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Method for preparing monodispersing decahedral gold nano-particles in ethylene glycol

A technology for the production of ethylene glycol and nanoparticles, which is applied in chemical instruments and methods, crystal growth, metal processing equipment, etc. It can solve the problems of unavoidable oxidation and etching, and achieve rich raw materials, good absorption performance, and high yield high effect

Inactive Publication Date: 2017-06-13
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the unavoidable oxidation and etching in the actual synthesis of gold nanoparticles, there are still many challenges in the high-yield synthesis of monodisperse, scale-tunable, twinned gold decahedral nanoparticles.

Method used

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  • Method for preparing monodispersing decahedral gold nano-particles in ethylene glycol
  • Method for preparing monodispersing decahedral gold nano-particles in ethylene glycol
  • Method for preparing monodispersing decahedral gold nano-particles in ethylene glycol

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Preparation of 30 nm Monodisperse Gold Decahedral Nanoparticles

[0028]First add polydiallyldimethylammonium chloride (PDDA, Mw=100000-200000, 20 wt%) aqueous solution to the ethylene glycol solution, stir well to obtain a mixed solution; then add in sequence under magnetic stirring conditions Chlorauric acid (HAuCl4), and a small amount of silver nitrate (AgNO3), iron trichloride (FeCl3), sodium bicarbonate (NaHCO3) aqueous solution to obtain a reaction precursor solution, in which polydiallyl dimethyl ammonium chloride (PDDA), chloroauric acid (HAuCl4), silver nitrate (AgNO3), ferric chloride (FeCl3), sodium bicarbonate (NaHCO3) in the precursor concentration are 0.025 mol / L, 0.00025 mol / L, 0.0016 mol / L, 0.00000025 mol / L, 0.00025 mol / L; then, the reaction precursor solution was placed at 215°C for 1 hour to obtain a red colloid solution, which was naturally cooled to room temperature, and then used a high-speed centrifuge at a speed of 14500 rpm After centrifuging f...

Embodiment 2

[0030] Preparation of 40 nm Monodisperse Gold Decahedral Nanoparticles

[0031] First add the ethylene glycol (EG) solution with a concentration of 0.025 mol / L into the reaction vessel; then add ascorbic acid (AA) and chloroauric acid (HAuCl4) solutions to the reaction vessel in sequence and shake well; The gold decahedral nanoparticles synthesized by the preparation method in Example 1 were added to the mixed solution to obtain a reaction precursor solution, in which polydiallyldimethylammonium chloride (PDDA), ascorbic acid (AA), chloroauric acid (HAuCl4), the concentrations of gold decahedral nanoparticle seeds were 0.025 mol / L, 0.005 mol / L, 0.00005 mol / L, and 0.000125 mol / L; finally, the reaction precursor solution was placed at room temperature and reacted for 30 minutes, Obtain purple-red colloidal solution, use high-speed centrifuge to centrifuge under the condition of rotating speed 12000 rpm for 20 minutes, remove the colorless solution in the centrifuge tube to obtai...

Embodiment 3

[0033] Preparation of 50 nm Monodisperse Gold Decahedral Nanoparticles

[0034] First add the ethylene glycol (EG) solution with a concentration of 0.025 mol / L into the reaction vessel; then add ascorbic acid (AA) and chloroauric acid (HAuCl4) solutions to the reaction vessel in sequence and shake well; The gold decahedral nanoparticles synthesized by the preparation method in Example 1 were added to the mixed solution to obtain a reaction precursor solution, in which polydiallyldimethylammonium chloride (PDDA), ascorbic acid (AA), chloroauric acid (HAuCl4), the concentrations of gold decahedral nanoparticle seeds were 0.025 mol / L, 0.005 mol / L, 0.0001 mol / L, and 0.000125 mol / L; finally, the reaction precursor solution was placed at room temperature and reacted for 30 minutes, Obtain a blue colloidal solution, centrifuge at a speed of 11,000 rpm for 10 minutes with a high-speed centrifuge, remove the colorless solution in the centrifuge tube to obtain a blue precipitate product...

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Abstract

The invention relates to a method for preparing monodispersing decahedral gold nano-particles in different sizes in ethylene glycol. The method has the advantages of being simple in operation, applicable to large-scale synthesis and the like; obtained decahedral gold nano-particles have the advantages of being high in yield, uniform in size, adjustable in dimension and the like. The method comprises the steps of (1) taking the ethylene glycol as solvent, poly diallyldimethylammonium chloride and silver nitrate as morphological regulator to obtain 30 decahedral gold nanoscale particle colloids through a polyol process; (2) adding the decahedral gold nanoscale particle colloids obtain in the step (1) into an ethylene glycol solution containing chloroauric acid and ascorbic acid, and regulating the experimental parameters such as precursor concentration, reaction time and reaction temperature to obtain the decahedral gold nano-particles uniform in size and different in dimension. The obtained decahedral gold nano-particles are good in stability and excellent in optical absorption properties and accordingly have high application values in aspects of plasma optical and medical detection and catalysis and the like.

Description

technical field [0001] The invention relates to a method for controllably preparing monodisperse gold decahedral nanoparticles in ethylene glycol solution. Background technique [0002] Gold nanoparticles are nanoparticles with surface plasmon resonance absorption properties, which have important applications in many fields such as surface plasmon optics, surface-enhanced Raman scattering (SERS), biomedicine, catalysis, and photothermal therapy. The light absorption properties of gold nanoparticles are mainly determined by their size and shape. The synthesis of monodisperse gold nanoparticles is crucial for their application and performance research. In order to controllably obtain gold nanoparticles, researchers have developed a variety of gold nanoparticle methods including chemical reagent reduction method, phase transfer method, micelle and reverse micelle method, thermochemical method, photochemical method, sonochemical method, and seed growth method. particle synthes...

Claims

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Application Information

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IPC IPC(8): B22F9/24B22F1/00C30B28/04
CPCC30B28/04B22F9/24B22F2009/245B22F1/0553B22F1/054
Inventor 张涛李村成姜春雪韩晓楠徐波
Owner UNIV OF JINAN
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