Abstract
AbstractSurface modification of titanium dioxide, TiO2, by codoping with nitrogen and iron to get the photocatalyst active under ordinary visible light was investigated for the photocatalytic degradation of methylene blue. The sol-gel method was used in preparing the modified titanium dioxide. Titanium tetraisopropoxide (TTIP), ammonium nitrate and ferric nitrate were used as precursors with the dopant concentration of 1% and calcination temperature at 600°C. The prepared photocatalyst samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) surface area, ultraviolet (UV)–visible diffusive reflectance spectra (DRS), and X-ray photoelectron spectroscopy (XPS) in order to study their physical properties. The results from XRD confirmed that all prepared photocatalyst were of the anatase phase whereby the codoping photocatalyst perfectly fitted with the standards and also found with high BET surface area. The analysis of band gap energy from UV-vi...
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