Direct growth of MnCO3 on Ni foil for a highly sensitive nonenzymatic glucose sensor

Here, a novel MnCO3 directly grown on Ni foil for sensitive nonenzymatic glucose detection has been fabricated by a facile hydrothermal approach. The morphologies and structures were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD). These results show that the MnCO3 initially compacted together in particles and then formed random rods due to the mismatch between MnCO3 and substrate. The electrochemical performance of the MnCO3/Ni foil for glucose detection was investigated by cyclic voltammetry (CV) and chronoamperometry, which demonstrates a high sensitivity of 1254.4 μA mM-1 cm-2 with a detection limit of 1 μM at 0.55 V, and a fast response time of 10 s. Moreover, the MnCO3/Ni foil electrode exhibits excellent selectivity from interfering species such as KCl, NaCl, Ascorbic acid (AA), Uric acid (UA) and Dopamine (DA). Thus, the MnCO3 would be a promising material in nonenzymatic glucose detection.