Abstract
The interfacial water structures at surfaces of an as-prepared TiO2 and of the TiO2 after UV irradiation were investigated by sum frequency generation (SFG) spectroscopy and quartz crystal microbalance (QCM). It was shown that UV illumination led to an increase in the amount not only of adsorbed water as a whole but also of the ordered adsorbed water on the TiO2 surface, confirming the increase of hydrophilicity of the surface.
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