Hydrophilic and photocatalytic performances of lanthanum doped titanium dioxide thin films
来源期刊：JOURNAL OF RARE EARTHS2013年第10期
论文作者：杜军 李不悔 黄晶晶 张文龙 彭海龙 邹建国
文章页码：992 - 996
摘 要：Pure and La-doped TiO2thin films were prepared on glass by sol-gel method using tetrabutyl titanate as Ti precursors.Their chemical composition,structure and properties were characterized by X-ray diffraction（XRD）,Fourier transform infrared（FT-IR）,UV-Visible spectrophotometer and optical contact angle measuring instrument,respectively.The results showed that the content of La was the key factor for hydrophilic and photocatalytic activity.LaTiO3could be formed in La-doped TiO2thin films,which caused the TiO2lattice distortion and restrained the transition from anatase to rutile.By adding 0.3 wt.%La to the TiO2thin films,the optimal hydrophilic character could be obtained and the contact angle was only 9.6o.La-doped TiO2thin films could expand the wavelength response range of TiO2,and thus increase the speed of the photocatalytic reaction.92.02%of methylene blue was finally degraded when the concentration of La was 0.3 wt.%.The expressions of ln（CA0/CA）as functions of photocatalytic time were deduced which were well consistent with the experimental results.
杜军，李不悔，黄晶晶，张文龙，彭海龙，邹建国
Key Lab of Poyang Lake Ecology and Bio-resource Utilization (Ministry of Education), Department of Chemical Engineering, College of Environmental and Chemical Engineering, Nanchang University
摘 要：Pure and La-doped TiO2thin films were prepared on glass by sol-gel method using tetrabutyl titanate as Ti precursors.Their chemical composition,structure and properties were characterized by X-ray diffraction（XRD）,Fourier transform infrared（FT-IR）,UV-Visible spectrophotometer and optical contact angle measuring instrument,respectively.The results showed that the content of La was the key factor for hydrophilic and photocatalytic activity.LaTiO3could be formed in La-doped TiO2thin films,which caused the TiO2lattice distortion and restrained the transition from anatase to rutile.By adding 0.3 wt.%La to the TiO2thin films,the optimal hydrophilic character could be obtained and the contact angle was only 9.6o.La-doped TiO2thin films could expand the wavelength response range of TiO2,and thus increase the speed of the photocatalytic reaction.92.02%of methylene blue was finally degraded when the concentration of La was 0.3 wt.%.The expressions of ln（CA0/CA）as functions of photocatalytic time were deduced which were well consistent with the experimental results.
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