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A kind of silver composite iron oxide fiber and its preparation method and application

A composite iron oxide and fiber technology, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, chemical/physical processes, etc., can solve the problem of reduced catalytic activity and the inability of simulated enzymes to have both high activity and High stability, high production cost and other problems, to overcome the effects of easy reunion, unfavorable recycling and reuse, and high stability

Active Publication Date: 2020-02-21
QILU UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are obvious defects in the application of natural enzymes: (1) high production cost
AgNPs also have peroxidase-like activity, but they are prone to agglomeration during use, resulting in a decrease in their catalytic activity
[0005] In summary, the mimetic enzymes prepared by the prior art cannot have high activity and high stability at the same time, so it is of great significance to prepare mimetic enzymes with high activity and high stability

Method used

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  • A kind of silver composite iron oxide fiber and its preparation method and application
  • A kind of silver composite iron oxide fiber and its preparation method and application
  • A kind of silver composite iron oxide fiber and its preparation method and application

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Embodiment

[0051] 1.5g polyvinylpyrrolidone (PVP) was dissolved in 15mL ethanol under magnetic stirring, and after the PVP was completely dissolved, a polymer solution was obtained, and 0.45g Fe(NO 3 ) 3 9H 2 O, 0.015g AgNO 3 , 0.46g citric acid was placed in water to prepare 4.5mL salt solution, the salt solution was added to the polymer solution, and stirred on a constant temperature magnetic stirrer until there were no small bubbles in the solution, and a uniform, yellow-brown solution with a viscosity of 30Pa was obtained. · s precursor sol solution. Inject the precursor sol solution into the needle tube, set the voltage of the electrospinning machine to 20KV, the receiving distance to 20cm, and the advancing speed to 0.002mm / s; collect the prepared gel fiber after spinning and place it at 80°C Dry in the oven for at least 12 hours. The fiber is calcined to remove impurities and organic matter, and the final product obtained is Ag-Fe 2 o 3 The composite fiber, wherein the calci...

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Abstract

The invention discloses a silver composite iron oxide fiber and its preparation method and application. The preparation method is as follows: polyvinylpyrrolidone is dissolved in an organic solvent to make a polymer solution, iron nitrate, silver nitrate and citric acid are dissolved in water to make a salt solution, and the polymer solution and the salt solution are mixed and stirred evenly. Preparing a precursor sol solution with a set viscosity, using electrospinning technology to make the precursor sol solution into gel fibers, drying the gel fibers and then calcining them, to obtain silver composite iron oxide fibers after calcining; wherein , the mass ratio of silver element, iron element and citric acid is 1:5~8:45~50. The calcination process is to first heat to 300±10°C and keep it for a period of time, and then heat to 450±10°C and keep it for a period of time. The silver composite iron oxide fiber prepared by this preparation method has peroxidase-like activity, and its enzyme activity is high and its stability is good.

Description

technical field [0001] The invention relates to a silver composite iron oxide fiber, a preparation method and application thereof. Background technique [0002] Enzymes are proteins with specificity and high catalytic activity produced in organisms. Various life activities such as growth, development, and reproduction of organisms are inseparable from the catalysis of enzymes. In order to distinguish them from the analogs mentioned later in this application Enzymes, which are referred to herein as native enzymes. Peroxidase is a kind of oxidoreductase extracted from plants, animals, and microorganisms. It takes heme as a prosthetic group and participates in the physiological metabolism in organisms. It can catalyze H 2 o 2 Hydrogen oxide donor substrate. In the process of life activities, peroxidase mainly catalyzes the oxidation of oxides or peroxides in organisms to decompose other toxins. The widely used peroxidase is horseradish peroxidase (HRP) extracted from natura...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F9/08B01J23/89B01J35/06
CPCD01F9/08B01J23/8906B01J35/58
Inventor 孙海燕吕洪水周湘竹陶芙蓉张志良
Owner QILU UNIV OF TECH
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