Title of article :
Preparation of TiO2 thin films from autoclaved sol
containing needle-like anatase crystals
Author/Authors :
Lei Ge، نويسنده , , Mingxia Xu، نويسنده , , Haibo Fang، نويسنده , , Ming Sun، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2006
Abstract :
A new inorganic sol–gel method was introduced in this paper to prepare TiO2 thin films. The autoclaved sol with needle-like anatase crystals
was synthesized using titanyl sulfate (TiOSO4) and peroxide (H2O2) as starting materials. The transparent anatase TiO2 thin films were prepared on
glass slides from the autoclaved sol by sol–gel dip-coating method. A wide range of techniques such as Fourier transform infrared transmission
spectra (FT-IR), X-ray diffraction (XRD), thermogravimetry-differential thermal analysis (TG-DTA), scanning electron microscopes, X-ray
photoelectron spectroscopy (XPS) and ultraviolet–visible spectrum were applied to characterize the autoclaved sol and TiO2 thin films. The results
indicate that the autoclaved sol is flavescent, semitransparent and stable at room temperature. The anatase crystals of TiO2 films connect together to
form net-like structure after calcined and the films become uniform with increasing heating temperature. The surface of the TiO2 films contain not
only Ti and O elements, but also a small amount of N and Na elements diffused from substrates during heat treatment. The TiO2 films are
transparent and their maximal light transmittances exceed 80% under visible light region
Keywords :
Needle-like anatase crystals , TiO2 thin films , sol–gel method , Autoclaved sol
Journal title :
Applied Surface Science
Journal title :
Applied Surface Science