Properties of nanotubular titania structures (TiO₂-NTs) have been widely evaluated in small electrodes at lab scale. A novel experimental approach to overcome the limitations for the anodization of large size electrodes is presented. Several potentiostatic and galvanostatic anodization procedures have been tested, and their impact on the morphological features of the TiO₂-NTs analyzed. A clear relationship between the applied voltage and current density and the NTs length and diameter is confirmed. Photocatalytic activity of the TiO₂-NTs structures was evaluated in the methanol oxidation reaction. From these results, it was obtained that kinetic constant for the photocatalytic oxidation of methanol is higher when the reaction is carried out with NTs of higher length/diameter aspect ratio. This is related to a higher TiO₂ active surface area available to generate photo-induced electron-hole pairs and for the adsorption of the reactants. This work confirms the viability of formation of photocatalytically active large size TiO₂-NTs electrodes when high voltage or current density is applied under controlled conditions. Availability of fluoride in the electrolyte can be ensured by the use of a novel concept of continuous flow anodization reactor allowing the renovation of the electrolyte to keep under control not only the composition but also the temperature of the solution.

纳米管二氧化钛结构（TiO ₂ -NTs）的性能已在实验室规模的小型电极中得到了广泛评估。提出了一种新颖的实验方法，可以克服大型电极阳极氧化的局限性。测试了几种恒电位和恒电流阳极氧化程序，并分析了它们对TiO ₂ -NTs形态特征的影响。确认了施加的电压和电流密度与NTs长度和直径之间的明确关系。TiO _2的光催化活性在甲醇氧化反应中评价-NTs的结构。从这些结果可以看出，当用具有更高的长度/直径长径比的NT进行反应时，甲醇的光催化氧化的动力学常数更高。这与较高的TiO ₂活性表面积有关，该表面积可用于产生光诱导的电子-空穴对并用于反应物的吸附。这项工作证实了形成光催化活性大尺寸TiO ₂的可行性-NTs电极在受控条件下施加高电压或高电流密度时。可以通过使用连续流动阳极氧化反应器的新颖概念来确保电解质中氟化物的可用性，该新颖概念允许电解质的翻新不仅控制组成而且控制溶液的温度。