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High-performance two-dimensional layered ti3c2-mxene membrane and its preparation method and application in water treatment

A two-dimensional layered, high-performance technology, applied in water/sewage treatment, water/sludge/sewage treatment, permeation/dialysis water/sewage treatment, etc., can solve the problems of unstable anti-pollution ability and high cost, and achieve The effect of low cost, high water flux, and good application prospects

Active Publication Date: 2019-04-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, two-dimensional graphene / graphene oxide film has been widely studied in recent years, but its shortcomings are also obvious, mainly including high cost of preparation process, instability in aqueous solution and poor anti-pollution ability.

Method used

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  • High-performance two-dimensional layered ti3c2-mxene membrane and its preparation method and application in water treatment
  • High-performance two-dimensional layered ti3c2-mxene membrane and its preparation method and application in water treatment
  • High-performance two-dimensional layered ti3c2-mxene membrane and its preparation method and application in water treatment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] A high-performance two-dimensional layered Ti 3 C 2 -The preparation method of MXene film, comprises the following steps:

[0049] (1) 10g Ti 3 AlC 2 The powder was mixed with 30mL HF solution (the volume concentration of the HF solution was 20%), stirred at room temperature for 2 hours (rotation speed was 500rpm), then centrifuged and washed with deionized water for 3 times, and dried at 100°C for 12 hours to obtain Ti 3 C 2 powder;

[0050] (2) 1gTi 3 C 2 The powder was mixed with 5 mL dimethyl sulfoxide, stirred at room temperature for 2 hours (200 rpm), washed 3 times with deionized water, and dried at 100 °C for 12 hours to obtain the treated Ti 3 C 2 powder;

[0051] (3) Take 1g of treated Ti 3 C 2 The powder was dissolved in a mixed solution of 60mL methanol and 140mL water, ultrasonicated for 2 hours (ultrasonic power 400W), centrifuged at 8000rpm for 20min, the supernatant was taken and freeze-dried to obtain a two-dimensional Ti 3 C 2 (MXene) nano...

Embodiment 2

[0056] A high-performance two-dimensional layered Ti 3 C 2 -The preparation method of MXene film, comprises the following steps:

[0057] (1) Add 6g Ti 3 AlC 2 The powder was mixed with 85mL HF solution (the volume concentration of HF solution was 10%), stirred at room temperature for 4 hours (rotational speed was 200rpm), then washed twice with deionized water, and dried at 50°C for 24 hours to obtain Ti 3 C 2 powder;

[0058] (2) 5g Ti 3 C 2 The powder was mixed with 20 mL of dimethyl sulfoxide, stirred at room temperature for 10 hours (300 rpm), washed three times with deionized water, and dried at 80 °C for 16 hours to obtain the treated Ti 3 C 2 powder;

[0059] (3) Take 2g of treated Ti 3 C 2 The powder was dissolved in a mixed solution of 100mL methanol and 300mL water, ultrasonicated for 4 hours (ultrasonic power 300W), centrifuged (8000rpm for 20min), and the supernatant was taken and freeze-dried to obtain a two-dimensional Ti 3 C 2 (MXene) nanosheets, t...

Embodiment 3

[0065] A high-performance two-dimensional layered Ti 3 C 2 -The preparation method of MXene film, comprises the following steps:

[0066] (1) Put 8gTi 3 AlC 2 The powder was mixed with 80mL HF solution (the volume concentration of the HF solution was 40%), stirred at room temperature for 8 hours (rotational speed was 200rpm), then centrifuged and washed 3 times with deionized water, and dried at 100°C for 24 hours to obtain Ti 3 C 2 powder;

[0067] (2) Put 2gTi 3 C 2 The powder was mixed with 10 mL of dimethyl sulfoxide, stirred at room temperature for 36 hours (300 rpm), washed three times with deionized water, and dried at 60°C for 24 hours to obtain the treated Ti 3 C 2 powder;

[0068] (3) Take 1g of treated Ti 3 C 2 The powder was dissolved in a mixed solution of 50mL methanol and 200mL water, ultrasonicated for 8 hours (ultrasonic power 300W), centrifuged, the supernatant was taken, and freeze-dried to obtain a two-dimensional Ti 3 C 2 (MXene) nanosheets; ...

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Abstract

The invention belongs to the technical field of membrane preparation and water purification and discloses a high-performance two-dimensional layered Ti3C2-MXene membrane, a preparation method thereof and an application of the Ti3C2-MXene membrane in water treatment. The method comprises steps as follows: (1), Ti3AlC2 powder and an HF solution are mixed, stirred for a reaction, centrifugally washed and dried, and Ti3C2 powder is obtained; (2), the Ti3C2 powder and a solvent are mixed, stirred for the reaction, washed and dried, and treated powder is obtained; (3), the treated powder is dissolved in the solvent and subjected to ultrasonic treatment and centrifugation, a liquid supernatant is taken and dried, and a two-dimensional nanosheet is obtained; (4), a solution is prepared from the two-dimensional nanosheet and deposited on a porous substrate with a nano self-assembly technology, and the high-performance two-dimensional layered Ti3C2-MXene membrane is obtained. The membrane has ultrahigh water flux, higher selectivity and good mechanical property and stability; the method is simple, low in energy consumption and cost, good in repeatability and wide in applicability.

Description

technical field [0001] The invention belongs to the technical field of membrane preparation and water purification, relates to a two-dimensional material, in particular to a high-performance two-dimensional layered Ti 3 C 2 -MXene membrane and its preparation method and application in water treatment. 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, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D69/12B01D67/00C02F1/44
CPCB01D67/0079B01D69/12C02F1/444
Inventor 王海辉丁力王艳杰魏嫣莹王莹方峻祺
Owner SOUTH CHINA UNIV OF TECH