The water absorptivity and retentivity of titania as well as the water adsorptivity can be enhanced by its photoinduced hydrophilic conversion. The hydrophilic natural clay mineral, allophane, can further enhanced such properties. Titania and/or allophane nanoparticle-dispersing titania films were layered on glass plates by a simple sol–gel process. The influences of the allophane amount and thickness of the allophane-dispersing layer of the nanocomposite films on the hydrophilicity, water absorptivity, and water retentivity were investigated by measuring the contact angle of a water droplet, FTIR spectroscopy, and UV–Vis spectroscopy using a dye molecular probe. The hydrophilicity was enhanced by the UV irradiation and the allophane dispersion. The allophane nanoparticles also effectively increased the water absorptivity and retentivity. The FTIR spectra of the adsorbed water and UV–Vis spectra of the deposited dye were more suitable for the hydrophilicity evaluation of the film’s inside and surface, respectively, because the water molecules can penetrate deeper into the inside of the film (water absorption) than the dye molecules. The temperature on the film surface successfully decreased with increases in the irradiation time and the thickness of the allophane-dispersing layer due to the enhancement of the water retentivity of the film’s inside by the endothermal process of water vaporization.

二氧化钛的光诱导亲水转化可以提高二氧化钛的吸水率和保留率，以及水的吸附率。亲水性天然粘土矿物，脲铝烷可进一步增强此类性能。通过简单的溶胶-凝胶工艺，将分散有二氧化钛和/或脲烷的纳米颗粒分散的二氧化钛薄膜铺在玻璃板上。通过测量水滴的接触角，FTIR光谱和UV-Vis光谱，研究了纳米复合膜中金属脲的数量和厚度，纳米复合膜的金属脲分散层的厚度对亲水性，吸水率和保水性的影响。染料分子探针。紫外线照射和脲基烷分散体增强了亲水性。铝脲烷纳米颗粒还有效地提高了吸水率和保持力。吸附的水的FTIR光谱和沉积的染料的UV-Vis光谱分别更适合于评估膜内部和表面的亲水性，因为与水相比，水分子可以更深地渗透到膜内部（吸水率）染料分子。膜表面的温度随着辐照时间和脲基烷分散层厚度的增加而成功降低，这归因于通过水汽化的吸热过程提高了膜内部的保水性。