To address the need for effective vis response photocatalysts, we have synthesised WO3 and TiO2 nanowires to provide a fast transport channel for the photo-generated electrons which can retard the charge recombination. We are working on improving the visible activity of the catalysts through modifying the nanocomposites using metal (Ag, W, V, Fe, Ni) and non-metal (C, N, B, S) elements, and through the control over the microstructure or even over the crystal phase.