Ultrahigh water permeation with high multivalent metal ions rejection rate through graphene oxide membranes

2021 ◽  
Author(s):  
Fangfang Dai ◽  
Feng Zhou ◽  
Junlang Chen ◽  
Shanshan Liang ◽  
Liang Chen ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Graphene Oxide ◽  
Metal Ions ◽  
Rejection Rate ◽  
Water Permeation ◽  
Oxide Membranes ◽  
Permeation Properties ◽  
Multivalent Metal ◽  
Graphene Oxide Membranes

Graphene oxide (GO) membranes show exceptional molecular permeation properties and have gained tremendous attention in the area of wastewater treatment. However, they still suffer from some limitations, such as low...

Ultrahigh water permeation with high multivalent metal ions rejection rate through graphene oxide membranes

2020 ◽  
Author(s):  
Fangfang Dai ◽  
Feng Zhou ◽  
Junlang Chen ◽  
Shanshan Liang ◽  
Liang Chen ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Metal Ions ◽  
Rejection Rate ◽  
Permeable Membrane ◽  
Water Permeation ◽  
Satisfactory Level ◽  
Time Operation ◽  
High Rejection Rate ◽  
Multivalent Metal ◽  
Water Permeance

Abstract Graphene oxide (GO) membranes show exceptional molecular permeation properties and have gained tremendous attention in the area of wastewater treatment. However, they still suffer from some limitations, such as low water permeance when the ion rejection rate is at a satisfactory level and unstable performance. Here, we develop a sort of GO membrane that exhibits ultrahigh water permeance up to 75.2 L m−2 h−1 bar−1 while still maintaining a high rejection rate of 99.9% for multivalent metal ions. Importantly, of all state-of-the-art nanofiltration membranes, this is the most permeable membrane with a satisfactory level of rejection rate for multivalent ions. Furthermore, the GO membrane has outstanding stability over long-time operation. Our work provides a simple way to fabricate GO membranes with outstanding water purification performance.

Layered graphene oxide membranes functioned by amino acids for efficient separation of metal ions

2021 ◽  
Vol 546 ◽  
pp. 149145
Author(s):  
Bo Zheng ◽  
Xianxian Chu ◽  
Han Li ◽  
Xiuli Wu ◽  
Xin Zhao ◽  
...  
Keyword(s):  
Amino Acids ◽  
Graphene Oxide ◽  
Metal Ions ◽  
Separation Of Metal Ions ◽  
Efficient Separation ◽  
Oxide Membranes ◽  
Graphene Oxide Membranes

scholarly journals Water/Alcohol Separation in Graphene Oxide Membranes: Insights from Molecular Dynamics and Monte Carlo Simulations

MRS Advances ◽  
2018 ◽  
Vol 3 (1-2) ◽  
pp. 109-114 ◽  
Author(s):  
Daiane Damasceno Borges ◽  
Cristiano F. Woellner ◽  
Pedro A. S. Autreto ◽  
Douglas S. Galvao
Keyword(s):  
Molecular Dynamics ◽  
Graphene Oxide ◽  
Functional Groups ◽  
Water Molecules ◽  
Pristine Graphene ◽  
Strong Impact ◽  
Water Permeation ◽  
Oxide Membranes ◽  
Graphene Oxide Membranes ◽  
Water Alcohol

ABSTRACTGraphene-based membranes have been investigated as promising candidates for water filtration and gas separation applications. Experimental evidences have shown that graphene oxide can be impermeable to liquids, vapors and gases, while allowing a fast permeation of water molecules. This phenomenon has been attributed to the formation of a network of nano capillaries that allow nearly frictionless water flow while blocking other molecules by steric hindrance effects. It is supposed that water molecules are transported through the percolated two-dimensional channels formed between graphene-based sheets. Although these channels allow fast water permeation in such materials, the flow rates are strongly dependent on how the membranes are fabricated. Also, some fundamental issues regarding the nanoscale mechanisms of water permeation are still not fully understood and their interpretation remains controversial. In this work, we have investigated the dynamics of water permeation through pristine graphene and graphene oxide model membranes that have strong impact on water/alcohol separation. We have carried out fully atomistic classical molecular dynamics simulations of systems composed of multiple layered graphene-based sheets into contact with a pure water reservoir under controlled thermodynamics conditions (e. g., by varying temperature and pressure values). We have systematically analysed how the transport dynamics of the confined nanofluids depend on the interlayer distances and the role of the oxide functional groups. Our results show the water flux is much more effective for graphene than for graphene oxide membranes. These results can be attributed to the H-bonds formation between oxide functional groups and water, which traps the water molecules and precludes ultrafast water transport through the nanochannels.

scholarly journals Understanding Water Permeation in Graphene Oxide Membranes

2014 ◽  
Vol 6 (8) ◽  
pp. 5877-5883 ◽  
Author(s):  
Ning Wei ◽  
Xinsheng Peng ◽  
Zhiping Xu
Keyword(s):  
Graphene Oxide ◽  
Water Permeation ◽  
Oxide Membranes ◽  
Graphene Oxide Membranes

Ultrapermeable graphene oxide membranes with tunable interlayer distances via vein-like supramolecular dendrimers

2019 ◽  
Vol 7 (31) ◽  
pp. 18642-18652 ◽  
Author(s):  
Yimeng Song ◽  
Run Li ◽  
Fusheng Pan ◽  
Ze He ◽  
Hao Yang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Water Permeation ◽  
Supramolecular Dendrimers ◽  
Oxide Membranes ◽  
Graphene Oxide Membranes

Graphene oxide membranes with tunable interlayer distances by using vein-like supramolecular dendrimers as crosslinkers for ultrafast and selective water permeation.

scholarly journals Electrically controlled water permeation through graphene oxide membranes

Nature ◽  
2018 ◽  
Vol 559 (7713) ◽  
pp. 236-240 ◽  
Author(s):  
K.-G. Zhou ◽  
K. S. Vasu ◽  
C. T. Cherian ◽  
M. Neek-Amal ◽  
J. C. Zhang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Water Permeation ◽  
Oxide Membranes ◽  
Graphene Oxide Membranes

Heterostructured graphene oxide membranes with tunable water-capture coatings for highly selective water permeation

2021 ◽  
Author(s):  
Zhiming Zhang ◽  
Hong Wu ◽  
Ying Li ◽  
Yue Liu ◽  
Chenliang Cao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Water Transport ◽  
Great Promise ◽  
Separation Performance ◽  
Water Permeation ◽  
Membrane Surfaces ◽  
Molecular Separations ◽  
Oxide Membranes ◽  
Graphene Oxide Membranes

Graphene oxide (GO) laminar membranes with fast water-transport nanochannels hold great promise for water-selective molecular separations, but the water-capture ability of membrane surfaces limits the separation performance. Herein, we engineered...

Ion beam engineered graphene oxide membranes for mono-/di-valent metal ions separation

Carbon ◽  
2020 ◽  
Vol 158 ◽  
pp. 598-606 ◽  
Author(s):  
Yibin Wei ◽  
Zeljko Pastuovic ◽  
Chao Shen ◽  
Timothy Murphy ◽  
Damian B. Gore
Keyword(s):  
Graphene Oxide ◽  
Metal Ions ◽  
Ion Beam ◽  
Oxide Membranes ◽  
Graphene Oxide Membranes

Metal-cation-modified graphene oxide membranes for water permeation

Carbon ◽  
2020 ◽  
Vol 170 ◽  
pp. 646-657
Author(s):  
Karin Ching ◽  
Boyue Lian ◽  
Greg Leslie ◽  
Xianjue Chen ◽  
Chuan Zhao
Keyword(s):  
Graphene Oxide ◽  
Metal Cation ◽  
Water Permeation ◽  
Modified Graphene Oxide ◽  
Modified Graphene ◽  
Oxide Membranes ◽  
Graphene Oxide Membranes
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