Abstract
In-situ S-doped porous anatase TiO2 nanopillars are synthesized by a facile one-step thermal protection method. The prepared photocatalysts are characterized in detail by X-ray diffraction, Raman spectroscopy, N2 adsorption/desorption isotherms, UV–vis diffuse reflectance spectroscopy, X-ray photoelectron spectroscopy, scanning electron microscopy and transmission electron microscopy. The results indicate that the obtained TiO2 samples present porous nanopillar structure, which can maintain the anatase phase at 700 °C calcination. With the calcination temperatures increasing, the doped S atoms in the TiO2 surface decrease gradually. The TiO2 samples calcined at 700 °C (T700) exhibit the optimum visible-light photocatalytic activity, and 163.9 μmol h−1 g−1 of H2 evolution can be obtained. It can be attributed to the high anatase crystallinity, porous structure and S element introduction of T700. Therefore, the obtained photocatalysts will have the potential application in energy and environmental field.
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