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A gold-loaded porous submicron fiber and its preparation method

A sub-micron, fiber technology, applied in the field of gold-loaded porous sub-micron fibers and its preparation, can solve the problems of changing inherent properties, reducing the surface area of ​​active sites, etc., achieving mild reaction conditions, increasing catalytic oxidation performance, and good formaldehyde removal ability. Effect

Active Publication Date: 2021-11-19
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, their practical applications are often limited by structural instabilities such as aggregation, which reduce the surface area of ​​active sites and alter their intrinsic properties.

Method used

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  • A gold-loaded porous submicron fiber and its preparation method
  • A gold-loaded porous submicron fiber and its preparation method
  • A gold-loaded porous submicron fiber and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] (1) Preparation of PMAA microspheres: Add 2ml of methacrylic acid (MAA) and 0.04g of azobisisobutyronitrile (AIBN) into a 100ml round bottom flask, pour 80ml of acetonitrile into it, and shake until completely mixed. Polymerization reaction occurred in the system by distillation precipitation polymerization method, control the boiling within 15min, continue heating until 40ml of solvent was distilled off, and then end the reaction, then cooled naturally to room temperature. The obtained product was repeatedly washed by centrifugation with acetonitrile for 4 times, and the product was stored in 30ml of acetonitrile to obtain monodisperse uncrosslinked polymer microspheres PMAA. The SEM image is shown in figure 1 .

[0043] (2) Preparation of Au / PMAA composite microspheres: Take a 100ml round bottom flask, add 70ml of acetonitrile, add 3.2ml of PMAA and stir to mix, add 1ml of chloroauric acid solution, mix and stir at room temperature for 12h, take 0.0111g of Sodium bor...

Embodiment 2

[0045] (1) Preparation of PMAA microspheres: Add 2ml of methacrylic acid (MAA) and 0.04g of azobisisobutyronitrile (AIBN) into a 100ml round bottom flask, pour 80ml of acetonitrile into it, and shake until completely mixed. Polymerization reaction occurred in the system by distillation precipitation polymerization method, control the boiling within 15min, continue heating until 40ml of solvent was distilled off, and then end the reaction, then cooled naturally to room temperature. The resulting product was washed by centrifugation repeatedly with acetonitrile for 4 times, and the product was stored in 30 ml of acetonitrile to obtain monodisperse uncrosslinked polymer microspheres PMAA.

[0046] (2) Preparation of Au / PMAA composite microspheres: Take a 100ml round bottom flask, add 60ml of acetonitrile, add 3.2ml of PMAA and stir to mix, add 1ml of chloroauric acid solution, mix and stir at room temperature for 12h, take 0.0111g of Sodium borohydride was added to 0.3ml of ultra...

Embodiment 3

[0049] (1) Preparation of PMAA microspheres: Add 2ml of methacrylic acid (MAA) and 0.04g of azobisisobutyronitrile (AIBN) into a 100ml round bottom flask, pour 80ml of acetonitrile into it, and shake until completely mixed. Polymerization reaction occurred in the system by distillation precipitation polymerization method, control the boiling within 15min, continue heating until 40ml of solvent was distilled off, and then end the reaction, then cooled naturally to room temperature. The resulting product was washed by centrifugation repeatedly with acetonitrile for 4 times, and the product was stored in 30 ml of acetonitrile to obtain monodisperse uncrosslinked polymer microspheres PMAA.

[0050] (2) Preparation of Au / PMAA composite microspheres: take a 100ml round bottom flask, add 80ml of acetonitrile, add 3.2ml of PMAA and stir to mix, add 1ml of chloroauric acid solution, mix and stir at room temperature for 12h, take 0.0111g of Sodium borohydride was added to 0.3ml of ultra...

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Abstract

The invention discloses a gold-loaded porous submicron fiber and a preparation method thereof, belonging to the technical field of noble metal composite materials. The gold-loaded porous submicron fiber is a submicron fiber blended with Au / PMAA and PVB. The preparation method is as follows: Monomer methacrylic acid and initiator were prepared by distillation precipitation polymerization method to prepare water-soluble polymethylacrylate with carboxyl groups on the surface, and gold was loaded on uncrosslinked monodisperse PMAA microspheres by in situ reduction method, and the Au / PMAA composite microspheres It is mixed with high molecular polymer polyvinyl butyral resin to form a solution, the composite material is prepared by electrospinning, and the non-woven material is washed in aqueous sodium hydroxide solution to obtain gold-loaded porous submicron fibers. The composite nano-gold catalyst material synthesized by the invention has good formaldehyde removal ability, and can realize repeated utilization and recovery.

Description

technical field [0001] The invention relates to the technical field of precious metal composite materials, in particular to a gold-loaded porous submicron fiber and a preparation method thereof. Background technique [0002] Formaldehyde is a ubiquitous air pollutant. Among many volatile organic compounds, formaldehyde is the main indoor air pollutant and a type of carcinogen stipulated by the International Organization for Cancer Research (IARC). The World Health Organization (WHO) recommends that indoor HCHO Concentration should not exceed 0.1mg / m 3 . Indoor formaldehyde emission sources include decoration and decoration materials, furniture, and indoor activities such as cooking. Long-term contact with formaldehyde can cause throat inflammation, headache, dyspnea, skin irritation, allergic dermatitis, cough, asthma and other diseases. About 80% of human life is spent indoors. To protect and promote human health, formaldehyde removal is crucial. [0003] At present, in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D04H1/728D01D5/00D01F6/50D01F1/10
CPCD01D5/003D01F1/10D01F6/50D04H1/728
Inventor 刘巍陈雪微高洪达
Owner TIANJIN POLYTECHNIC UNIV
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