將離子液體功能化的石墨烯/碳納米管(G-IL/CNTs)修飾到玻碳電極上,再固載上葡萄糖氧化酶(GOD)和辣根過氧化物酶(HRP),構筑了新型的(G-IL/CNTs)/(GOD+HRP)/GC雙酶葡萄糖傳感器。用SEM觀察電極形貌,發(fā)現(xiàn)碳納米管類似于導線穿插在石墨烯片層中,連接了各石墨烯片層,兩者結(jié)合形成了三維立體結(jié)構,明顯提高了石墨烯的分散性,同時由于功能化后的石墨烯與碳納米管的協(xié)同作用,該傳感器在葡萄糖的檢測上表現(xiàn)了良好的分析性能,傳感器的線性范圍為0. 004～5 mmol/L,靈敏度為53. 89μA mmol/L^-1cm^-2,檢出限為3. 99×10^-7mol/L(S/N=3)。

【文章頁數(shù)】：8 頁

【文章目錄】：
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



本文編號：3951663