摘要
制备了多壁碳纳米管修饰电极并用于自来水中亚硝酸盐的检测.实验结果表明:该修饰电极对亚硝酸盐氧化具有良好的催化作用,且NO_2^-的氧化动力学过程为扩散控制过程,并在优化实验条件下,NO_2^-在1.0×10^(-5)~1.0×10-3mol·L^(-1)的浓度范围内与其氧化峰电流呈良好的线性关系,检出限为7.6×10^(-6)mol·L^(-1).将该修饰电极用于自来水中NO_2^-的检测,效果良好.
The multi-walled carbon nanotubes（MWNT） modified electrode was fabricated and used to detect nitrite in tap water. Experimental results showed that the modified electrode exhibited good electrocatalytic activity for the oxidation of nitrite and the oxidative process of NO2^-was controlled by diffusion.Under the optimal conditions, the oxidation peak current（ipa） increases linearly with the concentration of nitrite from 1.0×10^-5～1.0×10^-3mol·L^-1 with the detection limit of 7.6×10^-6mol·L^-1. The modified electrode could be applied to the analysis of nitrite in tap water with good results.
出处
《韶关学院学报》
2016年第8期39-43,共5页
Journal of Shaoguan University
关键词
亚硝酸盐
碳纳米管
修饰电极
自来水
nitrite
carbon nanotubes
modified electrodes
tap water
