Method for controllably preparing nano-scale ultra-thin graphyne and its derivatives

CN119118109BActive Publication Date: 2025-03-28NANKAI UNIV
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Patent Information

Application Number
CN202411289672.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-09-14
Publication Date
2025-03-28
Estimated Expiration
2044-09-14

AI Technical Summary

Technical Problem

It is difficult to obtain an intrinsic small-layer graphite alkyne structure with uniform mass in batches, and the alkyne bonds are prone to react under strong oxidation conditions, resulting in a decrease in the alkyne bond content in the structure and introduce difficult-to-removal oxygen-containing functional groups.

Method used

Using a controllable expansion of copper substrate, nano-sized ultra-thin graphite and its derivatives were prepared in batches from bottom to top through the hard template method, with a thickness of about 2 nanometers, avoiding the introduction of functional groups during strong oxidation.

Benefits of technology

The intrinsic thin layer of graphite alkyne without other functional groups is achieved, and this method is suitable for the preparation of thin layer of a variety of graphite alkyne derivatives, with the advantages of low cost, simple process and controllable quality.

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Abstract

The present invention belongs to the field of nano-carbon material preparation, and discloses a method for controllably preparing nano-scale ultra-thin graphyne and its derivatives. Substance A and substance B are mixed and ball-milled to obtain a mixed powder, wherein substance A is a copper-containing salt, and substance B is a salt that is insoluble in acetone and pyridine, soluble in water or acid, and does not decompose within 200°C; the mixed powder is placed in a closed heating environment, heated at 200-450°C, cooled to room temperature, and then dripped with an acetone solution of graphyne or its derivative monomer, and the temperature is maintained for 1-2 days after the dripping is completed, and then cooled to room temperature; then the powder is soaked in dilute hydrochloric acid for 1-3 days, filtered, and the filter cake is freeze-dried to obtain a nano-scale ultra-thin graphyne film. Compared with the prior art, the advantage of the present invention is that it can obtain an intrinsic thin layer of graphyne without other functional groups, with a thickness of about 2 nanometers. Compared with the oxidation exfoliation method, the invention has the advantages of low cost, simple process, and controllable quality.
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