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Application of two-dimensional MXene film in separating water from isopropyl alcohol

A technology of isopropanol and aqueous solution, which is applied in the field of nano-membrane and liquid separation, can solve the problems of difficult balance between selectivity and permeation, poor stability, etc., and achieve the effect of great application value, low cost and simple preparation

Inactive Publication Date: 2018-07-20
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the traditional liquid separation membranes that can be commercialized include polymer membranes and molecular sieve membranes, which have defects such as poor stability, difficulty in balancing selectivity and permeation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A preparation method for a two-dimensional MXene film, comprising the following steps:

[0031] (1) Add 8g lithium fluoride to 200mL 6mol L -1 hydrochloric acid solution, stir evenly, then add 5gTi 3 AlC 2 powder, stirred and reacted for 48 hours, centrifuged and washed at 2500rpm until the pH of the upper solution was neutral, and then dried at 50°C for 48 hours to obtain Ti 3 C 2 powder;

[0032] (2) Add 0.1g Ti 3 C 2 The powder was added to 500mL deionized water, ultrasonicated for 1 hour, centrifuged at 2500rpm for 1 hour, and the upper liquid was absorbed to obtain a solution of two-dimensional MXene nanosheets with a concentration of 0.1mg / mL;

[0033] (3) Take 10mL of the MXene nanosheet solution obtained in step (2), and use a vacuum filtration device to stack the MXene nanosheets on a nylon 66 substrate with a pore size of 200nm and a diameter of 50mm, and then dry it in a blast drying oven at 100°C After 10 hours, a two-dimensional MXene film with a thi...

Embodiment 2

[0038] A preparation method for a two-dimensional MXene film, comprising the following steps:

[0039] (1) Add 8g lithium fluoride to 200mL 6mol L -1 hydrochloric acid solution, stir evenly, then add 5gTi 3 AlC 2 powder, stirred and reacted for 48 hours, centrifuged and washed at 2500rpm until the pH of the upper solution was neutral, and then dried at 50°C for 48 hours to obtain Ti 3 C 2 powder;

[0040] (2) Add 3g Ti 3 C 2 Add the powder into 500mL deionized water for 1 hour, centrifuge at 2500rpm for 1 hour, absorb the upper liquid to obtain a solution of two-dimensional MXene nanosheets, the concentration is 5mg / mL;

[0041] (3) Take 50mL of the MXene nanosheet solution obtained in step (2), and use a vacuum filtration device to stack the MXene nanosheets on a nylon 66 substrate with a pore size of 200nm and a diameter of 50mm, and then dry it in a 100°C blast drying oven After 10 hours, a two-dimensional MXene film with a thickness of 5 mm was obtained.

[0042] T...

Embodiment 3

[0046] A preparation method for a two-dimensional MXene film, comprising the following steps:

[0047] (1) Add 8g lithium fluoride to 200mL 6mol L -1 hydrochloric acid solution, stir evenly, then add 5gTi 3 AlC 2powder, stirred and reacted for 48 hours, centrifuged and washed at 2500rpm until the pH of the upper solution was neutral, and then dried at 50°C for 48 hours to obtain Ti 3 C 2 powder;

[0048] (2) Put 10g Ti 3 C 2 The powder was added to 500mL deionized water, ultrasonicated for 1 hour, centrifuged at 2500rpm for 1 hour, and the upper liquid was absorbed to obtain a solution of two-dimensional MXene nanosheets with a concentration of 15mg / mL;

[0049] (3) Take 50mL of the MXene nanosheet solution obtained in step (2), and use a vacuum filtration device to stack the MXene nanosheets on a nylon 66 substrate with a pore size of 200nm and a diameter of 50mm, and then dry it in a blast drying oven at 150°C After 10 hours, a two-dimensional MXene film with a thickn...

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Abstract

The invention discloses application of a two-dimensional MXene film in separating water from isopropyl alcohol and belongs to the technical fields of preparation of two-dimensional nanofilms and liquid separation. The application comprises the following steps: firstly, putting the two-dimensional MXene film into a pervaporation device and adding an isopropanol aqueous solution into the raw material side; secondly, vacuumizing the penetration side by adopting a vacuum pump and introducing penetrated vapor into a cold trap for condensing; thirdly, collecting penetrating fluid in the cold trap and detecting the concentration of the penetrating fluid by using gas chromatography. According to the application of the two-dimensional MXene film in separating the water from the isopropyl alcohol, disclosed by the invention, the two-dimensional MXene film which has good mechanical properties and excellent separation properties is put into the pervaporation device for separating the water from the isopropyl alcohol; the two-dimensional MXene film has high selectivity and good chemical stability as well as industrial application potential in the field of liquid separation.

Description

technical field [0001] The invention belongs to the technical field of nanometer membrane and liquid separation, and in particular relates to the application of a two-dimensional MXene membrane in the separation of water and isopropanol. Background technique [0002] With the shortage of global resources and the increasingly serious form of environmental pollution, people are constantly pursuing high-efficiency and energy-saving chemical production methods. Separation is a very important link in the chemical production process. In the field of liquid separation, traditional separation methods such as rectification are complex in operation and consume a lot of energy. However, the membrane separation method that has emerged in the past decade has significant advantages, which can greatly reduce energy consumption and improve separation efficiency, which has become a new direction for future development. [0003] Isopropanol is an important chemical raw material, mainly used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D61/36B01D17/02
CPCB01D17/085B01D61/362B01D71/024
Inventor 王海辉吴艺魏嫣莹丁力
Owner SOUTH CHINA UNIV OF TECH
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