Document Type

Article

Publication Date

2024

Abstract

Using a combination of two fuels, an auto-combustion method was used to synthesize pure TiO2 and doped TiO2 with different concentrations of iron(III) (Fe) and manganese(II) (Mn) (1, 3, 5, and 7 mol%). The as-prepared materials were characterized using different techniques, including thermogravimetric analysis (TGA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), field emission scanning electron microscopy (FE-SEM), and high-resolution transmission electron microscopy (HR-TEM). The XRD results showed that both pure TiO2 and all doped TiO2 samples had the anatase phase, indicating the crystalline nature of all the as-prepared nanomaterials. Crystal violet decolorization under UV irradiation was used to assess the photocatalytic activity of the prepared samples. The findings showed that, compared to other dopant concentrations, TiO2 with a dopant concentration of 5% Fe and 7% Mn showed the highest degradation rates (95.93% and 96.3%, respectively) at 100 and 70 min, with pseudo-first order rate constants of k = 2.91 X 10-2 and 4.8 X 10-2 min-1 , respectively. It was found that superoxide radicals and hydroxyl radicals were the main reactive species responsible for dye degradation.

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