Ag–TiO 2 hybrid nano-powders were synthesised by hydrothermal method (HS) at 18002°C for 202h. TEM and AFM analyses have shown that Ag nanoparticles embedded within the coarser TiO 2 particles have a spherical shape with a diameter of 702nm whilst the size of the TiO 2 nanoparticles is found to be around 4002nm. It is also shown that the calcined (50002°C for 102h) hybrid composite particles result in the formation of anatase TiO 2 . The synthesised Ag–TiO 2 nanopowders were dispersed in ethanol to obtain stable colloidal suspensions and used to coat Ni-based filters using electrophoretic deposition (EPD) using an applied voltage of 3002V for 202min. Overall, it is shown that hydrothermal processing is an effective way of synthesising nano-sized Ag–TiO 2 hybrid powders in a short time and EPD is a good way to get full coating onto 3-D Ni-based filters if stable suspensions are used.