A preparation method and application of visible light-induced self-cleaning carbon fiber membrane

A carbon fiber membrane, self-cleaning technology, applied in chemical instruments and methods, membrane, membrane technology, etc., can solve problems such as unfavorable large-scale applications

Active Publication Date: 2021-09-10
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since ultraviolet light accounts for only 5% of sunlight, it is not conducive to its large-scale application; therefore, it is of great scientific significance to further develop visible light-responsive antifouling film materials

Method used

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  • A preparation method and application of visible light-induced self-cleaning carbon fiber membrane
  • A preparation method and application of visible light-induced self-cleaning carbon fiber membrane
  • A preparation method and application of visible light-induced self-cleaning carbon fiber membrane

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Experimental program
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Effect test

Embodiment 1

[0031] Step 1. Preparation of carbon fiber membrane (CF): cut the cotton cloth into about 10cm 2 , placed in a tube furnace under a nitrogen atmosphere, the temperature was raised to 400°C at a rate of 5°C / min, and maintained for 2h. The carbonized sample was washed with ethanol and dried in an oven at 40°C for 8h to obtain a carbon fiber membrane. ;

[0032] Step 2, preparation of nickel-cobalt LDH modified carbon fiber membrane (CF / Ni-Co LDH): dissolving nickel chloride hexahydrate, cobalt chloride hexahydrate and urea in deionized water to obtain a mixed solution, wherein nickel chloride hexahydrate , The ratio of cobalt chloride hexahydrate, urea and deionized water is 2.5mmol: 5mmol: 9mmol: 50mL; pour the mixed solution into a hydrothermal kettle, then vertically put CF into the mixed solution, and conduct constant temperature water at 90°C. Thermal reaction for 9 hours; after natural cooling, take out the CF / Ni-Co LDH, wash with ethanol, and then dry at 40°C for 8 hours...

Embodiment 2

[0041] Step 1. Preparation of carbon fiber membrane (CF): cut the cotton cloth into about 10cm 2 , placed in a tube furnace under a nitrogen atmosphere, the temperature was raised to 500°C at a rate of 3°C / min, and maintained for 3h. The carbonized sample was washed with ethanol and dried in an oven at 50°C for 7h to obtain a carbon fiber membrane. ;

[0042] Step 2, preparation of nickel-cobalt LDH modified carbon fiber membrane (CF / Ni-Co LDH): dissolving nickel chloride hexahydrate, cobalt chloride hexahydrate and urea in deionized water to obtain a mixed solution, wherein nickel chloride hexahydrate , The ratio of cobalt chloride hexahydrate, urea and deionized water is 2mmol: 3mmol: 9mmol: 50mL; pour the mixed solution into a hydrothermal kettle, then put CF into the mixed solution vertically, and conduct constant temperature hydrothermal treatment at 100°C React for 10 hours; after natural cooling, take out the CF / Ni-Co LDH, wash with ethanol, and then dry at 50°C for 7 ...

Embodiment 3

[0045] Step 1. Preparation of carbon fiber membrane (CF): cut the cotton cloth into about 10cm 2 , placed in a tube furnace under a nitrogen atmosphere, the temperature was raised to 600°C at a rate of 4°C / min, and maintained for 4 hours. The carbonized sample was washed with ethanol and dried in an oven at 60°C for 6 hours to obtain a carbon fiber membrane. ;

[0046] Step 2, preparation of nickel-cobalt LDH modified carbon fiber membrane (CF / Ni-Co LDH): dissolving nickel chloride hexahydrate, cobalt chloride hexahydrate and urea in deionized water to obtain a mixed solution, wherein nickel chloride hexahydrate , The ratio of cobalt chloride hexahydrate, urea and deionized water is 0.5mmol: 1mmol: 9mmol: 50mL; pour the mixed solution into a hydrothermal kettle, then vertically put CF into the mixed solution, and conduct constant temperature water at 110°C Thermal reaction for 8 hours; after natural cooling, take out the CF / Ni-Co LDH, wash with ethanol, and then dry at 60°C f...

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Abstract

The invention belongs to the technical field of preparation of environmental functional materials, and specifically relates to a preparation method and application of a visible light-induced self-cleaning carbon fiber membrane; Dissolve urea in deionized water, transfer it to a hydrothermal kettle, and then immerse it in a carbon fiber membrane for a constant temperature hydrothermal reaction; after the reaction, the temperature is naturally lowered, and finally, the product is taken out and washed with ethanol and dried to obtain nickel-cobalt layered double hydroxide The modified carbon fiber membrane is immersed in an aqueous solution of silver nitrate and irradiated under ultraviolet light to obtain a self-cleaning carbon fiber membrane; the light-induced self-cleaning carbon fiber membrane prepared by the present invention combines light-induced self-cleaning technology and membrane separation technology, Enhance the anti-fouling performance of the membrane and prolong the service life of the membrane; the prepared membrane exhibits superhydrophilic / underwater superoleophobicity, can efficiently separate different oil-water mixtures, and has good regeneration.

Description

technical field [0001] The invention belongs to the technical field of preparation of environmental functional materials, and in particular relates to a preparation method and application of a visible light-induced self-cleaning carbon fiber membrane. Background technique [0002] Environmental problems have become a major challenge faced by human beings, seriously threatening the ecological environment and human health. A large amount of oily wastewater produced by industrial oily wastewater, domestic sewage and frequent oil spill accidents has become a worldwide problem. Many methods including gravity method, centrifugation method, air flotation method, adsorption method, chemical method, biological method and membrane separation method are commonly used in the treatment of oily wastewater. Among them, membrane separation shows great advantages due to its advantages of low energy consumption, high separation efficiency, simple operation, and no secondary pollution. Howev...

Claims

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Application Information

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IPC IPC(8): B01D71/02B01D67/00B01D69/02C02F1/44
CPCB01D67/0044B01D69/02B01D71/021B01D2325/36C02F1/44
Inventor 谢阿田崔久云杨瑾陈阳阳戴江栋李春香闫永胜
Owner JIANGSU UNIV
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