Oxidized Carbon-Based Spacers for Pressure-Resistant Graphene Oxide Membranes

Abstract

In this study, we report the influence of carbon-based spacer-oxidized derivatives of fullerenes (fullerenols) C60(OH)26–32 and graphene oxide nanoribbons on the performance and pressure stability of graphene-oxide-based composite membranes. The impact of the intercalant shape and composition on the permeance of the selective layers for water vapors has been studied under pressure gradients. It is shown that the insertion of ball-shaped fullerenols between graphene oxide nanoflakes allows a suppression in irreversible permeance loss to 2–4.5% and reversible permeance loss to <25% (at 0.1 MPa), while retaining large H2O/N2 selectivities of up to ~30,000. The demonstrated approach opens avenues for the highly effective stabilization of GO membranes at elevated pressures for industrial-scale dehumidification.

Deciphering the role of 2D graphene oxide nanofillers in polymer membranes for vanadium redox flow batteries

“…Thus, the modication of the asymmetrical convergent model of GO can effectively transfer the protons. 154 Recently, the proton transportation and H + /H 2 O selectivity of electrochemically reduced GO has been examined by Chernova et al 155 Permeation mechanism by electrochemically reduced graphene oxide membrane. Water vapour permeance, the permeance of different gases, gas selectivity, and H 2 O/N 2 selectivity on GO are represented in Fig.…”

“…Therefore, a greater amount of proton transport performances via GO has been observed as compared to the other species. 155 In an experimental approach, the possibilities of proton conductivity in GO, graphite oxide (GO 0 ), and GO-proton hybrid (GO-H) were systematically estimated under various temperature and humidity conditions (Fig. 5).…”

Light Response and Switching Behavior of Graphene Oxide Membranes Modified with Azobenzene Compounds

“…The variation of the interlayer distance in the modified GO under UV and IR irradiation was evaluated using the P03 beamline of PETRA III Deutsches Elektronen-Synchrotron (DESY, Hamburg, Germany) in a grazing incidence geometry [19]. An incident photon beam with an energy of 19.8 keV (λ = 0.6262 Å, ∆λ/λ = 10 −4 ) and a beam size at the sample position of 33 × 27 µm 2 was used.…”

“…More stable switchable structures are provided with two-dimensional stacked materials, thus enabling a lattice variation in one dimension. Those are represented by graphene [18], graphene oxides [19], MXenes [20], and the 2D nanoflakes of semiconductors [9], which were successfully employed in hydrogen separation [21,22], air dehumidification [23] and removal of condensable gases [24]. Among the other 2D materials, graphene oxide has gained most of the attention due to its impressive performance in dehumidification processes, its ease of fabrication, and the diverse chemical nature of its functional groups, which are available for chemical grafting [25].…”

Graphene Oxide Membranes—Synthesis, Properties, and Applications

“…From the point of view of the practical application of GO membranes for gas separation, the resistance of the internal structure of the membrane to the applied pressure is of great importance. The authors of paper [ 4 ] studied the creation of pressure-resistant GO membranes by introducing carbon-based spacers—oxidized derivatives of fullerenes C 60 (OH) 26–32 and graphene oxide nanoribbons—into the inter-plane space. The permeability of the native and composite membranes for various gases (H 2 , He, CH 4 , N 2 , O 2 , CO 2 , C 4 H 10 , and SF 6 ), as well as water vapor, was measured.…”