In-situ Ti3+/S doped high thermostable anatase TiO2 nanorods as efficient visible-light-driven photocatalysts
In-situ Ti 3+ /S doped high thermostable anatase TiO 2 nanorods using ethanediamine-modified TiOSO 4 as precursor are synthesized under 700 °C calcination , then combined with controllable in-situ solid-phase reaction method, calcined at 350 °C in argon. The outcomes declare that the obtained photocatalyst with a high crystallinity is effectively doped with S element and Ti 3+ species, and synchronously possesses one-dimensional (1D) anatase nanorods structure with length of ∼ 2–5 μm and width of ∼0.5–1 μm. The S and Ti 3+ co-doped 1D nanorod with a narrowed bandgap (2.56 eV) stretches the optical response range to visible-light. The visible-light-driven photocatalytic degradation efficiency of methyl orange and H 2 production rate for Ti 3+ /S-TiO 2 nanorods are as high as 96% and 166 μmol h −1 g −1 , showing about 6 times greater than 600-TR (TiO 2 nanorods). This is be ascribed to the synergistic reaction of S and Ti 3+ species co-doping narrows the bandgap and promotes the separation efficiency of photoexcited carriers, and the one-dimensional structure favors the transportation of photogenerated charge carriers. Hence, the prepared photocatalyst will have a great latent application prospect in fields of energy and environment.
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