A highly transparent and super-hydrophilic double-layer anti-reflection coating was prepared by a simple and economical sol-gel method based on the glass substrate. The bottom and top layer were respectively made with SiO 2 –TiO 2 sol and SiO 2 –TiO 2 -PEG300 sol. The average transmittance of the substrate coated with the double-layer coating is increased by 7% up to 97.4% in the visible light band, and the peak transmittance reaches 99% at about 550 nm. In addition, double-layer anti-reflection coating shows a good super-hydrophilic self-cleaning performance, and the transmittance of the coating can be restored by simple washing with water. Furthermore, due to the existence of anatase TiO 2 , the composite coating can restore the super-hydrophilicity damaged by dust under UV light.

中文翻译：

---

高透光率和超亲水性的SiO 2 -TiO 2 / SiO 2 -TiO 2 -PEG300双层减反射膜

通过简单且经济的溶胶-凝胶法，基于玻璃基板制备了高度透明且超亲水的双层减反射涂层。底层和顶层分别由SiO 2 -TiO 2溶胶和SiO 2 -TiO 2 -PEG300溶胶制成。在可见光带中，涂有双层涂层的基材的平均透射率增加了7％，最高达到97.4％，并且峰值透射率在大约550 nm处达到99％。另外，双层抗反射涂层显示出良好的超亲水性自清洁性能，并且可以通过用水简单洗涤来恢复涂层的透射率。此外，由于存在锐钛矿型TiO 2，该复合涂层可以恢复在紫外线下粉尘所破坏的超亲水性。