Titanate nanotubes: synthesis, properties and loading with silver-nanoparticles for photochromic application

High aspect ratio titanate nanotubes with large surface area and good uniformity were produced by alkaline hydrothermal treatment of grounded TiO₂ aerogels and further by applied freeze-drying. Not only the crystal phase and diameter but also morphology of the starting materials impact on the aspect ratio and transformation efficiency of obtained nanotubes. Other parameters, such as the pH value during neutralization process and drying method for the final products, are important on control over the length and dispersion of the tubes. The high quality nanotubes with good crystallinity and uniform dispersion became a good supporter for Ag nanoparticles to exhibit multicolor photochromism behavior, which has great potential application on electronic device.