Electrospun Manganese-Based Metal–Organic Frameworks for MnO<sub><i>x</i></sub> Nanostructures Embedded in Carbon Nanofibers as a High-Performance Nonenzymatic Glucose Sensor
So Eun Kim, Jae Chol Yoon, Hyun‐Jin Tae, Alagan Muthurasu
Abstract
High Resolution Image Download MS PowerPoint Slide 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.