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Issue 25, 2016
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Hydrothermal self-assembly of graphene foams with controllable pore size

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Abstract

Pore size is a critical parameter that affects the basic physicochemical properties and applications of porous graphene foam, but the preparation of graphene foam with controllable pore size is still a big challenge, especially by a self-assembly method. In this work, graphene oxide (GO) sheets with different lateral sizes by controlling the delamination conditions of graphite oxide were used as building blocks to form graphene foams with adjustable pore size, by a convenient one-step hydrothermal self-assembly method. The pore sizes of graphene foams can be effectively controlled by simply altering the sheet sizes of GO, and the smallest average pore size is ∼500 nm, which is much smaller than the micrometer-scale pores in the reported graphene foam materials. Static contact angles, nitrogen adsorption–desorption isotherms and adsorption of methylene blue are measured to demonstrate the strong dependence of some important physicochemical properties of graphene foams on their pore sizes. This simple method offers a novel way to rationally synthesize graphene foam with appropriate pore size for various practical applications.

Graphical abstract: Hydrothermal self-assembly of graphene foams with controllable pore size

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Supplementary files

Article information


Submitted
07 Dec 2015
Accepted
15 Feb 2016
First published
15 Feb 2016

RSC Adv., 2016,6, 20843-20849
Article type
Paper

Hydrothermal self-assembly of graphene foams with controllable pore size

W. Deng, Q. Fang, X. Zhou, H. Cao and Z. Liu, RSC Adv., 2016, 6, 20843
DOI: 10.1039/C5RA26088D

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