Method for preparing three-dimensional graphene-copper nanowire composite aerogel

A technology of composite airgel and copper nanowires, applied in chemical instruments and methods, colloid chemistry, colloid chemistry, etc., can solve problems such as poor compression performance, achieve high electrical conductivity, good mechanical stability, and simple and easy process Effect

Inactive Publication Date: 2015-07-29
ZHEJIANG SCI-TECH UNIV
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Problems solved by technology

[0004] Aiming at the problem of poor compressibility of existing three-dimensional graphene materials, the object of t

Method used

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  • Method for preparing three-dimensional graphene-copper nanowire composite aerogel
  • Method for preparing three-dimensional graphene-copper nanowire composite aerogel
  • Method for preparing three-dimensional graphene-copper nanowire composite aerogel

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Embodiment 1

[0021] Add the obtained graphite oxide into water, and sonicate for 4 hours to obtain an aqueous solution of graphene oxide, wherein the concentration of the graphene oxide solution is 8 mg / ml. Take 4 beakers (marked as A~D respectively) and add 18ml, 18ml, 16.25ml, 16.25ml of ethylene glycol respectively, so that the amounts in the 4 beakers are equal, and add them to the beakers in turn according to the ratio shown in Table 1 Copper nanowires, ascorbic acid, and graphene oxide solutions; each substance is added to form a uniformly dispersed mixed solution by mechanical stirring and ultrasonic treatment. Then transfer the mixed solution in the beaker to the polytetrafluoroethylene lining of the autoclave, put the reaction kettle in a blast drying oven at 160°C for 6 hours, and after the reaction is over, cool the reaction kettle to room temperature (25°C) ), to obtain a three-dimensional graphene-copper nanowire composite hydrogel. The columnar composite hydrogel obtained by...

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Abstract

The invention discloses a method for preparing three-dimensional graphene-copper nanowire composite aerogel. The method comprises the following steps: first, preparing copper nanowires; mixing the copper nanowires and an oxidized graphene solution into an ethylene glycol solution; adding ascorbic acid which serves as a reducing agent; carrying out hydrothermal reaction to obtain three-dimensional graphene-copper nanowire composite hydrogel; finally, washing the three-dimensional graphene-copper nanowire composite hydrogel with a hydrazine hydrate solution which is 0.5 wt%; carrying out freeze-dry treatment to obtain the three-dimensional graphene-copper nanowire composite aerogel. The three-dimensional graphene-copper nanowire composite aerogel adopts a three-dimensional porous structure, and has the advantages of being high in compression performance, low in density, high in electric conductivity and the like.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a simple and feasible method for preparing a three-dimensional graphene-copper nanowire composite airgel. Background technique [0002] As a unique two-dimensional nanomaterial, graphene has a large specific surface area, high electron mobility, good thermal stability and excellent mechanical properties. It has been widely used in electronic devices, energy storage, chemical catalysis, environmental pollution control and other fields. . The preparation of graphene in the laboratory generally adopts the redox method with low cost and simple preparation process, by preparing graphene oxide, and then reducing graphene oxide as a cheap substitute of graphene. In recent years, three-dimensional graphene materials have gradually become a research hotspot in the preparation of functionalized graphene materials. Compared with pristine graphene, 3D graphene ...

Claims

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Application Information

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IPC IPC(8): B01J13/00
Inventor 刘爱萍陆标
Owner ZHEJIANG SCI-TECH UNIV
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