MOF‐Derived Spinel NiCo₂O₄ Hollow Nanocages for the Construction of Non‐enzymatic Electrochemical Glucose Sensor

Abstract

Non‐enzymatic glucose sensor is greatly expected to take over its enzymatic counterpart in the future. In this paper, we reported on a facile strategy to construct a non‐enzymatic glucose sensor by use of NiCo2O4 hollow nanocages (NiCo2O4 HNCs) as catalyst, which was derived from Co‐based zeolite imidazole frame (ZIF‐67). The NiCo2O4 HNCs modified glassy carbon electrode (NiCo2O4 HNCs/GCE), the key component of the glucose sensor, showed highly electrochemical catalytic activity towards the oxidation of glucose in alkaline media. As a result, the proposed non‐enzymatic glucose sensor afforded excellent analytical performances assessed with the aid of cyclic voltammetry and amperometry (i–t). A wide linear range spanning from 0.18 μΜ to 5.1 mM was achieved at the NiCo2O4 HNCs/GCE with a high sensitivity of 1306 μA mM−1 cm−2 and a fast response time of 1 s. The calculated limit of detection (LOD) of the sensor was as low as 27 nM (S/N=3). Furthermore, it was demonstrated that the non‐enzymatic glucose sensor showed considerable anti‐interference ability and excellent stability. The practical application of the sensor was also evaluated by determination of glucose levels in real serum samples.

Design of ZIF-67 MOF-derived Co3O4/NiCo2O4 nanosheets for supercapacitor electrode materials

“…29 Besides, two metals with different diffusion rates can form inner defects and assist in forming a hollow structure due to the Kirkendall effect. 30 From Figure 4(d), it can be seen that the morphology of NiCo 2 O 4 inherits the hollow structure after completing the one-step annealing, but it exhibits larger cavities than the precursor because of decomposition of the organic components and structural reorganization during the calcination process. 31 The SEM images in Figure 4 − in the solution, which coprecipitate with Ni 2+ ions to generate nanosheets.…”

3D Ultralight Hollow NiCo Compound@MXene Composites for Tunable and High-Efficient Microwave Absorption

“…To obtain bimetallic NiCo LDH, the ZIF-67 templates are gradually etched by the H + protons, meanwhile the Co 2+ enable to be partially oxidized into Co 3+ by the NO 3 − and dissolved oxygen. Finally, the co-precipitation of both Co 2+ /Co 3+ and Ni 2+ facilitates the formation of the hollow NiCo LDH nanocages [ 29 , 30 ]. Moreover, the LDHT nanocages can be transformed into TMOT nanocages after calcination treatment.…”

NiCo2O4 Nano-/Microstructures as High-Performance Biosensors: A Review

“…Spinel NiCo 2 O 4 hollow nanocages were prepared by using Co-based zeolite imidazole frameworks (ZIF-67) as a template and precursor by Feng et al [ 228 ]. Morphological characterization revealed that the thickness of the cage shell was about 30 nm.…”