Abstract
Titania (TiO2) nanotubes were successfully synthesized via a facile hydrothermal method. The influence of starting material (TiO2 nanoparticles) content on the conversion of tubular structure during hydrothermal treatment was investigated. Based on the result obtained, it was found minimum 1 g of TiO2 nanoparticles was required for completing the transformation of nanotubular structure. The photocatalytic activity of TiO2 nanotubes was evaluated by degradation of organic methyl orange (MO) dye. Interestingly, one-dimensional TiO2 nanotubes exhibited high photocatalytic oxidation rate (78% degradation) under UV irradiation for 5 hours. The reason was attributed to the high active surface area to generate more hydroxyl radicals (∙OH) for triggering photocatalytic oxidation reactions on the inner and outer surface of TiO2 nanotubular structure.
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