Synthesis and Characterization of Nano-sized Nitrogen Doped TiO₂ by Mechanochemical Method

Nitrogen doped TiO₂ nano-sized powders were prepared by the mechanochemical reaction method and the property of the powders were analyzed and characterized.The mixed powder of doping sources hexamethylenetetramine(HMT)and raw TiO₂ was milled by high energy ball mill.The prepared powders mainly consist of anatase and brookite.Compared with raw material,the N-doped powder has smaller particle size and larger specific surface areas.The N-doped powder shows excellent absorption for visible light λ>400 nm, the absorbed band“red shift”to about 530 nm.