Tailoring the visible light photoactivity of un-doped defective TiO2 anatase nanoparticles through a simple two-step solvothermal process.

摘要: Anatase TiO2 has become a material of great interest for photocatalytic production hydrogen, environmental purification and solar energy conversion. Among the key parameters boosting efficiency anatase nanoparticles, an increased light absorption to expand its optical response visible region, together with improved charge separation photo-generated electrons holes, can be enumerated. In this work, yellow-coloured, single-phase nanoparticles have been obtained using simple two-step solvothermal routine which requires no external addition dopants, nor use harassing/aggressive synthesis atmosphere. The powders display lowered bandgap (<3.0 eV) significantly reduce recombination processes, eventually leading performance under light, as exemplified by enhanced degradation phenol. This exceptional is linked presence intrinsic defects in yellowish particles and, hence, specific conditions proposed methodology crucial produce propitious TiO2-defective nanomaterial capable photo-degrade phenol molecule, contrast lack activity currently exhibited commercial photocatalysts light.