In recent years, much attention has been paid to hematite nanotubes due to their unique properties such as availability, non-toxicity, a large ratio of surface to volume and suitable optical properties. The band gap of the hematite nanotubes is about 1/9-2/2 electron volts and are active in the wavelengths of visible light. For this reason, hematite nanotubes are used in the fabrication visible light sensitive photocatalysts. In this thesis, hematite nanotubes were prepared on the surface of pure iron plate by anodizing method and after thermal treatment, using a photo deposition method, Ag, Pd, Pt, CdS particles were deposited on the surface of the hematite nanotubes. The morphology, crystalline structure and optical properties of the obtained samples were studied using FE-SEM, XRD, Raman, EDX and UV-Vis methods. SEM images showed that hematite nanotubes were prepared on the surface of iron plate by anodizing and also nanoparticles with different morphology have deposited on the surface of prepared samples by photo deposition method under UV light. Crystallization of prepared samples confirmed by XRD diffraction patterns. Energy dispersive X-ray spectroscopy (EDX) was used to analyze the elemental composition of sample surface. Then, photoelectrochemical properties of prepared samples were studied by linear sweep voltammetry (LSV) and choronoamperometry (CA) method. The results showed that the photocurrent density was increased from 55 ?A / cm 2 for ?-Fe 2 O 3 to 400 ?A / cm 2 for HCdS7, 180 ?A / cm 2 for HAg1, 130 ?A / cm 2 for HPt3 and 170?A / cm 2 for HPd1.
