▎ 摘　　要

This paper reports on the antibacterial performance (AP) of free standing three-dimensional graphene nanosheets (3D-GNS) with a high density of graphene edges, prepared by the electrochemical exfoliation of graphite. The 3D-GNS exhibits an outstanding AP against E. coli, reaching-100% at a low concentration of 40 mg/L after 4 h of exposure, while the AP of the graphite mother is measure to be-10% under same conditions. Electron microscopy reveals that sharp nanoedges in 3D-GNS can efficiently cut bacterial cells into fragments.