Synthesis, Nanostructure and Crystallization of Titania Nanotube Arrays Fabricated by Electrochemical Anodization

Abstract

Titania (TiO2) nanotubes have attracted great attention in recent years for diverse applications including photocatalysis, energy storage, solar cells, water purification, sensors, self-cleaning, molecular separation and drug delivery. This work presents synthesis of the self-organized TiO2 nanotube arrays by electrochemical anodization in fluoride/ethyleneglycol electrolyte and explores their conversion into different crystalline forms. The titania nanotube arrays were produced in several forms such as nanotube layers on Ti foil (or bulk), free-standing layers and nanotube membranes with through-hole morphology and ultrahigh aspect ratio of the length/diameter.