Preparation method and application of high-purity silver-doped bismuth tungstate nano-antibacterial fibrous membrane

A nano-antibacterial fiber and nano-fiber technology are applied in the field of preparation of high-purity silver-doped bismuth tungstate nano-antibacterial fiber film, which can solve the problems of difficulty in recycling and reuse, easy agglomeration of nanoparticles, and improve the probability of electronic transition. , high antibacterial efficiency, the effect of improving antibacterial performance

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

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Problems solved by technology

Not only that, the high-purity silver-doped bismuth tungstate nano-antibacterial fiber membrane solves the problem that nanoparticles are easy to agglomerate, difficult to recycle and reuse, so high-purity silver-doped bismuth tungstate nano-antibacterial fiber membrane is a kind of antibacterial fiber membrane with good application prospects new nano antibacterial material

Method used

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  • Preparation method and application of high-purity silver-doped bismuth tungstate nano-antibacterial fibrous membrane
  • Preparation method and application of high-purity silver-doped bismuth tungstate nano-antibacterial fibrous membrane

Examples

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Embodiment 1

[0022] Dissolve 2.52g citric acid in 7mL deionized water, add nitric acid to adjust the pH value to 2, 3, 4, then add 0.002mol Bi(NO 3 ) 3 ·5H 2 O, stirred and dissolved with a magnetic stirrer at room temperature. At the same time, 0.001mol of Na 2 WO 4 2H 2 O was dissolved in 10 mL of deionized water. Then, the sodium tungstate solution was slowly added dropwise to the bismuth nitrate solution, magnetically stirred, and 0.1mol / L AgNO was added dropwise under stirring. 3 The solution is such that the mass fraction of silver ions in bismuth tungstate is 2%, which is recorded as solution 1. Take 1.3g K-90 polyvinylpyrrolidone and dissolve it in 10mL ethanol, and keep stirring to dissolve. Take 3mL of solution 1 and add it to the polyvinylpyrrolidone-ethanol solution, and keep stirring for 12h to fully mix. A uniform and stable spinning precursor solution was obtained. Fill it into a 10mL syringe. The syringe is on the positive pole, and its injection port is a 0.7mm n...

Embodiment 2

[0024] Dissolve 2.52g citric acid in 7mL distilled water, add 3mL nitric acid, then add 0.002mol Bi(NO 3 ) 3 ·5H 2 O, stirred and dissolved with a magnetic stirrer at room temperature. At the same time, 0.001mol of Na 2 WO 4 2H 2 O was dissolved in 10 mL of deionized water. Then, the sodium tungstate solution was slowly added dropwise to the bismuth nitrate solution, magnetically stirred, and 0.1mol / L AgNO was added dropwise under stirring. 3 The solution makes the mass fraction of silver ions in bismuth tungstate 1%, 2%, and 3%, which is recorded as solution 1. Dissolve 1.3g of K-90 polyvinylpyrrolidone in 10mL of ethanol and keep stirring until dissolved. Take 3mL of solution 1 and add it into the polyvinylpyrrolidone-ethanol solution, and keep stirring for 12h to mix thoroughly. A uniform and stable electrospun sol was obtained. Put the electrospun sol into a syringe with a volume of 10mL. The syringe is at the positive pole, and its injection port is a 0.7mm needl...

Embodiment 3

[0026] Dissolve 2.52g of citric acid in 7mL of deionized water, add 3mL of nitric acid, and then add 0.002mol Bi(NO 3 ) 3 ·5H 2 O, stirred and dissolved with a magnetic stirrer at room temperature. At the same time, 0.001mol of Na 2 WO 4 2H 2O was dissolved in 10 mL of deionized water. Then, the sodium tungstate solution was slowly added dropwise to the bismuth nitrate solution, magnetically stirred, and 0.1mol / L AgNO was added dropwise under stirring. 3 The solution is such that the mass fraction of silver ions in bismuth tungstate is 2%, which is recorded as solution 1. Take 1.2g, 1.3g, 1.4g of K-90 polyvinylpyrrolidone and dissolve in 10mL of ethanol, and keep stirring to dissolve. Take 3mL of solution 1 and add it to the polyvinylpyrrolidone-ethanol solution, and keep stirring for 12h to fully mix. A uniform and stable spinning precursor solution was obtained. Fill it into a 10mL syringe. The syringe is on the positive pole, and its injection port is a 0.7mm need...

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Abstract

The invention discloses a preparation method and application of a high-purity silver-doped bismuth tungstate nano-antibacterial fibrous membrane. The preparation method comprises the steps of dissolving citric acid in water, adding and dissolving acid and bismuth salt particles, marking the solution as a solution 1, dissolving tungsten salt in deionized water, and marking the solution as a solution 2; dropwise adding the solution 2 into the solution 1, adding a silver salt aqueous solution into the solution 1, stirring until the solution is completely dissolved, and marking the solution as a solution 3; adding polyvinylpyrrolidone into ethanol, stirring until polyvinylpyrrolidone is completely dissolved, and marking the solution as a solution 4; dissolving the solution 3 in the solution 4 to obtain a spinning precursor solution, and putting the spinning precursor solution into an injector of an electrostatic spinning machine for electrostatic spinning to obtain a nanofiber gel membrane; carrying out heat treatment on the nanofiber gel membrane, after polyvinylpyrrolidone is removed, taking out nanofibers, removing water-soluble inorganic salt in the nanofibers, and obtaining the high-purity silver-doped bismuth tungstate nano- antibacterial fibrous membrane. The fibrous membrane is high in antibacterial efficiency.

Description

technical field [0001] The invention relates to an antibacterial material, in particular to a preparation method and application of a high-purity silver-doped bismuth tungstate nano antibacterial fiber membrane. Background technique [0002] In the 21st century, the water quality problems associated with economic development have become increasingly prominent. Wastewater often contains various bacteria and viruses. Among the solutions for dealing with these harmful substances, semiconductor antibacterial agents have attracted widespread attention due to their green environmental protection characteristics that use solar energy to achieve sterilization effects. focus on. The energy band structure of a semiconductor is composed of a valence band and a conduction band, and the discontinuous region between them is a forbidden band. The principle of the semiconductor antibacterial agent is that under the excitation of light with energy greater than the forbidden band width, the ...

Claims

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Application Information

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IPC IPC(8): C02F1/50
CPCC02F1/50C02F2303/20
Inventor 储成林周镜茹薛烽白晶
Owner SOUTHEAST UNIV
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