Abstract:
The gas-solid phase reactions of TiN nanopowders both with and without impregnation pretreatment were studied. Effects of n-butanol and hydrochloric acid on the formation of rutile TiO
2 were analyzed. TiN nanopowders without impregnation are oxidized into anatase TiO
2 at 350~550℃. Whereas rutile TiO
2 are obtained from TiN nanopowders impregnated with mixed solution of n-butanol and hydrochloric acid in air at 380℃. The result of XRD and TEM images indicate that rutile TiO
2 are rod-like with 16nm in radial direction. It shows that hydrochloric acid acts as the fundamental substance for rutile TiO
2 from TiN nanopowders at low-temperature, while n-butanol mainly inhibits the agglomeration of TiO
2.
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