Abstract: Iron-doped titania nanoparticles exhibit a higher photocatalytic activity than pure TiO₂ for the degradation of nitrite.The optimum Fe-doped content in terms of activity is approximately 0.5 %.The increase in photoactivity is probably due to the higher adsorption and the inhibition of electron-hole recombination.The photocatalytic oxidation reaction of nitrite over the Fe-doped TiO₂ catalyst follows zero-order kinetics, which is different from that over pure TiO₂.The reaction rate decreases linearly with the increase of the pH of the solution.

Key words: Nitrite degradation, Photocatalytic oxidation, Titania, Iron doped