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Two-dimensional layered Ti3C2 film and preparation method and application thereof

A two-dimensional layered and embedded technology, which is applied in the direction of chemical instruments and methods, membranes, membrane technology, etc., can solve problems such as unusable sieving, and achieve the effects of good mechanical properties, good stability, and high application prospects

Active Publication Date: 2019-04-30
SHANDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The two-dimensional layered Ti obtained by this patent 3 C 2 -MXene membrane only has a good interception effect when dealing with ions around 3nm, for Pb with a small ion radius 2+ cannot be intercepted, so the patent cannot be used for Pb 2+ and K + the sieving

Method used

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  • Two-dimensional layered Ti3C2 film and preparation method and application thereof
  • Two-dimensional layered Ti3C2 film and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0037] (1) Under the condition of magnetic stirring, take 8g Ti 3 AlC 2 Slowly add 80ml of HF (40wt.%) solution, react at 50°C for 24h, take it out, and use deionized water to wash centrifugally (5000rpm / min, 10min) until the supernatant pH ≈ 6, and keep the lower layer of solid to obtain Ti 3 C 2 ;

[0038] (2) Take 1g Ti 3 C 2 Mix it with 20ml NaOH solution (5wt.%), stir it magnetically for 12h, take it out, wash it by centrifugation (5000rpm / min, 10min), and wash it 5 times to get the intercalated Ti 3 C 2 ;

[0039] (3) Inlay Ti 3 C 2 Add it into 100ml deionized water, sonicate for 30min (ultrasonic power is 300w), and then centrifuge (5000rpm / min, 30min) to obtain Ti 3 C 2 Colloidal solution;

[0040] (4) Under vacuum assistance, the Ti 3 C 2 The colloidal solution was deposited on a mixed cellulose ester microporous filter membrane, and dried naturally at room temperature for 5 min to obtain a two-dimensional layered Na-Ti 3 C 2 membrane.

[0041] Two-dim...

Embodiment 2

[0043] (1) Under the condition of magnetic stirring, take 8g Ti 3 AlC 2 Slowly add 100ml HF (40wt.%) solution, react at 50°C for 24h, take it out, and use deionized water to wash centrifugally (5000rpm / min, 10min) until the supernatant pH ≈ 6, and keep the lower layer solid to obtain Ti 3 C 2 ;

[0044] (2) Take 1g Ti 3 C 2 Mix with 30ml NaOH solution (5wt.%), stir magnetically for 24h, take it out, wash by centrifugation (5000rpm / min, 10min), and wash 5 times to obtain intercalated Ti 3 C 2 ;

[0045] (3) Inlay Ti 3 C 2 Add it into 100ml deionized water, sonicate for 60min (ultrasonic power is 300w), and then centrifuge (5000rpm / min, 35min) to obtain Ti 3 C 2 Colloidal solution;

[0046] (4) Under vacuum assistance, the Ti 3 C 2 The colloidal solution was deposited on a mixed cellulose ester microporous filter membrane, and dried naturally at room temperature for 5 min to obtain a two-dimensional layered Na-Ti 3 C 2 membrane.

Embodiment 3

[0048] (1) Under the condition of magnetic stirring, take 8g Ti 3 AlC 2 Slowly add 100ml HF (40wt.%) solution, react at 50°C for 30h, take it out, and use deionized water to wash centrifugally (5000rpm / min, 10min) until the supernatant pH ≈ 6, and keep the lower layer solid to obtain Ti 3 C 2 ;

[0049] (2) Take 1g Ti 3 C 2 Mix with 20ml NaOH solution (5wt.%), stir magnetically for 24h, take it out, wash by centrifugation (5000rpm / min, 10min), and wash 5 times to obtain intercalated Ti 3 C 2 ;

[0050] (3) Inlay Ti 3 C 2 Add it into 150ml deionized water, ultrasonicate for 60min (ultrasonic power is 300w), and then centrifuge (5000rpm / min, 40min) to obtain Ti 3 C 2 Colloidal solution;

[0051] (4) Under vacuum assistance, the Ti 3 C 2 The colloidal solution was deposited on a mixed cellulose ester microporous filter membrane, and dried naturally at room temperature for 5 min to obtain a two-dimensional layered Na-Ti 3 C 2 membrane.

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Abstract

The invention belongs to the technical fields of film preparation and water treatment, and in particular, relates to a two-dimensional layered Ti3C2 film and a preparation method and an application thereof. The preparation method comprises the steps: firstly, Ti3C2 is obtained by etching Ti3AlC2 with an HF solution; then the Ti3C2 is mixed with an alkali solution to prepare an embedded layer Ti3C2; then the embedded layer Ti3C2 is added into deionized water to prepare a Ti3C2 colloidal solution; and finally, the Ti3C2 colloidal solution is deposited on a porous substrate to obtain the two-dimensional layered Ti3C2 film. The two-dimensional layered Ti3C2 film obtained by ion control of the interlayer spacing has high water flux, can effectively screen K<+> and Pb<2+> in a solution, and canbe applied to water purification, solution purification and many other aspects.

Description

technical field [0001] The invention belongs to the technical field of membrane preparation and water treatment, in particular to a two-dimensional layered Ti 3 C 2 Membrane and its preparation method and application. Background technique [0002] With the rapid development of my country's economy and the continuous improvement of people's living standards, the level of industrialization is accelerating year by year, and heavy metals enter the ecological environment through various methods, and their content presents a trend of increasing year by year. Once heavy metals enter the ecological environment, they cannot be effectively degraded by microorganisms, and can exist in the ecological environment for a long time, polluting water, air, soil and other necessary resources for human life, and further endangering human health. For example, lead poisoning can cause anemia, arterial Sclerosis, peptic ulcer and fundus hemorrhage, lead poisoning in children may lead to developm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/10B01D69/02B01D71/02B01D67/00C02F1/44C02F101/20
CPCB01D67/0069B01D69/02B01D69/10B01D71/02B01D2325/24B01D2325/30C02F1/44C02F2101/20
Inventor 孟秀霞李金勇杨乃涛靳昀张维民
Owner SHANDONG UNIV OF TECH
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