In recent years, titanium nanotubes are attracting attention as photocatalyst; but activity in the UV region of light and high probability of electron-hole recombination create limitations. Precipitation of various compounds or combination with other semiconductors are tried as solutions to this problem. In this thesis, insitu anodizing of titanium dioxide nanotubes doped with tungsten (WO 3 -TiO 2 ) is performed and after annealing precipitation of Prussian blue with the SILAR method in cycles of 2, 3, 5, 7, 9, 10 and 15 is performed. Sample S9 with current density of 115 microampere per square centimeter is chosen as the best sample and, separately, silver particles (samples M) and palladium particles (Samples N) were photodeposited by UV irradiation during 5, 15, 30, 60 and 90 minutes over the surface of S9. Morphology, crystal structure and optical properties of the prepared samples are studied with FE-SEM, UV-VIS, EDX-EDXmapping and XRD methods. Presence of silver, palladium and WO 3 -TiO 2 nanotubes beside which Prussian blue is deposited to reduce the band gap and electron-hole separation is confirmed by these methods. Electrochemical properties of the above samples are studied by liner scanning voltammetry (LSV), chronoamperometry (CA) and open circuit potential (OCP). Further the stability of the samples is studied by chronoamperometry. Among the samples of M and N series, sample M1 which has undergone 5 minutes of silver photodeposition and the sample N3 which has undergone 30 minutes of palladium deposition exhibited the best photocatalytic activity. Current density in M1 and N3 where respectively 250 and 160 microamperes per square centimeter. In the applications section of this work, hydrogen produced from samples where different cycles of Prussian blue deposition was measured and the best result was 45 microliter of hydrogen release per hour. The other cathodic test was for determining the best photoanode for photo-cathodic protection. In this application protection of stainless steel 403 by a photoanode made of WO 3 -TiO 2 precipitated with Prussian blue and palladium was studied.
