As　a　new　type　of　filler　for　nanohybrid　membranes,　metal　organic　frameworks　(MOFs)　have　attracted　intense　interest　in　recent　years.　In　this　work,　MOF-based　Cu-3(BTC)(2)/PVA　(BTC=benzene-1,3,5-tricarboxylate,　PVA=poly(vinyl　alcohol))　nanohybrid　membranes　were　fabricated　on　a　ceramic　tubular　substrate　by　using　a　pressure-driven　assembly　method.　The　morphology　and　structure　of　the　resulting　membranes　were　characterized　by　scanning　electron　microscope,　energy　dispersive　X-ray　spectrometer,　and　powder　Xray　diffraction.　The　Cu3(BTC)2/PVA　membranes　were　then　used　in　separating　50　wt%　toluene/n-heptane　mixtures　through　pervaporation.　The　effects　of　PVA　concentration,　Cu-3(BTC)(2)　loading,　teed　composition,　and　operating　temperature　on　membrane　performances　were　explored.　The　results　indicate　that,　compared　with　pristine　PVA　membrane,　the　separation　factor　and　permeate　flux　of　optimized　Cu-3(BTC)(2)/PVA　membranes　are　improved　from　8.9　and　14　g/(m(2)　h)　to　17.9　and　133　g/(m(2)　h),　respectively.　A　speculation　of　the　transport　process　of　permeating　components　in　the　selective　layer　of　Cu-3(BTC)(2)/PVA　membrane　was　proposed.　Enhanced　affinity　between　toluene　and　the　membrane　through　incorporating　Cu-3(BTC)(2)　particles　plays　a　key　role　in　improving　separation　performances.　(C)　2015　Elsevier　BM.　All　rights　reserved.