TiO_2/WO_3 Layered Film with Dual-Function of Anti-UV Light and High Photoelectrocatalytic Activity: Facile Preparation and Characterization

摘要

Using magnetron sputtering, followed by post calcination TiO_2, WO_3, and TiO_2/WO_3 layered films were prepared using magnetron sputtering and followed by post calcination. The film structures and morphologies were checked using XRD, Raman spectroscopy, FE-SEM, XPS, and UV-Vis spectros-copy. The TiO_2 and WO_3 films are of anatase and orthorhom-bic structures. The WO_3 underlayer of the TiO_2/WO_3 film grows in [002] direction, almost perpendicular to substrates. Compared with the TiO_2 film, the TiO_2/WO_3-layered film effectively absorbs near-UV fight. The photocurrent of layered TiO_2/WO_3 film is much higher than that of TiO_2 film under UV fight illumination. The photoelectrocatalytic activity of the films was evaluated in two-electrode photocatalytic reactor, which is assisted by bias voltage. It is seen that PEC activity of TiO_2/WO_3 film is almost four times higher than pure TiO_2 film. Summarily, the TiO_2/WO_3-layered film with dual-function of anti-UV fight and high PEC activity was prepared using facile magnetron sputtering.