Synthesis of photocatalytic TiO2 nanoparticles: optimization of the preparation conditions

Nanosized titanium oxide (TiO2) powders were prepared by sol–gel route. The preparation parameters are optimized by means of Malachite green oxalate degradations. All catalysts were analyzed by X-ray diffraction (XRD) and BET technique. The best catalyst was compared to TiO2-P25 using two other types of pollutant, 4-hydroxy benzoic and benzamide (BZ) and their performance was found to be strongly dependant on the pollutant’s type.