Ti3C2-containing composite semipermeable membrane used for light evaporation of water, and preparation method and application of membrane

A composite semipermeable membrane and light evaporation technology, which is applied in the field of composite semipermeable membranes and new composite semipermeable membranes, can solve problems such as shedding, unfavorable light evaporation and water evaporation, and achieve low cost, good application prospects, and simple preparation processes.

Active Publication Date: 2018-05-18
SHANGHAI MARITIME UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, Li Renyuan's research group used vacuum filtration to remove Ti 3 C 2 The powder is deposited on a commercial PVDF film to prepare a light absorber with a double-layer structure. The disadvantage of the light absorb...

Method used

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  • Ti3C2-containing composite semipermeable membrane used for light evaporation of water, and preparation method and application of membrane
  • Ti3C2-containing composite semipermeable membrane used for light evaporation of water, and preparation method and application of membrane
  • Ti3C2-containing composite semipermeable membrane used for light evaporation of water, and preparation method and application of membrane

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preparation example Construction

[0027] The invention provides a Ti-containing 3 C 2 The preparation method of composite semipermeable membrane, it comprises the following steps:

[0028] Step 1, put Ti 3 AlC 2The raw materials are added to the etchant, fully stirred for 12-18 h, and the rotation speed is 800-1500 r / min to obtain a suspension, and the suspension is centrifuged (the standard for centrifugal washing of the suspension is pH > 5), and vacuum-dried; The etchant is any one of hydrofluoric acid, lithium fluoride + hydrochloric acid (that is, a mixture of lithium fluoride and hydrochloric acid), sodium hydroxide + sulfuric acid (that is, a mixture of sodium hydroxide and sulfuric acid), and ammonium bifluoride ; Preferred mass fraction is 50% hydrofluoric acid;

[0029] Step 2, put Ti 3 C 2 Mix the powder with the intercalation solvent for 15-18 h, centrifuge and dry in vacuum to prepare Ti with layered structure 3 C 2 Powder; the intercalation solvent is selected from any one of dimethyl sul...

Embodiment

[0037] Layer 73.5 mg of Ti 3 C 2 The dry powder was added to 4 mL of the above-mentioned semipermeable membrane precursor solution, and stirred thoroughly for 90 min to obtain a uniform mixed solution. Take 2 mL from the above mixed solution, add it into a 500 mL beaker with a diameter of 75 mm, and let it dry naturally to form a film. The dried composite film was taken out, cut into a circular film with a diameter of 35 mm, and a black Ti-containing film with a thickness of about 150 μm and a content of 8 mg was prepared. 3 C 2 Composite semi-permeable membrane, its actual photo is as follows figure 2 (A) shown.

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Abstract

The invention discloses a Ti3C2-containing composite semipermeable membrane used for light evaporation of water, and a preparation method and application of the membrane. The method includes the following steps that 1, a Ti3AlC2 raw material is added into an etching agent, the mixture is stirred fully, suspension liquid is obtained, and the suspension liquid is subjected to centrifuging suspensionand drying in vacuum; 2, Ti3AlC2 powder and an intercalation solvent are mixed and stirred, and the mixture is subjected to centrifuging suspension and drying in vacuum so as to prepare the Ti3AlC2 powder with a layered structure; 3, cellulose nitrate is used for preparing a semipermeable membrane precursor solution; 4, the prepared Ti3AlC2 powder with the layered structure is added in the semipermeable membrane precursor solution, the mixture is stirred evenly, uniformly spread in a flat-base container, and then naturally dried, and Ti3C2-containing composite semipermeable membrane is obtained. According to the preparation method, the process is simple, the cost is low and the practicability is high. The photothermal conversion effect of the prepared composite semipermeable membrane is good, and the composite semipermeable membrane has a very good application prospect in many fields such as light evaporation of water and water desalination.

Description

technical field [0001] The invention belongs to the technical field of membrane preparation, and relates to a composite semipermeable membrane, in particular to a semiconductor Ti 3 C 2 Combining with a semipermeable membrane, a new type of composite semipermeable membrane that can be widely used in the fields of photoevaporating water and seawater desalination is prepared. Background technique [0002] The problem of fresh water resources is a global environmental problem. At present, the shortage of fresh water resources in the world is becoming more and more serious, which has seriously threatened the survival of human beings. As fresh water resources are an indispensable necessity for human beings, it is imminent to solve the problem of shortage of fresh water resources. According to related data, nearly 97.5% of the global water resources are salt water resources such as seawater, and only 2.53% of the water is fresh water for human use. Due to development difficulties...

Claims

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Application Information

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IPC IPC(8): B01D67/00B01D69/02B01D69/12B01D71/20C02F1/14C02F1/44C02F103/08
CPCB01D67/0079B01D69/02B01D69/12B01D71/20B01D2325/22C02F1/14C02F1/44C02F2103/08Y02A20/124Y02A20/131Y02A20/142Y02A20/212
Inventor 尹宽张玉良陶富军曹胜佳王斌斌李丽
Owner SHANGHAI MARITIME UNIVERSITY
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