Simultaneously Improvement of Water Flux and Salt Rejection of GrapheneOxide-based Membranes Prepared by Pressure-Assisted Self-AssemblyTechnique

Graphene oxide (GO) and sulfonated graphene oxide (SGO) membranes with different content ofnanoparticle (NP)were prepared by pressure-assisted self-assembly technique. Water contact angle,d-spacing between nanosheets, morphology, surface roughness, pure water flux (PWF) and saltrejection of the membranes was investigated. The presence of sulfonic acid groups on SGO NPs,caused to the higher hydrophilicity and larger d-spacing of the SGO membrane. This led to the higherPWF and more salt rejection of SGO membrane, compared to GO membrane. Manipulation of theNPs content and, also modification of the GO sheets by ionic functional groups allows simultaneouslyimprovement of PWF and salt rejection of the membranes.

کلیدواژه ها:

Membranes ، Graphene oxide ، flux ، rejection ، interlayer spacing