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Spindle-shaped MXene-carbon nanotube two-dimensional film as well as preparation method and application thereof

A technology of carbon nanotubes and single-walled carbon nanotubes, applied in the field of spindle-shaped MXene-carbon nanotube two-dimensional membranes and its preparation, can solve the problems of unstable anti-pollution ability, inability to be widely used, and low water flux , to achieve high selectivity, wide applicability and high separation efficiency

Active Publication Date: 2021-04-02
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, two-dimensional graphene / graphene oxide films have been widely studied in recent years, but their shortcomings are also obvious, mainly including high cost of preparation process, instability in aqueous solution and poor anti-pollution ability.
In addition, the water flux of existing graphene membranes is generally low, and the phenomenon of trade off is serious, so it is still not widely used in water treatment.

Method used

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  • Spindle-shaped MXene-carbon nanotube two-dimensional film as well as preparation method and application thereof
  • Spindle-shaped MXene-carbon nanotube two-dimensional film as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A kind of spindle-shaped MXene-carbon nanotube two-dimensional membrane, comprises support layer and separation function layer, and described support layer is positioned at separation function layer below; A two-dimensional stacked membrane with spindle-shaped channels, the thickness of the separation functional layer is 500-1000 microns.

[0034] A preparation method for a spindle-shaped MXene-carbon nanotube two-dimensional film, comprising the following steps:

[0035] Step 1, mix 1g LiF powder with 30ml 6M hydrochloric acid solution, then mix 1g Ti 3 AlC 2 Slowly add the powder to the above mixed solution, stir at 35°C at a speed of 300rpm for 24 hours to obtain a dispersion A, then centrifuge the dispersion A, and then wash the precipitate with deionized water for 7 times until the pH is neutral. The precipitate was redispersed with deionized water, placed in a beaker, and after being stripped under ultrasonic conditions for 30 minutes, the above solution was cen...

Embodiment 2

[0044] A kind of spindle-shaped MXene-carbon nanotube two-dimensional film, comprises support layer and separation function layer, and described support layer is positioned at separation function layer below; Described separation function layer is formed by MXene and carboxylated multi-walled carbon nanotube A two-dimensional stacked membrane with spindle-shaped channels, the thickness of the separation functional layer is 500-1000 microns.

[0045] A preparation method for a spindle-shaped MXene-carbon nanotube two-dimensional film, comprising the following steps:

[0046] Step 1, 1.2 g LiF powder was mixed with 30 ml 9M hydrochloric acid solution, and then 1 g Ti 3 AlC 2 Add the powder slowly to the above mixed solution, stir at 35°C at a speed of 300rpm for 24 hours to obtain dispersion A, then centrifuge dispersion A, and then centrifuge and wash the precipitate with deionized water 7 times until the pH of the washing solution is neutral. The obtained precipitate was red...

Embodiment 3

[0055] A kind of spindle-shaped MXene-carbon nanotube two-dimensional film, comprises support layer and separation function layer, and described support layer is positioned at separation function layer below; Described separation function layer is formed by MXene and carboxylated multi-walled carbon nanotube A two-dimensional stacked membrane with spindle-shaped channels, the thickness of the separation functional layer is 500-1000 microns.

[0056] A preparation method for a spindle-shaped MXene-carbon nanotube two-dimensional film, comprising the following steps:

[0057] Step 1, 1.2 g LiF powder was mixed with 30 ml 9M hydrochloric acid solution, and then 1 g Ti 3 AlC 2 The powder was slowly added to the above mixed solution, stirred at 35°C at a speed of 300rpm for 24 hours to obtain dispersion A, and then the dispersion A was centrifuged, and then washed with deionized water for 7 times until the pH was neutral. The precipitate was redispersed with 100 mL deionized wate...

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Abstract

The invention relates to a spindle-shaped MXene-carbon nanotube two-dimensional film as well as a preparation method and application thereof. The two-dimensional nanofiltration membrane is formed by stacking on a porous polymer supporting layer through a composite assembly process by taking an MXene sheet layer as a membrane skeleton and taking a carbon nanotube as a membrane pore passage regulation material. The prepared nanofiltration membrane is stored in deionized water for later use. By means of the method, the spindle-shaped pore channel structure can be effectively constructed. The nanofiltration membrane prepared by the invention has ultrahigh water flux and micromolecular organic dye rejection rate, strong stability and high mechanical strength. The preparation method is simple and easy to implement, high in controllability, low in production cost and free of pollution, and has great application prospects.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a spindle-shaped MXene-carbon nanotube two-dimensional film and its preparation method and application. Background technique [0002] Water is the basis for the survival of all life on Earth. The rapid development of industrial economy has brought great progress to the society, but at the same time brought a series of serious problems. Among the many problems, the problem of water pollution is particularly prominent. Especially in China, a country whose per capita water resources are lower than the world's average level, water conservation and sewage purification are of extremely important strategic significance, and at the same time have important practical significance for human beings to achieve sustainable development. [0003] In the existing water treatment technology, compared with the traditional separation technology, membrane separation technology has attract...

Claims

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Application Information

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IPC IPC(8): B01D61/02B01D67/00B01D69/04B01D69/10C02F1/44C02F101/36C02F101/38
CPCB01D61/027B01D69/043B01D69/10B01D69/105B01D67/0079C02F1/442C02F2101/40C02F2101/38C02F2101/36
Inventor 丁明梅许航孔庆陈卫杨文
Owner HOHAI UNIV
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