TiO2 hollow spheres with nanoporous structures fabricated by anodization of Ti particles

Abstract

TiO₂ hollow spheres with nanoporous structures on their surfaces were prepared by the anodization of small Ti particles and the subsequent leaching of the residual metal. The geometrical structures of the TiO₂ porous layers could be controlled by changing the anodization conditions. Au-loaded TiO₂ hollow spheres were also obtained by depositing Au nanoparticles on the surface of the TiO₂ spheres. The obtained porous hollow spheres and metal loaded TiO₂ composite hollow spheres can be applied to various types of functional devices.