Preparation and Antibacterial Properties of Ta2O5 Nanorods Doped with Copper on Tantalum

Ta2O5 nanorod films doped with Cu2+ were prepared by a two-step hydrothermal method on tantalum. XRD, SEM and XPS were used to analyze the phase and surface microstructure of the materials. The ion precipitation concentration of samples in normal saline was detected by ICP, and the antibacterial ability of Ta2O5 films with different contents of copper was tested by a plate counting method. The results show that Ta2O5 nanorods with simple rhombic crystal structure are generated on the tantalum surface by two-step hydrothermal treatment, and the doping of Cu2+ does not significantly affect the microstructure and phase of the nanorods. With the increase of time, the precipitation rate of copper ions in copper-doped films gradually tends to be stable. The result of plate counting shows that when the doping amount of Cu2+ reaches 2.68 at%, the copper doped Ta2O5 nanorod film has the best antibacterial performance and the antibacterial rate reaches 99.2%. © 2020, Science Press. All right reserved.