Research Progress of Titanium Dioxide Core-shell Photocatalysts

In recent years,the core-shell structures of titanium dioxide as photocatalyst have attracted great interest due to their high catalytic activity,substantial stability and brilliant perspective in applications.The core-shell hybrid materials of titanium dioxide combine metal,semiconductor,magnetic materials and the core-shell structures composed by titanium dioxide completely as photocatalyst have been reviewed briefly.It is reported that the photocatalytic capabilities of titanium dioxide with core-shell structures are enhanced obviously when combined with metal,se-miconductor and metallic ions.The core-shell hybrid materials of titanium dioxide combine magnetic materials as photocatalyst are helpful for separating the photocatalyst from reaction solution,and however their photocatalytic capabilities are not very well.The core-shell structures composed by titanium dioxide completely show size-selectivity for decomposition of organics.The future research directions for titanium dioxide core-shell materials are presented tentatively,including further studying their photocatalytic mechanism and exploring the easily prepared and recycled tita-nium dioxide core-shell structure with high photocatalytic capabilities.