Facile Synthesis of Self-Sensitized TiO_2 Photocatalysts and Their Higher Photocatalytic Activity

摘要

"Self-sensitized" TiO_2 photocatalysts sensitized by TiO_2 nano-crystals with quantum structures were successfully prepared via a solvothermal process and a facile subsequent treatment process. We calculated an optimized structure by using a pseudo-potential Hartree-Fock method and investigated the structure using X-ray diffraction, scanning, and transmission electron microscopy, and UV-Vis spectrophotometer. The self-sensitized products exhibit an extremely high photocatalytic activity due to their unique optical properties. To discuss the optical properties of the 3-D nanoparticles sensitized by the TiO_2 nano-crystals, we proposed a model of the electron band structure of the as-prepared products to give a reasonable explanation for such a high photocatalytic activity.