TiO2 nanoparticles were prepared by the sol–gel method using sodium dodecyl sulfonate, triton, tetrabutyl
ammonium bromide surfactants and tested for the removal of Orange 2G dye from aqueous under UV light. The
synthesized photocatalysts were characterized by XRD, FTIR, TEM, and BET measurements. The XRD patterns indicated
that the crystalline phase of TiO2 is mainly anatase with crystallite sizes of 17.7-12.6 nm. BET measurements revealed
that the surface area of TiO2 in the range of 293.62- 83.49 m2/g. The obtained results showed that the TiO2 nanoparticles
prepared with the use of tetrabutyl ammonium bromide (TTAB) had a higher photocatalytic activity. The results indicated
that the TTAB can remove 98% of the dye under optimum operational conditions of a dosage of 4 g/L, pH= 3 and a contact
irradiation time of 28 hrs for initial dye concentrations of 1.5 x 10-5 mol/L.