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Method for rapidly preparing nano-silver particles

A technology of nano silver particles and silver nitrate, applied in the field of nano materials, can solve the problems of long reaction time, difficult to control particle size, long synthesis time, etc., and achieve the effects of good dispersibility, good stability and good performance

Inactive Publication Date: 2015-11-25
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the chemical reduction method has the advantages of simple operation, but the synthesis time is long and the particle size is difficult to control.
Sun Zongzhao and others reported the one-pot synthesis of gelatin nano-silver and its high-efficiency catalytic performance (Chemical Sensors, 2014, 34 (1): 17). The prepared nano-silver has good catalytic activity, but the reaction time is still long ( takes 8 hours)

Method used

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  • Method for rapidly preparing nano-silver particles
  • Method for rapidly preparing nano-silver particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Take 0.2g of collagen hydrolyzate in 10mL of distilled water, fully swell, heat up to 60°C, stop heating after the dissolution is complete, and prepare an aqueous solution of collagen hydrolyzate;

[0024] (2) Dissolve 0.176g of ascorbic acid in 10mL of distilled water to prepare ascorbic acid solution, and adjust the pH value of the solution to 7 with ammonia water;

[0025] (3) Under magnetic stirring conditions, 10 mL of ascorbic acid solution was added dropwise to 10 mL of collagen hydrolyzate solution dissolved with silver nitrate, and stirring reaction was continued for 15 minutes after the addition was completed, and the reaction temperature was room temperature;

[0026] (4) In the prepared solution containing silver nanoparticles, take 0.5mL in a vial, then add 0.5ml of distilled water, then take 2mg of porous carbon into it, mix, and disperse evenly by ultrasonic. Collagen hydrolyzate / nano-silver / porous carbon composite was prepared;

[0027] (5) Take 10 ...

Embodiment 2

[0029] (1) Take 0.2g of collagen hydrolyzate in 10mL of distilled water, fully swell, heat up to 60°C, stop heating after the dissolution is complete, and prepare an aqueous solution of collagen hydrolyzate;

[0030] (2) Dissolve 0.176g of ascorbic acid in 10mL of distilled water to prepare ascorbic acid solution, and adjust the pH value of the solution to 11 with ammonia water;

[0031] (3) under magnetic stirring condition, 10mL ascorbic acid solution is added dropwise in the collagen protein hydrolyzate solution that is dissolved with silver nitrate 10mL, continues to stir reaction 15 minutes after dropwise addition finishes, and reaction temperature is room temperature, prepares nano-silver particle, the result Such as figure 1 shown;

[0032] (4) In the prepared solution containing silver nanoparticles, take 0.5mL in a vial, then add 0.5mL of distilled water, then take 2mg of porous carbon into it, mix, and disperse uniformly by ultrasonic. Collagen hydrolyzate / nano-sil...

Embodiment 3

[0035] (1) Take 0.2g of collagen hydrolyzate in 10mL of distilled water, fully swell, heat up to 60°C, stop heating after the dissolution is complete, and prepare an aqueous solution of collagen hydrolyzate;

[0036] (2) Dissolve 0.176g of ascorbic acid in 10mL of distilled water to prepare ascorbic acid solution, and adjust the pH value of the solution to 7 with ammonia water;

[0037] (3) Under the condition of magnetic stirring, add 10 mL of ascorbic acid solution dropwise into 10 mL of collagen hydrolyzate solution dissolved in silver nitrate, and continue stirring and reacting for 15 minutes after the dropping, and the reaction temperature is 40° C.;

[0038] (4) In the prepared solution containing silver nanoparticles, take 0.5mL in a vial, then add 0.5mL of distilled water, then take 2mg of porous carbon into it, mix, and disperse uniformly by ultrasonic. Collagen hydrolyzate / nano-silver / porous carbon composite was prepared;

[0039] (5) Take 10 μL of the prepared coll...

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Abstract

The invention discloses a method for rapidly preparing nano-silver particles. A collagen hydrolysate is adopted as an assistant; ascorbic acid is adopted as a reductant; silver nitrate is adopted as a raw material; and at a condition of room temperature, the nano-silver particles are synthesized rapidly. The nano-silver particles prepared with the method disclosed by the invention are uniform in grain size; the grain size is below 100 nm; and the nano-silver particles are good in dispersibility. The prepared nano-silver particles are applied to manufacture of a hydrogen peroxide non-enzyme sensor. As is shown by research, the hydrogen peroxide non-enzyme sensor can rapidly and accurately detect hydrogen peroxide; and the stability is high. The method disclosed by the invention is simple; the material is easily available; and the method is environment-friendly and convenient to promote.

Description

technical field [0001] The invention relates to the technical field of nanometer materials, in particular to a method for rapidly preparing nanometer silver particles and its application in biosensors. Background technique [0002] Due to its good electrical conductivity, silver nanoparticles play an extremely important role in the field of microelectronics. Nanoparticles can show some special properties, such as: surface effect, volume effect, macroscopic quantum tunneling effect and dielectric confinement effect, etc. Nanoparticles have some unique properties, and have broad application prospects in materials science (such as magnetic materials, optical materials, electronic materials, and sintering of high-strength and high-density materials), catalysis, and sensing. [0003] Hydrogen peroxide is not only an intermediate in many industrial processes, but also a by-product of many enzyme oxidation reactions in organisms, which is related to many physiological processes. ...

Claims

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Application Information

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IPC IPC(8): B22F9/24G01N27/30B82Y40/00
Inventor 黄雅钦关越鹏史光明
Owner BEIJING UNIV OF CHEM TECH
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