Nonenzymatic Glucose Sensor Based on Porous Co₃O₄ Nanoneedles

Abstract

Herein, porous Co3O4 nanoneedle arrays were synthesized on nickel (Ni) foam (Co3O4 NNs/NF) by one-step hydrothermal method. Some electrochemical methods were used to investigate its nonenzymatic glucose sensing performance in alkaline solution. The results show that the sensitivity of Co3O4 NNs/NF electrode to glucose is 4570 μA mM-1 cm-2. The linear range is 1 μM-0.337 mM, and the detection limit is 0.91 μM ( S / N = 3 ). It also displays good selectivity and repeatability for glucose. The good electrochemical sensing performance of Co3O4 NNs/NF based sensor for glucose can be attributed to interconnected porous structure and large specific surface area of Co3O4.

Highly sensitive detection of glucose at a novel non‐enzyme electrochemical sensing based on Mo‐doped CoO Nanosheets

“…Compared with supported on reduced graphene oxide (NiCo 2 O 4 NWs/rGO), the NiCo 2 O 4 NWs/NF showed a higher sensitivity (5916 μA mM −1 cm −2 ) due to the large electrochemical active surface area and three‐dimensional (3D) interconnected character [27–28] . Therefore, a new self‐supporting electrode material combining active metal nanostructures and supporting materials (such as nickel foam [29] ) will be an ideal way to tackle current challenges, which also contribute to realize the practical application of the intelligence glucose sensors.…”