Fig. 9. Selected images of damaged skin treated with P25TiO2NPs 10% (left) and healthy skin treated with VitaminB2@P25TiO2NPs 10% (right).
Sulphate process. The ilmenite is reacted with sulphuric acid giving titanium sulphate and ferric oxide. After separation of ferric oxide, addition of alkali allows precipitation of hydrous titanium dioxide. The washed precipitate is calcined in a rotary kiln to render titanium dioxide. The nucleation and calcination conditions determine the crystalline structure of titanium dioxide (e.g. rutile or anatase).