Abstract
NH
3 atmosphere in ball milling plays an important role in preparing TiO
2−
X
N
X
by a simple mechanochemical reaction. The results show that the structure transformation of titania milled in NH
3 is greatly delayed compared with that in air. The specific surface area of titania milled in NH
3 for 2
h is two times larger than that in air. It was also found that titania prepared in NH
3 has obvious absorbance for visible light. Mechanochemical milling in NH
3 atmosphere offers a new route to prepare TiO
2−
X
N
X
with high surface area.
The specific surface area (BET) of titania varies with the increase of milling time in air and gaseous ammonia.