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2D layered ti 3 c 2 Membrane and its preparation method and application

A two-dimensional layered and embedded technology, which is applied in chemical instruments and methods, water/sludge/sewage treatment, permeation/dialysis water/sewage treatment, etc., can solve problems such as unusable screening and achieve good mechanical properties , low cost of raw materials, high efficiency

Active Publication Date: 2021-08-13
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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  • 2D layered ti <sub>3</sub> c <sub>2</sub> Membrane and its preparation method and application
  • 2D layered ti <sub>3</sub> c <sub>2</sub> Membrane and its preparation method and application

Examples

Experimental program
Comparison scheme
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 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. Its preparation method is to first use HF solution to etch Ti 3 AlC 2 , get Ti 3 C 2 ; Then Ti 3 C 2 Mix with lye to prepare intercalated Ti 3 C 2 ; then the embedded Ti 3 C 2 Added to deionized water to prepare Ti 3 C 2 colloidal solution; finally Ti 3 C 2 The colloidal solution is deposited onto the porous substrate to obtain a two-dimensional layered Ti 3 C 2 membrane. The present invention adopts the two-dimensional layered Ti obtained by controlling the interlayer spacing by ions 3 C 2 The membrane has high water flux and can effectively screen K in solution + and Pb 2+ , can be 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 Patents(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