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Preparation method of gold nanoparticles

A gold nanoparticle, chloroauric acid technology, applied in the preparation of organic compounds, chemical instruments and methods, catalyst activation/preparation, etc., can solve the problems of environmental pollution, non-degradation, and high cost, and achieve uniform particle size and low cost. , The effect of taking materials is convenient

Inactive Publication Date: 2018-12-14
YANSHAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These polymers have disadvantages such as high cost, non-degradable and environmental pollution.

Method used

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  • Preparation method of gold nanoparticles
  • Preparation method of gold nanoparticles
  • Preparation method of gold nanoparticles

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preparation example Construction

[0030] The invention provides a method for preparing gold nanoparticles, comprising the following steps:

[0031] The ginkgo biloba polysaccharide solution and the chloroauric acid solution are mixed, the reduction reaction of the chloroauric acid is carried out, and the obtained reduction product system is dialyzed to obtain gold nanoparticles.

[0032] In the present invention, the mass concentration of the ginkgo leaf polysaccharide solution is preferably 0.1-30 mg / mL, more preferably 1-25 mg / mL, most preferably 5-20 mg / mL. In the present invention, the ginkgo leaf polysaccharide is preferably dissolved in deionized water to obtain a ginkgo leaf polysaccharide solution.

[0033] The present invention has no special limitation on the source of the ginkgo leaf polysaccharide, and the ginkgo leaf polysaccharide product prepared by a method well known to those skilled in the art can be used. In the present invention, the preparation method of the ginkgo leaf polysaccharide pre...

Embodiment 1

[0045] Ginkgo leaf polysaccharide was dissolved in deionized water to prepare 0.1mg / mL ginkgo leaf polysaccharide solution, and 0.1mg / mL ginkgo leaf polysaccharide solution and 0.1mmol / mL chloroauric acid solution The molar ratio of 1:10 is mixed in the centrifuge tube, and then the centrifuge tube is put into the constant temperature metal mixer, the speed of the constant temperature metal mixer is controlled to 400rpm, and the temperature of the constant temperature metal mixer is 20°C. After the reduction reaction for 4 hours, the mixed solution turned purple, and the mixed solution was dialyzed with a dialysis bag with a molecular weight cut-off of 8000-14000 to obtain a solution of ginkgo biloba polysaccharide-gold 10 nanoparticles.

[0046] figure 1 It is a transmission electron microscope picture of Ginkgo biloba polysaccharide-gold 10 nanoparticles, showing that its shape is spherical. figure 2 for figure 1 The particle size distribution histogram of the Ginkgo bilo...

Embodiment 2

[0049] Ginkgo leaf polysaccharide was dissolved in deionized water to prepare 1mg / mL ginkgo leaf polysaccharide solution, and 1mg / mL ginkgo leaf polysaccharide solution and 1mmol / mL chloroauric acid solution were prepared according to the molar ratio of ginkgo leaf polysaccharide and chloroauric acid Mix it in a centrifuge tube at a ratio of 1:70, then put the centrifuge tube into a constant temperature metal mixer, control the speed of the constant temperature metal mixer to 500rpm, and the temperature of the constant temperature metal mixer to 40°C, and carry out the reduction reaction for 5h , when the mixed solution turns purple, dialyze the mixed solution with a dialysis bag with a molecular weight cut-off of 8000-14000 to obtain a solution of ginkgo biloba polysaccharide-gold 70 nanoparticles.

[0050] Figure 4 It is a transmission electron microscope picture of Ginkgo biloba polysaccharide-gold 70 nanoparticles, showing that its shape is spherical. Figure 5 for Fig...

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Abstract

The invention provides a preparation method of gold nanoparticles. A ginkgo biloba leaf polysaccharide solution and a chloroauric acid solution are mixed to carry out a reduction reaction of chloroauric acid, and an obtained reduction product system is dialyzed to obtain gold nanoparticles. The gold nanoparticles are prepared by using the ginkgo biloba leaf polysaccharide as a template; the operation is simple and the reaction process is easy to control; the particle size of the prepared gold nanoparticles is 5-7 nm, the particle size is uniform, and the gold nanoparticles have high specific surface area of 36-63 m<2> / g and can highly efficiently catalyze the reduction of p-nitrophenol.

Description

technical field [0001] The invention relates to the technical field of nanometer metal materials, in particular to a preparation method of gold nanoparticles. Background technique [0002] Organic pollutants in water seriously endanger our living environment, and the development of nanocatalysts that can efficiently catalyze the conversion of organic pollutants has become the focus of attention. Noble metal nanocatalysts can effectively catalyze the reduction of organic pollutants such as p-nitrophenol, and catalyze them into useful products such as p-aminophenol. However, nano-noble metal materials are unstable and easy to agglomerate in aqueous solution, which reduces the catalytic performance of noble metal nanoparticles. At present, enhancing the stability of noble metal nanoparticles with the help of templates has become a better solution. However, most of the templates are artificially synthesized organic polymers. These polymers have disadvantages such as high cost...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/52B01J31/26B01J35/10B01J37/16C07C215/76C07C213/02
CPCC07C213/02B01J23/52B01J31/26B01J37/16B01J35/393B01J35/23B01J35/613C07C215/76
Inventor 梁波崔艳帅刘建王龙刚杨静凯
Owner YANSHAN UNIV
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