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Method for synthesizing different sizes of nanogold composite materials through 2-aminoethanethiol regulation

A technology of aminoethanethiol and composite materials, which is applied in the synthesis field of nano-gold composite materials of different sizes, and achieves the effects of good stability, enhanced fluorescence and wide application prospects.

Inactive Publication Date: 2016-04-06
SHAANXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the analysis of relevant research results at home and abroad, it is found that there are few reports on the use of mercapto compounds to synthesize gold nanoparticles with larger particle sizes. Jiali Niu and TaoZhu (Nanotechnology, 2007, 18, 325607-325613) synthesized 15nm gold nanoparticles are used as seeds, and gold nanoparticles with a particle size of 30-150nm can be synthesized by adjusting the ratio of seed solution and mercaptosuccinic acid, but this method needs to be carried out on the basis of synthesizing nano-gold seeds, and it still needs to be realized in multiple steps Controlling the particle size of gold nanoparticles

Method used

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  • Method for synthesizing different sizes of nanogold composite materials through 2-aminoethanethiol regulation
  • Method for synthesizing different sizes of nanogold composite materials through 2-aminoethanethiol regulation
  • Method for synthesizing different sizes of nanogold composite materials through 2-aminoethanethiol regulation

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Experimental program
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Effect test

Embodiment 1

[0030] Add 0.021g of poly(styrene) / poly(acrylic acid) core-shell composite microgel into 35mL of twice distilled water, and disperse evenly by ultrasonic to prepare a 0.6g / L microgel dispersion; 20mL of 0.85mmol The tetrachloroalloy acid aqueous solution of / L and the 2-aminoethanethiol aqueous solution of 5mL0.032mol / L are mixed homogeneously, and the gained mixed solution joins in the microgel dispersion liquid, stirs and swells at room temperature under nitrogen protection for 7.5 hours, adds 10mL8. 0mmol / L sodium citrate aqueous solution, stirred for 30 minutes, then added dropwise 10mL0.028mol / L sodium borohydride aqueous solution, stirred for 2 hours and then kept in the dark for 5 days, the reaction product was centrifugally washed with absolute ethanol, freeze-dried, A gold nanocomposite was obtained.

[0031] The prepared nano-gold composites were characterized by JEM-21009 transmission electron microscope and U-3900 / 3900H (Japan Hitachi) ultraviolet-visible spectroph...

Embodiment 2

[0033] In embodiment 1, the 2-aminoethanethiol aqueous solution of 0.032mol / L is replaced with the 2-aminoethanethiol aqueous solution of equal volume 0.065mol / L, and other steps are identical with embodiment 1, obtain particle diameter and be about 20nm Nanogold composites (see image 3 ), and by Figure 4 It can be seen from the ultraviolet-visible absorption spectrum of the medium-nano-gold composite material that its maximum absorption peak appears at 527nm.

Embodiment 3

[0035] In embodiment 1, the 2-aminoethanethiol aqueous solution of 0.032mol / L is replaced with the 2-aminoethanethiol aqueous solution of equal volume 0.090mol / L, and other steps are identical with embodiment 1, obtain particle diameter and be about 30nm Nanogold composites (see Figure 5 ), and by Image 6 It can be seen from the ultraviolet-visible absorption spectrum of the medium-nano-gold composite material that its maximum absorption peak appears at 532nm.

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Abstract

The invention discloses a method for synthesizing different sizes of nanogold composite materials through 2-aminoethanethiol regulation. The method includes the steps that 2-aminoethanethiol is used for modifying HAuCl4; poly(styrene) / poly(acrylic acid) core-shell type microgel serves as a carrier; a modified HAuCl4 solution is fully swelled and enters a microgel three-dimensional net structure; and sodium borohydride serves as a reducing agent, sodium citrate serves as an auxiliary reducing agent and a stabilizing agent, and different sizes of nanogold composite materials are synthesized. According to the method, operation is simple, interaction force between carboxyl in the microgel and amino in the 2-aminoethanethiol and the area limiting function of a microgel shell net chain are utilized so that nanogold can grow on a microgel shell, meanwhile, stability of the nanogold is effectively controlled, the modification effect of sulfydryl and amino in the 2-aminoethanethiol on nanogold particles is utilized, small-particle-size nanogold can be assembled into the large-size nanogold composite materials by increasing the use amount of the 2-aminoethanethiol, and controllable synthesis of different sizes of nanogold is achieved.

Description

technical field [0001] The invention belongs to the technical field of synthesis of nano-gold composite materials with different sizes, and in particular relates to a method for controlling and synthesizing nano-gold composite materials with different sizes by using 2-aminoethanethiol. Background technique [0002] The synthesis of nanoparticles with different sizes and shapes has been widely concerned. Gold nanoparticles have been extensively studied due to their size- and shape-dependent physical and chemical properties, which make them have potential applications in the fields of optoelectronics, catalysis, electronics, and biomedicine. [0003] Usually, sodium citrate or functional molecules (such as surfactants and polymers, etc.) can be used to regulate the size and shape of gold nanoparticles. For example, sodium citrate slow reduction tetrachloroalloy acid method, by changing the conditions (ratio of sodium citrate and tetrachloroalloy acid, solution pH, solvent, etc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/02
CPCB22F9/24B22F1/16
Inventor 张颖滕小波姜春阁
Owner SHAANXI NORMAL UNIV