This paper reports innovative coupling for the clevelopmeni of caralytic membrane reaciors. Photografiing for the modification of membrane surfaces has been extensively studied and we used the results to optimize metal nanoparticle loading. Polyethersullone hollow fibers were modified by poly(acrylic acid) grafting and the impact of a cross-linked network and a polymer gel grafted layer on metal loading was examined. Transmission electron microscopy images showed well dispersed metal nanoparticles close to the surface. The catalytic activity of the different hollow fibers was assessed by the reduction of pnitrophenol into p-aminophenol and a conversion yield of close to 100% was found. We demonstrated the possibility of obtaining various reactors by varying the residence Lime through alteration of the grafted layer. (C) 2014 Elsevier B.V. All rights reserved