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采用循环伏安法在滴涂碳纳米管的电极表面制备了聚吡咯/K4Fe(CN)6复合膜,研究了该电极的电化学性质及对NO2-的电催化还原。结果表明,固定于聚吡咯膜中的K4Fe(CN)6作为电子递质与碳纳米管和聚吡咯对NO2-电还原具有协同催化作用,安培法检测NO2-的线性范围为1.5×10-6～1.8×10-3mol/L,检出限为3.0×10-7mol/L,该法已用模拟水样中NO-的测定。
The polypyrrole / K4Fe (CN) 6 composite membrane was prepared by cyclic voltammetry on the surface of electrode coated with carbon nanotubes. The electrochemical properties of the electrode and the electrocatalytic reduction of NO2- were investigated. The results show that K4Fe (CN) 6 immobilized in polypyrrole film acts as an electron transmitter in synergistic catalysis with carbon nanotubes and polypyrrole for NO2-reduction. The linear range of amperometric detection of NO2- is 1.5 × 10-6 ~ 1.8 × 10-3mol / L, the detection limit of 3.0 × 10-7mol / L, the method has been used to simulate the determination of NO- in water samples.