Preparation method of gold nano-clusters

A technology of gold nanoclusters and gold ions, applied in nanotechnology, nanotechnology, metal processing equipment, etc., can solve the problems of easy agglomeration stability, low synthesis and reaction efficiency, etc., to avoid agglomeration, improve reduction efficiency and synthesis efficiency , the effect of shortening the time

Pending Publication Date: 2021-01-05
SHENZHEN TECH UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies of the prior art, to provide a preparation method of gold nanoclusters, to solve the technical problems of low synthesis and reaction efficiency, easy agglomeration and poor stability in the existing preparation methods of gold nanoclusters

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  • Preparation method of gold nano-clusters

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[0017] The embodiment of the present invention provides a method for preparing gold nanoclusters. The preparation method technological process of described gold nanocluster is as follows figure 1 shown, including the following steps:

[0018] S01: Prepare a mixed solution containing reducing agent, stabilizer and trivalent gold ions;

[0019] S02: adjusting the pH of the mixed solution prepared in step S01 to alkaline to obtain an alkaline mixed solution;

[0020] S02: subjecting the alkaline mixed solution prepared in step S02 to microwave treatment to generate gold nanoclusters.

[0021] Wherein, the reducing agent, stabilizer and trivalent gold ions in step S01 constitute a reaction system for generating gold nanoclusters.

[0022] In the mixed solution, trivalent gold ions are used as the source of gold elements to generate gold nanoclusters. In one embodiment, the trivalent gold ions are preferably composed of one of chloroauric acid, sodium chloroaurate, potassium chl...

Embodiment 1

[0043] This example provides a preparation method of gold nanoclusters. The preparation method of described gold nanocluster comprises the method preparation of following steps:

[0044] S1: Sodium borohydride, 4-aminohippuric acid and chloroauric acid were respectively dissolved in water to prepare aqueous solutions of sodium borohydride, 4-aminohippuric acid and chloroauric acid respectively;

[0045] The aqueous solution of sodium borohydride, the aqueous solution of 4-aminohippuric acid and the aqueous solution of chloroauric acid are mixed to prepare a mixed aqueous solution containing trivalent gold ions; wherein, the mass percent concentration of sodium borohydride is 0.001%, 4 - The mass percent concentration of aminohippuric acid is 0.001%, the mass percent concentration of trivalent gold ions is 0.001%; ​​the total mass of the final mixed solution is 100g;

[0046] S2: adding dropwise sodium hydroxide solution to the mixed aqueous solution in step S1, adjusting the ...

Embodiment 2

[0049] This example provides a preparation method of gold nanoclusters. The preparation method of described gold nanocluster comprises the method preparation of following steps:

[0050] S1: Dissolve egg white protein (CEW), 1,2,3-triazole-4,5-dicarboxylic acid (TADA) and chloroauric acid in water to prepare aqueous solution of egg white protein (CEW), 1 , an aqueous solution of 2,3-triazole-4,5-dicarboxylic acid (TADA) and an aqueous solution of chloroauric acid;

[0051] Mix the aqueous solution of egg white protein (CEW), the aqueous solution of 1,2,3-triazole-4,5-dicarboxylic acid (TADA) and the aqueous solution of chloroauric acid to prepare a mixture containing trivalent gold ions Aqueous solution; wherein, the mass percentage concentration of egg white protein (CEW) is 10%, the mass percentage concentration of 1,2,3-triazole-4,5-dicarboxylic acid (TADA) is 10%, trivalent gold The mass percent concentration of ions is 2%; the total mass of the final mixed solution is 5...

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Abstract

The invention provides a preparation method of gold nano-clusters. The preparation method of the gold nano-clusters comprises the following steps that a mixed solution containing a reducing agent, a stabilizing agent and trivalent gold ions is prepared; the pH value of the mixed solution is adjusted to be alkaline to obtain an alkaline mixed solution; and the alkaline mixed solution is subjected to microwave treatment to generate the gold nano-clusters. According to the preparation method of the gold nano-clusters, microwave treatment is carried out on the alkaline mixed solution, the reduction efficiency and the synthesis efficiency of the alkaline mixed solution can be effectively improved, and the reduction reaction time is remarkably shortened. In addition, the microwave treatment canalso play a synergistic effect with the stabilizing agent so that the consistency of the generated gold nano-cluster products can be better controlled, and the gold nano-clusters are effectively prevented from being agglomerated. Furthermore, the alkaline mixed solution can be uniformly heated through microwave treatment, and the method is suitable for synthesis of the gold nano-clusters with large sample amount.

Description

technical field [0001] The invention relates to a preparation method of gold nano clusters. Background technique [0002] Gold nanoclusters (AuNCs) are between Au atoms and Au nanoparticles, usually composed of several to tens of atoms, and the particle size is generally less than 2nm, which is between traditional organometallic compounds and crystalline metal nanoparticles, so It has a series of unique physical properties, such as photoluminescence, quantum size effect, etc. The size of AuNCs is close to the wavelength range of the Fermi level of electrons, which will show strong luminescent properties. [0003] Compared with traditional organic fluorescent dyes, rare earth fluorescent materials and semiconductor fluorescent quantum dots, AuNCs have unique fluorescent tunable properties, high quantum yields (QYs), and are relatively simple and mild to prepare. They are a new type of ideal fluorescent Materials have broad application prospects in fluorescence sensing, biom...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB22F9/24B82Y30/00B82Y40/00B22F1/054
Inventor 陈丽琼
Owner SHENZHEN TECH UNIV
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