Method for controllably preparing three-dimensional nanometer porous graphene powder by chemical vapor deposition method

Abstract

The invention discloses a method for controllably preparing a three-dimensional nanometer porous graphene powder by a chemical vapor deposition method. The method comprises the following steps of treating a solid catalyst by salt, and activating at high temperature; coating the surface of the solid powder, subjected to high-temperature activating, with a polymer, leading the solid powder, coated with the polymer, into a carbon source at high temperature, performing the chemical vapor deposition, and growing graphene; pickling, filtering, and drying, so as to obtain the three-dimensional nanometer porous graphene powder. The method has the advantages that the common core problem of particle agglomeration of a solid catalyst in a large-scale preparation process of graphene powder by the chemical vapor deposition method is solved by the surface coating of the catalyst; by adjusting the amount of the carbon source, the particle size of the solid catalyst and the amount of salt, the high-quality three-dimensional nanometer porous graphene powder can be controllably prepared; the technology process is simplified, the higher requirement preparation conditions on equipment is decreased, and the large-scale controllable preparation of the three-dimensional nanometer porous graphene powder is easy to implement.

Description

Technical field

[0001] The invention belongs to the technical field of graphene preparation, and specifically relates to a method for preparing three-dimensional nanoporous graphene powder controlled by a chemical vapor deposition method. Background technique

[0002] Graphene is a kind of sp 2 The hybrid orbitals form a new type of carbon nanomaterial with a hexagonal honeycomb lattice. The perfect structure of graphene gives it good electrical, thermal, optical, mechanical and other properties, making it have a wide range of potential applications in the chemical industry, energy storage, electronic devices, biomedicine, aerospace and other fields. Thanks to the excellent physical and chemical properties of graphene, countries around the world are actively engaged in the development and commercial application of graphene. Compared with other countries, my country has become one of the most active countries in graphene research and application development, and the upstream and ...

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