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Photocatalytic antibacterial nanofiber membrane for air purification and preparation method thereof

A nanofiber membrane and air purification technology, applied in the field of air purification, can solve the problem of being easily infested by microorganisms such as bacteria, fungi, and molds suspended in the air, reducing the service life of nanofiber membranes, and low photocatalytic activity of bismuth oxyhalide. problems, to achieve the effect of improving photocatalytic activity, improving air purification ability, and improving antibacterial performance

Inactive Publication Date: 2019-04-12
成都市水泷头化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the air purification effect of a single filtration method is limited, especially for small molecule pollution sources such as volatile organic pollutants, which cannot be effectively removed. Direction of development
[0005] Among the photocatalytic materials, the bismuth oxyhalide series photocatalyst, as an important part of bismuth-based photocatalytic materials, is a new type of inorganic photocatalyst developed in recent years. It has an obvious layered structure and a suitable band gap, and has a strong The ability of photogenerated holes to directly oxidize substrates, but the photocatalytic activity of bismuth oxyhalide is low, which has become the main factor restricting its development and application
[0006] In addition, the air-purifying nanofiber membrane is easily infested by microorganisms such as bacteria, fungi, and molds suspended in the air during use. When the microorganisms attach to the air without pollutants and deposit on the nanofiber membrane, they will multiply rapidly, not only It will affect the air purification effect and reduce the service life of the nanofiber membrane, so the improvement of the antibacterial performance of the nanofiber membrane has become an important research topic

Method used

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  • Photocatalytic antibacterial nanofiber membrane for air purification and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Add bismuth nitrate pentahydrate into glycerol solvent, slowly add halide salt under stirring, then transfer to hydrothermal reaction kettle for reaction, after cooling, centrifugal precipitation, washing and drying, the ultra-thin Bismuth oxychloride nanosheets; the halide salt is potassium chloride; the temperature of the hydrothermal reaction is 158° C., and the time is 17 hours; the parts by weight of each raw material are 39 parts by weight of bismuth nitrate pentahydrate, 55 parts by weight of glycerol, and the halide salt 6 parts by weight;

[0034] (2) Add the ultra-thin bismuth oxychloride nanosheets and lanthanum chloride prepared in step (1) into deionized water, stir evenly, and then treat with ultrasonic waves at a frequency of 38kHz for 1.5h at room temperature, and then place them at 86°C React in a water bath for 17 hours, centrifuge the product and dry it, place it in a muffle furnace, raise the temperature to 470 ° C for 5 hours, cool and collect i...

Embodiment 2

[0038](1) Add bismuth nitrate pentahydrate into glycerol solvent, slowly add halide salt under stirring, then transfer to hydrothermal reaction kettle for reaction, after cooling, centrifugal precipitation, washing and drying, the ultra-thin Bismuth oxyiodide nanosheets; the halide salt is potassium iodide; the temperature of the hydrothermal reaction is 155° C., and the time is 17 hours; the parts by weight of each raw material are: 38 parts by weight of bismuth nitrate pentahydrate, 56 parts by weight of glycerol, and 6 parts by weight of halide salt share;

[0039] (2) Add the ultra-thin bismuth oxyiodide iodide nanosheets and lanthanum chloride prepared in step (1) into deionized water, stir evenly, and then treat with ultrasonic waves at a frequency of 35kHz for 2 hours at room temperature, and then place them in a water bath at 82°C After reacting in middle temperature for 17.5h, the product was centrifuged and dried, placed in a muffle furnace, heated to 460°C and calci...

Embodiment 3

[0043] (1) Add bismuth nitrate pentahydrate into glycerol solvent, slowly add halide salt under stirring, then transfer to hydrothermal reaction kettle for reaction, after cooling, centrifugal precipitation, washing and drying, the ultra-thin Bismuth oxybromide nanosheets; the halide salt is potassium bromide; the temperature of the hydrothermal reaction is 165° C., and the time is 16 hours; the parts by weight of each raw material are 42 parts by weight of bismuth nitrate pentahydrate, 51 parts by weight of glycerol, and the halide salt 7 parts by weight;

[0044] (2) Add the ultra-thin bismuth oxybromide nanosheets and lanthanum chloride prepared in step (1) into deionized water, stir evenly, and then treat with ultrasonic waves at a frequency of 45kHz for 1h at room temperature, and then place them in a water bath at 88°C The product was reacted for 16.5 hours, and the product was centrifuged and dried, placed in a muffle furnace, heated to 490°C and calcined for 4.5 hours,...

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Abstract

The invention belongs to the technical field of air purification and provides a photocatalytic antibacterial nanofiber membrane for air purification and a preparation method thereof. The method comprises the steps that an ultra-thin bismuth oxyhalide nanosheet is firstly prepared, then lanthanum is utilized for modification and then is mixed with a radix sophorae flavescentis extracting solution,polycaprolactam and adsorbent to prepare a spinning solution, and finally electrostatic spinning is executed to obtain the photocatalytic antibacterial nanofiber membrane. Compared with a conventionalmethod, the prepared nanofiber membrane significantly improves the photocatalytic activity of bismuth oxyhalide through lanthanum doped modification on the bismuth oxyhalide and has an efficient airpurification effect, the antibacterial property of the nanofiber membrane is effectively improved by adding the radix sophorae flavescentis extracting solution in the spinning solution, the service life of the membrane is prolonged, and the membrane can be widely used in the field of air purification.

Description

technical field [0001] The invention belongs to the technical field of air purification, and provides a photocatalytic antibacterial nanofiber film for air purification and a preparation method thereof. Background technique [0002] The increasing air pollution has brought serious threats to people's physical and mental health. In particular, formaldehyde, benzene, xylene, ammonia, etc. caused by interior decoration, as well as smoke, nitrogen oxides, and sour gases generated during industrial production, are the main factors that cause air pollution. Therefore, research and application of high-efficiency air purification materials have become extremely urgent needs. [0003] At present, the technical methods used for air purification mainly include filtration method, adsorption method, photocatalytic purification method, negative ion purification method, ozone disinfection, electrostatic dust removal, oxidation purification, etc. Among them, the filtration technology is fa...

Claims

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Application Information

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IPC IPC(8): B01J31/26B01J35/06B01D69/02B01D67/00B01D53/86B01D46/54A61L9/20A61L9/00B01D53/72B01D53/58B01D53/56A01N59/16A01P3/00A01P1/00
CPCA61L9/00A61L9/205B01D46/543B01D53/8628B01D53/8634B01D53/8668B01D67/0079B01D69/02A01N59/16B01J31/26B01D2253/108B01D2253/102B01D2253/116B01D2255/2063B01D2255/2096B01D2325/48B01D2257/406B01D2257/404B01D2257/7027B01D2257/708B01D2255/802B01J35/59B01J35/39
Inventor 蔡杰
Owner 成都市水泷头化工科技有限公司
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