Water treatment/purification: the objective is to achieve high flux and low fouling membranes to incorporate in a cross-flow filtration device. Functional nanoparticles (like N-doped TiO2, TiO2/Ag/Cu functionalized sepiolites) having photocatalytic and biocidal activities will be incorporated in hydrophilic polymer membranes. Easy access to functional nanoparticles will be granted by fabricating hollow/porous nanofibers and placing the former in the latter’s core.