Relationship between Desalination Performance of Graphene Oxide Membranes and Edge Functional Groups

2019 ◽  
Vol 12 (4) ◽  
pp. 4769-4776 ◽  
Author(s):  
Ruosang Qiu ◽  
Jie Xiao ◽  
Xiao Dong Chen ◽  
Cordelia Selomulya ◽  
Xiwang Zhang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Functional Groups ◽  
Oxide Membranes ◽  
Graphene Oxide Membranes

Effects of Edge Functional Groups on Water Transport in Graphene Oxide Membranes

2019 ◽  
Vol 11 (8) ◽  
pp. 8483-8491 ◽  
Author(s):  
Ruosang Qiu ◽  
Shi Yuan ◽  
Jie Xiao ◽  
Xiao Dong Chen ◽  
Cordelia Selomulya ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Functional Groups ◽  
Water Transport ◽  
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.

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

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

pH-Mediated fine-tuning of optical properties of graphene oxide membranes

Carbon ◽  
2012 ◽  
Vol 50 (9) ◽  
pp. 3233-3239 ◽  
Author(s):  
Wei Lv ◽  
Cong-Hui You ◽  
Sida Wu ◽  
Baohua Li ◽  
Zhen-Ping Zhu ◽  
...  
Keyword(s):  
Optical Properties ◽  
Graphene Oxide ◽  
Fine Tuning ◽  
Oxide Membranes ◽  
Graphene Oxide Membranes

scholarly journals Aptamer-Conjugated Graphene Oxide Membranes for Highly Efficient Capture and Accurate Identification of Multiple Types of Circulating Tumor Cells

2015 ◽  
Vol 26 (2) ◽  
pp. 235-242 ◽  
Author(s):  
Bhanu Priya Viraka Nellore ◽  
Rajashekhar Kanchanapally ◽  
Avijit Pramanik ◽  
Sudarson Sekhar Sinha ◽  
Suhash Reddy Chavva ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Tumor Cells ◽  
Circulating Tumor Cells ◽  
Accurate Identification ◽  
Highly Efficient ◽  
Oxide Membranes ◽  
Graphene Oxide Membranes

Thermal reduction to control the spacing in graphene oxide membranes: effect on ion diffusion and electrical conduction

RSC Advances ◽  
2016 ◽  
Vol 6 (74) ◽  
pp. 70012-70017 ◽  
Author(s):  
A. Alhadhrami ◽  
S. Salgado ◽  
V. Maheshwari
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Electrical Conduction ◽  
Thermal Reduction ◽  
Electrochemical Characteristics ◽  
Ion Diffusion ◽  
Layer Spacing ◽  
Reduced Graphene ◽  
Oxide Membranes ◽  
Graphene Oxide Membranes

Inter-layer spacing in reduced graphene-oxide membranes which modulates their ion-diffusion electrical and electrochemical characteristics is controlled by temperature of thermal reduction.

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