Material-specific
electrocatalytic activity and electrode design
are essential factors in evaluating the performance of electrochemical
sensors. Herein, the technique described involves electrospinning
manganese-based metal–organic frameworks (Mn-MOFs) to develop
MnO
x
nanostructures embedded in carbon
nanofibers. The resulting structure features an electrocatalytic material
for an enzyme-free glucose sensor. The elemental composition, morphology,
and microstructure of the fabricated electrodes materials were characterized
by using energy-dispersive X-ray spectroscopy (EDX), field-emission
scanning electron microscopy (FESEM), and transmission electron microscopy
(TEM). Cyclic voltammetry (CV) and amperometric i–t (current–time) techniques are characteristically
employed to assess the electrochemical performance of materials. The
MOF MnO
x
-CNFs nanostructures significantly
improve detection performance for nonenzymatic amperometric glucose
sensors, including a broad linear range (0 mM to 9.1 mM), high sensitivity
(4080.6 μA mM–1 cm–2), a
low detection limit (0.3 μM, S/N = 3), acceptable selectivity,
outstanding reproducibility, and stability. The strategy of metal
and metal oxide-integrated CNF nanostructures based on MOFs opens
interesting possibilities for the development of high-performance
electrochemical sensors.