Topics

Reduced Holey Graphene Oxide Membranes for Desalination with Improved Water Permeance.

07:00 EST 13th December 2019 | BioPortfolio

Summary of "Reduced Holey Graphene Oxide Membranes for Desalination with Improved Water Permeance."

Reduced-graphene oxide (r-GO) membranes with narrow channels exhibit salt rejections comparable to conventional nanofiltration (NF) membranes. However, their water permeances are much lower because of the high tortuosity for water permeation. Herein we report a facile solution-processable approach to create in-plane nanopores on GO nanosheets before reduction, dramatically decreasing the tortuosity and increasing water permeance while retaining the salt rejection. Specifically, holey GO (HGO) nanosheets were prepared via chemical etching using hydrogen peroxide, followed by the deposition on a porous support by vacuum filtration and then reduction via exposure to hydriodic acid solutions to generate the reduced HGO (r-HGO) membrane. The generation of nanopores increases the water permeance from 0.4 L m-2∙h-1∙bar-1 (LMH/bar) to 6.6 LMH/bar with Na2SO4 rejection greater than 98.5 %, and the membranes were robust under strong cross-flow shearing force for 36 h. Both water permeance and Na2SO4 rejection of these r-HGO membranes for the first time simultaneously reach the level of the commercial polyamide-based NF membranes. Given their good antibacterial properties and resistance to aggressive chemical washing, the r-HGO membranes show the promise as next-generation NF membranes for desalination.

Affiliation

Journal Details

This article was published in the following journal.

Name: ACS applied materials & interfaces
ISSN: 1944-8252
Pages:

Links

DeepDyve research library

PubMed Articles [12967 Associated PubMed Articles listed on BioPortfolio]

Mixed Nanosheet Membranes Assembled from Chemically Grafted Graphene Oxide and Covalent Organic Frameworks for Ultra-High Water Flux.

2D Graphene oxide (GO) membranes attract great attention due to ultrathin thickness and superior molecular sieving ability, but the low flux and instability in aqueous environments remain the major ch...

Preparation of a hydrophilic and antibacterial dual function ultrafiltration membrane with quaternized graphene oxide as a modifier.

In order to improve the anti-biofouling performance of ultrafiltration membrane, quaternized graphene oxide (QGO) was synthesized as a membrane modifier by in-situ growth of quaternary ammonium salt o...

Enhanced antifouling performance of PVDF ultrafiltration membrane by blending zinc oxide with support of graphene oxide nanoparticle.

This paper reports a novel nanocomposite additive for a polyvinylidene fluoride (PVDF) membrane with high hydrophilicity through the association of graphene oxide (GO) and ZnO. The influence of the hy...

Improved photoelectrocatalytic degradation of tetrabromobisphenol A with silver and reduced graphene oxide-modified TiO nanotube arrays under simulated sunlight.

In present study, reductive graphene oxide and silver nanoparticles co-comodified TiO nanotube arrays were prepared, and which was investigated to degrade tetrabromobisphenol A. The arrays co-modified...

Laminar Graphene Oxide Membranes Towards Selective Ionic and Molecular Separations: Challenges and Progress.

Resolution of resources and environmental crises requires an efficient separation technologies, consequently, scientists and engineers are working vigorously for ideal separation materials. Laminar gr...

Clinical Trials [4763 Associated Clinical Trials listed on BioPortfolio]

PRO-MComplete for Determination of Rupture of Fetal Membranes

Premature rupture of membranes refers to the rupture of the fetal membranes prior to the onset of labor. Premature rupture of membranes is associated with a number of neonatal and maternal...

The Role of Eicosanoids in the Cardiovascular Actions of Inhaled Nanoparticles

Nanoparticles (NPs) are minute pieces of material to which we are exposed every day in the air we breathe. Some are naturally occurring and have no impact on health, whereas others are pro...

Follow-up at School-Age of Children Who Participated in the Efficacy Study of Nitric Oxide for Premature Infants

Our previous data demonstrated that premature infants treated with inhaled nitric oxide at birth had improved neurodevelopmental outcomes at two years corrected age. We now wish to determi...

Switching to Low Oxidant Content Cigarettes in Adult Smokers

The overall objective of this clinical study is to determine if smokers who switch from their usual high reactive oxygen and nitrous oxide species (ROS/NOS) products to a low ROS/NOS produ...

Azithromycin for Preterm Pre-labor Rupture of Membranes

The preterm prelabour rupture of membranes is defined as the spontaneous rupture of the fetal membranes before 37 completed weeks. Preterm prelabour rupture of membranes complicates up to ...

Medical and Biotech [MESH] Definitions

Radiotherapy where there is improved dose homogeneity within the tumor and reduced dosage to uninvolved structures. The precise shaping of dose distribution is achieved via the use of computer-controlled multileaf collimators.

Demographic and epidemiologic changes that have occurred in the last five decades in many developing countries and that are characterized by major growth in the number and proportion of middle-aged and elderly persons and in the frequency of the diseases that occur in these age groups. The health transition is the result of efforts to improve maternal and child health via primary care and outreach services and such efforts have been responsible for a decrease in the birth rate; reduced maternal mortality; improved preventive services; reduced infant mortality, and the increased life expectancy that defines the transition. (From Ann Intern Med 1992 Mar 15;116(6):499-504)

Artificially produced membranes, such as semipermeable membranes used in artificial kidney dialysis (RENAL DIALYSIS), monomolecular and bimolecular membranes used as models to simulate biological CELL MEMBRANES. These membranes are also used in the process of GUIDED TISSUE REGENERATION.

A free radical gas produced endogenously by a variety of mammalian cells, synthesized from ARGININE by NITRIC OXIDE SYNTHASE. Nitric oxide is one of the ENDOTHELIUM-DEPENDENT RELAXING FACTORS released by the vascular endothelium and mediates VASODILATION. It also inhibits platelet aggregation, induces disaggregation of aggregated platelets, and inhibits platelet adhesion to the vascular endothelium. Nitric oxide activates cytosolic GUANYLATE CYCLASE and thus elevates intracellular levels of CYCLIC GMP.

A potent mutagen and carcinogen. This compound and its metabolite 4-HYDROXYAMINOQUINOLINE-1-OXIDE bind to nucleic acids. It inactivates bacteria but not bacteriophage.

Quick Search


DeepDyve research library

Searches Linking to this Article