Synthetic method of decahedron nanogold

A synthesis method and nano-gold technology, applied in the field of nano-gold, can solve the problems of low yield, non-uniform particle size of decahedral nano-gold particles, complex synthesis steps, etc., and achieve easy separation, simple operation, and particle size. Narrow distribution of effects

Inactive Publication Date: 2010-06-30
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the particle size of the decahedral gold nanoparticles prepared by these methods is not uniform, the yield is not high, and the gold species prepared in the previous stage need to be added, and the synthesis steps are complicated.

Method used

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  • Synthetic method of decahedron nanogold
  • Synthetic method of decahedron nanogold
  • Synthetic method of decahedron nanogold

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1) Take 0.277g polyvinylpyrrolidone, dissolve it in 20mL N, N'-dimethylamide, stir evenly, the molecular weight of polyvinylpyrrolidone is 8000.

[0027] 2) Add the chloroauric acid solution and stir at room temperature for 10 minutes to obtain a reaction precursor solution. The concentration of chloroauric acid is 0.01M in molar ratio, and the ratio of polyvinylpyrrolidone: chloroauric acid is 100:1.

[0028] 3) Pour the reaction precursor solution into a microwave reaction tank, and put it into a microwave reactor, the reaction temperature is 150° C., and the reaction time is 30 minutes.

[0029] 4) The reaction system was naturally cooled to room temperature. Centrifuge at a rotational speed of 3000 rpm to separate the synthesized gold nanoparticles from polyvinylpyrrolidone, and then wash with absolute ethanol for 3 times. The particle size of the obtained decahedral gold nanoparticles is about 180nm.

Embodiment 2

[0031] 1) Take 0.277g polyvinylpyrrolidone, dissolve it in 23mL N, N'-dimethylamide, stir well, the molecular weight of polyvinylpyrrolidone is 20000.

[0032] 2) Add chloroauric acid solution and stir at room temperature for 10 minutes to obtain a reaction precursor solution. The concentration of chloroauric acid is 0.001M in molar ratio, and the ratio of polyvinylpyrrolidone: chloroauric acid is 50:1.

[0033] 3) Pour the reaction precursor solution into a microwave reaction tank, and put it into a microwave reactor, the reaction temperature is 200° C., and the reaction time is 1 min.

[0034] 4) The reaction system was naturally cooled to room temperature. Centrifuge at a rotational speed of 2500 rpm to separate the synthesized gold nanoparticles from polyvinylpyrrolidone, and then wash with deionized water for 3 times. The particle size of the obtained decahedral gold nanoparticles is about 180nm.

Embodiment 3

[0036] 1) Take 0.277g polyvinylpyrrolidone, dissolve it in 24.5mL N, N'-dimethylamide, stir evenly, the molecular weight of polyvinylpyrrolidone is 63000.

[0037] 2) Add the chloroauric acid solution and stir at room temperature for 10 minutes to obtain a reaction precursor solution. The concentration of chloroauric acid is 0.05M in molar ratio, and the ratio of polyvinylpyrrolidone: chloroauric acid is 500:1.

[0038] 3) Pour the reaction precursor solution into a microwave reaction tank, and put it into a microwave reactor, the reaction temperature is 100° C., and the reaction time is 60 minutes.

[0039] 4) The reaction system was naturally cooled to room temperature. Centrifuge at a rotational speed of 3500 rpm to separate the synthesized gold nanoparticles from polyvinylpyrrolidone, and then wash with acetone for 3 times. The particle size of the obtained decahedral gold nanoparticles is about 100 nm.

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Abstract

The invention discloses a method for synthesizing decahedron nano gold and relates to a nano gold, in particular to a method for one-step control and synthesis of decahedron nano gold particles by a microwave method. In the method, plasmosan is taken as a wrapping agent, N, N'-dimethylformamide as a reducing agent and a microwave method is adopted. The plasmosan is added into the N, N'-dimethylformamide, stirred and dissolved; chloroauric acid is added after the plasmosan is fully dissolved, and stirred to obtain reaction precursor solution; the reaction precursor solution is poured into a microwave retort and then put into a microwave heater for reacting. A reaction system naturally cools to the room temperature, centrifugation is carried out to separate the synthesized nano gold particles and the plasmosan, and the decahedron nano gold product is obtained by cleaning.

Description

technical field [0001] The invention relates to a nano-gold, in particular to a method for controlling and synthesizing decahedral nano-gold particles in one step by using a microwave method. Background technique [0002] As a typical mesoscopic system, nanoparticles have many unique properties different from bulk materials and individual molecules. As an extremely important member of the nanoparticle system, gold nanoparticles also have unique physical and chemical properties, such as good biocompatibility, making gold nanoparticles widely used in biomarkers and biosensing, and excellent electrical properties. , chemical properties make it used in electronic products and high-efficiency catalysts. Compared with ordinary gold nanoparticles, gold nanoparticles with special shapes often exhibit more unique properties and wider potential applications, and are expected to be used in biology, medicine, information storage, chemistry, sensors and other fields. Despite the unique...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24C30B29/02C30B30/00C30B7/14
Inventor 张其清李思越翁建
Owner XIAMEN UNIV
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