Fabrication, characterization and optical properties of TiO₂ nanotube arrays on boron-doped diamond film through liquid phase deposition

Abstract

TiO₂ nanotube(TiNT) arrays were deposited on boron-doped diamond films by a liquid-phase deposition method with ZnO nanorod arrays as the template. The different morphologies of TiNTs have been obtained by controlling the morphology of ZnO template. The X-ray diffraction and energy-dispersive X-ray analysis show that the ZnO nanorod arrays template has been removed in the TiNTs formation process. The crystalline quality of the TiNTs is improved by increasing the annealing temperature. The band gap of the TiNTs is about 3.25 eV estimated by the UV-Vis absorption spectroscopy, which is close to the value of bulk TiO₂. In the photoluminescence spectrum, a broad visible emission in a range of ca. 550–750 nm appears due to the surface oxygen vacancies and defects.

Keywords

TiO₂ nanotube array / Boron doped diamond / Lquid phase deposition / Optical property

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