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A kind of preparation method of regular spherical silver nanoparticles

A silver nanoparticle and spherical technology, applied in the direction of nanotechnology, etc., to achieve the effect of easy to meet the experimental conditions, excellent plasma resonance characteristics, and simple and easy experimental operation

Active Publication Date: 2017-02-22
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, this method cannot be popularized on a large scale to reduce costs and achieve commercialization.

Method used

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  • A kind of preparation method of regular spherical silver nanoparticles
  • A kind of preparation method of regular spherical silver nanoparticles
  • A kind of preparation method of regular spherical silver nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] A preparation method of regular spherical silver nanoparticles, characterized in that the preparation method comprises the following steps:

[0062] 10. Preparation of irregular silver nanoparticles precursor colloid. Include the following steps:

[0063] 101. Clean a 700ml beaker with alcohol and ultrapure water in sequence, add 500ml of silver nitrate solution with a concentration of 0.53mmol / L, place it on an electric stove, and heat it to boiling. Using a separatory funnel, 10 ml of a sodium citrate solution with a concentration of 3.4 mmol / L was added dropwise to the solution, and at the same time, a stirrer was used for rapid physical stirring.

[0064] 102. After the reaction time is about 25 minutes, turn off the electric furnace, and let the prepared precursor colloid cool down to room temperature naturally.

[0065] 20. Preparation of regular spherical silver nanoparticles by using precursor silver colloid. Include the following steps:

[0066] 201. Place ...

Embodiment 2

[0072] A preparation method of regular spherical silver nanoparticles, characterized in that the preparation method comprises the following steps:

[0073] 10. Preparation of irregular silver nanoparticles precursor colloid. Include the following steps:

[0074] 101. Clean a 700ml beaker with alcohol and ultrapure water in sequence, add 500ml of silver nitrate solution with a concentration of 0.53mmol / L, place it on an electric stove, and heat it to boiling. Using a separatory funnel, 10 ml of a sodium citrate solution with a concentration of 3.4 mmol / L was added dropwise to the solution, and at the same time, a stirrer was used for rapid physical stirring.

[0075] 102. After the reaction time is about 25 minutes, turn off the electric furnace, and let the prepared precursor colloid cool down to room temperature naturally.

[0076] 20. Preparation of regular spherical silver nanoparticles by using precursor silver colloid. Include the following steps:

[0077] 201. Place ...

Embodiment 3

[0083] A preparation method of regular spherical silver nanoparticles, characterized in that the preparation method comprises the following steps:

[0084] 10. Preparation of irregular silver nanoparticles precursor colloid. Include the following steps:

[0085] 101. Clean a 700ml beaker with alcohol and ultrapure water in sequence, add 500ml of silver nitrate solution with a concentration of 0.53mmol / L, place it on an electric stove, and heat it to boiling. Using a separatory funnel, 10 ml of a sodium citrate solution with a concentration of 3.4 mmol / L was added dropwise to the solution, and at the same time, a stirrer was used for rapid physical stirring.

[0086]102. After the reaction time is about 25 minutes, turn off the electric furnace, and let the prepared precursor colloid cool down to room temperature naturally.

[0087] 20. Preparation of regular spherical silver nanoparticles by using precursor silver colloid. Include the following steps:

[0088] 201. Place 2...

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Abstract

The invention provides a simple preparing method for regular spherical silver nanometer particles and belongs to the technical field of precious metal nanometer system preparing. The method comprises the following steps that 10, 500 ml of a silver nitrate solution with the molar concentration of 0.53 mmol / L is placed on an electric furnace, and heated to be boiled, and 10 ml of a sodium citrate solution with the molar concentration of 3.4-3.7 mmol / L is added drop by drop so as to prepare silver nanometer particle precursor colloids irregular in shape; 20, 200 ml of the precursor silver colloids are placed into a Petri dish rotating at the rotating speed of 5 r / min, KrF excimer laser with the wave length of 248 nm is utilized for irradiating the colloids, the single pulse energy density is controlled to range from 85 mJ / cm<2> to 150 mJ / cm<2>, and air flow is blown into the surface of liquid in the inverse rotating direction so as to ensure that the colloid solution receives the uniform irradiation intensity. The preparing method can prepare the stable monodispersed silver nanometer particles with the regular spherical surfaces fast and efficiently in a large-scale mode.

Description

technical field [0001] The invention belongs to the field of preparation of noble metal nano system, and relates to a method for preparing spherical silver nanoparticles with regular appearance. Background technique [0002] Due to its unique small size effect, nano size effect and surface effect, silver nanoparticles exhibit unique properties, such as catalysis, electrical / thermal conduction, third-order nonlinear optical properties, and so on. These unique properties make silver nanoparticles have good applications in the fields of biology, catalysis, chemical industry, nano-optoelectronic devices, and surface-enhanced Raman scattering. Many properties and applications of silver nanoparticles are closely related to their surface morphology. The work of many scientific researchers has confirmed that the surface morphology of silver nanoparticles can significantly affect the electrical, magnetic, catalytic, surface plasmon and other effects of nanoparticles. [0003] The m...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B82Y40/00
Inventor 赵艳郭孟扬蒋毅坚
Owner BEIJING UNIV OF TECH
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