Journal ArticleDOI
Effect of graphene oxide concentration on the morphologies and antifouling properties of PVDF ultrafiltration membranes
TLDR
In this article, polyvinylidene fluoride (PVDF)/graphene oxide (GO) ultrafiltration (UF) membranes are prepared via immersion precipitation phase inversion process.Abstract:
Poly (vinylidene fluoride) (PVDF)/graphene oxide (GO) ultrafiltration (UF) membranes are prepared via immersion precipitation phase inversion process. Raman spectra results indicate the existence of GO in PVDF/GO UF membranes. SEM pictures show that the PVDF/GO UF membranes present developed finger-like pore substructure along with the increased porosity and mean pore size. As revealed by FT-IR spectra, large amount of OH groups are appeared due to the introduction of GO nanosheets that improve the surface hydrophilicity of the modified membrane. In permeation experiment, the water flux is improved after blending GO. With 2 wt% GO content, the pure water flux and permeation flux reach peak values of 26.49 L/m2 h and 14.21 L/m2 h, increasing 79% and 99% respectively. Furthermore, the flux recovery ratio (FRR) and the fouling resistance results suggest that PVDF/GO UF membranes have better antifouling properties than pure PVDF due to the changes of surface hydrophilicity and membrane morphologies. AFM images show that UF membranes have a smoother surface with a higher efficient filtration area, which would enhance antifouling properties.read more
Citations
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Journal ArticleDOI
Environmental applications of graphene-based nanomaterials.
TL;DR: This critical review assesses the recent developments in the use of graphene-based materials as sorbent or photocatalytic materials for environmental decontamination, as building blocks for next generation water treatment and desalination membranes, and as electrode materials for contaminant monitoring or removal.
Journal ArticleDOI
Preparation of a novel antifouling mixed matrix PES membrane by embedding graphene oxide nanoplates
TL;DR: In this article, a novel polyethersulfone (PES) mixed matrix nanofiltration membrane containing graphene oxide (GO) nanoplates was prepared via the phase inversion method.
Journal ArticleDOI
Graphene oxide-assisted membranes: Fabrication and potential applications in desalination and water purification
TL;DR: In this paper, a review of different fabrication and modification strategies for various innovative graphene oxide-assisted desalination membranes, including freestanding GO membranes, GO-surface modified membranes and casted GO-incorporated membranes, is presented.
Journal ArticleDOI
Graphene oxide modified polyamide nanofiltration membrane with improved flux and antifouling properties
TL;DR: Results indicate that incorporation of GO into a PA membrane can effectively enhance its hydrophilicity and consequently improve its flux and antifouling properties and provides an effective way to develop high performance NF membranes with greater stability.
Journal ArticleDOI
Preparation and characterization of graphene oxide/TiO2 blended PES nanofiltration membrane with improved antifouling and separation performance
TL;DR: In this paper, a polyethersulfone (PES)-based mixed matrix nanofiltration membrane was developed by blending with partially reduced graphene oxide (rGO)/TiO 2 nanocomposite.
References
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Journal ArticleDOI
Layer-by-Layer Assembly of Ultrathin Composite Films from Micron-Sized Graphite Oxide Sheets and Polycations
N. I. Kovtyukhova,Patricia J. Ollivier,Benjamin R. Martin,Thomas E. Mallouk,Sergey A. Chizhik,and Eugenia V. Buzaneva,Alexandr D. Gorchinskiy +6 more
TL;DR: In this article, unilamellar colloids of graphite oxide (GO) were prepared from natural graphite and were grown as monolayer and multilayer thin films on cationic surfaces by electrostatic self-assembly.
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Recent advances in graphene based polymer composites
TL;DR: In this paper, the structure, preparation and properties of polymer/graphene nanocomposites are discussed in general along with detailed examples drawn from the scientific literature, and the percolation threshold can be achieved at a very lower filler loading.
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Progress in the production and modification of PVDF membranes
TL;DR: A comprehensive overview of recent progress on the production and modification of polyvinylidene fluoride (PVDF) membranes for liquid-liquid or liquid-solid separation can be found in this article.
Journal ArticleDOI
Behaviours of natural organic matter in membrane filtration for surface water treatment — a review
TL;DR: In this article, the authors discuss natural organic matter (NOM) and its components as the major membrane fouants that occur during the water filtration process, possible fouling mechanisms relating to reversible and irreversible of NOM fouling, current techniques used to characterize fouling mechanism and methods to control fouling.