Fabrication of Superhydrophobic Titanium Oxide and Study of Its Superhydropbilicity Induced by Irradiation of Ultraviolet Light

A flower-like TiO2 thin film with micro and nano composite structure was deposited on the glass substrate by the hydrothermal reaction,many papillaes were found on its surface.The film showed perfect superhydrophobicity after being modified by octyltrimethoxysilane with a static contact angle of 164° and the glide angle of 4°.The film was changed to superhydrophilicity with a static contact angle of 0° after being irradiated under ultraviolet light for 4～6 hours.Elements on the surface of the film were investigated by the infrared spectra and X-ray photoelectron spectroscopy,finally the wettability of the film was also discussed on the basis of Cassie's theory.