A Patterned TiO 2 (Anatase)/TiO 2 (Rutile) Bilayer‐Type Photocatalyst: Effect of the Anatase/Rutile Junction on the Photocatalytic Activity

Coupling of anatase and rutile TiO2 in a bilayer form significantly increases photocatalytic activity relative to the individual components. Reducing the dimensions of the junction to the charge-separation distance is of importance in increasing this activity. The interfacial electron transfer from anatase to rutile (<10 μm) was revealed by labeling and visualizing the reduction sites by deposition of Ag nanoparticles (see picture).