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Spongy-like lightweight graphene aerogel preparation method

A graphene airgel and sponge-like technology, applied in the field of nanomaterials, can solve the problems of poor adsorption performance of airgel materials, failure to maintain the original shape, and inability to complete desorption, etc., to achieve excellent adsorption performance, density reduction, The effect of increasing the specific surface area

Inactive Publication Date: 2016-03-09
CAPITAL NORMAL UNIVERSITY
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Problems solved by technology

[0003] The purpose of the present invention is to provide a preparation method of spongy light graphene airgel, aiming to solve the problem that the airgel material has poor adsorption performance, cannot complete desorption after adsorption, and cannot be reused. The problem that the original shape cannot be maintained in

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  • Spongy-like lightweight graphene aerogel preparation method

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[0017] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0018] The invention provides a preparation method of spongy light graphene airgel, comprising: adding a certain amount of graphite oxide into neutral, acidic or alkaline aqueous solution, and obtaining uniform and stable graphite oxide through ultrasonic dispersion or mechanical stirring Graphene solution; the graphene oxide solution exists stably for at least 1-72 hours; the above-mentioned graphene oxide solution is added to different surfactants, and after fully stirring, mechanical methods such as high-speed stirring are used to obtain a foamy graphene oxide foam suspension, and then The suspension is quickly frozen an...

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Abstract

The present invention discloses a spongy-like lightweight graphene aerogel preparation method, which comprises: preparing a graphene oxide colloid solution with a concentration of not more than 10 mg / mL; adding a surfactant with a concentration of 0.01-0.1 wt% into the graphene oxide dispersion, and completely dissolving to obtain a foam-like graphene oxide foam suspension; and immediately placing the foam system into liquid nitrogen after completing the foaming, carrying out rapid freezing shaping, carrying out freeze drying, and removing the water to obtain the graphene aerogel material. According to the spongy-like lightweight graphene aerogel of the present invention, the solution system surface tension is reduced, and the dispersion property of the graphene oxide in the solvent is improved while the specific surface area of the aerogel material is further increased so as to improve the adsorption property on dyes, organic solvents and other substances; and the prepared spongy-like lightweight graphene aerogel material has characteristics of simple process, low cost, stable structure, excellent performance, and maximal maintaining of the excellent properties of the graphene material.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, in particular to a method for preparing a sponge-like lightweight graphene airgel. Background technique [0002] The biggest application of airgel materials lies in adsorption (such as adsorption of dyes, organic waste liquids, etc.). To achieve the purpose of reuse and whether the airgel material can better maintain its original shape during the adsorption process. The current airgel materials have poor adsorption performance, cannot complete desorption after adsorption, cannot be reused, and cannot maintain the original shape during the adsorption process. Contents of the invention [0003] The purpose of the present invention is to provide a preparation method of spongy light graphene airgel, aiming to solve the problem that the airgel material has poor adsorption performance, cannot complete desorption after adsorption, and cannot be reused. The problem that the original shape...

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Application Information

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IPC IPC(8): C01B31/04
CPCC01B2204/20
Inventor 刘佳奇罗巧梅张怡萌郑婷婷左霞
Owner CAPITAL NORMAL UNIVERSITY
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