Effect of Pore Size on the Hydrophilicity in Dark of TiO2 Films
Mesoporous TiO2 films was prepared by evaporation-induced self-assembly and dip-coating method. And the pore size of the TiO2 films is adjusted by controlling the molar ratio of H2O/TiO2 (H value). Water contact angle was chosen to represent the hydrophilic property, and XRD and AFM were carried out to characterize the films. With the increase of H value, the pore size increased firstly then decreased. And when H is 15, the pore size is the biggest, which hydrophilicity in dark is the best too. With the extention of the non-irridation time, the hydrophilicity is worse. And the reason may be ascribed to the adsorption of organic matter in air.
Q. Wang et al., "Effect of Pore Size on the Hydrophilicity in Dark of TiO2 Films", Applied Mechanics and Materials, Vols. 130-134, pp. 1049-1053, 2012