Optical, structural, morphological and chemical properties of doped TiO₂ nanoparticles with FeCl₃

Abstract To achieve high photocatalytic activity, TiO 2 nanoparticles require an excitation source in ultraviolet radiation. Incorporating chemical elements into the lattice can tune its band gap, resulting edge-shifted red absorption to reduce energies, improving performance visible region of electromagnetic spectrum. In this research, semiconductor were subjected a doping process using iron chloride (FeCl 3 ) powder activate photocatalysis under light and consequently improve pollutant capture. study effectiveness process, main ratios (1:1), (1:1.622) (1:3) :FeCl evaluated Diffuse Reflectance Spectroscopy (DRS), X-ray diffraction (XRD), Fourier-Transform Infrared (FTIR) Scanning Electron Microscopy (SEM). The results research show that with FeCl shifted edge longer wavelength values, changing optical properties material decreasing gap (E g compared undoped (reference). There are no relevant differences between XRD pattern samples -FeCl fraction anatase phase doped has same magnitude as reference . Regarding FTIR, Fe-doping alters spectrum, increasing intensity hydroxyl bonds peaks particularly, indicating Ti-O-Fe bond vibration.