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基于纳米钯和Nafion膜修饰玻碳电极的甲醛传感器研究

Keywords: 钯纳米粒子,Nafion膜,甲醛,电化学传感器

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Abstract:

采用循环伏安法制备了钯纳米粒子-Nafion修饰玻碳电极(Pd/Nf/GCE)的甲醛电化学传感器,并采用循环伏安法(CV)和微分脉冲伏安法(DPV)研究了甲醛在该修饰电极上的电催化氧化作用.对修饰电极制备条件和实验条件进行了优化,在此基础上建立了一种测定甲醛的伏安分析方法.实验结果表明,甲醛在该传感器上的催化氧化作用显著;在0.1mol/LNaOH溶液中,甲醛的氧化峰电流与其浓度在5.0μmol/L~5.0mmol/L呈良好的线性关系,线性回归方程为:ip=7.69+2.22×104c,相关系数γ=0.9967,检测限为1.0μmol/L,具有良好的重现性和回收率.

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