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Method for synthesizing high-stability graphene oxide membrane

A technology with high stability and synthesis method, which is applied in the field of material science, can solve problems such as easy dispersion and stability problems, and achieve the effect of convenient and simple operation, improved stability and high stability

Inactive Publication Date: 2017-10-17
XUZHOU UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, because graphene oxide nanosheets are easy to disperse in water, this also brings new challenges to the application of graphene oxide membranes in water treatment-stability issues

Method used

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  • Method for synthesizing high-stability graphene oxide membrane

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Embodiment 1

[0024] Such as figure 1 Shown, a kind of high-stability graphene oxide membrane synthesis method comprises the following steps:

[0025] Step a, adopt improved Hummers method to prepare graphene oxide (GO); Concrete steps are:

[0026] Step 1: Weigh 2.5g of graphite and 1.25g of sodium nitrate, mix them in a 500mL wide-mouth glass bottle with a stirrer, put the glass bottle in an ice-water bath, and stir for 10 minutes;

[0027] Step 2: slowly add 60mL of sulfuric acid into the glass bottle with vigorous stirring, after 30 minutes, add 7.5g of potassium permanganate into the glass bottle, stir for 2 hours, then remove the ice-water bath, and stir the above mixture at room temperature 12 hours;

[0028] Step 3: Add 135mL deionized water and 25mL hydrogen peroxide, and continue to stir. When the mixture is cooled, a light yellow liquid is obtained, which is the initially obtained graphene oxide (GO), and then washed with hydrochloric acid and deionized water. Put the GO washe...

Embodiment 2

[0033] The difference from Example 1 is: in step b, the thickness of the obtained BPPO film is 50 μm; in step c, graphene oxide (GO) and ethylenediamine (EDA) are mixed according to a mass ratio of 1:800; other steps are Same as Example 1.

Embodiment 3

[0035] The difference from Example 1 is: in step b, the thickness of the obtained BPPO film is 80 μm; in step c, graphene oxide (GO) and ethylenediamine (EDA) are mixed according to a mass ratio of 1:180; other steps are all Same as Example 1.

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Abstract

The invention discloses a method for synthesizing a high-stability graphene oxide membrane. The method comprises the following steps: preparing graphene oxide; synthesizing a brominated polyphenyl ether membrane; mixing the graphene oxide with a cross-linking agent, performing ultrasonic treatment, filtering to the brominated polyphenyl ether membrane, and placing a mixed membrane into water-bath pot steam, thereby obtaining the graphene oxide membrane. By adopting the method, the stability of the synthesized graphene oxide membrane is greatly improved, GO (graphene oxide) and a BPPO brominated polyphenyl ether medium as well as GO and EDA (ethane diamine) are cross-linked, the problem that the graphene oxide membrane is easily dispersed in water is relatively well solved, and the problem that a method for synthesizing the graphene oxide membrane is complex is also solved. The method is a method for synthesizing a high-stability graphene oxide membrane, and the obtained graphene oxide membrane is applicable to environment pollution treatment and is particularly applicable to water treatment.

Description

technical field [0001] The invention belongs to the technical field of material science, and in particular relates to a method for synthesizing a graphene oxide film. The obtained graphene oxide composite film with high stability is especially suitable for water treatment. Background technique [0002] Graphene oxide has inherent properties such as monoatomic layer thickness, sheet structure, and water migration in the non-oxidized region of graphene oxide without resistance and smoothness. These intrinsic properties make graphene oxide more suitable for application in the field of membrane science. At the same time, because graphene oxide nanosheets are easy to disperse in water, this also brings a new challenge to the application of graphene oxide membranes in water treatment-the stability problem. Contents of the invention [0003] The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a high-stability graphene oxide film synth...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D69/12C01B32/198C01B32/194B01D71/02B01D71/52C02F1/44
CPCB01D67/0079B01D69/12B01D71/021B01D71/52C02F1/44C02F2101/101C02F2101/12
Inventor 孟娜
Owner XUZHOU UNIV OF TECH