Abstract
Using n-butanol released in situ as the cosurfactant, transparent large-pore mesoporous nanocrystalline anatase(meso-nc-TiO2) thin films with narrow pore size distribution have been successfully synthesized in aTi(OBun)4–P123–EtOH–HCl system. Furthermore, the mesopore size can be easilycontrolled in the range of 8.3–14.0 nm through adjusting the quantities ofTi(OBun)4, correspondingto the amount of n-butanol released in situ. X-ray diffraction, atomic force microscopy, scanningelectron microscopy, transmission electron microscopy, and nitrogensorption were used to investigate the relationship between the amount ofTi(OBun)4 and the structural parameters of the obtainedmeso-nc-TiO2 thin films. A reasonable mechanism is also proposed here to explain the formation of large-pore mesoporousTiO2 with tunable pore diameters. The hydrophilicity of our obtained films wasevaluated by water contact angle measurement in air. It was found that, in theabsence of ultraviolet (UV) illumination, the presented transparent large-poremeso-nc-TiO2 thin films exhibit high hydrophilicity.
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