Structural Modification of Pristine Graphene Network Towards Nanoporous Graphene Membrane: A Review

A single graphene layer is superior many ways preferably in electronic devices application. However, mild modification of the graphene network could open a new potential to the ultrathin graphene membrane. Moreover, recent studies demonstrated that a few simple techniques could generate and control the nanopores size on single layer graphene sheet simultaneously. This review paper will discuss all potential techniques that are capable to generate nanopores structure on the pristine single layer graphene network.

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High-permeance polymer-functionalized single-layer graphene membranes that surpass the postcombustion carbon capture target

Energy & Environmental Science ◽

10.1039/c9ee01238a ◽

2019 ◽

Vol 12 (11) ◽

pp. 3305-3312 ◽

Cited By ~ 23

Author(s):

Guangwei He ◽

Shiqi Huang ◽

Luis Francisco Villalobos ◽

Jing Zhao ◽

Mounir Mensi ◽

...

Keyword(s):

Carbon Capture ◽

Single Layer ◽

Single Layer Graphene ◽

Layer Graphene ◽

Graphene Membrane ◽

Nanoporous Graphene ◽

Graphene Membranes

A single-layer nanoporous graphene membrane functionalized with CO2-phillic polymers shows extremely fast, selective CO2 transport.

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Numerical Simulation of Salt Water Passing Mechanism Through Nanoporous Single-Layer Graphene Membrane

Chemical Product and Process Modeling ◽

10.1515/cppm-2015-0068 ◽

2016 ◽

Vol 11 (1) ◽

pp. 73-76 ◽

Cited By ~ 4

Author(s):

A. Chogani ◽

A. Moosavi ◽

M. Rahiminejad

Keyword(s):

Water Flow ◽

Sea Water ◽

Salt Water ◽

Applied Pressure ◽

Single Layer ◽

Hazardous Substances ◽

Single Layer Graphene ◽

Salt Rejection ◽

Layer Graphene ◽

Graphene Membrane

Abstract In recent years carbon nanotubes and other carbon nanostructures such as graphene sheets have attracted a lot of attention due to their unique mechanical, thermal and electrical properties. These structures can be used in desalination of sea water, removal of hazardous substances from water tanks, gases separation, and so on. The nanoporous single layer graphene membranes are very efficient for desalinating water due to their very low thickness. In this method, water-flow thorough the membrane and salt rejection strongly depend on the applied pressure and size of nanopores that are created in graphene membrane. In this study, the mechanism of passing water and salt ions through nanoporous single-layer graphene membrane are simulated using classical molecular dynamics. We examined the effects of applied pressure and size of nanopores on desalination performance of NPG membrane. Unlike previous researches, we considered the flexibility of the membrane. The results show that by increasing the applied pressure and diameter of the nanopores, water-flow through membrane increases, meanwhile salt rejection decreases.

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Transition from Metallic to Semiconducting Behavior in Oxygen Plasma-treated Single-layer Graphene

MRS Proceedings ◽

10.1557/opl.2011.1046 ◽

2011 ◽

Vol 1336 ◽

Author(s):

Amirhasan Nourbakhsh ◽

Mirco Cantoro ◽

Tom Vosch ◽

Geoffrey Pourtois ◽

Johan Hofkens ◽

...

Keyword(s):

Plasma Treatment ◽

Oxygen Plasma ◽

Treatment Time ◽

Single Layer ◽

Single Layer Graphene ◽

Oxygen Plasma Treatment ◽

Pristine Graphene ◽

Layer Graphene ◽

Epoxy Groups ◽

Semiconducting Behavior

ABSTRACTWe investigate the structural, optical and electrical properties of single-layer graphene exposed to oxygen plasma treatment. We find that the pristine semimetallic behavior of graphene disappears upon plasma treatment, in favour of the opening of a bandgap and the featuring of semiconducting properties. The metal-to-semiconductor transition observed appears to be dependent on the plasma treatment time. The semiconducting behavior is also confirmed by photoluminescence measurements. The opening of a bandgap in graphene is explained in terms of graphene surface functionalization with oxygen atoms, bonded as epoxy groups. Ab initio calculations of the density of states show more details about the oxygen–graphene interaction and its effects on the graphene optoelectronic properties, predicting no states near the Fermi level at increasing epoxy group density. The structural changes are also monitored by Raman spectroscopy, showing the progressive evolution of the sp2 character of pristine graphene to sp3, due to the lattice decoration with out-of-plane epoxy groups.

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