Ultrahigh water permeance of a reduced graphene oxide nanofiltration membrane for multivalent metal ion rejection
Fangfang Dai, Risheng Yu, Ruobing Yi, Jian Lan, Rujie Yang, Zhikun Wang, Junlang Chen, Liang Chen
Abstract
We develop a kind of pure rGO membrane using amino-hydrothermal reduction that exhibits an ultrahigh water permeance of 142.5 L m-2 h-1 bar-1 while still maintaining a high rejection rate of 91.6% for multivalent metal ions. The prepared rGO membranes have two types of spacing: larger hydrophilic spacing and smaller hydrophobic spacing, resulting in superior filtration performance. This provides a new avenue for multivalent metal ion separation using pure rGO membranes.
Topics & Concepts
PermeanceNanofiltrationOxideMembraneGrapheneMetalMaterials scienceMetal ions in aqueous solutionChemical engineeringIonNanotechnologyChemistryMetallurgyOrganic chemistryPermeationEngineeringBiochemistryMembrane Separation TechnologiesMembrane-based Ion Separation TechniquesAdvancements in Battery Materials