Abstract
We report a 3D ordered urchin-like hollow TiO2/ZnO nanorods structure on transparent FTO substrates that serves as photoanode for efficient photoelectrochemical anode. The ordered urchin-like TiO2/ZnO structure is prepared by a combination of colloidal spheres template, atomic layer deposition and hydrothermal growth method. Under simulated sunlight illumination, the CdS sensitized urchin-like TiO2/ZnO photoanode generates a photocurrent of 3.6mAcm−2 at 0V vs Ag/AgCl, which is higher than that of either 2D TiO2/ZnO inverse opals or 1D ZnO nanowire arrays, due to its 3D structural advantages that offers higher surface area for quantum dots loading plus enhanced light scattering ability.
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