Abstract
Graphene oxide (GO)-based membranes provide an encouraging opportunity for oil-in-water emulsion separation with high separation efficiency. In this work, novel hierarchically structured membrane consisting of GO and halloysite nanotubes (HNTs) was successfully fabricated by vacuum-assisted filtration method. XRD and TEM measurements showed the successful intercalation of HNTs into the interlayers of GO nanosheets. With the incorporation of the one-dimensional hollow tubular structure halloysite nanotubes, GO-HNTs(GOH) membrane possessed combined advantages of high oil rejection rate and excellent fouling resistance properties. The permeate fluxes increased from 286.6 L/(m2·h) for GO membrane to 716 L/(m2·h) for GOH membrane. The results indicate that the GOH membranes have great potential applications in water purification and wastewater treatment.
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