Graphene oxide membranes with narrow inter-sheet galleries for enhanced hydrogen separation

Ibrahim, Amr F. M.; Banihashemi, Fateme; Lin, Jerry Y S

doi:10.1039/c8cc10283j

Cited by 35 publications

(14 citation statements)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Apparently, the main mechanism for large molecules (CH 4 , N 2 , and CO 2 ) is Knudsen diffusion, since the interlayer distance is rather large. This is confirmed by experimental datathe permeability of these gases is inversely proportional to the square root of the molecular weight [89,90,92]. However, the substantially higher permeability for hydrogen and helium indicates that another path contributes additionally.…”

Section: Graphene-based Membranes For the Purification And Concentratsupporting

confidence: 72%

“…Owing to its unique thin-layered structure and the presence of functional groups, membranes based on graphene oxide (GO membranes) can also provide high permeability and selectivity and can be used in practice for hydrogen purification or hydrogen evolution [66,67,73,79,[86][87][88][89][90][91][92][93]. The homogeneous layered structures required to form membranes can be obtained from dispersions of GO flakes by dip coating, vacuum filtration, spray coating, layer-by-layer deposition, and other methods.…”

Section: Graphene-based Membranes For the Purification And Concentratmentioning

confidence: 99%

See 1 more Smart Citation

Graphene and Graphene-Like Materials for Hydrogen Energy

et al. 2020

View full text Add to dashboard Cite

The review is devoted to current and promising areas of application of graphene and materials based on it for generating environmentally friendly hydrogen energy. Analysis of the results of theoretical and experimental studies of hydrogen accumulation in graphene materials confirms the possibility of creating on their basis systems for reversible hydrogen storage, which combine high capacity, stability, and the possibility of rapid hydrogen evolution under conditions acceptable for practical use. Recent advances in the development of chemically and heat-resistant graphene-based membrane materials make it possible to create new gas separation membranes that provide high permeability and selectivity and are promising for hydrogen purification in processes of its production from natural gas. The characteristics of polymer membranes that are currently used in industry for the most part can be significantly improved with small additions of graphene materials. The use of graphene-like materials as a support of nanoparticles or as functional additives in the composition of the electrocatalytic layer in polymer electrolyte membrane fuel cells makes it possible to improve their characteristics and to increase the activity and stability of the electrocatalyst in the reaction of oxygen evolution.

show abstract

Section: Graphene-based Membranes For the Purification And Concentratsupporting

confidence: 72%

Section: Graphene-based Membranes For the Purification And Concentratmentioning

confidence: 99%

Graphene and Graphene-Like Materials for Hydrogen Energy

et al. 2020

View full text Add to dashboard Cite

show abstract

“…It has been proposed that the interlayer spaces of GONs are the main channels for the transport of both gas and liquid molecules in GO membranes. [10] Meanwhile,t he good me- (3.5 6.0 ). b) MOF structure viewed along b axis highlighting the nonporous wall of the 1D channels along a axis.…”

Section: Resultsmentioning

confidence: 99%

Pressure‐Responsive Two‐Dimensional Metal–Organic Framework Composite Membranes for CO₂ Separation

et al. 2021

View full text Add to dashboard Cite

The regulation of permeance and selectivity in membrane systems may allow effective relief of conventional energy-intensive separations.H ere,p ressure-responsive ultrathin membranes ( % 100 nm) fabricated by compositing flexible two-dimensional metal-organic framework nanosheets (MONs) with graphene oxide nanosheets for CO 2 separation are reported. By controlling the gas permeation direction to leverage the pressure-responsive phase transition of the MONs, CO 2 -induced gate opening and closing behaviors are observed in the resultant membranes,w hich are accompanied with the sharp increase of CO 2 permeance (from 173.8 to 1144 gas permeation units) as well as CO 2 /N 2 and CO 2 /CH 4 selectivities (from 4.1 to 22.8 and from 4to19.6, respectively). The flexible behaviors and separation mechanism are further elucidated by molecular dynamics simulations.T his work establishes the relevance of structural transformation-based framework dynamics chemistry in smart membrane systems.

show abstract

“…It was observed that GO-B membranes can be fabricated with a much smaller interlayer spacing (6.0 Å) in comparison to GO-H, leading to more effective molecular sieving. From the gas permeation testing [ 98 ], the increases in H 2 /CO 2 , H 2 /N 2 and H 2 /CH 4 selectivities by 129%, 91% and 76%, respectively, were reported when GO-B was employed in the membrane fabrication instead of GO-H. However, it should be noted that this synthesis protocol is more complicated and tedious as compared to the Hummer’s method, since repetitive graphite oxidation is required (typically about three ~ four times) to obtain the desired product (C/O ratio > 2).…”

Section: Performance Of a Graphene-based Membranementioning

confidence: 99%

Graphene-based Membranes for H2 Separation: Recent Progress and Future Perspective

2020

View full text Add to dashboard Cite

Hydrogen (H2) is an industrial gas that has showcased its importance in several well-known processes such as ammonia, methanol and steel productions, as well as in petrochemical industries. Besides, there is a growing interest in H2 production and purification owing to the global efforts to minimize the emission of greenhouse gases. Nevertheless, H2 which is produced synthetically is expected to contain other impurities and unreacted substituents (e.g., carbon dioxide, CO2; nitrogen, N2 and methane, CH4), such that subsequent purification steps are typically required for practical applications. In this context, membrane-based separation has attracted a vast amount of interest due to its desirable advantages over conventional separation processes, such as the ease of operation, low energy consumption and small plant footprint. Efforts have also been made for the development of high-performance membranes that can overcome the limitations of conventional polymer membranes. In particular, the studies on graphene-based membranes have been actively conducted most recently, showcasing outstanding H2-separation performances. This review focuses on the recent progress and potential challenges in graphene-based membranes for H2 purification.

show abstract

Graphene oxide membranes with narrow inter-sheet galleries for enhanced hydrogen separation

Cited by 35 publications

References 21 publications

Graphene and Graphene-Like Materials for Hydrogen Energy

Graphene and Graphene-Like Materials for Hydrogen Energy

Pressure‐Responsive Two‐Dimensional Metal–Organic Framework Composite Membranes for CO₂ Separation

Graphene-based Membranes for H2 Separation: Recent Progress and Future Perspective

Contact Info

Product

Resources

About

Graphene oxide membranes with narrow inter-sheet galleries for enhanced hydrogen separation

Cited by 35 publications

References 21 publications

Graphene and Graphene-Like Materials for Hydrogen Energy

Graphene and Graphene-Like Materials for Hydrogen Energy

Pressure‐Responsive Two‐Dimensional Metal–Organic Framework Composite Membranes for CO2 Separation

Graphene-based Membranes for H2 Separation: Recent Progress and Future Perspective

Contact Info

Product

Resources

About

Pressure‐Responsive Two‐Dimensional Metal–Organic Framework Composite Membranes for CO₂ Separation