Synthesis of visible-light-driven TiO_2 yolk-shell spheres with {001} facets dominated mesoporous shells

摘要

Anatase phase visible-light-driven TiO_2 yolk-shell spheres with the size of ca.1-2μm have been synthesized with the combination of solvothermal and heat treatment method.XRD,SEM,TEM.XPS,and PL analysis were used to examine structure and properties of the photocatalyst.The N species and Ti^(3+) centers introduced into the as-prepared photocatalyst can enhance the visible light absorption significantly.The mesoporous shell of the prepared photocatalyst,which promotes the pollutant adsorption ability,consists of the high-reactive(001) facets dominated nanocrystals.Due to the unique structure,it is also observed that the as-prepared visible-light-driven TiO_2 yolk-shell spheres exhibit a superior photocatalytic activity for organic dyes decomposition than the well-known P25.