In this work, we describe a simple anodization process of titanium in a hot phosphoric acid/ethylene glycol electrolyte that forms a hierarchically structured photocatalytically active TiO₂ layer that consists directly of anatase nanocrystallites. Such anodic layers show, without any annealing, a high photocatalytic degradation activity for AO7 (an azo‐dye used as model pollutant) that is higher than the activity of comparable fully crystallized TiO₂ nanotube layers. Furthermore, the hierarchically structured layers have a remarkable mechanical bending stability. These features make these novel anodic layers highly promising for applications in flexible substrate based photocatalytic devices.

中文翻译：

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乙二醇/邻-H3PO4电解质中形成的分层阳极TiO2纳米结构，用于直接光催化

在这项工作中，我们描述了在热磷酸/乙二醇电解质中钛的简单阳极氧化工艺，该工艺形成了直接由锐钛矿纳米晶体组成的分层结构的光催化活性TiO ₂层。这样的阳极层在没有任何退火的情况下显示出对AO7（用作模型污染物的偶氮染料）的高光催化降解活性，高于可比的完全结晶的TiO ₂纳米管层的活性。此外，分层结构的层具有显着的机械弯曲稳定性。这些特征使得这些新颖的阳极层极有希望用于基于柔性基底的光催化装置中。