**3. Morphologies of TiO2**

The proprieties of TiO2 are strongly depends on crystal structure, surface area, crystalline structure, average particle size and porosity. Controlling the morphology of TiO2 nanomaterials is a highly active area of research. In particular, there is many morphologies of TiO2 such as nanowires, nanorods, nanotubes and nanosheets.
