Electrochemical determination of 4-nitrophenol at polycarbazole/N-doped graphene modified glassy carbon electrode

摘要: Abstract Polycarbazole (PCZ)/nitrogen-doped graphene (N-GE) composite was prepared by electropolymerization of carbazole on the N-GE modified glass carbon electrode (N-GE/GCE) for fabricating a novel electrochemical sensor 4-nitrophenol (4-NP). The PCZ/N-GE shows high conductivity and well-distributed nanostructure. redox behavior 4-NP at PCZ/N-GE/GCE investigated in acetate buffer solution cyclic voltammetry (CV), compared with bare GCE, reduced oxide (RGO), PCZ GCEs. results indicate that all electrodes show enhanced reduction peak currents. However, exhibits highest current most positive potential 4-NP, which reflects has best electrocatalytic activity towards 4-NP. performance to are contributed synergic effect highly large surface area, can greatly facilitate electron-transfer processes between electrolyte electrode. An developed based under optimized conditions. linear concentration range 8 × 10 -7 ∼2 × 10 -5 M. low detection limit estimated be 0.062 μM (S/N = 3). also applied real water samples.