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Synthesis of nano-silver colloid by polyol solvothermal method

A technology of nano-silver colloid and solvothermal method, which is applied in the direction of nanotechnology, nanotechnology, nano-medicine, etc., can solve the problems of not being able to achieve uniform particle size, shape and size uniformity of nano-silver materials, and achieve low cost, The effect of less impurities and high efficiency

Pending Publication Date: 2022-01-21
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the shape and size uniformity of nano-silver materials prepared by chemical reduction are not high, and most of them cannot achieve uniform particle size.

Method used

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  • Synthesis of nano-silver colloid by polyol solvothermal method
  • Synthesis of nano-silver colloid by polyol solvothermal method
  • Synthesis of nano-silver colloid by polyol solvothermal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Take the 20ml system as an example:

[0030] (1) take silver nitrate 0.1413g and polyvinylpyrrolidone 0.9324g;

[0031] (2) Dissolve the weighed silver nitrate and polyvinylpyrrolidone in 10 ml of ethylene glycol solvent respectively, and then mix them ultrasonically for 10 min.

[0032] (3) The mixed solution was transferred to a reaction kettle, placed in an oven preset at 160° C., taken out after reacting for 4 hours, and cooled to room temperature to obtain a mother liquid of nano-silver colloid.

[0033] (4) Centrifuge the nano-silver colloid mother liquor in batches at 6000 rpm, remove the supernatant, and obtain a precipitate. After repeating the centrifugation process 4-5 times, the precipitate was dispersed in ultrapure water or absolute ethanol. figure 1 For the TEM photograph of the silver nano that obtains according to embodiment 1, from figure 1 It can be seen that the morphology of the prepared silver nanometer is complete, the average particle size is ...

Embodiment 2

[0035] Take the 20ml system as an example:

[0036] (1) Take silver nitrate 0.0588g and polyvinylpyrrolidone 0.4662g;

[0037] (2) Dissolve the weighed silver nitrate and polyvinylpyrrolidone in 10 ml of ethylene glycol solvent respectively, and then mix them ultrasonically for 10 min.

[0038] (3) The mixed solution was transferred to a reaction kettle, placed in an oven preset at 140° C., taken out after reacting for 6 hours, and cooled to room temperature to obtain a mother liquid of nano-silver colloid.

[0039] (4) Centrifuge the nano-silver colloid mother liquor in batches at 6000 rpm, remove the supernatant, and obtain a precipitate. After repeating the centrifugation process 4-5 times, the precipitate was dispersed in ultrapure water or absolute ethanol. figure 2 For the TEM photograph of the silver nano that obtains according to embodiment 2, from figure 2 It can be seen that the morphology of the prepared silver nanoparticles is complete, the average particle si...

Embodiment 3

[0041] Take the 20ml system as an example:

[0042] (1) Take silver nitrate 0.0850g and polyvinylpyrrolidone 0.9231g;

[0043] (2) Dissolve the weighed silver nitrate and polyvinylpyrrolidone in 10 ml of ethylene glycol solvent respectively, and then mix them ultrasonically for 10 min.

[0044] (3) The mixed solution was transferred to a reaction kettle, placed in an oven preset at 180° C., taken out after reacting for 8 hours, and cooled to room temperature to obtain a mother liquid of nano-silver colloid.

[0045] (4) Centrifuge the nano-silver colloid mother liquor in batches at 6000 rpm, remove the supernatant, and obtain a precipitate. After repeating the centrifugation process 4-5 times, the precipitate was dispersed in ultrapure water or absolute ethanol. image 3 For the TEM photograph of the silver nano that obtains according to embodiment 3, from image 3 It can be seen that the prepared silver nanoparticles have complete morphology and an average particle size of...

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Abstract

The invention provides a novel method for synthesizing nano-silver colloid by a polyol solvothermal method, and the nano-silver colloid is prepared by taking ethylene glycol as a solvent and combining a solvothermal method. The preparation method of the nano-silver colloid is simple, few in steps, high in efficiency and low in cost, and a high-quality silver nano-material can be prepared within fixed time; the prepared silver nano-material is uniform in particle size and few in impurities; and preparation equipment is simple and easy to amplify for large-scale production.

Description

technical field [0001] The invention relates to the field of nano-silver material preparation, in particular to a method for synthesizing a novel polyol solvothermal nano-silver glue. Background technique [0002] The four major effects of nanomaterials, namely small size effect, quantum effect, surface effect and macroscopic quantum tunneling effect, make it have physical and chemical properties that traditional materials do not have, and exhibit unique optical, electrical, magnetic, catalytic, Chemical characteristics and superconducting properties have important application value in chemical industry, light industry, medicine and other fields. [0003] Metal nanomaterials are an important part of nanomaterial research, represented by nano-gold, silver, copper, etc. Among them, nano-silver has stable physical and chemical properties, so it has great significance for the controllable preparation and application of nano-silver. meaning. [0004] Silver nanoparticles are co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/107B22F1/0545B82Y5/00B82Y30/00B82Y40/00G01N21/65
CPCB22F9/24G01N21/658B82Y40/00B82Y5/00B82Y30/00
Inventor 佘远斌朱娟刘剑付海燕胡瑛周春松吴美霞范尧
Owner ZHEJIANG UNIV OF TECH
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