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Synthetic method of noble metal nano-particles

A nanoparticle and synthesis method technology, applied in the fields of biotechnology and nanomaterials, can solve the problems of time-consuming, energy consumption of precious metal nanoparticle synthesis, environmental pollution, etc., and achieve uniform size distribution, safe and harmless source of raw materials, and short reaction time. Effect

Inactive Publication Date: 2019-06-18
JIANGNAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Purpose of the invention: the technical problem to be solved in the present invention is to provide a method for synthesizing precious metal nanoparticles by utilizing Du pear stem extract (PSE) as a reducing agent and a stabilizing agent, so as to solve the problem of energy consumption and time-consuming synthesis of existing precious metal nanoparticles. And environmental pollution and other issues, but also developed a new reducing agent for the synthesis of metal nanoparticles

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1 preparation method of Du pear stalk extract

[0028] Weigh 50g of pear stalk and cut it short, add 200mL of water, boil for 30min, filter with a layer of filter paper to obtain the filtrate, centrifuge the filtrate at 7000rpm for 20min, take the supernatant and freeze-dry it into powder to obtain the water extract of pear stalk (PSE) powder , standby, see preparation process figure 1 .

Embodiment 2

[0029] Example 2 PSE synthesis of gold nanoparticles

[0030] PSE powder is made into the aqueous solution of 10mg / mL, gets 0.625mL and joins in the chloroauric acid aqueous solution of 10mL 50mg / L, stirring reaction, reaction temperature is room temperature. Samples were taken at 5, 15, 30 and 60 minutes and photographed. see results figure 2 , wine red appeared in the reaction solution in 5min, this color is the characteristic color of gold nanoparticle, and promptly synthesized gold nanoparticle after explanation reacting 5min.

Embodiment 3

[0031] Example 3 PSE synthesis of silver nanoparticles

[0032] PSE is made into the solution of 10mg / mL, gets 0.625mL and joins in the silver nitrate solution of 10mL 50mg / L, stirs reaction. Samples were taken and photographed at 5, 15, 30 and 60 min, respectively. see results image 3 , brownish yellow appeared in the reaction solution at 15min, which is the characteristic color of silver nanoparticles, indicating that silver nanoparticles were synthesized after 15min of reaction.

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Abstract

The invention discloses a synthetic method of noble metal nano-particles. The synthetic method comprises the following steps of dispersing a water extract of a pyrus betulaefolia stem in a noble metalsolution to react to obtain noble metal nano particles, wherein the noble metal is selected from gold or / and silver. According to the synthetic method of the noble metal nano-particles, the water extract of the pyrus betulaefolia rod is taken as a reducing agent and a stabilizer, a chloroauric acid or silver nitrate solution is used as a raw material, the reaction time is short so as to prepare the uniformly-distributed noble metal nano-particles. A transmission electron microscope shows that the size distribution of the synthesized noble metal nano particles is uniform, the average size of the gold nano particles is about 52.2 nm, the average size of the silver nano-particles is about 19.9 nm, and the silver nano-particles have good dispersity. According to the synthetic method of noblemetal nano-particles, the raw materials are safe and harmless, the reaction time is short, the reaction temperature is only normal temperature, and therefore, the synthetic method is expected to be widely applied to the aspect of green synthesis of noble metal nanoparticles.

Description

technical field [0001] The invention belongs to the field of biotechnology and nanomaterials, relates to the synthesis of nanoparticles, in particular to a method for synthesizing noble metal nanoparticles. Background technique [0002] At present, nanotechnology has been widely used in all walks of life, has been vigorously developed, and has received extensive attention. Nanoparticles have good antibacterial, anti-inflammatory, anti-oxidative and anti-angiogenesis effects, which reflect a good therapeutic effect and are widely used in the fields of biomedicine, electronics, agriculture and light industry. Compared with other bulk materials, due to their special The unique size, shape, specific surface area, and compositional characteristics endow them with superior physical and chemical properties, mechanical properties, thermal stability, and biological properties. [0003] The synthesis methods of metal nanoparticles include chemical methods, physical methods and biolog...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y40/00
Inventor 李程程陈东丁健王利斌史仲平
Owner JIANGNAN UNIV
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