Method for preparing three-dimensional porous graphene material by solution

Abstract

The invention discloses a method for preparing a three-dimensional porous graphene material by solution. The method comprises the following steps of: immersing a three-dimensional porous template into a graphene oxide solution, and then depositing the graphene oxide on the template to realize three-dimensional assembling of the graphene oxide on the template, and then preparing the three-dimensional porous graphene material containing the template by reduction; removing the template from the three-dimensional porous graphene material containing the template, and then washing to obtain the three-dimensional porous graphene material. The aperture of the three-dimensional porous graphene material can be regulated and controlled by using the templates with different apertures the material prepared by the invention has the advantages of low density, high specific surface area, high heat conductivity, high-temperature resistance, and corrosion resistance; the preparation method is economical and simple and suitable for large-scale production. And the prepared material is applicable to aspects such as catalytic carriers, preparation of flexible conductors, and stretchable electronics.

Description

technical field [0001] The invention belongs to the graphene three-dimensional porous material technology, in particular to a method for preparing a three-dimensional graphene three-dimensional porous material from a solution. Background technique [0002] Single-layer carbon atom crystal structure: Graphene has excellent photoelectric and mechanical properties, and can be used in fields such as field-effect transistors, sensors, and single-molecule detectors. The three-dimensional structure composed of graphene as the basic unit and its composite materials with polymers, ceramics and metals may be applied to controllable gas permeability films, supercapacitors, lithium-ion batteries, molecular storage, hydrogen storage, electrochemical sensing, Functional materials such as fuel cells, energy catalysis, flexible electronic conductors and electronic devices. "Three-dimensional flexible and conductive interconnected graphene networks grown by chemical vapor deposition" (Zongp...

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Problems solved by technology

"Three-dimensional flexible and conductive interconnected graphene networks grown by chemical vapor deposition" (Zongping Chen, Libo Gao, HuiMing Cheng, et al. Nature Materials, 2011, 10: 424-428) realized the three-dimensional structure of graphene through vapor deposition , and used to fabricate flexible, stretchable graphene / polymer composite conductors, but this requires more complex procedures and more expensive equipment

Noble-Metal-Promoted Three-Dimensional Macroassembly of Single-Layered Graphene Oxide (Shuling Shen, Jing Zhuang, Xun Wang, et al..Angew.Chem.2010, 122, 4707–4711) achieves graphene in solution by utilizing noble metals 3D assembly, but the resulting graphene material shows low conductivity due to incomplete reduction of oxides, structural defects, etc.

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