Tailoring pores in graphene-based materials: from generation to applications

Yang, Tieshan; Lin, Han; Zheng, Xiaorui; Loh, Kian Ping; Jia, Baohua

doi:10.1039/c7ta04692h

Cited by 111 publications

(72 citation statements)

References 147 publications

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“…On the other hand, volumetric capacity (VC) increases with ρ, and the pore size must be tuned to the adsorbed fluid [26]. Clearly, the capability of finely controlling the structural parameters has a main role [56]. This task is not only difficult, but also somehow ill-defined, since the experimental structural determinations of GNM are limited to the measurement of pair distribution functions (PDF) and average pore size or at most the PSD.…”

Section: Graphene-based Nano-porous Materials: Production and Computementioning

confidence: 99%

Engineering 3D Graphene-Based Materials: State of the Art and Perspectives

Bellucci

Tozzini

2020

Molecules

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Graphene is the prototype of two-dimensional (2D) materials, whose main feature is the extremely large surface-to-mass ratio. This property is interesting for a series of applications that involve interactions between particles and surfaces, such as, for instance, gas, fluid or charge storage, catalysis, and filtering. However, for most of these, a volumetric extension is needed, while preserving the large exposed surface. This proved to be rather a hard task, especially when specific structural features are also required (e.g., porosity or density given). Here we review the recent experimental realizations and theoretical/simulation studies of 3D materials based on graphene. Two main synthesis routes area available, both of which currently use (reduced) graphene oxide flakes as precursors. The first involves mixing and interlacing the flakes through various treatments (suspension, dehydration, reduction, activation, and others), leading to disordered nanoporous materials whose structure can be characterized a posteriori, but is difficult to control. With the aim of achieving a better control, a second path involves the functionalization of the flakes with pillars molecules, bringing a new class of materials with structure partially controlled by the size, shape, and chemical-physical properties of the pillars. We finally outline the first steps on a possible third road, which involves the construction of pillared multi-layers using epitaxial regularly nano-patterned graphene as precursor. While presenting a number of further difficulties, in principle this strategy would allow a complete control on the structural characteristics of the final 3D architecture.

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Section: Graphene-based Nano-porous Materials: Production and Computementioning

confidence: 99%

Engineering 3D Graphene-Based Materials: State of the Art and Perspectives

Bellucci

Tozzini

2020

Molecules

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“…4 Compared with other porous carbon materials, graphene-based porous materials have high mechanical strength, a large specic surface area, good chemical and thermal stability, and high electrical conductivity, and are easy to be combined with other organic and inorganic materials. 5 Porous graphene materials show outstanding performance in the energy storage eld due to their unique microstructure and properties. [6][7][8] The pore size, pore shape, and pore volume of the porous graphene material are critical to the performance.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and electrochemical performance of 3D hierarchical porous graphene/polyaniline composites

et al. 2020

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“…Layered dielectrics such as graphene oxide (GO) and other dielectrics are widely used as substrates and gate dielectrics to build different two-dimensional nanoscale devices, e.g., graphene-based vertical heterostructures [1], waveguide connectors [2], and thin film transistors [3]. Specifically, GO, a hydrophilic atomic sheet of graphite with oxygen functionalities, is a graphene-based dielectric which forms a layered assembly with an adjustable interlayer spacing at different humidity [4][5][6] due to absorbing water. Membrane structures made of GO show an exceptional water permeation and molecular sieving properties [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Electric-field-induced emergent electrical connectivity in graphene oxide

et al. 2019

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Understanding the appearance of local electrical connectivity in liquid filled layered graphene oxide subjected to an external electric field is important to design electrically controlled smart permeable devices and also to gain insight into the physics behind electrical effects on confined water permeation. Motivated by recent experiments [K. G. Zhou et al. Nature (London) 559, 236 (2018)], we introduce a new model with random percolating paths for electrical connectivity in micron thick water filled layered graphene oxide, which mimics parallel resistors connected across the top and bottom electrodes. We find that a strong nonuniform radial electric field of the order ∼10-50 mV/nm can be induced between layers depending on the current flow through the formed conducting paths. The maxima of the induced fields are not necessarily close to the electrodes and may be localized in the middle region of the layered material. The emergence of electrical connectivity and the associated electrical effects have a strong influence on the surrounding fluid in terms of ionization and wetting which subsequently determines the permeation properties.

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Tailoring pores in graphene-based materials: from generation to applications

Abstract: Combining the merits from both porous material and graphene, porous graphene-based materials have received significant attention due to their unique porous structures, large surface areas and prominent electrical conductivity.

Cited by 111 publications

References 147 publications

Engineering 3D Graphene-Based Materials: State of the Art and Perspectives

Engineering 3D Graphene-Based Materials: State of the Art and Perspectives

Microstructure and electrochemical performance of 3D hierarchical porous graphene/polyaniline composites

Electric-field-induced emergent electrical connectivity in graphene oxide

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