采用循环伏安法制备了多壁碳纳米管负载铁氰化铜·铁修饰复合陶瓷碳电极(CuFeHCF/MWCNT/CCE),研究了该修饰电极的电化学性质及对NO2-的电催化活性.结果表明,该修饰电极对NO2-的电氧化具有强的催化活性,安培法检测NO2-的线性范围为2.0×10-7 ～1.4 x10-3 mol/L,灵敏度为104.1 μA/(mmol·L-1),检出限(3sb)为5.0×10-8 mol/L.利用该方法测定了土壤中NO2-的含量,结果令人满意.
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