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Preparation method of precious metal nano-particles

A nanoparticle and precious metal technology, applied in the field of nanoparticle preparation, can solve the problems of uncontrollable nanoparticle size and affect the functionality of nanoparticles, and achieve good surface-enhanced Raman effect, high current density, and uniform particle size. Effect

Inactive Publication Date: 2013-04-17
惠州市创生机电技术服务有限公司
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] The current method of preparing noble metal nanoparticles produces a layer of organic molecules adsorbed on the surface of the nanoparticles, which affects the functionality of the nanoparticles, and the particle size of the nanoparticles is uncontrollable

Method used

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  • Preparation method of precious metal nano-particles
  • Preparation method of precious metal nano-particles
  • Preparation method of precious metal nano-particles

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specific Embodiment approach 1

[0035] Specific embodiment 1: In this embodiment, a method for preparing noble metal nanoparticles is specifically prepared according to the following steps:

[0036] 1. Preparation of cuprous oxide nanoparticles: Add surfactant and copper salt solution into ultrapure water, stir evenly, then add sodium hydroxide solution, keep for 10min~12min, then add ascorbic acid solution, keep for 30min~40min, get product solution, and then centrifuge the product solution at a speed of 8000rpm~15000rpm for 5min~10min, and then wash the obtained solid phase with deionized water for 3~5 times to obtain cuprous oxide nanoparticles; wherein, the copper salt solution The concentration of sodium hydroxide solution is 0.01mol / L~1mol / L, the concentration of sodium hydroxide solution is 0.1mol / L~6.1mol / L, the concentration of ascorbic acid solution is 0.1mol / L~2mol / L; the quality of surfactant and copper The ratio of the amount of salt is (3g~3.33g): 0.1mmol, the ratio of the mass of surfactant to...

specific Embodiment approach 2

[0039] Embodiment 2: This embodiment is different from Embodiment 1 in that the surfactant in step 1 is polyvinyl alcohol or polyvinylpyrrolidone. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0040] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the copper salt solution in step 1 is copper acetate solution, copper chloride solution, copper nitrate solution or copper sulfate solution. Others are the same as in the first or second embodiment.

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Abstract

The invention provides a preparation method of precious metal nano-particles and relates to preparation methods of nano-particles. The preparation method of precious metal nano-particles mainly solves the problem that a layer of organic molecules are adsorbed on the surfaces of nano-particles prepared by a method for preparing metal nano-particles at present, functionality of the nano-particles is influenced, and particle sizes of the nano-particles cannot be controlled. The method includes: firstly preparing cuprous oxide nano-particles; and secondly preparing the precious metal nano-particles. The preparation method uses cuprous oxide as a reducing agent, the precious metal nano-particles with clean surfaces can be prepared, no other external conditions and processes is needed, particle sizes of the prepared nano-particles are even, and particle sizes of the precious metal nano-particles can be controlled through controlling of particle sizes of the cuprous oxide nano-particles. The nano-particles prepared by the method have good surface enhanced Raman effect, large in electric catalytic current density and high in electrochemical active area retention rate. The precious metal nano-particles prepared by the method are applied to the field of electro-catalysis and molecular detection.

Description

technical field [0001] The present invention relates to a method for preparing nanoparticles. Background technique [0002] Nanoparticles of precious metals such as gold, silver, platinum, and palladium have extremely important application values ​​in the fields of chemistry, biology, physics, materials, and medicine. In traditional solution chemical synthesis methods, capping agents, surfactants, and stabilizers are widely used to promote or inhibit the growth of metal nanoparticles, so that nanoparticles with specific crystal orientation, morphology, and size can be obtained. However, when these macromolecules are used to control the growth of noble metal nanoparticles, a layer of organic molecules will be adsorbed on the surface of the nanoparticles, which will have a negative effect on the functionalization of the nanoparticles. Researchers at the Lawrence Berkeley National Laboratory in the United States have found that the catalytic performance of platinum nanoparticl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 徐平张彬杜耘辰韩喜江康磊磊
Owner 惠州市创生机电技术服务有限公司
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