ZIF-67 derived Co/N carbon hollow fiber membrane with excellent decontamination performance

•Large-scale fabrication of ZIF-67-derived conductive Co/N-co-doped carbon hollow fiber membranes.•Gradient enhanced removal of multiple pollutants under electric field assisted fast filtration conditions.•Integration of electrochemical, separation and nanocatalysis processes.•Synchronized generation of membrane matrix and active sites.•Electroreduction of cobalt species leading to leaching free and reusable catalysts.