采用阳极氧化法制备出高度有序的TiO2纳米管阵列作为基础电极,通过电沉积法将纳米镍颗粒负载在基础电极上,从而制备了纳米镍-二氧化钛纳米管( Ni/TiO2NTs)修饰电极.分别采用扫描电子显微镜和X射线衍射对Ni/TiO2NTs电极的形貌及组分进行了表征.将Ni/TiO2NTs电极用于对胰岛素的电化学测定.结果表明,在0.1mol/L NaOH支持电解液中,胰岛素在Ni/TiO2 NTs电极上有较好的电化学响应,胰岛素浓度在0.8～1.6 μmol/L范围内,峰电流密度与其浓度呈良好的线性关系,检测限为0.28 μmol/L,灵敏度为0.49×10-3 A/( μnol·L-1·cm-2).
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