The goal of the project is to obtain composite nanoarchitectures based on TiO2 and WO3 with Au or Pt nanoparticles controllably deposited on their surface. The composites will be obtained by three different methods (sol-gel, impregnation, zeta-potential driven association) in order to achieve different contact levels between the two oxides.Thus, the contact between TiO2 and WO3 can be explored, and several questions related to the in-deep understanding of the composite photoactive materials particularities (such as the nature, structure or role of the contact surface) will be answered. Metal nanoparticles will be selectively deposited, by two different methods, namely photodeposition and chemical reduction, on one of the oxide’s surface (TiO2 or WO3) pursuing the changes of the composite’s properties. The obtained catalysts will be characterized in all aspects (especially the nanoparticles interface) using conventional and modern techniques. Photocatalytic and H2 production experiments will be carried out to assess the applicability of these nanocatalysts in environmental depollution and future H2 generation.