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制备了十六烷基三甲基溴化铵-多壁碳纳米管修饰电极。用循环伏安法和示差脉冲伏安法研究了NO2-在该修饰上的电化学行为,该修饰电极对NO2-的氧化具有良好的电催化能力,NO2-的氧化峰电流与其浓度在1.67×10-7～2.2×10-5mol/L范围内呈现良好的线性关系,检测限为5.6×10-8mol/L(S/N=3)。此外,该修饰电极具有良好的重现性和稳定性。方法可用于NO2-样品的测定。
Cetyl trimethyl ammonium bromide - multi-walled carbon nanotube modified electrode was prepared. The electrochemical behavior of NO2- was investigated by cyclic voltammetry and differential pulse voltammetry. The modified electrode had good electrocatalytic activity for the oxidation of NO2-. The oxidation peak current of NO2- was similar to that of NO2- with a concentration of 1.67 × The linear range was 10-7 ~ 2.2 × 10-5mol / L with the detection limit of 5.6 × 10-8mol / L (S / N = 3). In addition, the modified electrode has good reproducibility and stability. The method can be used for the determination of NO2-samples.