Abstract
To meet rising worldwide demands for clean electricity, the technologies for affordable, yet efficient photoactive semiconductors are constantly being developed. The high-surface titania nanotubes are typically obtained through the anodization of a titanium foil, but the created structures are amorphous and require crystallization to improve their electric properties. The heat treatment is usually done via time- and energy-consuming furnace annealing, before any modification of the material can be done. In our work, an alternative, one-step calcination method combined with modification through hydrogenation is investigated. The evaluation of the crystallinity of the electrode is presented based on the Raman and X-ray diffraction, followed by the optical and electrochemical investigation providing quantifiable information regarding the performance of the modified material. Overall, the presented one-step calcination and hydrogenation via rapid thermal annealing allows for a much quicker crystallization and simultaneous modification, resulting in over 2.6-fold higher photocurrent densities and improved visible light absorption.
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