scholarly journals A novel surface cross-linked GO-based membrane with superior separation performance

RSC Advances ◽  
2017 ◽  
Vol 7 (85) ◽  
pp. 54213-54221 ◽  
Author(s):  
Zhen Qin ◽  
Lifang Wang ◽  
Wenzheng Zhang ◽  
Kai Pan
Keyword(s):  
Graphene Oxide ◽  
Composite Membrane ◽  
Water Permeability ◽  
High Performance ◽  
High Water ◽  
Separation Performance

In this study, a novel procedure of fabricating a high performance graphene oxide (GO) composite membrane with high water permeability and selectivity was developed.

scholarly journals Cross-Linking With Diamine Monomers to Prepare Graphene Oxide Composite Membranes With Varying D-Spacing for Enhanced Desalination Properties

2021 ◽  
Vol 9 ◽  
Author(s):  
Hong Ju ◽  
Jinzhuo Duan ◽  
Haitong Lu ◽  
Weihui Xu
Keyword(s):  
Graphene Oxide ◽  
Photoelectron Spectroscopy ◽  
Water Flux ◽  
Covalent Bond ◽  
Composite Membranes ◽  
Rejection Rate ◽  
High Water ◽  
Cross Linking ◽  
Separation Performance ◽  
X Ray

As a new type of membrane material, graphene oxide (GO) can easily form sub-nanometer interlayer channels, which can effectively screen salt ions. The composite membrane and structure with a high water flux and good ion rejection rate were compared by the cross-linking of GO with three different diamine monomers: ethylenediamine (EDA), urea (UR), and p-phenylenediamine (PPD). X-ray photoelectron spectroscopy (XPS) results showed that unmodified GO mainly comprises π-π interactions and hydrogen bonds, but after crosslinking with diamine, both GO and mixed cellulose (MCE) membranes are chemically bonded to the diamine. The GO-UR/MCE membrane achieved a water flux similar to the original GO membrane, while the water flux of GO-PPD/MCE and GO-EDA/MCE dropped. X-ray diffraction results demonstrated that the covalent bond between GO and diamine can effectively inhibit the extension of d-spacing during the transition between dry and wet states. The separation performance of the GO-UR/MCE membrane was the best. GO-PPD/MCE had the largest contact angle and the worst hydrophilicity, but its water flux was still greater than GO-EDA/MCE. This result indicated that the introduction of different functional groups during the diamine monomer cross-linking of GO caused some changes in the performance structure of the membrane.

scholarly journals Removal and Recovery of Methyl Tertiary Butyl Ether (MTBE) from Water Using Carbon Nanotube and Graphene Oxide Immobilized Membranes

Nanomaterials ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 578
Author(s):  
Worawit Intrchom ◽  
Sagar Roy ◽  
Somenath Mitra
Keyword(s):  
Graphene Oxide ◽  
Carbon Nanotube ◽  
High Performance ◽  
Water Solubility ◽  
High Water ◽  
Membrane Distillation ◽  
Methyl Tert Butyl Ether ◽  
Transfer Coefficients ◽  
Butyl Ether ◽  
Tertiary Butyl

Methyl tert-butyl ether (MTBE) is a widely used gasoline additive that has high water solubility, and is difficult to separate from contaminated ground and surface waters. We present the development in functionalized carbon nanotube-immobilized membranes (CNIM-f) and graphene oxide-immobilized membranes (GOIM) for enhanced separation of MTBE via sweep gas membrane distillation (SGMD). Both types of modified membranes demonstrated high performance in MTBE removal from its aqueous mixture. Among the membranes studied, CNIM-f provided the best performance in terms of flux, removal efficiency, mass transfer coefficients and overall selectivity. The immobilization f-CNTs and GO altered the surface characteristics of the membrane and enhanced partition coefficients, and thus assisted MTBE transport across the membrane. The MTBE flux reached as high as 1.4 kg/m2 h with f-CNTs, which was 22% higher than that of the unmodified PTFE membrane. The maximum MTBE removal using CNIM-f reached 56% at 0.5 wt % of the MTBE in water, and at a temperature of 30 °C. With selectivity as high as 60, MTBE recovery from contaminated water is very viable using these nanocarbon-immobilized membranes.

High performance graphene oxide/polyacrylonitrile composite pervaporation membranes for desalination applications

2015 ◽  
Vol 3 (9) ◽  
pp. 5140-5147 ◽  
Author(s):  
Bin Liang ◽  
Wu Zhan ◽  
Genggeng. Qi ◽  
Sensen Lin ◽  
Qian Nan ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Composite Membrane ◽  
High Performance

A GO/PAN pervaporation composite membrane was prepared and exhibited high desalination performance.

Tailoring the structure of polyamide thin film composite membrane with zwitterions to achieve high water permeability and antifouling property

RSC Advances ◽  
2015 ◽  
Vol 5 (120) ◽  
pp. 98730-98739 ◽  
Author(s):  
Xiaodan Weng ◽  
Yanli Ji ◽  
Fengyang Zhao ◽  
Quanfu An ◽  
Congjie Gao
Keyword(s):  
Thin Film ◽  
Protein Adsorption ◽  
Composite Membrane ◽  
Water Permeability ◽  
Interfacial Polymerization ◽  
Water Flux ◽  
High Water ◽  
Film Composite ◽  
Thin Film Composite Membrane ◽  
Thin Film Composite

Zwitterionic membranes prepared via interfacial polymerization directly exhibit remarkably high water flux (80.3 L m−2 h−1) and protein adsorption resistance.

scholarly journals A nanocomposite paper comprising calcium silicate hydrate nanosheets and cellulose nanofibers for high-performance water purification

RSC Advances ◽  
2020 ◽  
Vol 10 (51) ◽  
pp. 30304-30313
Author(s):  
Jie Li ◽  
Jingshu Zhang ◽  
Xuan Wu ◽  
Jiajun Zhao ◽  
Minjie Wu ◽  
...  
Keyword(s):  
Removal Efficiency ◽  
Water Purification ◽  
Water Permeability ◽  
Calcium Silicate ◽  
High Performance ◽  
Calcium Silicate Hydrate ◽  
Cellulose Nanofibers ◽  
High Water ◽  
Inorganic Contaminants

A nanocomposite paper with high water permeability and removal efficiency was prepared for the removal of organic and inorganic contaminants by filtration.

scholarly journals Relaxivity and toxicological properties of manganese oxide nanoparticles for MRI applications

RSC Advances ◽  
2016 ◽  
Vol 6 (51) ◽  
pp. 45462-45474 ◽  
Author(s):  
Benedict You Wei Hsu ◽  
Georgia Kirby ◽  
Aaron Tan ◽  
Alexander M. Seifalian ◽  
Xu Li ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Manganese Oxide ◽  
Water Permeability ◽  
High Performance ◽  
High Water ◽  
Oxide Nanoparticles ◽  
Resonance Imaging ◽  
Manganese Oxide Nanoparticles

Hollow MnO morphology and high water permeability of shell coating for high performance magnetic resonance imaging.

scholarly journals Molecular Dynamics Study of the Pore Formation in Single Layer Graphene Oxide by Thermal Reducing Process

2021 ◽  
Author(s):  
Federico Raffone ◽  
Filippo Savazzi ◽  
Giancarlo Cicero
Keyword(s):  
Molecular Dynamics ◽  
Graphene Oxide ◽  
Water Permeability ◽  
Pore Formation ◽  
Single Layer ◽  
High Water ◽  
Water Desalination ◽  
Single Layer Graphene ◽  
Layer Graphene ◽  
Nanoporous Graphene

Nanoporous graphene is considered the next generation material for reverse osmosis water desalination providing both high water permeability and almost complete salt rejection. The main problem with graphene is the...

scholarly journals Recent Advances in Graphene Oxide Membranes for Gas Separation Applications

2019 ◽  
Vol 20 (22) ◽  
pp. 5609 ◽  
Author(s):  
Saif Khan Alen ◽  
SungWoo Nam ◽  
Seyed A. Dastgheib
Keyword(s):  
Graphene Oxide ◽  
Gas Separation ◽  
High Performance ◽  
Separation Performance ◽  
Narrow Pore Size Distribution ◽  
Different Types ◽  
Oxide Membranes ◽  
Molecular Sieving ◽  
Gas Separation Performance ◽  
Graphene Oxide Membranes

Graphene oxide (GO) can dramatically enhance the gas separation performance of membrane technologies beyond the limits of conventional membrane materials in terms of both permeability and selectivity. Graphene oxide membranes can allow extremely high fluxes because of their ultimate thinness and unique layered structure. In addition, their high selectivity is due to the molecular sieving or diffusion effect resulting from their narrow pore size distribution or their unique surface chemistry. In the first part of this review, we briefly discuss different mechanisms of gas transport through membranes, with an emphasis on the proposed mechanisms for gas separation by GO membranes. In the second part, we review the methods for GO membrane preparation and characterization. In the third part, we provide a critical review of the literature on the application of different types of GO membranes for CO2, H2, and hydrocarbon separation. Finally, we provide recommendations for the development of high-performance GO membranes for gas separation applications.

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