A centimeter-sized graphdiyne synthesized by liquid-liquid interface polymerization and its preparation method and application

Abstract

The invention discloses a centimeter-scale graphyne synthesized by liquid-liquid interface polymerization, a preparation method and an application thereof. The preparation method of the graphyne film comprises the following steps: dissolving the alkyne-based monomer in an organic solvent to obtain an organic phase solution; dissolving copper ions and nitrogen-containing ligands in an aqueous phase solvent to obtain an aqueous phase solution; The aqueous phase solution containing copper ions and nitrogen-containing ligands is added dropwise to the upper layer of the organic phase solution to form a reaction system with a two-phase solution and then stand still to obtain a centimeter-sized graphdiyne membrane. The invention can synthesize a self-supporting large-area uniform and continuous graphyne film without substrate support, and does not need to peel the graphyne film from the substrate, avoiding the influence of the etching substrate on the performance of the graphyne product, and can directly The characterization and application of graphdiyne membrane products have broad application prospects in the fields of photoelectrochemistry, energy, catalysis, electronics, biomedicine, and materials.

Description

Technical field [0001] The present invention belongs to the field of electrochemistry, materials technology. More specifically, it involves a centimeter-sized graphyne synthesized by a liquid-liquid interface polymerization reaction and a preparation method and application thereof. Background [0002] As we all know, carbon atoms can pass through sp, sp 2 and sp 3 The three hybrid forms are bonded, and according to their different hybrid forms and rich periodic characteristics, a variety of carbon allotropes can be obtained. Traditional carbon materials include charcoal, activated carbon, natural graphite and natural diamond. New carbon materials include carbon fiber, porous carbon, glass carbon, and star carbon materials such as fullerene, carbon nanotubes, and graphene. Because of their different structures, these carbon materials exhibit very different physicochemical properties. For example, sp 3 Hybridized diamond is the hardest material in nature and is an insulator; and sp...

AI Technical Summary

Problems solved by technology

In addition, the method of using the solid-liquid interface to synthesize graphyne film has certain limitations, and the product needs to be peeled off from the substrate. The peeling process will have a great impact on the performance of graphyne. The thickness of the graphyne film obtained by the peeling method and morphology are difficult to be uniform, and the few-layer film yield is very low

In 2017, Professor Nishihara's research group synthesized a graphyne membrane with the monomer molecule hexaethynylbenzene by means of liquid-liquid interface polymerization reaction. Limit the application of graphyne products

[0005] Therefore, the current synthesis of graphyne is still facing a huge challenge: it is still impossible to control the synthesis of a large-area uniform and continuous graphyne film that does not require inert gas protection, and the product does not need to be peeled off from the substrate.

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