结构,明显提高了石墨烯的分散性,同时由于功能化后的石墨烯与碳纳米管的协同作用,该传感器在葡萄糖的检测上表现了良好的分析性能,传感器的线性范围为0. 004～5 mmol/L,灵敏度为53. 89μA mmol/L^-1cm^-2,检出限为3. 99×10^-7mol/L(S/N=3)。

【文章页数】：8 页

【文章目录】：
1 Introduction
2 Experimental
    2.1 Chemicals and apparatus
    2.2 Synthesis of ionic liquid functionalized gra-phene(G-IL)
    2.3 Preparation of carboxylate carbon nanotubes
    2.4 Preparation of modified electrodes
    2.5 Preparation of the bi-enzyme glucose sensor
3 Results and discussion
    3.1 Characterization of GO,G-IL and G-IL/CNTs
    3.2 Dispersibility of the G-IL and G-IL/CNTs
    3.3 Electrochemical behavior of(G-IL/CNTs)/GC electrodes
    3.4 Optimization of analytical conditions
    3.5 Electrochemical behavior of the(G-IL/CNTs)/(GOD+HRP)/GC sensor
    3.6 Stability and reproducibility
4 Conclusions



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