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Graphene nano particle compound aerogel microspheres and preparation method thereof

A composite airgel and nanoparticle technology, which is applied in the field of graphene nanoparticle composite airgel microspheres and its preparation, can solve the problem of inconvenient loading of metal/inorganic nanoparticles, difficulty in controlling the structure of airgel microspheres, Low production efficiency and other problems, to achieve the effect of uniform size, light weight and easy operation

Inactive Publication Date: 2016-04-20
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this preparation method is relatively complicated to operate, the production efficiency is low, the structure of the prepared airgel microspheres is difficult to control, and it is not convenient for metal / inorganic nanoparticles to be evenly loaded on the graphene airgel microspheres.

Method used

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  • Graphene nano particle compound aerogel microspheres and preparation method thereof
  • Graphene nano particle compound aerogel microspheres and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Preparation of graphite oxide: natural graphite was prepared into graphite oxide by Brodie oxidation method.

[0026] (2) Preparation of graphene oxide-metal / inorganic nanoparticle aqueous dispersion: at room temperature, 0.8g of graphite oxide prepared by Brodie oxidation method, 0.8gTiO 2 The nanoparticles were mixed with 100ml of deionized water, irradiated with 1600W ultrasonic waves for 60 minutes and then stirred overnight to obtain a light brown dispersion.

[0027] (3) Place ethyl acetate in an open Dewar flask with good heat preservation, and add a large amount of liquid nitrogen while stirring until a slush-like liquid nitrogen / ethyl acetate cooling bath is formed. Place the beaker containing toluene in a liquid nitrogen / ethyl acetate cooling bath to cool as the receiving solution. At the same time, put the prepared dispersion liquid into the syringe on the ultrasonic spray device, adjust the height of the syringe nozzle to make it a suitable distance fro...

Embodiment 2

[0031] (1) Preparation of graphite oxide: natural graphite was prepared as graphite oxide by the improved Hummer method.

[0032] (2) Preparation of graphene oxide-metal / inorganic nanoparticle aqueous dispersion: at room temperature, 1.5g of graphite oxide prepared by the Hummer method, 0.15g of Au nanoparticles and 100ml of deionized water were mixed, and stirred overnight after 1600W ultrasonic irradiation for 160 minutes. A brown-red dispersion was obtained.

[0033] (3) Put the acetone in a well-insulated open Dewar flask, and add dry ice pieces while stirring until it is almost impossible to stir, that is, a viscous dry ice / acetone cooling bath is formed. Cool the beaker with dichloromethane in a dry ice / acetone cooling bath as the receiver solution. At the same time, put the prepared dispersion liquid into the pressure chamber on the pressure spray device, adjust the height of the nozzle to make it a suitable distance from the receiving liquid, turn on the pressure pump...

Embodiment 3

[0037] (1) Preparation of graphite oxide: natural graphite was prepared as graphite oxide by the Hummer method.

[0038] (2) Preparation of graphene oxide-metal / inorganic nanoparticle aqueous dispersion: at room temperature, mix graphite oxide prepared by 0.6g Hummer method, 0.4gAg nanoparticles and 100ml deionized water, and stir overnight after 1600W ultrasonic irradiation for 100 minutes, A light brown dispersion was obtained.

[0039] (3) Put the acetone in a well-insulated open Dewar flask, and add dry ice pieces while stirring until it is almost impossible to stir, that is, a viscous dry ice / acetone cooling bath is formed. Cool the beaker containing n-heptane in a dry ice / acetone cooling bath as the receiver solution. At the same time, put the prepared dispersion into the pressure chamber on the pressure spray device, adjust the height of the nozzle to make it a suitable distance from the receiving liquid, turn on the pressure pump and adjust it to 250Mpa, start sprayin...

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Abstract

The invention relates to graphene nano particle compound aerogel microspheres and a preparation method thereof, and belongs to the field of functional materials. The graphene nano particle compound aerogel microspheres are prepared from, by weight, 100 parts of deionized water, 0.05-1.5 parts of graphite oxide and 0.1-5 parts of nano particles. The raw materials are subjected to 1,600W ultrasound wave irradiation for 60 min to 180 min after being mixed to be prepared into a graphene oxide nano particle dispersion solution, the graphene oxide nano particle dispersion solution is atomized into graphene oxide nano particle drop microspheres through a spraying method, the graphene oxide nano particle drop microspheres are put in a cooling bath for receiving liquid collection, graphene oxide nano particle cold microspheres are obtained through filtering, and graphene oxide nano particle compound aerogel microspheres are obtained after freeze drying; the graphene nano particle compound aerogel microspheres are obtained through a thermal reduction method or chemical reduction method. The products are uniform in size, are provided with a porous net structure, are evenly loaded with metal / inorganic nano particles, and are low in mass and small in density. Meanwhile, the preparation method is easy to operate, simple and efficient.

Description

technical field [0001] The invention relates to graphene nanoparticle composite airgel microspheres and a preparation method thereof, belonging to the field of functional materials. Background technique [0002] Graphene is a new type of two-dimensional material with superior mechanical, electrical, optical, thermal and other properties, and has attracted extensive attention from people from all walks of life. Constructing two-dimensional graphene sheets into three-dimensional graphene macroscopic materials, such as hydrogels, aerogels, etc., can not only maintain the excellent properties of graphene as a two-dimensional material, but also enable graphene to be used in life and production. Has a practical use. Among them, graphene airgel has unique advantages such as low density, high specific surface area, porous and large pore volume, high electrical conductivity, good thermal stability and controllable structure, which has attracted great attention of researchers. Catal...

Claims

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Application Information

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IPC IPC(8): B01J13/00B01J13/02B01J13/04
CPCB01J13/0091B01J13/02B01J13/043B01J13/046
Inventor 夏和生廖述驰
Owner SICHUAN UNIV
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