Ce3＋-doped and undoped Ti02 nanofilms are prepared on glass surface using a sol-gel method. Crystal structure, surface morphology, chemical composition and element distribution of both glass substrates and TiO2 films...Ce3＋-doped and undoped Ti02 nanofilms are prepared on glass surface using a sol-gel method. Crystal structure, surface morphology, chemical composition and element distribution of both glass substrates and TiO2 films were characterized by x-ray diffractometer （XRD）, atomic force microscopy （AFM） and x-ray photoelectron spectroscopy （XPS）. The XRD results indicate that the Ce3＋-doped TiO2 tilms are solely composed of the anatase phase whereas in the undoped films a small amount of the futile phase of TiO2 is present. AFM observations show that there exist many micro-cracks and micro-boles on glass substrate surface. In contrast, the surface of pure titania films is crack-free and the average crystallite size of the films is less than 50nm. For the films doped with Ce3＋, not only does it appear to be more uniform and compact, but also the corresponding crystal size is decreased. XPS results indicate that element interdiffusion occurs between the titania nanofilm and the glass substrate during the sintering process. The film is firmly adhered onto the glass surface through the chemical combination of Ti-O-Si bonds, and the combination is more enhanced by Ce3＋-doping.展开更多
基金Supported by THE National Natural Science Foundation of China under Grant No 50562003, and the Colleges and Universities Scientific Research in Inner Mongolia of China （NJ10075）.
文摘Ce3＋-doped and undoped Ti02 nanofilms are prepared on glass surface using a sol-gel method. Crystal structure, surface morphology, chemical composition and element distribution of both glass substrates and TiO2 films were characterized by x-ray diffractometer （XRD）, atomic force microscopy （AFM） and x-ray photoelectron spectroscopy （XPS）. The XRD results indicate that the Ce3＋-doped TiO2 tilms are solely composed of the anatase phase whereas in the undoped films a small amount of the futile phase of TiO2 is present. AFM observations show that there exist many micro-cracks and micro-boles on glass substrate surface. In contrast, the surface of pure titania films is crack-free and the average crystallite size of the films is less than 50nm. For the films doped with Ce3＋, not only does it appear to be more uniform and compact, but also the corresponding crystal size is decreased. XPS results indicate that element interdiffusion occurs between the titania nanofilm and the glass substrate during the sintering process. The film is firmly adhered onto the glass surface through the chemical combination of Ti-O-Si bonds, and the combination is more enhanced by Ce3＋-doping.
