Porous structures in stacked, crumpled and pillared graphene-based 3D materials

Graphene, an atomically thin material with the theoretical surface area of 2600m2g−1, has great potential in the fields of catalysis, separation, and gas storage if properly assembled into functional 3D materials at large scale. In ideal non-interacting ensembles of non-porous multilayer graphene pl...

Full description

Saved in:
Bibliographic Details
Published in:Carbon (New York) 2014-01, Vol.66, p.476-484
Main Authors: Guo, Fei, Creighton, Megan, Chen, Yantao, Hurt, Robert, Külaots, Indrek
Format: Article
Language:English
Subjects:
Chemistry
Colloidal state and disperse state
Cross-disciplinary physics: materials science
rheology
Deposition
Exact sciences and technology
Fullerenes and related materials
diamonds, graphite
General and physical chemistry
Graphene
Materials science
Multilayers
Oxides
Physics
Plates
Porous materials
Specific materials
Stacking
Surface area
Three dimensional
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Graphene, an atomically thin material with the theoretical surface area of 2600m2g−1, has great potential in the fields of catalysis, separation, and gas storage if properly assembled into functional 3D materials at large scale. In ideal non-interacting ensembles of non-porous multilayer graphene plates, the surface area can be adequately estimated using the simple geometric law ∼2600 m2g−1/N, where N is the number of graphene sheets per plate. Some processing operations, however, lead to secondary plate–plate stacking, folding, crumpling or pillaring, which give rise to more complex structures. Here we show that bulk samples of multilayer graphene plates stack in an irregular fashion that preserves the 2600/N surface area and creates regular slot-like pores with sizes that are multiples of the unit plate thickness. In contrast, graphene oxide deposits into films with massive area loss (2600–40m2g−1) due to nearly perfect alignment and stacking during the drying process. Pillaring graphene oxide sheets by co-deposition of colloidal-phase particle-based spacers has the potential to partially restore the large monolayer surface. Surface areas as high as 1000m2g−1 are demonstrated here through colloidal-phase deposition of graphene oxide with water-dispersible aryl-sulfonated ultrafine carbon black as a pillaring agent.
ISSN:0008-6223
1873-3891
DOI:10.1016/j.carbon.2013.09.024