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Metal ion-doped graphene oxide composite film, and preparation method and application thereof

A graphene composite and metal ion technology, applied in separation methods, chemical instruments and methods, membrane technology, etc., can solve problems such as difficult to effectively separate alkenes and alkanes, and achieve efficient and economical separation and purification, low energy consumption, and low investment Effect

Pending Publication Date: 2021-06-15
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] In view of the above-mentioned shortcoming of the prior art, the object of the present invention is to provide a metal ion-doped graphene oxide composite membrane and its preparation method and the application of the metal-doped graphene oxide composite membrane in the separation of olefins and alkanes , used to solve the problems that the existing technology is difficult to effectively realize the separation of alkenes and alkanes

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  • Metal ion-doped graphene oxide composite film, and preparation method and application thereof
  • Metal ion-doped graphene oxide composite film, and preparation method and application thereof
  • Metal ion-doped graphene oxide composite film, and preparation method and application thereof

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preparation example Construction

[0036] like figure 1 Shown, the present invention provides a kind of preparation method of the graphene oxide composite film of metal ion doping, and described preparation method comprises:

[0037] S1, providing graphene oxide, dispersing the graphene oxide in water to obtain a graphene oxide dispersion;

[0038] S2, providing a porous ceramic carrier;

[0039] S3, preparing a graphene oxide film on the porous ceramic carrier based on the graphene oxide dispersion;

[0040] S4, providing a metal salt, and dissolving the metal salt in water to obtain a metal salt solution;

[0041] S5, immersing the graphene oxide film in the metal salt solution for a preset time to obtain a metal ion-doped graphene oxide composite film.

[0042] The preparation method of the metal ion-doped graphene oxide composite film of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein, it should be noted that the above sequence does not stric...

Embodiment 1

[0069] Step 1: Add 25 mg of graphene oxide into 100 mL of ultrapure water, and ultrasonically crush it for 1 hour at room temperature to form a 0.4 mg / mL GO dispersion;

[0070] Step 2: Select a porous titanium oxide ceramic tube as the carrier. The outer and inner diameters of the porous ceramic tube are 10mm and 7mm respectively, and the average pore diameter of the inner surface is 5nm. Both ends of the carrier are sealed with glaze, and the effective film length is 25mm. Roasting 0.5h;

[0071] Step 3: Using the filter press deposition method, put the ceramic tube into the membrane module, pass the graphene oxide hydrosol from the inside of the membrane tube, use a certain pressure of nitrogen as the driving force, the pressure range is 1-15bar, and place the membrane tube at room temperature for 2 hours;

[0072] Step 4: Immerse the membrane tube in step 3 in 0.25mol / L Cu(BF4) 2 1h in aqueous solution, vacuum drying at 45°C for 12h;

[0073] Step 5: Use a gas permeation...

Embodiment 2

[0076] The difference from Example 1 is that in step 4, the membrane tube is immersed in 0.25mol / L CuCl 2 1h in aqueous solution. All the other steps are the same as in Example 1. The separation test results are shown in Table 1.

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Abstract

The invention provides a metal ion-doped graphene oxide composite film, and a preparation method and application thereof. The preparation method comprises the following steps: preparing a graphene oxide dispersion liquid, preparing a graphene oxide film on a porous ceramic carrier based on the graphene oxide dispersion liquid, and dipping the graphene oxide film structure in a metal salt solution so as to obtain the metal ion-doped graphene oxide composite film. According to the method, the graphene oxide film is formed through control, metal ion doping is conducted on the graphene oxide film in the corresponding metal salt solution through an impregnation method, effective ion-pi effect can be formed through the above technical scheme, and the metal ions are introduced into the graphene oxide film through the ion-pi effect, so the purpose of separating olefin from alkane is achieved; and the graphene oxide composite film has high gas flux and can effectively separate olefin and alkane, and the preparation method has characteristics of simple operation, low energy consumption and low investment.

Description

technical field [0001] The invention belongs to the technical field of chemical separation, and in particular relates to a metal ion-doped graphene oxide composite membrane and a preparation method thereof, and the application of the metal-doped graphene oxide composite membrane in the separation of olefins and alkanes. Background technique [0002] Light olefins (ethylene and propylene) are important industrial raw materials for the production of polyolefins, alcohols, ethers and other products. The main source of olefins is petroleum cracking gas, usually olefins and alkanes are produced at the same time, and they need to be separated and purified to meet the needs of industrial production. Ethane and ethylene, propane and propylene have similar molecular sizes and small differences in physical properties. Therefore, the separation of alkenes and alkanes is a major challenge. [0003] Traditional olefin / alkane separation techniques such as rectification have poor selectiv...

Claims

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Application Information

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IPC IPC(8): B01D71/02B01D69/12B01D67/00B01D53/22C07C7/144C07C11/04C07C11/06C07C9/06C07C9/08
CPCB01D71/021B01D69/12B01D67/0039B01D53/228C07C7/144
Inventor 曾高峰杨京京孙予罕
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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