Ultrafiltration　is　an　environmentally　friendly　water　treatment　technology,　but　membrane　fouling　significantly　impacts　membrane　performance　and　service　life.　Photocatalytic　modification　of　membrane　is　regarded　as　an　effective　way　for　membrane　fouling　control.　In　this　study,　graphite　oxide　(GO),　Ag3PO4　and　Ag3PO4-GO　nanomaterials　were　applied　in　polyvinylidene　fluoride　(PVDF)　ultrafiltration　membranes　modification,　and　the　membranes　was　denoted　as　P-GO,　P-AgP　and　P-AgP@GO,　respectively.　Filtration　of　humic　acid　(HA)　at　different　operating　conditions　was　adopted　in　evaluation　of　membrane　performance.　Among　them,　P-AgP@GO　had　the　best　permeation,　rejection　and　antifouling　performances,　and　could　maintain　excellent　properties　when　operation　conditions　(HA　concentration,　operation　pressure,　pH　and　ionic　strength)　were　changed.　Furthermore,　the　effect　of　photocatalysis　on　the　self-cleaning　performance　and　its　mechanism　were　revealed.　The　overall　performance　of　P-AgP@GO　could　be　enhanced　by　visible　light　irradiation,　and　extending　the　visible　illumination　time　during　the　filtration　was　conducive　to　the　reusability.　(C)　2021　Elsevier　B.V.　All　rights　reserved.