Takingadvantageoftheuniquepropertyofgrapheneoxide(GO)nanomaterialsinexpandingthelight-
response rangeofTiO2, wemodified thesurfaceofwater filtration membraneswithTiO2–GO toenhance
their photocatalyticactivitiesunderbothUVandsunlightirradiations.Alayer-by-layerapproachwas
employedtosequentiallydepositTiO2 nanoparticles andGOnanosheetsonapolysulfonebase
membrane, withGOpartiallyreducedviaethanol/UVpost-treatment.ThegraftingofTiO2–GO onthe
membrane surfacewasconfirmed throughtheanalysisofQCM-DmeasurementsandSEMimages.We
then studiedthephotocatalyticpropertiesofthesurface-modified membranesinbothbatchand
filtration experimentsusingmethyleneblue(MB)asarepresentativeorganiccontaminant.Compared
with polysulfonemembranessurface-modified withTiO2 and GO,respectively,theTiO2–GO membrane
exhibitedsignificantly improvedMBphotodegradationkineticsunderUV(about60–80% faster)and
sunlight (3–4 timesfaster).Besides,themembrane flux increasedasaresultofthephoto-enhanced
hydrophilicityandcontaminantdegradation.Therefore,surfacemodification byTiO2–GO grafting
providesaverypromisingroutetothefabricationofhigh-performancephotocatalyticmembranesfor
sustainable watertreatment.