A chemical method was used to prepare titanium dioxide nanoparticles (TiO₂ NPs) samples  T1 ,T2 and T3  by sseveral different oxidizing agents H₂O₂ , NH₄OH , and 50% mixture respectively, which diagnosis by  several techniques X-Ray diffraction (XRD),  Fourier transform infrared (FT-IR), and  Field emission Scanning Electron Microscopy  (FE-SEM) , which proved the success of the preparation process at the nanoscale level. Where the titanium oxide particles samples  T1, T2 and T3  have an average particle size equal to (6.5, 8.8, 24.8 nm ) respectively, Titanium dioxide particles samples  T1, T2 and T3  were used in the process of adsorption of Congo Red dye from its aqueous solutions using a batch system. The titanium dioxide particles gave different adsorption efficiency of Congo red dye up to more than 77, 68, 10 % respectively, As a result of the foregoing, titanium dioxide particles forms T1, T2 can be considered an efficient adsorbent surface in the field of organic pollutants and dyes in particular.

doi.org/10.32737/0005-2531-2026-1-128-137