High-performance two-dimensional layered Ti3C2-MXene membrane, preparation method thereof and application of membrane in water treatment

A two-dimensional layered, high-performance technology, applied in water/sludge/sewage treatment, osmotic/dialysis water/sewage treatment, water/sewage treatment, etc., can solve problems such as high cost, unstable anti-pollution ability, etc. Achieve the effect of low cost, high selectivity, and high water flux

Active Publication Date: 2016-12-07
SOUTH CHINA UNIV OF TECH
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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, preparation method thereof and application of membrane in water treatment
  • High-performance two-dimensional layered Ti3C2-MXene membrane, preparation method thereof and application of membrane in water treatment
  • High-performance two-dimensional layered Ti3C2-MXene membrane, preparation method thereof and application of membrane in water treatment

Examples

Experimental program
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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 HF solution was 20%), stirred at room temperature for 2 hours (rotation speed was 500rpm), then centrifuged and washed 3 times with deionized water, 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) nanosheets; ...

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] 本发明属于膜制备以及水净化的技术领域,涉及一种二维材料,具体涉及一种高性能二维层状Ti 3 C 2 -MXene膜及其制备方法与在水处理中的应用。 Background technique [0002] 水是地球所有生命生存的基础。工业经济的高速发展,给社会带来了巨大的进步,同时带来了一系列严重的问题。在众多问题中,水污染的问题尤为突出。尤其是中国这个人均水资源低于世界平均水平的国家,节约用水以及对污水的净化处理有极其重要的战略意义,同时对于人类实现可持续发展有着重要的现实意义。 [0003] 在现有的水处理技术中,相对于传统分离技术,由于膜分离技术具有高分离效率,低能耗和低成本而越来越受到人们的关注,并且应用也越来越广泛。然而,传统的有机聚合物膜由于成本优势而应用比较广泛,但是存在抗腐蚀能力差和机械性能差的问题。陶瓷膜虽然耐腐蚀,机械强度高,但是成本也高,极大的限制了其应用。 [0004] 近年来新出现的二维膜具有机械强度高,热稳定性和化学稳定性优良,操作简单可控性好等特点,逐渐成为了科学家的研究热点。同时,研究表明,二维膜的分离性能要远高于传统膜。目前,二维膜材料主要有石墨烯 / 氧化石墨烯材料和类石墨烯材料两大类。其中二维石墨烯 / 氧化石墨烯膜近年来研究很广泛,但是其缺点也是很明显的,主要包括制备过程的成本高,在水溶液中不稳定和抗污染能力较差。 [0005] 如何制备出一种低成本、高水通量高选择性和分离效率高的膜材料已逐渐成为人们研究的重点。 Contents of the invention [0006] 为了克服现有技术的缺点和不足,本发明的首要目的在于提供一种高性能二维层状Ti 3 C 2 -MXene膜的制备方法。所述高性能二维层状Ti 3 C 2 -MXene膜能在水溶液中稳定存在。 [0007] 本发明的另一目的在于提供由上述方法制备得到的高性能二维层状Ti 3 C 2 -MXene膜。所述二维层状Ti 3 C 2 -MXene膜具有高水通量和高选择性。 [0008] 本发明的再一目的在于提供上述高性能二维层状Ti 3 C 2 -MXene膜的应用。所述高性能二维层状Ti 3 C 2 -MXene膜用于水净化处理。 ...

Claims

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Application Information

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Patent Type & Authority Applications(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
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