Carbon Cloth Loaded NiCo2O4 Nano-Arrays to Construct Co-MOF@GO Nanocubes: A High-Performance Electrochemical Sensor for Non-Enzymatic Glucose

Constructing and developing nanoarray structures made of non-noble metals that are extremely sensitive to glucose is highly significant. Based on this, this paper used a simple hydrothermal method to orderly grow NiCo
₂
O
₄
nanowires on flexible carbon cloth to construct ZIF-67@GO nanocubes, a Co-based metal organic framework (Co-MOF) in situ. The preparation of composite materials not only provides a larger surface area and more effective active sites, but also improves charge transport and electrocatalytic performance. Systematically studying the charge transfer process of the composite material and the catalytic oxidation of glucose detection results. Research has revealed that the sensor exhibits excellent electrochemical activity in the process of glucose detection, with a detection linear range of
$0.3\mu \text{M}$
- 5.407 mM, a high sensitivity of
$990.12~\mu \text{A}$
mM
$^{-{1}}$
cm
$^{-{2}}$
, low detection limit of
$0.16~\mu \text{M}$
(S/
$\text{N}=3$
), and a fast response time within 2 s. Additionally, the material has excellent selectivity, reproducibility and stability. Growing NiCo
₂
O
₄
on CC and constructing a synergistic ZIF-67@GO composite material can overcome the shortcomings of traditional MOF stability and poor conductivity, and its effective electrochemical properties for glucose sensing can provide directions for the determination of biologically active molecules.