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Silver nanowire/graphene composite elastic aerogel, and preparation method and application thereof

A graphene composite, silver nanowire technology, applied in nanotechnology, nanotechnology, chemical instruments and methods, etc., to achieve the effects of high compressibility, adjustable resistance, and wide application value

Inactive Publication Date: 2015-11-11
BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Silver nanowires have a high specific surface area, excellent electrical conductivity, thermal conductivity, and good flexibility, and have a bactericidal function. Combining silver nanowires with graphene will solve the above problems, but relevant research has not yet been carried out.

Method used

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  • Silver nanowire/graphene composite elastic aerogel, and preparation method and application thereof
  • Silver nanowire/graphene composite elastic aerogel, and preparation method and application thereof
  • Silver nanowire/graphene composite elastic aerogel, and preparation method and application thereof

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specific Embodiment approach

[0029] Silver nanowire / graphene composite elastic airgel of the present invention, its preferred embodiment is:

[0030] A three-dimensional network cross-linked structure built with graphene as the skeleton, silver nanowires distributed on the surface of graphene as elastic support and conductive enhancement unit, airgel density 0.5-300mg / cm 3 , compressibility 20% to 85%, electrical conductivity 10 -2 ~10 3 S / m.

[0031] The gel preparation method of silver nanowire / graphene composite elastic air-gel of the present invention, its preferred embodiment is:

[0032] Include the following steps:

[0033] (1) dispersing graphene oxide in deionized water of different weight parts to form a graphene oxide dispersion with a concentration of 0.1 to 30 mg / mL;

[0034] (2) dispersing the silver nanowires in deionized water with different weight parts to form a silver nanowire dispersion with a concentration of 0.05 to 30 mg / mL;

[0035] (3) mixing the graphene oxide dispersion liq...

Embodiment 1

[0056] A preparation method of silver nanowire / graphene composite elastic airgel, the specific steps are as follows:

[0057] (1) dispersing graphene oxide in deionized water to form a concentration of 2.0mg / mL graphene oxide dispersion;

[0058] (2) dispersing the silver nanowires in deionized water to form a silver nanowire dispersion with a concentration of 1.0 mg / mL;

[0059] (3) Mix the graphene oxide dispersion with the silver nanowire dispersion, and mechanically stir for 0.5h to obtain a silver nanowire-graphene oxide mixed dispersion;

[0060] (4) Add the silver nanowire-graphene oxide mixed dispersion obtained in step (3) into sodium bisulfite (the mass ratio of sodium bisulfite to graphene oxide is 1:30), put it in a water bath, and heat it at 95°C Reduction 8h obtains silver nanowire / graphene hydrogel;

[0061] (5) Put the silver nanowire / graphene composite hydrogel obtained in step (4) into ammonia water with a concentration of 14%, soak for 3 days, and remove t...

Embodiment 2

[0065] (1) dispersing graphene oxide in deionized water to form a concentration of 5.0mg / mL graphene oxide dispersion;

[0066] (2) dispersing the silver nanowires in deionized water to form a silver nanowire dispersion with a concentration of 1.0 mg / mL;

[0067] (3) Mix the graphene oxide dispersion with the silver nanowire dispersion, and magnetically stir for 1.0 h to obtain a silver nanowire-graphene oxide mixed dispersion;

[0068] (4) Add ascorbic acid (the mass ratio of ascorbic acid to graphene oxide is 1:50) to the silver nanowire-graphene oxide mixed dispersion obtained in step (3), put it in a water bath, and reduce it at 95°C for 3 hours to obtain silver nanowires - graphene hydrogel;

[0069] (5) Put the silver nanowire / graphene composite hydrogel obtained in step (4) into ammonia water with a concentration of 10%, soak for 5 days, and remove the residual impurities of the reaction;

[0070] (6) The silver nanowire / graphene composite hydrogel obtained in step (5...

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Abstract

The invention discloses a silver nanowire / graphene composite elastic aerogel, and a preparation method and application thereof. The silver nanowire and graphene composite elastic aerogel adopts a three-dimensional network structure in which silver nanowires are distributed on the surface of graphene to be used as elastic supporting and conductivity enhancement units. The preparation method for the aerogel comprises the following steps: firstly, preparing silver nanowires and an oxidized graphene dispersion solution; secondly, mixing the silver nanowires and the graphene dispersion solution with a reducing agent for reduction reaction to obtain silver nanowire and graphene hydrogel; finally, drying the obtained silver nanowire and graphene hydrogel to obtain the silver nanowire and graphene composite elastic aerogel. The silver nanowire and graphene composite elastic aerogel has the characteristics of being high in specific surface area, compression resistance and resistance adjustability, and the like, and has a high application value in the field of organic pollutant adsorption, catalysis, pressure resistance switches and the like.

Description

technical field [0001] The invention relates to a graphene airgel preparation technology, in particular to a silver nanowire / graphene composite elastic airgel and its preparation method and application. Background technique [0002] Graphene is a carbon atom with sp 2 The hybridized orbitals form a hexagonal planar film with a honeycomb lattice, a two-dimensional material with a thickness of only one carbon atom. Graphene has good physical properties such as electrical conductivity, thermal conductivity, and mechanics. Since it was first prepared by scientists in 2004 (Novoselov, K.S.etal.Science, 2004, 306, 666), it has been widely concerned by scientists. It is widely used in batteries, supercapacitors, Electronic devices and other fields have a wide range of applications. [0003] Airgel is a porous foam-like solid material with extremely light density and high specific surface area. Graphene airgel has the characteristics of both graphene and aerogel, such as high por...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/20B01J20/30B01J23/50B01J35/10B82Y30/00
Inventor 邢光建杨志鑫郭红丽武光明
Owner BEIJING INSTITUTE OF PETROCHEMICAL TECHNOLOGY
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