阳极氧化制备TiO2纳米管及其光催化性能研究

Highly aligned TiO2 nanotube arrays were prepared on the surface of titanium by anodic oxidation. The effects of different oxidation voltages on the growth characteristics of nanotube arrays were investigated. The microstructure and phase composition of TiO2 nanotube arrays after roasting were analyzed by XRD and FESEM. The antibacterial activities of TiO2 nanotubes after roasting were studied using Staphylococcus aureus as a strain. The results show that when the oxidation voltage is 20 V, there is a small pitting on the surface of the titanium plate, and no nanotube arrays are formed. With the increase of the oxidation voltage from 40 V to 80 V, a neat nanotube coating was found on the surface of the titanium plate. With the increase of the oxidation voltage, the diameter of the nanotube increases and the tube wall becomes smaller. The TiO2 nanotube array is amorphous without roasting. When the calcination temperature is 400 C, the phase of TiO2 is anatase. When the oxidation voltage is 40 V, the photocatalytic activity of the material is the best.