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MXene nanowire composite electrospinning fiber membrane for photothermal desalting

A technology of electrospun fibers and nanowires, applied in the field of water treatment, can solve the problems of increasing the complexity of the membrane distillation system, unfavorable engineering development, poor absorption capacity, etc., and achieves convenience for large-scale production and use, high mechanical strength, and improved The effect of absorption rate

Inactive Publication Date: 2018-01-05
CHINA UNIV OF GEOSCIENCES (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, direct heating of water by sunlight is less efficient because water absorbs solar energy poorly
The installation of solar collectors and heat exchangers will inevitably increase the complexity of the membrane distillation system, which is not conducive to engineering development

Method used

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  • MXene nanowire composite electrospinning fiber membrane for photothermal desalting
  • MXene nanowire composite electrospinning fiber membrane for photothermal desalting
  • MXene nanowire composite electrospinning fiber membrane for photothermal desalting

Examples

Experimental program
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Effect test

no. 1 example

[0035] The MXene nanowire composite electrospun fiber membrane for photothermal desalination is prepared by the following steps: taking Ti 3 AlC 2 2.15g, added to dilute HCl with a mass concentration of 5% and a mass concentration of 15% CaF 2Stir vigorously in a polytetrafluoroethylene flask, keep at 60°C, and continuously expose to hydrogen bubbles during the reaction. After 24 hours of reaction, a gray-black exfoliated MXene phase product is obtained. Soak the product in the acetic acid solution of HF, add methyl acrylate inducer, the mass concentrations of MXene and methyl acrylate are 100g / L and 2.5g / L respectively, the acetic acid solution is sealed in the autoclave, and the autoclave Put it in a muffle furnace, heat it to form a supercritical environment in the kettle for solvothermal reaction, keep it warm for 48 hours, anneal to room temperature, filter, wash, and get MXene nanowires with a regular shape. The nanowires are ground in a ball mill to shorten aspect rat...

no. 2 example

[0037] The second embodiment is a modified example of the first embodiment, the difference from the first embodiment is that the MAX material is replaced by Ti 3 SiC 2 , the concentration of dilute hydrochloric acid is 10%, the concentration of MXene in acetic acid is 150g / L, the concentration of methyl acrylate in acetic acid is 3.5g / L, other conditions and dosage are the same as those of the first embodiment, and will not be repeated here .

no. 3 example

[0039] The third embodiment is a modified example of the first embodiment, the difference from the first embodiment is that the MAX material is replaced by Ti 3 SiC 2 , the concentration of dilute hydrochloric acid is 7.5%, the concentration of MXene in acetic acid is 122g / L, the concentration of methyl acrylate in acetic acid is 2.7g / L, other conditions and dosage are the same as those of the first embodiment, and will not be repeated here .

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Abstract

The invention relates to the technical field of desalting treatment of wastewater, in particular to an MXene nanowire composite nanofiber membrane for photothermal desalting and a preparation method thereof. The preparation method comprises the following steps of (1) selecting MAX raw material, and treating in an HF (hydrogen fluoride) solution, so as to obtain MXene material; (2) preparing MXenenanowires by a supercritical solvent method, and repeatedly performing ball milling, so as to obtain MXene nanowires; (3) soaking the obtained MXene nanowires into a perfluoroalkyl solution of polytetrafluoroethylene, and shearing and dispersing at high speed, so as to obtain a spinning solution; (4) injecting the spinning solution into an electrospinning device, and performing electrostatic spinning by multiple spray heads, so as to obtain the MXene nanowire composite nanofiber membrane on a receiving device. The prepared MXene nanowire composite nanofiber membrane has the characteristics that the shape is complete, the length and radius ratio of the fiber is high, the infrared absorbing ability is good, the desalting efficiency is high, and the like; the MXene nanowire composite nanofiber membrane can be widely applied to the fields of freshening of industrial wastewater, high-salt water and salt water, purifying of heavy metal ion-polluted surface water, and the like.

Description

technical field [0001] The invention relates to an MXene nanowire composite electrospun fiber membrane used for photothermal desalination and a preparation method thereof. The fiber membrane material can be used in industrial waste water, desalination of high salt water and seawater, and repair of surface water polluted by heavy metals. It belongs to water Dealing with technical fields. Background technique [0002] Salt water refers to the total salt content, including such as Na + 、K + , C1 - , SO 4 2- Industrial and agricultural wastewater, sewage, brackish water and seawater with a mass fraction of plasma greater than 1%. There are many sources of salt water. For example, in the printing and dyeing industry, a large amount of sodium hydroxide, hypochlorous acid and other alkaline substances need to be added in the refining and bleaching process; in chemical production, a large amount of inorganic salt is used in the process In some areas, a large amount of high-sal...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D71/02B01D67/00C02F1/04C02F103/08C02F101/20
CPCY02A20/124
Inventor 代云容郭星星
Owner CHINA UNIV OF GEOSCIENCES (BEIJING)
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