Hierarchical α-Fe2O3 microcubes supported on Ni foam as non-enzymatic glucose sensor

Hierarchical α-Fe 2 O 3 microcubes supported on Ni foam (NF) have been successfully prepared using Fe-MOF as a precursor combined with a hydrolysis process, which can be used as the electrodes directly for effective non-enzymatic glucose sensing. The structures and compositions of the as-prepared α-Fe 2 O 3 /NF electrode materials were carefully characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and energy dispersive spectroscopy (EDS), respectively. The α-Fe 2 O 3 /NF electrodes exhibit excellent glucose oxidation performance with a response time < 3 s and a sensitivity of 10,356 μA mM −1 cm −2 . Additionally, the material shows good anti-interference sensing performance and stability for glucose detection in the presence of ascorbic acid (AA), dopamine (DA), cysteine (Cys), uric acid (UA), NaCl and other interferences. It is believed that α-Fe 2 O 3 /NF composite can act as a promising electrode material for non-enzymatic glucose sensing applications, and the materials design strategy can be also expanded for other functional systems.