Flower-like MoS₂ decorated with Cu₂O nanoparticles for non-enzymatic amperometric sensing of glucose

In this study, a novel nanohybrid consisting of flower-like MoS₂ decorated with Cu₂O nanoparticles has been successfully synthesized for non-enzymatic amperometric sensing of glucose. Structural characterizations revealed that Cu₂O nanoparticles were highly dispersed on MoS₂ nanosheets. Electrochemical performances were investigated by cyclic voltammetry (CV) and chronoamperometry. Compared to single Cu₂O component, the-synthesized Cu₂O/MoS₂ nanohybrid showed superior electrocatalysis to the oxidation of glucose. The fabricated non-enzymatic amperometric glucose sensor exhibited a wide linear range from 0.01 to 4.0mM with a low detection limit of 1.0µM (S/N =3) and a high sensitivity of 3108.87μAmM^-1cm^-2. Meanwhile, the non-enzymatic sensor also possesses satisfactory stability, good reproducibility and high selectivity to interfering components of uric acid, dopamine and ascorbic acid. The excellent analytical performances are resulted from the synergistic effect provided by the Cu₂O nanoparticals and MoS₂ nanosheets.