Preparation of CdSe-TiO<sub>2</sub> Nanotube Array Films and their Photoelectric Properties under Visible Light

Abstract

In this paper, CdSe-TiO2 nanotube array composite films were successfully prepared through a two-steps method. TiO2 nanotube arrays were firstly prepared by anodic oxidation method, based on which the composite films of CdSe-TiO2 nanotubes arrays were prepared by electrochemical deposition. The influence of the concentration of SeO2 on the structure and photoelectric performance of the composite films were studied by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM) and photocurrent response tests. The results show that the cubic phase CdSe particles with the size of about 15~20 nm were uniformly distributed in highly ordered TiO2 nanotubes and around the mouths of the nanotubes; With the increasing of concentration of SeO2, the content of CdSe increases gradually while the photocurrent density of the composite films increased and decreased, The optimal photoelectric performance of composite films were obtained when the SeO2 concentration was 4 mmol/L.