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采用水合肼原位化学还原法制备了还原氧化石墨烯(rGO)-多壁碳纳米管(MWCNTs)复合物,将该复合物滴涂于玻碳电极表面,通过电化学方法向该复合膜表面沉积了纳米氧化铜(CuO),制得氧化铜-还原氧化石墨烯-多壁碳纳米管三元复合物修饰电极(CuO-rGO-MWCNTs/GCE)。通过扫描电镜、EDS能谱及电化学交流阻抗技术对该电极进行了表征。研究了L-酪氨酸(L-Tyr)在该修饰电极上的电化学行为。结果表明,CuO-rGO-MWCNTs/GCE对L-Tyr的电氧化表现出高的催化活性。在优化实验条件下,安培法检测L-Tyr的线性范围为2.0×10~(-8)~1.8×10~(-4)mol/L,检出限为5.0×10~(-9)mol/L(S/N=3)。
The reduced graphene oxide (rGO) - multiwalled carbon nanotubes (MWCNTs) composites were prepared by hydrazine hydrate reduction in situ chemical reduction method. The composite was applied to the surface of glassy carbon electrode and electrochemically to the surface of the composite film Deposition of nano-CuO to prepare CuO-rGO-MWCNTs / GCE electrodeposited copper oxide-reduced graphene oxide-MWCNT composite ternary composite electrode. The electrode was characterized by scanning electron microscopy, EDS spectroscopy and electrochemical impedance spectroscopy. The electrochemical behavior of L-Tyr at the modified electrode was investigated. The results showed that CuO-rGO-MWCNTs / GCE exhibited high catalytic activity for the electrooxidation of L-Tyr. Under the optimum conditions, the linear range of L-Tyr was 2 × 10 -8 ~ 1.8 × 10 -4 mol / L and the detection limit was 5.0 × 10 -9 mol-1 / L (S / N = 3).