Ni-MOF/PANI-Derived CN-Doped NiO Nanocomposites for High Sensitive Nonenzymic Electrochemical Detection

Flower-like carbon and nitrogen atomic doped NiO nanocomposite (CN-NiO) has been derived from the Ni-MOF/polyaniline (PANI) calcined at high temperature, which is used to construct a nonenzymic electrochemical sensor by coating it on glassy carbon electrode (GCE). The results of electrochemical tests show that the CN-NiO@GCE has the linear dependency of current response on glucose concentration ranged from 5.0 × 10–7 to 3 × 10–3 mol/L. It has higher sensitivity (1144 μA/mM/cm2) and lower detection limit (5.0 × 10–7 mol/L). In addition, the resulting CN-NiO@GCE shows long-term stability. At the same time, this electrode has good selectivity, with no electrochemical response to the interfering concomitant such as urea, nifedipine, ascorbic acid and dopamine. It indicates that Ni-MOF-derived CN-doped NiO nanocomposites are good electrochemical sensing materials, which find potential application to fabricate nonenzymic electrochemical recognition and detection devices.