▎ 摘　　要

A nonenzymatic glucose sensor was developed by using the reduced graphene oxide (rGO) and Co3O4 nanocomposites as the sensing material. The hybrid was prepared in a one-pot reaction process by hydrothermal method. The effects of time and temperature in the hydrothermal treatment on the Co3O4-rGO nanocomposites were explored. Co3O4 with size of 5-10 nm was successfully synthesized on the surface of rGO at 150 degrees C for 3 h. These Co3O4-rGO nanocomposites exhibited superior electrochemical activity towards oxidation of glucose. The catalytic current density is linear to the glucose concentration in the range of 0.0005 mM to 1.277 mM with a sensitivity of 1366 mu A cm(-2) mM(-1) and a detection limit of 0.18 mu M. The high sensitivity, low detection limit and good selectivity indicate that the newly developed sensor based on the Co3O4-rGO nanocomposites is a promising sensor for practical application.