A　novel　visible　photocatalysis　nanomaterials　Bi2O3/rGO/TiO2　(BRGT)　was　combined　with　polyethersulfone　membrane　(PES)　and　ceramic　membrane　(CM),　respectively,　to　investigate　the　natural　organic　matter　(NOM)　removal　performance,　membrane　fouling　behavior　and　interfacial　interactions.　The　results　showed　that　NOM　removal　mainly　by　superoxide　radical-dominated　photocatalysis　followed　by　membrane　rejection　enhancing　the　removal　of　fluorescent　humic　and　proteins.　Compared　with　PES,　CM　could　more　effectively　retain　the　low　molecular　weight　acidic　intermediates　and　transitional　or/and　hydrophilic　organic　fractionations　generated　by　photocatalysis.　The　mixture　of　NOM　with　BRGT　(without　photocatalysis)　reduced　the　reversible　fouling　of　the　PES,　causing　an　increase　in　the　interfacial　energy　barrier　of　the　fouling　layer,　while　the　opposite　phenomenon　was　observed　for　CM.　The　photocatalysis　time　affected　the　membrane　fouling,　with　short　photocatalysis　times　(5　min)　causing　an　increase　in　irreversible　fouling.　Extending　the　photocatalysis　time,　the　interfacial　interaction　of　the　PES　dominated　by　Lewis　acid-base　repulsive　interaction　gradually　increased.　And　the　gradual　decreased　of　interfacial　interaction　of　CM　dominated　by　Lewis　acid-base　and　Lifshitz-van　der　Waals　attractive　interactions　reduced　the　possibility　of　reversible　and　irreversible　fouling,　respectively.　This　study　provided　a　deeper　mechanistic　understanding　for　the　application　of　a　novel　photocatalyst　in　combination　with　ultrafiltration.