Multi-modal TiO_2-LaFeO_3 composite films with high photocatalytic activity and hydrophilicity

摘要

In this paper, a series of multi-modal TiO_2-LaFeO_3 composite films have been successfully synthesized through a two-step method. The resultant films were characterized in detail by several testing techniques, such as X-ray diffraction (XRD), ultraviolet-visible diffuse reflection spectrum (UV-vis DRS), photolumi-nescence spectrum (PL), surface photovoltage spectroscopy (SPS) and water contact angle measurements. The photocatalytic activity of different films was evaluated for degrading Methylene Blue (MB) aqueous solution. Hydrophilicity of the obtained TiO_2-LaFeO_3composite films was also investigated. The results show that TL film and LT film exhibited superior photocatalytic activity and hydrophilicity.