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Ag/AgBr/AgVO3 composite nanofiber filter membrane and preparation method and application thereof

A composite nanofiber, composite light technology, applied in catalyst activation/preparation, chemical instruments and methods, chemical/physical processes, etc., can solve problems such as poor mechanical properties, inability to achieve recyclability, etc. Conducive to recycling and efficient treatment

Active Publication Date: 2021-03-09
NANJING FORESTRY UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The PAN membrane prepared based on electrospinning technology has a good separation effect in water and is often used for water treatment, but due to its poor mechanical properties, it cannot be recycled.
[0007] At present, there is no composite catalytic fiber membrane with good mechanical properties and catalytic properties on the market.

Method used

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  • Ag/AgBr/AgVO3 composite nanofiber filter membrane and preparation method and application thereof
  • Ag/AgBr/AgVO3 composite nanofiber filter membrane and preparation method and application thereof
  • Ag/AgBr/AgVO3 composite nanofiber filter membrane and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Embodiment 1 prepares PAN / CA-Ag / AgBr / AgVO 3 membrane

[0065] Step 1, AgVO 3 The preparation method of catalyst adopts hydrothermal method, and concrete steps comprise:

[0066] 1) Weigh 1 mmol of silver nitrate (AgNO 3 ) was added into 40mL of deionized water, stirred to make it dissolve completely, and it was marked as solution A. Another 1 mmol of ammonium metavanadate was weighed, added to 40 mL of deionized water, stirred, and marked as solution B. Slowly drop solution A into solution B, adjust the pH value to 7.0 with 1 mol / L ammonia water and nitric acid, and stir for 3 hours in the dark to obtain a mixed solution.

[0067] 2) Transfer the above mixed solution into a 100mL autoclave, put it into an oven, and conduct a hydrothermal synthesis reaction at 160°C for 8h. After natural cooling, wash with deionized water and absolute ethanol for 3 to 5 times, dry to remove excess water or ethanol, and prepare AgVO 3 .

[0068] Step 2, Ag / AgBr / AgVO 3 The preparat...

Embodiment 2

[0081] Embodiment 2 prepares PAN / CA-Ag / AgBr / AgVO 3 film 2

[0082] Step 1, AgVO 3 The preparation method of catalyst adopts hydrothermal method, and concrete steps comprise:

[0083] 1) Weigh 1 mmol of silver nitrate (AgNO 3 ) was added into 40mL of deionized water, stirred to make it dissolve completely, and it was marked as solution A. Another 1 mmol of ammonium metavanadate was weighed, added to 40 mL of deionized water, stirred, and marked as solution B. Slowly drop solution A into solution B, adjust the pH value to 7.0 with 1 mol / L ammonia water and nitric acid, and stir for 3 hours in the dark to obtain a mixed solution.

[0084] 2) Transfer the above mixed solution into a 100mL autoclave, put it into an oven, and conduct a hydrothermal synthesis reaction at 160°C for 8h. After natural cooling, wash with deionized water and absolute ethanol for 3 to 5 times, dry to remove excess water or ethanol, and prepare AgVO 3 .

[0085] Step 2, Ag / AgBr / AgVO 3 The preparatio...

experiment example

[0133] 1) Get the PAN / CA-Ag / AgBr / AgVO prepared in Example 1 3 Nanofiber membrane, the PAN / CA nanofiber membrane prepared in Comparative Example 2, the PAN / CA-AgVO prepared in Comparative Example 3 3 Nanofiber membrane samples (both circular membranes with a diameter of 7cm) were placed in the photocatalytic reactor, and a rhodamine B dye blank control without fiber membrane samples was set up, and 450mL of rhodamine with a concentration of 10mg / L was added to the water tank. In the Ming B solution, turn on the peristaltic pump at a speed of 10r / s, place the photoreactor under a 250w xenon lamp, and start the photocatalytic reaction. During the reaction process, the reaction temperature should be maintained at room temperature. Samples were taken every 30 minutes for the first 2 hours, and every 1 hour for the next 3 hours, for a total of 5 hours. Record the corresponding value of the absorbance A of the sample at the UV maximum absorption wavelength of 554.

[0134] The degr...

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Abstract

The invention belongs to the field of polymer composite materials, and discloses a polyacrylonitrile / cellulose acetate-silver / silver bromide / silver metavanadate composite fiber membrane and a preparation method and application thereof. The fibrous membrane is prepared by the following method: a, preparing silver metavanadate, b, preparing a silver / silver bromide / silver metavanadate composite photocatalyst, and c, preparing a polyacrylonitrile / cellulose acetate-silver / silver bromide / silver metavanadate electrostatic spinning solution, and preparing the nanofiber membrane through an electrostatic spinning technology. The fiber membrane is used as a carrier of the photocatalyst to realize recycling of the photocatalyst, and is expected to be better applied in the future.

Description

technical field [0001] The invention belongs to the field of polymer composite materials. Specifically related to a kind of Ag / AgBr / AgVO based on electrospinning process 3 Composite nanofiber membrane and its preparation method and application Background technique [0002] With the development of my country's industry, a large amount of industrial wastewater is produced, and these untreated sewage is discharged into rivers or even into groundwater, resulting in a significant reduction in the purification functions of rivers and groundwater bodies, causing serious harm to the environment. However, the effect of traditional organic matter treatment methods (adsorption, filtration, biochemical treatment, etc.) is not very satisfactory, so a green and efficient treatment method is urgently needed. [0003] Photocatalytic technology is a high-efficiency, green, energy-saving, and non-secondary pollution-free technology, and has broad application prospects in many fields. This ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/12B01D67/00B01D71/42B01J27/08B01J35/06B01J37/34C02F1/30C02F1/44C02F101/30
CPCB01D69/12B01D67/0002B01D71/42B01J27/08B01J37/342C02F1/30C02F1/44C02F2101/30B01J35/39B01J35/59Y02W10/37
Inventor 岳一莹侯凯阳顾佳敏韩景泉蒋剑春
Owner NANJING FORESTRY UNIV
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