NH2‐GQDs‐Doped Nickel‐Cobalt Oxide Deposited on Carbon Cloth for Nonenzymatic Detection of Glucose

Graphene quantum dots (GQDs) play a vital role in improving electrocatalytic activity during constructing various composites. Among them, heteroatoms‐doped GQDs can further improve the conductivity and electrocatalytic properties of the composites. Herein, NH2‐GQDs‐doped NiCo2O4, grown on carbon cloth, is developed through one‐step hydrothermal process. The NH2‐GQDs doping significantly enhances its electrochemical performance due to its high electron transfer rate and synergistic effects. Severing as freestanding electrochemical electrode, the NH2‐GQDs/NiCo2O4 composite on carbon cloth exhibits low detection limit of 0.27 × 10−6 m and high sensitivity of 2521.33 µA mm−1 cm−2 for nonenzymatic determination of glucose. Furthermore, the fabricated glucose sensor shows outstanding selectivity and reproducibility. These results indicate that the NH2‐GQDs‐doped NiCo2O4 provides a convenient platform for nonenzymatic determination of glucose in the future.