In this work, experimental conditions were established to fabricate self-ordered rutile-TiO2 nanotube arrays, coated with a conformal anatase-TiO2 thin layer using atomic layer deposition. E. coli inactivation tests showed a considerable increase in photocatalytic activity using rutile-TiO2 nanotubes coated with anatase-TiO2 compared to that using single rutile or anatase TiO2 nanotubes only. Photocatalytic hydroxyl radical generation rates (determined by pNDA bleaching) were also meaningfully enhanced for the combined anatase/rutile TiO2 nanostructures. Therefore, we show that it is possible to take advantage of the morphological properties of the materials and the synergic effect from the combination of both TiO2 polymorphs during the design of novel materials, which could be used as antibacterial agents to improve the quality of drinking water.

中文翻译：

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金红石型TiO2纳米管上原子层沉积的锐钛矿型TiO2薄膜的增强光催化细菌失活。

在这项工作中，建立了实验条件来制造自定序的金红石型TiO2纳米管阵列，并利用原子层沉积法涂覆了保形的锐钛矿型TiO2薄层。与仅使用单一金红石或锐钛矿型TiO2纳米管相比，使用灭活酶-TiO2包覆的金红石型TiO2纳米管，大肠杆菌的灭活测试显示光催化活性显着提高。对于组合的锐钛矿/金红石型TiO2纳米结构，光催化羟基自由基的生成速率（由pNDA漂白确定）也得到了有意义的提高。因此，我们表明，在新型材料的设计过程中，可以利用两种材料的形态特性和两种TiO2多晶型物的组合产生的协同效应，可以将其用作抗菌剂以改善饮用水的质量。 。