Based on the superhydrophilicity of titanium dioxide (TiO₂) after ultraviolet irradiation, it has a high potential in the application of antifogging. However, a durable superhydrophilic state and a broader photoresponse range are necessary. Considering the enhancement of the photoresponse of TiO₂, doping is an effective method to prolong the superhydrophilic state. In this paper, a Fe³⁺ doped TiO₂ film with long-lasting superhydrophilicity and antifogging is prepared by sol–gel method. The experiment and density-functional theory (DFT) calculations are performed to investigate the antifogging performance and the underlying microscopic mechanism of Fe³⁺ doped TiO₂. Antifogging tests demonstrate that 1.0 mol % Fe³⁺ doping leads to durable antifogging performance which lasts 60 days. The DFT calculations reveal that the Fe³⁺ doping can both increase the photolysis ability of TiO₂ under sunlight exposure and enhance the stability of the hydroxyl adsorbate on TiO₂ surface, which are the main reasons for a long-lasting superhydrophilicity of TiO₂ after sunlight exposure.

中文翻译：

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具有持久防雾性能的超亲水性Fe ³⁺掺杂TiO ₂薄膜

基于紫外线照射后二氧化钛（TiO ₂）的超亲水性，在防雾应用中具有很高的潜力。但是，持久的超亲水状态和更宽的光响应范围是必需的。考虑到增强TiO ₂的光响应，掺杂是延长超亲水状态的有效方法。在本文中，通过溶胶-凝胶法制备了具有持久的超亲水性和防雾性的Fe ³⁺掺杂的TiO ₂薄膜。通过实验和密度泛函理论（DFT）计算，研究了Fe ³⁺掺杂的TiO ₂的防雾性能及其潜在的微观机理。。防雾测试表明，掺杂1.0 mol％的Fe ^3+可以产生持续60天的持久防雾性能。在DFT计算表明Fe的³⁺掺杂既能增加TiO 2的光解能力₂太阳光照射下和提高的羟基被吸附物在TiO稳定性₂表面，这是二氧化钛的一个持久的超亲水性的主要原因₂后阳光照射。