A kind of hexagonal prism graphene-metal organic framework composite material and preparation method thereof

Abstract

The invention relates to a hexagonal prism type graphene-metal organic framework composite material as well as a preparation method thereof and belongs to the technical field of high polymer chemistry, polymer self-assembly and supermolecular materials. Firstly, carboxyl graphene coordinates with copper ions through a solvothermal reaction, and a precursor is prepared; then, an organic carboxylic acid ligand is directly added to a precursor reaction solution, a secondary solvothermal reaction is performed, and the precursor plays a role in structure directing of crystal growth. Compared with the original octahedron configuration of a copper-based coordination polymer, the carboxyl graphene-copper ion coordination precursor changes the morphology of the composite material into the hexagonal prism type, and the performance in the aspect of gas adsorption is improved. The preparation technology is simple, the cost is low, the carboxyl graphene-copper ion coordination precursor is used as a structure-directing agent under the mild condition, so that the morphology of the copper-based coordination polymer is changed, and the gas adsorption performance of the material is improved. A brand-new way is provided for change of the morphology of the metal organic coordination polymer.

Description

technical field [0001] The invention belongs to the technical fields of polymer chemistry, polymer self-assembly and supramolecular materials, and specifically relates to a hexagonal prism graphene-metal organic framework composite material and a preparation method thereof. Background technique [0002] Defective sp in graphene oxide 2 The chemically active sites provided by the hybrid structure and oxygen-containing groups make it easy to produce bonding interactions with other substances. Moreover, the upper and lower surfaces and edges of the graphene oxide layer can be functionalized, which provides nanometer-sized two-dimensional building blocks for the synthesis of new hybrid supramolecules through self-assembly technology [J. Mater.Chem., 2010, 20, 2277.]. Thus, the dual-surface functionalization of graphene oxide layers can serve as a structure-directing agent for molecular assembly. The group of Bandosz T. J. first reported the preparation of graphene oxide and M...

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Problems solved by technology

This composite method is difficult to synthesize a unique structure different from MOFs, and does not fully reflect the structure-guiding role of graphene oxide in the synthesis of MOFs

The surface and edge of the graphene oxide layer contain only a few carboxyl functional groups that can participate in the MOF-5 assembly process, which limits the metal chelation ability of graphene oxide and MOFs.

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