Pt/TiO₂ Nanosheets Array Dominated by 001 Facets with Enhanced Photocatalytic Activity

001 facets dominated single crystalline anatase TiO₂ nanosheet array (TNSA) was synthe-sized through an optimized organic solvothermal route on uorine-doped tin oxide substrate. The field emission scanning electron microscopy images and X-ray diffraction patterns re-vealed that the 001 synthesized facets dominated TNSA exhibited much higher orientation than that synthesized by hydrothermal route. The TNSAs were loaded with Pt nanoparti-cles in uniformly size by using a photodecomposition method, which were further con rmed by high resolution transmission electron microscopy (HRTEM). The HRTEM images also revealed that Pt nanoparticles preferred to deposit on 001 facets. With loading of Pt nanoparticles, the optical absorbance was significantly enhanced, while the photolumines-cence (PL) was inhibited. The photocatalytic activity of TNSA was signi cantly improved by Pt loading and reached the maximum with optimal amount of Pt loading. The optimal amount of Pt on 001 facets is far less than that on TiO₂ nanoparticles, which may be attributed to the specific atom structure of reactive 001 facets.