Synthesis of Different TiO2 Nanostructures and Their Physical Properties

Titanium dioxide(TiO) nanosheet, nanorod and nanotubes are synthesized using chemical vapor deposition(CVD) and anodizing processes. TiOnanosheets are grown on Ti foil which is coated with Au catalyst in CVD,TiOnanorods are synthesized on treated Ti foil with HCI by CVD, and TiOnanotubes are prepared by the three-step anodization method. Scanning electron microscopy shows the final TiOstructures prepared using three processes with three different morphologies of nanosheet, nanorod and nanotube. X-ray diffraction verifies the presence of TiO. TiOsheets and rods are crystalized in rutile phase, and TiOtubes after annealing turn into the anatase crystal phase. The optical investigations carried out by diffuse reflection spectroscopy reveal that the morphology of TiOnanostructures influencing their optical response and band gap energy of TiOis changed for different TiOnanostructures.