A porous graphene composite membrane intercalated by halloysite nanotubes for efficient dye desalination
MetadataShow full item record
© 2017 Elsevier B.V. Porous reduced graphene oxide (PRGO) was obtained by making pores on graphene oxide layers. Halloysite nanotubes, modified by Poly (sodium-p-styrenesulfonate) (PSS), were used to enlarge the interlayer spacing of PRGO. These two materials were immobilized on membrane surface through a time-saving, facile solvent evaporation method. The sandwich structure, formed through solvent evaporation process, provided additionally continuous pathway for water and salts, thus improving the water permeability of the composite membranes. Comprehensive characterizations of the materials were characterized by FT-IR, TEM, Raman, EDS and XRD. The composite membranes were characterized by SEM, FT-IR and EDS. The composite membranes exhibited a higher separation effect for salts and dye (i.e. 4.7% for MgSO4, 4.7% for MgCl2, 6.8% for NaCl, and 14.3% for Na2SO4; up to 97.9% for Reactive Black 5). The pure water permeation of composite membranes could reach as high as 8.8 L/(m2h bar). Hence, the graphene-based hybrid membranes presented a potential application in separation for salts and dyes.
Showing items related by title, author, creator and subject.
Graphene immobilized enzyme/polyethersulfone mixed matrix membrane: Enhanced antibacterial, permeable and mechanical propertiesDuan, L.; Wang, Y.; Zhang, Y.; Liu, Jian (2015)© 2015 Elsevier B.V. All rights reserved. Enzyme immobilization has been developed to address lots of issues of free enzyme, such as instability, low activity and difficult to retain. In this study, graphene was used as ...
Zhu, J.; Tian, M.; Hou, J.; Wang, J.; Lin, J.; Zhang, Y.; Liu, Jian; Van Der Bruggen, B. (2016)© The Royal Society of Chemistry 2016. Surface zwitterionization of graphene oxide (GO) was firstly conducted by grafting poly(sulfobetaine methacrylate) (PSBMA) onto the GO surface via reverse atom transfer radical ...
Hydrotalcite/graphene oxide hybrid nanosheets functionalized nanofiltration membrane for desalinationWang, X.; Wang, H.; Wang, Y.; Gao, J.; Liu, Jian; Zhang, Y. (2017)© 2017 Elsevier B.V. An exfoliated hydrotalcite/graphene oxide (EHT/GO) hybrid nanosheet was synthesized via flocculation deposition and could be uniformly dispersed in PEI solution to be used as aqueous phase for interfacial ...