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

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.

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...

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

Effect of physical and chemical structures of graphene oxide on water permeation in graphene oxide membranes

2020 ◽  
Vol 520 ◽  
pp. 146308 ◽  
Author(s):  
Lingling Zhang ◽  
Fangfang Dai ◽  
Ruobing Yi ◽  
Zhenglin He ◽  
Zhikun Wang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Water Permeation ◽  
Chemical Structures ◽  
Physical And Chemical ◽  
Oxide Membranes ◽  
Graphene Oxide Membranes

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...

Enhanced photo-driven ion pump through silver nanoparticles decorated graphene oxide membranes

Nano Research ◽  
2021 ◽  
Author(s):  
Yaping Feng ◽  
Haoyu Dai ◽  
Yi Zhang ◽  
Jianjun Chen ◽  
Fengxiang Chen ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Graphene Oxide ◽  
Ion Pump ◽  
Oxide Membranes ◽  
Graphene Oxide Membranes

Electrically Controlled Thermal Radiation from Reduced Graphene Oxide Membranes

2021 ◽  
Author(s):  
Zhaolong Chen ◽  
Kou Yang ◽  
Tongfeng Xian ◽  
Coskun Kocabas ◽  
Sergei V. Morozov ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Thermal Radiation ◽  
Reduced Graphene Oxide ◽  
Reduced Graphene ◽  
Oxide Membranes ◽  
Graphene Oxide Membranes
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