TiO2 is promising material for preparing photocatalysts for water splitting and hydrogen production using solar energy. Due to its large band gap 3.2eV, anatase cannot absorb sun light effectively in visible light (VIS) spectral part. Percious metal nanopraticles are promising dopants for TiO2 activation as those can decrease band grap of anatase and increase photocatalytic activity significantly. Also the morphology of TiO2 plays an important role in photocatalyst activity (did you mean photocatalytic activity?). In this research self-organized TiO2 nanotube and nanopore layers were prepared by electrochemical anodization and plasma electrolytic oxidation (PEO) of titanium foil. TiO2 nanofiber layers were prepared by using microwave-assisted sysnthesis. Chemical deposition method was used to modify obtained substrates with gold nanoparticles. All modified samples showed higher photocatalytic activity than pure TiO2 nanostructures.