Bio-alcohol induced self-assembly of heterojunctioned TiO2/WO3 composites into a hierarchical yolk-shell structure for photocatalysis.

In the fabrication of efficient multicomponent semiconductors for photocatalysis, well-defined hierarchical structures and high-quality heterojunctions are still highly desired. A general preparation method was developed for a series of hierarchical TiO2-based heterojunctions with tailored interior space from solid, core-shell and yolk-shell to fully hollow structures.