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Zinc oxide/reduced graphene oxide aerogel and preparation method of zinc oxide/reduced graphene oxide aerogel

A graphene aerogel, zinc oxide technology, applied in metal/metal oxide/metal hydroxide catalysts, chemical instruments and methods, chemical/physical processes, etc., can solve the problem of unfavorable large-area preparation and no graphene It can be combined with zinc oxide and high temperature, so as to achieve the effect of low cost, strong practicability and high utilization rate of raw materials.

Inactive Publication Date: 2016-07-13
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the composite structures of zinc oxide and graphene in these reports are basically depositing zinc oxide on a graphene plane, and it is rare to grow zinc oxide on the upper and lower surfaces of graphene at the same time, let alone graphene and zinc oxide. Combination of three-dimensional space, such as forming an airgel structure
In addition, there are also some such as the patent CN103482615A "A Preparation Method of Foamed Graphene-ZnO Composite Material", which mentions the composite of graphene and zinc oxide, including making a three-dimensional structure, but there are problems such as high temperature during the synthesis process. , which is not conducive to large-area preparation
[0006] To sum up, at present, the compounding of graphene and zinc oxide is only limited to a single graphene surface, and there are few reports on actually compounding zinc oxide / reduced graphene oxide in three-dimensional space to make aerogels, so in this respect It will be very meaningful work to explore

Method used

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  • Zinc oxide/reduced graphene oxide aerogel and preparation method of zinc oxide/reduced graphene oxide aerogel

Examples

Experimental program
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Effect test

Embodiment 1

[0030] (1) Take 30mg graphene oxide and soak it in 60ml ethylene glycol for 1h, and in an ultrasonic device with a power of 100W, sonicate for 4h at room temperature to obtain a uniform graphene oxide ethylene glycol dispersion;

[0031] (2) Add 0.544g of zinc acetate, 0.2g of sodium citrate, and 1.2g of sodium acetate to the above dispersion in sequence, and stir evenly with magnetic force;

[0032] (3) Transfer the above mixed solution to the reaction kettle, take it out after reacting at 160° C. for 10 h, and wash repeatedly with deionized water and absolute ethanol several times;

[0033] (4) Zinc oxide / reduced graphene oxide airgel can be obtained by placing it in a freeze-drying box for 12 hours. Its surface morphology is as figure 1 As shown, we can see the obvious mesoporous structure formed by graphene folds, because the prepared graphene and zinc oxide composite structure is interconnected and stacked in three-dimensional space to form a porous structure, even this ...

Embodiment 2

[0035] (1) Take 60mg of graphene oxide and soak it in 60ml of ethylene glycol for 1h, and ultrasonically 4h at room temperature in an ultrasonic device with a power of 100W to obtain a uniform graphene oxide glycol dispersion;

[0036] (2) Add 0.544g of zinc chloride, 0.2g of sodium citrate, and 1.2g of sodium acetate to the above-mentioned dispersion in sequence, and stir evenly with magnetic force;

[0037] (3) Transfer the above mixed solution to the reaction kettle, take it out after reacting at 160° C. for 10 h, and wash repeatedly with deionized water and absolute ethanol several times;

[0038] (4) Zinc oxide / reduced graphene oxide airgel can be obtained by placing it in a freeze-drying box for 12 hours. Its surface morphology is as figure 2Shown, in this embodiment, reduced the concentration of graphene oxide, while observing the similar mesoporous structure in embodiment 1, found that the number of spherical zinc oxide nanoparticles is more, also is interspersed in ...

Embodiment 3

[0040] (1) Take 60mg of graphene oxide and soak it in 60ml of ethylene glycol for 1h, and ultrasonically 4h at room temperature in an ultrasonic device with a power of 100W to obtain a uniform graphene oxide glycol dispersion;

[0041] (2) Add 1.088g of zinc acetate, 0.2g of sodium citrate, and 1.2g of sodium acetate to the above dispersion in sequence, and stir evenly with magnetic force;

[0042] (3) Transfer the above mixed solution to the reaction kettle, take it out after reacting at 160° C. for 10 h, and wash repeatedly with deionized water and absolute ethanol several times;

[0043] (4) Zinc oxide / reduced graphene oxide airgel can be obtained by placing it in a freeze-drying box for 12 hours. Its surface morphology is as image 3 As shown, in fact, it is very similar to Example 2, and the mesoporous structure is also obvious, probably because of the increase of Zn 2+ The amount of the final ZnO nanosphere structure becomes more.

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Abstract

The invention discloses a method for preparing zinc oxide / reduced graphene oxide aerogel and belongs to the field of novel nano materials and preparation of the materials. The method comprises the specific steps: preparing graphene oxide by adopting an improved Hummers method; carrying out ultrasonic oscillation and dispersion to obtain a dispersion solution of graphene oxide in ethylene glycol; then adding zinc acetate, sodium citrate and sodium acetate into the dispersion solution at a certain ratio, and uniformly stirring with a magnetic force; transferring the mixed solution into a reaction kettle and reacting at 150 DEG C to 200 DEG C for 10h; then taking out the product and repeatedly washing the product with de-ionized water and absolute ethyl alcohol for a plurality of times; then storing the product into a freezing drying box for 12h to obtain the zinc oxide / reduced graphene oxide aerogel. The aerogel prepared by the method has a complete structure and good heat stability; the control of shapes and sizes of the aerogel can be realized. The method is simple in process, low in cost and strong in practicability. The zinc oxide / reduced graphene oxide aerogel has a wide application prospect in the aspects of photocatalytically degrading organic pollutants and the like in the water.

Description

technical field [0001] The invention relates to a method for preparing zinc oxide / reduced graphene oxide airgel, and belongs to the field of novel nanomaterials and material preparation. The process is simple, the cost is low, and the practicability is strong, and it has broad application prospects in photocatalytic degradation of organic pollutants in water and the like. Background technique [0002] Nanotechnology is an extremely important scientific research field in the 21st century. Devices based on nanotechnology will bring revolutionary changes to various fields. Among the basic nanostructure units used to assemble nanodevices, there are two kinds of functional and structural Unique materials are indispensable, one is zinc oxide, and the other is the current hot topic graphene, a two-dimensional crystal of a single atomic layer of graphene. Both materials possess unique optoelectronic properties, with the former possessing rich low-dimensional structures and the latt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/06B01J21/18
CPCB01J21/18B01J23/06B01J35/23
Inventor 孙立涛杜凯孙佳惟尹奎波毕恒昌
Owner SOUTHEAST UNIV
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