Graphene　oxide　quantum　dots　(GOQDs),　a　carbon-based　nanomaterial　resembling　the　structure　of　graphene　oxide　but　with　a　smaller　size　of　＜　100　nm,　was　incorporated　in　a　poly(vinyl　alcohol)　(PVA)　dense　selective　layer　supported　on　a　polysulfone　substrate　to　prepare　a　composite　hybrid　pervaporation　(PV)　membrane　for　alcohol　dehydration.　The　addition　of　GOQDs　into　the　PVA　polymer　matrix　provided　a　tortuous　path　for　the　permeating　molecules　but　augments　the　separation　efficiency　of　the　membrane.　The　presence　of　hydroxyl　and　carboxyl　groups　on　the　confined　nanosize　of　GOQDs　sheets　attract　the　polar　groups　of　the　permeants　within　the　polymer　matrix.　The　physicochemical　properties　of　the　membrane　were　characterized.　An　interesting　observation　was　found　when　the　membranes　with　GOQD　(PVAx-GOQD300)　were　tested　for　aqueous　propanol　isomers　mixture,　isopropanol　(i-PrOH)　and　n-propanol　(n-PrOH).　The　PVAx-GOQD300　membrane　showed　lower　separation　performance　for　linear　alcohol　compared　with　the　sterically　hindered　alcohol.　Positron　annihilation　lifetime　spectroscopy　(PALS)　results　revealed　that　membranes　integrated　with　GOQD　behaved　differently　in　both　propanol　isomers.　The　PVAx-GOQD300　membrane　showed　larger　free　volume　size　in　n-PrOH/water　than　i-PrOH/water　mixtures　while　there　was　not　much　difference　in　the　absence　of　GOQDs.　PALS　results　justified　the　low　separation　of　the　membrane　with　linear　alcohol/water　mixtures.　Furthermore,　the　long　operating　time,　high　operating　temperature,　and　high　water　content　in　feed　shows　the　potential　stability　of　the　membrane　for　practical　application.