In this thesis, WO 3 /TiO 2 nanotubes (WO 3 /TNTs) were synthesized by the anodizing method. Subsequently, tin has been successfully deposited on them at different times by electrodeposition method in order to achieve higher photocatalytic performance than WO 3 /TiO 2 . Then, these materials were subjected to thermal treatment at 450 °C in order to attain the anatase phase of TiO 2 . The obtained photocatalysts were characterized by FE-SEM, XRD, UV-Vis DRS, EDX and Raman spectroscopy. The photocatalytic activity of these photoanodes was studied with Chronoamperometry (CA), Linear Sweep Voltammetry (LSV), and Open Circuit Potential (OCP) methods. The results showed that WT 5 has the highest photocatalytic activity. In addition, these photocatalysts were used in hydrogen evolution process from water splitting and data have been shown that the WT 5 photoanode has the highest efficiency.