首页|Structure and Morphology of Sol-Gel Nanocrystalline TiO_2 Films Coated on Glass Substrates
Structure and Morphology of Sol-Gel Nanocrystalline TiO_2 Films Coated on Glass Substrates
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NETL
NSTL
Trans Tech Publications Ltd
The Ce~(3+)-doped and undoped nanocrystalline TiO_2 films were prepared on glass substrates surface by sol-gel dip coating technique. The crystal structure and surface morphology of TiO_2 films were characterized by means of X-ray diffractometer (XRD), transmission electron microscopy (TEM) and atomic force microscope (AFM). The results indicated that the Ce~(3+)-doped TiO_2 films were solely composed of the anatase phase whereas in the undoped films small amount of the rutile phase of TiO_2 were present. The average crystallite size of the undoped TiO_2 films was about 30nm and was decreased with Ce~(3+)-doping in the TiO_2 films. Moreover, the grains distributed more uniform and the surface roughness was smaller in the Ce~(3+)-doped TiO_2 films than in the undoped one. The action mechanism of Ce~(3+)-doping inhibits the crystallization of the rutile phase and decreases the anatase granularity of TiO_2 films is associated with its physicochemical properties, as well as ionic diffusion and valance change of Ce~(3+) to Ce~(4+) in the sintering process.
NETL
NSTL
Trans Tech Publications Ltd
