Characterization and Photocatalytic Activity of Composite La-TiO2/ITO Thin-Film Electrodes
The different molar ratios of La/Ti (0.025, 0.050, 0.075 and 0.100) photocatalytic electrodes use in this study were synthesized by sol-gel method and dip-coating method. The XRD pattern of TiO2/ITO presents only anatase phases,  but for La-TiO2/ITO presents both anatase and rutile phases. The SEM image of the La-TiO2/ITO showed particles of regular shapes with smaller size (＜10nm) compared to the TiO2/ITO, which presented uniform particles of spherical structure and larger size （20nm）.The La-TiO2/ITO photocatalytic electrode with molar ratio 0.050 shows the best ability both on the absorbtion and photocatalytsis. Applied potential 2.0V would effectively increase the photoelectrocatlaytic activity under visible light irradiation.
Yansheng Yin and Xin Wang
M. Y. Chang et al., "Characterization and Photocatalytic Activity of Composite La-TiO2/ITO Thin-Film Electrodes ", Advanced Materials Research, Vols. 79-82, pp. 899-902, 2009