Formation of ZnO thin films by photocatalytic reaction

- ZnO thin films were formed on a very thin TiO2 film by a photocatalytic reaction.
- Layered zinc hydroxides were deposited from an aqueous zinc nitrate solution.
- Zinc hydroxides were dehydrated and transformed into ZnO at 338-358 K.
- ZnO crystals with 1-2 μm-sized hexagonal columns and 10 nm-sized spheres were formed.
- Average crystallite size of ZnO decreased with an increase in reaction temperature.