Aluminum ion cross-linked MXene-ascorbic acid membrane and preparation method thereof

A technology of ascorbic acid and aluminum ions, applied in chemical instruments and methods, membranes, membrane technology, etc., can solve the problems of easy oxidation, easy swelling of MXene membranes, etc., and achieve high removal rate, good promotion, high stability and good effect

Active Publication Date: 2021-06-15
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of this invention is to provide a kind of aluminum ion cross-linked MXene-ascorbic acid film and preparation method thereof, to solve the problems of easy swelling and easy oxidation of MXene film in the above-mentioned prior art, so that the prepared MXene film has high stability and high Removal rate

Method used

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  • Aluminum ion cross-linked MXene-ascorbic acid membrane and preparation method thereof
  • Aluminum ion cross-linked MXene-ascorbic acid membrane and preparation method thereof
  • Aluminum ion cross-linked MXene-ascorbic acid membrane and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Step 1: Mix 2g LiF and 40mL of 9mol / L hydrochloric acid in a polytetrafluoroethylene test tube and sonicate for 30min, and mix 2g of 400 mesh Ti 3 AlC 2 Added to the mixed solution of HCl-LiF, reacted at 40°C for 24h, then shaken under argon atmosphere for 1h and centrifuged at 4000rpm for 1h, and obtained single-layer MXene nanosheets in the supernatant;

[0042] Step 2: Prepare a 1 mg / mL MXene solution by adding deionized water to the monolayer MXene nanosheets, then add 1.0 mmol / L ascorbic acid and stir in an argon atmosphere for 24 hours to obtain a mixed solution of MXene-ascorbic acid;

[0043] Step 3: Add 10mL of 1.0mg / mL MXene-ascorbic acid mixed solution into 40mL of deionized water, carry out dead-end filtration in an ultrafiltration cup with a nitrogen pressure of 0.1MPa, and load MXene-ascorbic acid onto 100kd polyethersulfone ( PES) film surface, obtain MXene-ascorbic acid film (MVC);

[0044] Step 4: Soak the MXene-ascorbic acid membrane in a 0.2 mol / L a...

Embodiment 2

[0063] Step 1: Mix 2g of LiF and 31mL of 9mol / L hydrochloric acid in a polytetrafluoroethylene test tube and sonicate for 30min, and 2g of 300 mesh Ti 3 AlC 2 Added to the mixed solution of HCl-LiF, reacted at 30°C for 30h, then shaken under argon atmosphere for 1h and centrifuged at 4000rpm for 1h, and obtained single-layer MXene nanosheets in the supernatant;

[0064] Step 2: Prepare a 1 mg / mL MXene solution by adding deionized water to the single-layer MXene nanosheets, then add 0.1 mmol / L ascorbic acid and stir in an argon atmosphere for 12 hours to obtain a mixed solution of MXene-ascorbic acid;

[0065] Step 3: Add 10mL of 1.0mg / mL MXene-ascorbic acid mixed solution into 40mL of deionized water, carry out dead-end filtration in an ultrafiltration cup with a nitrogen pressure of 0.1MPa, and load MXene-ascorbic acid onto 100kd polyethersulfone ( PES) film surface, obtain MXene-ascorbic acid film (MVC);

[0066] Step 4: Soak the MXene-ascorbic acid membrane in a 0.1 mol / L...

Embodiment 3

[0068] Step 1: Mix 2g LiF and 48mL of 9mol / L hydrochloric acid in a polytetrafluoroethylene test tube and sonicate for 30min, and 2g 500 mesh Ti 3 AlC 2 Added to the mixed solution of HCl-LiF, reacted at 35°C for 48h, then shaken under argon atmosphere for 1h and centrifuged at 4000rpm for 1h, and obtained single-layer MXene nanosheets in the supernatant;

[0069] Step 2: Prepare a 1 mg / mL MXene solution by adding deionized water to the single-layer MXene nanosheets, then add 10 mmol / L ascorbic acid and stir in an argon atmosphere for 48 hours to obtain a MXene-ascorbic acid mixed solution;

[0070] Step 3: Add 10mL of 1.0mg / mL MXene-ascorbic acid mixed solution into 40mL of deionized water, carry out dead-end filtration in an ultrafiltration cup with a nitrogen pressure of 0.1MPa, and load MXene-ascorbic acid onto 100kd polyethersulfone ( PES) film surface, obtain MXene-ascorbic acid film (MVC);

[0071] Step 4: Soak the MXene-ascorbic acid membrane in a 1mol / L aluminum chl...

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Abstract

The invention discloses an aluminum ion cross-linked MXene-ascorbic acid membrane and a preparation method thereof, and belongs to the field of environment-friendly water treatment. According to the invention, ascorbic acid and aluminum ions are utilized to carry out composite cross-linking on MXene nanosheets to load the MXene nanosheets to the surface of a 100kd polyethersulfone membrane. The aluminum ion cross-linked MXene-ascorbic acid membrane prepared by the invention has excellent oxidation resistance, can stably operate in water for a long time, intercepts pollutants in water through a size exclusion effect, and also can effectively inhibit permeation of sodium chloride ions in a forward osmosis process. The method is simple and easy to operate, easy for large-scale application and beneficial to popularization.

Description

technical field [0001] The invention relates to the field of environmental protection water treatment, in particular to an aluminum ion cross-linked MXene-ascorbic acid membrane and a preparation method thereof. Background technique [0002] The water quality and quantity of global water resources are deteriorating day by day, and membrane technology has attracted more and more attention. In terms of water treatment, the main membrane technologies used include microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), reverse osmosis (RO) and forward osmosis (FO). However, these membranes still face some problems and challenges in the field of water treatment, such as low pollutant rejection rate, poor membrane mechanical properties, high energy consumption, and some membrane materials are not resistant to chlorine, etc. Transition carbon (nitride) compounds (MXene) are a new class of two-dimensional materials successfully prepared in 2011. The two-dimensional membra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D67/00B01D69/02B01D69/12B01D71/02B01D71/06B01D71/68C02F1/28C02F1/44C02F101/30
CPCB01D67/0079B01D69/02B01D71/68B01D69/12B01D71/06B01D71/02C02F1/44C02F1/288B01D2325/30C02F2101/308
Inventor 刘婷刘勋孙克宁
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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