Wastewater organic pollutant degradation by photocatalysis using semiconductor transition metal oxide catalysts such as ZnO or TiO2 has been extensively investigated in the last decade. Nevertheless, because of their large band gap, the optical absorption of transition metal oxides is limited to the UV spectral region. Also, transition metal ion oxides based photocatalysts are characterized by fast recombination rate of the photo-generated electron and hole pairs. Thus, the reduction of the band gap allowing extension of the absorption towards the visible region, would have significant practical implications in the formation of charge carriers and radical active species (O2-·, HO·) needed for organic pollutant degradation. We prepared nanocomposites materials in form of thin films, using semiconductors and graphene oxide (GO) platelets with improved photocatalytic properties. Thin films were grown by ultraviolet matrix assisted pulsed laser evaporation (UV-MAPLE) deposition method using a frequency quadrupled Nd: YAG laser source (λ=266 nm, τFWHM ~ 4 ns, υ=10 Hz). The morphology and physico-chemical properties of the composite materials have been characterized in detail and correlated with their functional properties. The photocatalytic activity has been tested through the degradation of organic dye solutions under either UV or Vis light irradiation conditions.