Abstract
Despite the great potential for application of graphene oxide (GO) membranes, their water instability and disintegration may result in their structure collapse due to the electrostatic repulsion of the negative charges of the hydrated GO nanosheets. Also, tuning of GO nanosheets’ interlayer spacing and creation of adequate channels to enhance their membranes permeation flux is still another challenging issue. In this study, GO nanosheets were successfully intercalated by synthesized metal–organic frameworks of MOF-303. Some bare GO and composite MOF-303@GO membranes were prepared by coating on modified ceramic supports. The prepared materials and membranes were analyzed by FTIR, XRD, contact angle, DLS, and SEM analysis. The outcomes confirmed the successful of MOF-303 and MOF-303@GO composite preparation and their composite membranes. Based on the composite membranes long-term performance, not only a stable membrane structure was obtained, but also considerable higher ethanol dehydration performance was obtained due to the bonding between the carboxylate groups on GO nanosheets and MOF particles. The MOF-303@GO PV membranes exhibited a considerable enhancement in both their permeation flux and separation factor for ethanol dehydration. The optimum composite membrane’s permeation flux and separation factor were obtained at 25 % MOF loading of composite MOF-303@GO PV membrane at 298 K as 3.15 kg/m2.h and 320, respectively, reveals 1.5- and 2.28-fold improvement as compared with those of the pristine GO membrane.
Published Version
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