Hollow core-shell structured Cu2O@Cu1.8S spheres as novel electrode for enzyme free glucose sensing.

This study reports a novel hollow Cu2O@Cu1.8S material used as a catalyst for enzyme free glucose detection. Cu2O@Cu1.8S is successfully synthesized by a facile in-situ growth method. The obtained Cu2O@Cu1.8S exhibits a hollow structure with a Cu1.8S rich surface. Compared to Cu2O spheres, electrochemical results reveal that the Cu2O@Cu1.8S material exhibits a much higher catalytic activity toward glucose oxidation due to synergistic effect between Cu2O and Cu1.8S. The as-prepared Cu2O@Cu1.8S produces a high sensitivity, a fast sensing response, a wide linear range in concentrations of 1-1000 μM, and an excellent selectivity, thus prove to be a promising catalyst for enzyme free glucose detection.