Superhydrophilic TiO2 surfaces generated by reactive oxygen treatment
Superhydrophilic TiO2 surfaces generated by reactive oxygen treatment
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DOI：
10.1116/1.4736946
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发表时间：
2012-07
期刊：
影响因子：
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通讯作者：
N. Ishida;D. Fujita
中科院分区：
文献类型：
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作者：
N. Ishida;D. Fujita
作者表明，无需用紫外 (UV) 光照射表面并同时激发电子空穴对，即可获得超亲水性 TiO2。作者证明，用空气等离子体产生的活性氧对 TiO2 表面进行处理可以去除表面有机污染物，导致表面几乎达到 0° 接触角润湿。超亲水性可以通过使用有效表面张力计算的正铺展系数来解释。我们的研究结果表明，紫外线照射是 TiO2 超亲水性的间接原因，并支持这样的假设：这种特性源于基于表面有机污染物的光氧化和分解的自清洁效应。
The authors show that superhydrophilic TiO2 can be obtained without irradiation of the surface with ultraviolet (UV) light and concomitant excitation of electron-hole pairs. The authors demonstrate that the treatment of TiO2 surfaces with reactive oxygen species generated by air plasma removes the surface organic contaminants, leading to almost 0° contact-angle wetting of the surface. The superhydrophilicity can be explained by the positive spreading coefficient calculated using the effective surface tensions. Our results point toward UV-light irradiation as an indirect cause of the superhydrophilicity of TiO2 and support the hypothesis that this property arises from a self-cleaning effect based on the photo-oxidation and decomposition of organic contaminants at the surface.