Abstract
Different kinds of oriented TiO2 nanorod arrays have been actively pursuing in recent years, however, these fabrications relied on the substrates, such as fluorine-doped tin oxide glass (FTO), silicon wafer or other semiconductor precursor layer. Herein, a stable Ti3+ and oxygen vacancies doped blue TiO2 flakes composed of oriented nanorod arrays were synthesized using a facile hydrothermal treatment in diluted hydrochloric acid solution. Such centimeter-scale flake-like TiO2 product was obtained without any substrate. Since Ti3+ self-doped and/or oxygen vacancies TiO2 could extend the absorption range of TiO2 to visible light region, the blue TiO2 sample exhibited excellent photocatalytic activity under visible light irradiation (photocatalytic degradation efficiency can nearly reach up to 100% within 60 min).
Published Version
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