Abstract
Fe 3+ doped TiO 2 photocatalysts were prepared by hydrothermal treatment for the photocatalytic water splitting to produce stoichiometric hydrogen and oxygen under visible light irradiation. It was found that hydrothermal treatment at 110 °C for 10 h was essential for the synthesis of highly stabilized Fe 3+ doped TiO 2 photocatalysts. The synthesized photocatalysts were characterized by field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD), ultraviolet–visible diffuse reflectance spectroscopy (UV–vis DRS) and BET surface area techniques. The doping of highly stabilized Fe 3+ in the titania matrix leads to significant red shift of optical response towards visible light owing to the reduced band gap energy. Optimum amount of Fe 3+ doped TiO 2, 1.0 wt% Fe/TiO 2, showed drastically improved hydrogen production performance of 12.5 μmol-H 2/h in aqueous methanol and 1.8 μmol-H 2/h in pure water, respectively. This Fe/TiO 2 photocatalyst was stable for 36 h without significant deactivation in the water splitting reaction.
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