@article{Ellouzi_Regraguy_Hajjaji_Harir_Schmitt-Kopplin_Lachheb_Laânab_2023, title={Synthesis of Fe-doped TiO2 with improved photocatalytic properties under Vis-L irradiation}, volume={12}, url={https://oiccpress.com/iranian-journal-of-catalysis/article/synthesis-of-fe-doped-tio2-with-improved-photocatalytic-properties-under-vis-l-irradiation/}, DOI={10.30495/ijc.2022.1941684.1875}, abstractNote={Fe-doped TiO2 nanoparticles were successfully synthesized by the coprecipitation method. TiO2 was doped with a different molar ratio of iron amounts, namely 0.1% and 0.2%. An undoped TiO2 was also prepared for comparison. X-ray diffraction (XRD), transmission electron microscopy (TEM) and UV-visible diffuse reflectance spectroscopy techniques were used to characterize the as-synthesized nanoparticles. The XRD spectra revealed that the photocatalysts were mostly in a well-crystallized anatase phase. Optical properties of the powders shifted from UV to the beginning of the visible light (Vis-L) region. Absorption edge wavelengths between 392 and 380 nm were obtained for the Fe-doped TiO2 and TiO2-P25, corresponding to band gap energies between 3.17 and 3.26 eV. TEM images showed homogeneity with a certain degree of agglomeration for all the samples. The photocatalytic efficiency of the as-synthesized Fe-doped TiO2 nanoparticles was performed using azo dye methyl orange (MO) in an aqueous solution under Vis-L irradiation. The photocatalytic results showed that Fe-doped TiO2 nanoparticles effectively degrade MO under Vis-L excitation and follow pseudo-first order kinetics. Besides, kinetic comparison showed that pure TiO2 is less efficient than 0.1% and 0.2% Fe-doped TiO2 because they exhibit unequaled efficiency. Moreover, the photocatalyst at 0.2% Fe-doped TiO2 molar ratio revealed the highest photocatalytic efficiency, which was 4.2 times higher compared to pure TiO2. Different amounts of Fe induced different increases in the apparent first-order rate constant of the photocatalytic process. Highlights Synthesis of Fe/TiO2 via coprecipitation method. Fe-TiO2 materials observed greater performance than that of pure Degussa P25. The photo-activity of iron-doped TiO2 under visible light irradiation was evaluated. The pseudo-first-order rate kinetics indicates a rate-limiting step involving a chemical reaction. }, number={3}, journal={Iranian Journal of Catalysis}, publisher={OICC Press}, author={Ellouzi, Imane and Regraguy, Boutaina and Hajjaji, Souad El and Harir, Mourad and Schmitt-Kopplin, Philippe and Lachheb, Hinda and Laânab, Larbi}, year={2023}, month={Dec.}, keywords={Titanium dioxide, Coprecipitation, Photocatalytic Degradation, Iron, MO.} }