Numerous　superwetting　separation　membranes　have　been　designed　for　the　management　of　oily　wastewater　due　to　their　highly　efficient　oil/water　separation　efficiency.　However,　the　long-term　stability　of　these　developed　membranes　is　still　restricted　by　membrane　fouling.　In　this　study,　we　synthesized　multifunctional　superhydrophilic　membranes　with　superior　anti-adhesive　and　anti-biofouling　properties　through　simple　co-deposition　of　dopamine,　polyethyleneimine　and　CoFe2O4　(CFO)　photocatalyst　on　the　porous　PVDF　substrates　for　sustainable　management　of　oil-in-water　emulsion.　The　resultant　optimal　composite　membranes　showed　the　superhydropilicity　with　an　underwater　oil　contact　angle　of　162.4°　and　achieved　ca.　99.51　%　oil/water　separation　efficiency　with　a　maximum　permeability　of　232.2　L·m−2·h−1　in　the　treatment　of　oil-in-water　emulsions　driven　by　gravity.　Moreover,　the　outstanding　antibacterial　performance　of　composite　membrane　was　demonstrated　by　a　nearly　100　%　antibacterial　rate　during　the　exposure　in　120-min　visible　light　irradiation.　Based　on　the　synergistic　effect　of　superhydrophilicity　and　photocatalysis,　the　fabricated　composite　membranes　experienced　a　stable　gravity-driven　oil/water　separation　(oil　rejection:　＞99.46　%)　even　after　a　50-cycle　filtration.　Such　an　impressive　filtration　performance　of　the　polydopamine/PEI/CFO　composite　membranes　highlights　their　promising　potential　for　sustainable　and　efficient　treatment　of　oily　wastewater.　©　2024　Elsevier　B.V.