多壁碳纳米管修饰玻碳电极用于过氧化氢的检测

MWNTs Modified GC Electrode for Hydrogen Peroxide Determination

构建用于过氧化氢检测的多壁碳纳米管修饰玻碳电极,循环伏安阳极最大电流法和计时安培电流法测试表明:碳纳米管能提高电极的有效表面积,并加速电子的传递.循环伏安阳极最大电流和计时安培响应电流均与过氧化氢的浓度变化成线性关系,两种检测方法的灵敏度和线性相关系数分别为2.8μA/(mmol.L-1)、0.997和1.5μA/(mmol.L-1)、0.971;检测方法过程简单,结果令人满意.

A MWNTs modified GC electrode was constructed successfully to be used to detect hydrogen peroxide. Two methods of maximum anodic current of cyclic voltommogram and chronoamperometry were adopted to measure the concentration of hydrogen peroxide. The results show that the MWCNTs can enlarge the effective surface area of GC electrode and can enormously enhance the electron transfer. The sensitivity and correlation coefficient for hydrogen peroxide detection are 2.84 μA/mmol · L^-1 , 0. 997 and 1.5 μA/mmol· L^-1 , 0. 971 for cyclic voltammetry and chronoamperometry, respectively. The procedure of the two methods to detect hydrogen peroxide is simple, and the results obtained are satisfied.