Synthesis and methane storage of binder-free porous graphene monoliths--颗粒学报PARTICUOLOGY

Ning, G., Wang, H., Zhang, X., Xu, C., Chen, G., & Gao, J. (2013). Synthesis and methane storage of binder-free porous graphene monoliths. Particuology, 11(4), 415–420. https://doi.org/10.1016/j.partic.2012.10.006

Synthesis and methane storage of binder-free porous graphene monoliths

Guoqing Ning^*, Hao Wang, Xiaoxin Zhang, Chenggen Xu, Guangjin Chen, Jinsen Gao

State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Beijing 102249, China

10.1016/j.partic.2012.10.006

Volume 11, Issue 4, August 2013, Pages 415-420

Received 1 July 2012, Revised 16 October 2012, Accepted 24 October 2012, Available online 2 April 2013.

E-mail: ngq@cup.edu.cn; ninggq@qq.com

Highlights

• Nanomesh graphene (NMG) was synthesized by template chemical vapor deposition.

• Binder-free graphene monoliths were prepared from loosely stacking NMG by tablet pressing.

• Graphene monoliths have obvious elasticity and a porous structure.

• Methane capacity of the graphene monolith was up to 236 (v/v) at 9 MPa.

Abstract

Nanomesh graphene (NMG) obtained by template chemical vapor deposition was used to synthesize the binder-free graphene monoliths by simple tablet pressing. The stacking manner of the NMG sheets was crucial to the cohesion interaction between the graphene sheets, only the NMG materials with a loosely stacking manner could be pressed into binder-free monoliths. At the tableting pressure of 2–8 MPa, both the bulk densities and the specific surface areas of the monoliths keep nearly constant as the tableting pressure increases, indicating that the NMG monoliths have obvious elasticity and a porous structure due to the large corrugations and the mesh structures of the graphene sheets. As a result, an extraordinary methane storage capacity of 236 (v/v) at 9 MPa was obtained in the graphene monolith prepared by tableting at 4 MPa.

Graphical abstract

Keywords

Binder-free; Graphene; Monoliths; Methane storage

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