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制备了十六烷基三甲基溴化铵-氧化钕纳米修饰电极。用循环伏安法和示差脉冲伏安法研究了NO2-在该修饰电极上的电化学行为,结果表明,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3.33×10-8～1.04×10-6mol/L范围内呈现良好的线性关系,检测限为9.86×10-9mol/L(S/N=3)。此外,该修饰电极具有良好的重现性和稳定性。本方法可用于NO2-实际样品的测定。
Cetyl trimethyl ammonium bromide - neodymium oxide nano-modified electrode was prepared. The electrochemical behavior of NO2- on the modified electrode was investigated by cyclic voltammetry and differential pulse voltammetry. The results show that the modified electrode has good electrocatalytic activity for the oxidation of NO2-. The oxidation peak current of NO2- The linear range was 3.33 × 10-8 ~ 1.04 × 10-6mol / L with the detection limit of 9.86 × 10-9mol / L (S / N = 3). In addition, the modified electrode has good reproducibility and stability. This method can be used for the determination of NO2-actual samples.