Simple, rapid, and inexpensive fabrication of self-cleaning glass surfaces based on wet chemical deposition of H₂Ti₃O₇ (trititanate) and subsequent transformation of it into TiO₂ (anatase) nanowires on pristine glass surfaces is reported. Despite the low, 55%, surface coverage, the nanowire roughened glass surface showed self-cleaning properties comparable to much thicker, over 100-nm-thick, TiO₂ nanoparticle coated glasses. The superwettable surface showed 12° contact angle. Moreover, ultraviolet (UV) and natural light activated photocatalysis remained effective at enhancing the self-cleaning process in the case of the TiO₂ nanowire coated glass. Time-resolved study of the water droplet spread in millisecond time scales revealed that capillary forces induced by the random nanowire network significantly enhance the water sheeting effect of these textured glass surfaces. Time-resolved experiments revealed that the spreading velocity of the droplets were enhanced by 19% for the TiO₂ nanowire roughened surface and reached a v₀ = 508 mm/s initial spreading speed. Outdoor experiments validated the concept that TiO₂ nanowire coated glass possess self-cleaning properties with significantly reduced titania content compared to nanoparticle based films.

中文翻译：

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对光催化二氧化钛纳米线涂层玻璃的优异水成膜效果

据报道，基于H ₂ Ti ₃ O ₇（三钛酸酯）的湿化学沉积，然后将其转化为原始玻璃表面上的TiO ₂（锐钛矿）纳米线，可以简单，快速且廉价地制造自清洁玻璃表面。尽管表面覆盖率低至55％，但纳米线粗糙的玻璃表面仍具有自清洁性能，可与厚度超过100 nm的TiO ₂纳米颗粒涂层玻璃相比更厚。超湿表面的接触角为12°。此外，在TiO ₂的情况下，紫外线（UV）和自然光活化的光催化在增强自清洁过程方面仍然有效。纳米线涂层玻璃。时间分辨研究以毫秒为单位的水滴扩散表明，随机纳米线网络引起的毛细作用力显着增强了这些有纹理的玻璃表面的水覆盖效果。时间分辨实验表明，对于TiO ₂纳米线粗糙表面，液滴的扩散速度提高了19％，达到了初始扩散速度v ₀ = 508 mm / s。户外实验验证了以下概念：与基于纳米颗粒的薄膜相比，涂覆有TiO ₂纳米线的玻璃具有自清洁特性，二氧化钛含量明显降低。