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Synthesis method for spherical nano-silver particles and spherical nano-silver particles

A technology of spherical nano-silver and synthesis method, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, and can solve the problems of non-compliance with environmental protection requirements and pollution of synthetic nano-silver

Inactive Publication Date: 2016-12-21
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of this, the object of the present invention is to provide a synthetic method of spherical nano-silver particles and spherical nano-silver particles, to solve the problems that existing methods for synthesizing nano-silver have pollution and do not meet environmental protection requirements

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  • Synthesis method for spherical nano-silver particles and spherical nano-silver particles
  • Synthesis method for spherical nano-silver particles and spherical nano-silver particles

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Embodiment 1

[0037] Embodiment 1 of the present invention provides a kind of synthetic method of spherical nano-silver particles, such as figure 1 As shown, the method includes:

[0038] Step S101, preparing a lemongrass extract, uniformly mixing the lemongrass extract with water to obtain a lemongrass extract, and adjusting the pH value of the lemongrass extract to alkaline;

[0039] Step S102, preparing a soluble silver salt solution and a starch solution, uniformly mixing the soluble silver salt solution and the starch solution to obtain a silver salt mixed solution;

[0040] Step S103, uniformly mixing the alkaline lemongrass extract and the silver salt mixed solution and reacting at a set temperature for a set period of time to obtain a solution containing spherical nano-silver particles.

[0041] In the embodiments of the present invention, when synthesizing nano-silver particles, lemon grass, starch, and soluble silver salt solution are used as reactants. These reactants are enviro...

Embodiment 2

[0062] A synthetic method for spherical nano-silver particles, comprising the following steps:

[0063] (1) Pulverize the dried lemongrass, weigh 3g of lemongrass powder, add 100g of water, go through an oil bath at 100°C until boiling and keep boiling for 10 minutes, vacuum filter, and concentrate the resulting solution under reduced pressure to obtain brown viscous Thick thing, dry brown viscous thing, obtain powdered lemongrass extract, put lemongrass extract into refrigerator at 4 ℃ and save for later use.

[0064] (2) Dissolve 0.3 g of the lemongrass extract in water, stir and mix well to obtain the lemongrass extract. The pH value of the lemongrass extract was adjusted to 8.0 with NaOH solution.

[0065] (3) Weigh 0.136g of silver nitrate and dissolve it in deionized water, so that the molar mass ratio of the lemongrass extract in the above lemongrass extract to the silver ion molar mass in the silver nitrate solution is 0.3g / 0.8mmol.

[0066] (4) Weigh a certain quali...

Embodiment 3

[0070] A synthetic method for spherical nano-silver particles, comprising the following steps:

[0071] (1) Pulverize the dried lemongrass, weigh 3g of lemongrass powder, add 100g of water, go through an oil bath at 100°C until boiling and keep boiling for 10 minutes, vacuum filter, and concentrate the resulting solution under reduced pressure to obtain brown viscous Thick thing, dry brown viscous thing, obtain powdered lemongrass extract, put lemongrass extract into refrigerator at 4 ℃ and save for later use.

[0072] (2) Dissolve 0.3 g of the lemongrass extract in water, stir and mix well to obtain the lemongrass extract. Utilize NaHCO3 solution to adjust the pH value of lemongrass extract to 8.0.

[0073] (3) Weigh 0.170g of silver nitrate and dissolve it in deionized water, so that the molar mass ratio of the lemongrass extract in the above lemongrass extract to the silver ion molar mass in the silver nitrate solution is 0.3g / 1.0mmol.

[0074] (4) Weigh a certain quality...

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Abstract

The invention provides a synthesis method for spherical nano-silver particles and the spherical nano-silver particles. The synthesis method for the spherical nano-silver particles comprises the steps that lemon grass extracts are prepared, the lemon grass extracts and water are evenly mixed for obtaining a lemon grass extracting solution, and the pH value of the lemon grass extracting solution is regulated to be alkaline; a soluble silver slat solution and a starch solution are prepared and evenly mixed for obtaining a silver salt mixed solution; and alkaline the lemon grass extracting solution and the silver salt mixed solution are evenly mixed and react at a set temperature for a set period of time, so that a solution containing the spherical nano-silver particles is obtained. According to the synthesis method for the spherical nano-silver particles and the spherical nano-silver particles, the problems that according to an existing synthesis method for spherical nano-silver particles, pollution can be caused, and the environmental friendliness requirement cannot be met can be solved; and in addition, the synthesis cost is low, the synthesized spherical nano-silver particles are small in diameter and high in antibacterial ability.

Description

technical field [0001] The invention relates to the technical field of preparation of nano-silver particles, in particular to a method for synthesizing spherical nano-silver particles and the spherical nano-silver particles. Background technique [0002] With the development of science and technology, people's requirements for the quality of life are improved, and consumers' requirements for food freshness and hygiene are also getting higher and higher. Human beings cannot survive without food, but improper preservation of food will cause microbial erosion, so antibacterial packaging is in urgent need of people. Due to the high specific surface area and pore size distribution of nanomaterials, after the traditional packaging materials are modified by nanotechnology, the materials have the characteristics of high strength, high hardness, high toughness, high barrier properties, high degradability and high antibacterial ability. It is most beneficial to realize the environmen...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00B82Y30/00
CPCB82Y30/00B22F9/24B22F1/065B22F1/054
Inventor 陈广学李易蔚陈奇峰何明辉田君飞
Owner SOUTH CHINA UNIV OF TECH
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