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Preparation method of two-dimensional MXene-based self-cleaning ultrafiltration membrane

An ultrafiltration membrane and self-cleaning technology, which is applied in the field of membrane separation, can solve the problems of fouling on the membrane surface, reducing membrane flux and filtration performance, and achieve membrane pollution mitigation, excellent flux and pollution interception ability, and strong industrial application value effect

Pending Publication Date: 2022-07-22
NANJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies in the prior art, and provides a method for preparing a two-dimensional MXene-based self-cleaning ultrafiltration membrane, to solve the problem that dirt will inevitably be generated on the membrane surface during the water treatment operation in the prior art, thereby The technical problems such as membrane flux and filtration performance are reduced, and the present invention provides a MXene-based self-cleaning ultrafiltration membrane, which has stable flux and anti-pollution ability, and also has antibacterial and self-cleaning ability under ultraviolet light, so that it can To a certain extent, it has the advantages of alleviating the phenomenon of membrane fouling in the process of membrane separation.

Method used

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  • Preparation method of two-dimensional MXene-based self-cleaning ultrafiltration membrane

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Embodiment 1

[0033] Embodiment 1 discloses a preparation method of a two-dimensional MXene-based self-cleaning ultrafiltration membrane, comprising the following steps:

[0034] Step 1: Put 3.2g of lithium fluoride into a 100ml beaker, add 40mL of 9mol / L hydrochloric acid, put it on a constant temperature magnetic stirrer at 40°C, stir at 500-600rpm for 15min, then add 2g of MAX material to the solution, at 40°C React with 500-600rpm for 48 hours. After the reaction is completed, centrifuge in a 3500rpm centrifuge for 3min, discard the supernatant, pour into 1M dilute hydrochloric acid for washing, centrifuge under the same conditions, discard the supernatant, and repeat the washing twice. Then wash and centrifuge with deionized water and ethanol respectively, each repeating 3 times, after centrifugation, the solution is suction filtered to obtain multi-layer Ti3C2;

[0035] Step 2: Preparation of monolayer Ti3C2 material: put the precipitate on the filter membrane into a centrifuge tube, ...

Embodiment 2

[0042] Embodiment 2 discloses a preparation method of a two-dimensional MXene-based self-cleaning ultrafiltration membrane, comprising the following steps:

[0043] Step 1: Put 2g of lithium fluoride into a 100ml beaker, add 40mL of 9mol / L hydrochloric acid, put it on a constant temperature magnetic stirrer at 40°C, stir at 500-600rpm for 15min, then add 1g of MAX material to the solution, at 40°C and 500 -React at -600rpm for 48 hours. After the reaction is completed, centrifuge in a centrifuge at 3500rpm for 3min, discard the supernatant, pour into 1M dilute hydrochloric acid for washing, centrifuge under the same conditions, discard the supernatant, repeat the washing twice, and then separate Washing with deionized water and ethanol and centrifuging, each repeated 3 times, after centrifugation, the solution was suction filtered to obtain multi-layer Ti3C2;

[0044] Step 2: Preparation of monolayer Ti3C2 material: put the precipitate on the filter membrane into a centrifuge ...

Embodiment 3

[0051] Embodiment 3 discloses a preparation method of a two-dimensional MXene-based self-cleaning ultrafiltration membrane, comprising the following steps:

[0052] Step 1: Put 3.2g of lithium fluoride into a 100ml beaker, add 40mL of 9mol / L hydrochloric acid, put it on a constant temperature magnetic stirrer at 40°C, stir at 500-600rpm for 15min, then add 2g of MAX material to the solution, at 40°C React with 500-600rpm for 48 hours. After the reaction is completed, centrifuge in a 3500rpm centrifuge for 5min, discard the supernatant, pour into 1M dilute hydrochloric acid for washing, centrifuge under the same conditions, discard the supernatant, and repeat the washing twice. Then wash and centrifuge with deionized water and ethanol respectively, each repeating 3 times, after centrifugation, the solution is suction filtered to obtain multi-layer Ti3C2;

[0053] Step 2: Preparation of single-layer Ti3C2 material: put the precipitate on the filter membrane into a centrifuge tub...

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Abstract

The invention discloses a preparation method of a two-dimensional MXene-based self-cleaning ultrafiltration membrane, which comprises the following steps: 1, stirring and dissolving lithium fluoride and hydrochloric acid, stirring on a constant-temperature magnetic stirrer, adding an MAX material, selectively etching Al atoms, centrifuging, washing, and filtering on a filter membrane to obtain multiple layers of MXene; and 2, putting the precipitate on the filter membrane into a centrifuge tube again, filling nitrogen to remove oxygen, carrying out ultrasonic treatment and centrifugation, taking the supernatant, and drying to prepare the single-layer MXene material. The problems that in the water treatment operation process in the prior art, dirt is inevitably generated on the surface of a membrane, and therefore the membrane flux and the filtering performance are reduced are solved. The MXene-based self-cleaning ultrafiltration membrane provided by the invention has the advantages that the MXene-based self-cleaning ultrafiltration membrane has stable flux and anti-pollution capacity, and also has antibacterial and self-cleaning capacity under ultraviolet light, so that the phenomenon of membrane pollution in a membrane separation process can be relieved to a certain extent, and the like.

Description

technical field [0001] The invention relates to the technical field of membrane separation, in particular to a preparation method of a two-dimensional MXene-based self-cleaning ultrafiltration membrane. Background technique [0002] Membrane-based water treatment has become a common technology to solve water environmental problems because of its high efficiency and environmental protection characteristics. In the actual water treatment application process, some pollutants in the water body, especially the existence of hydrophobic proteins and cells, will affect the water environment. As a result, a large number of pollutants adhere to the membrane surface, reducing the membrane flux and filtration performance. Therefore, the membrane fouling problem has become the main problem restricting the development of membrane technology. However, in the process of water treatment, the membrane surface will eventually produce fouling. , In order to fundamentally solve the problem of me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D69/02B01D67/00C02F1/44
CPCB01D71/02B01D69/02B01D67/0039B01D67/0079C02F1/444
Inventor 尤朝阳赵昌龙蒋昂瑞孙永军王金龙陈雷刘安康
Owner NANJING UNIV OF TECH
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