A method for synthesizing core-shell structure carbon-coated gold nanoparticles with regular spherical morphology

A technology of core-shell structure and nanoparticles, which is applied in nanotechnology, transportation and packaging, metal processing equipment, etc., and can solve the problems of strong physical and chemical inertness

Active Publication Date: 2021-07-06
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although SiO 2 It is a relatively stable coating material, but due to its own shortcomings, such as its strong physical and chemical inertia, its application is limited to a certain extent

Method used

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  • A method for synthesizing core-shell structure carbon-coated gold nanoparticles with regular spherical morphology
  • A method for synthesizing core-shell structure carbon-coated gold nanoparticles with regular spherical morphology
  • A method for synthesizing core-shell structure carbon-coated gold nanoparticles with regular spherical morphology

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specific Embodiment approach 1

[0014] Specific embodiment 1: In this embodiment, a method for synthesizing core-shell structure carbon-coated gold nanoparticles with regular spherical morphology is realized according to the following steps:

[0015] 1. Preparation of nano-gold particles: HAuCl4 and sodium borohydride with a molar ratio of 1:0.2-0.5 were dissolved in water, and stirred at room temperature for 10-25 minutes to obtain a nano-gold particle solution.

[0016] 2. Add a hydroquinone (resorcinol) solution with a molar ratio of 1 to 50 to HAuCl4 to the gold nanoparticle solution prepared in step 1, stir at room temperature for 10 to 25 minutes, and then add a solution with a molar ratio of 2 to HAuCl4. 100% formaldehyde solution (formaldehyde solution with a mass fraction of 37%), stirred at room temperature for 10-25min, then added absolute ethanol with a molar ratio of 500-700 to HAuCl4, stirred at room temperature for 10-25min, then added dropwise with HAuCl4 molar ratio of 5~10, ammonia solution...

specific Embodiment approach 2

[0019] Embodiment 2: This embodiment differs from Embodiment 1 in that the molar ratio of resorcinol to HAuCl4 added in step 2 is 10-50:1. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0020] Embodiment 3: This embodiment is different from Embodiment 2 in that the molar ratio of resorcinol to HAuCl4 added in step 2 is 25-50:1. Other steps and parameters are the same as in the second embodiment.

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Abstract

A method for synthesizing core-shell structure carbon-coated gold nanoparticles with regular spherical morphology. The invention relates to the field of inorganic materials, in particular to its synthesis method. The present invention is to invent a method for synthesizing core-shell structure carbon-coated gold nanoparticles with a regular spherical shape, and can adjust the size of the core-gold nanoparticles and the thickness of the shell-resin layer according to actual needs. Applications provide a wide range of spaces. Product: Prepared from gold source, reducing agent-sodium borohydride, quinone and formaldehyde solution as carbon source, ammonia, ethanol and water. Method: add gold source and reducing agent into the water phase, then mix gold nanoparticles with carbon source, then add absolute ethanol and ammonia water, react at room temperature, then centrifuge and dry, and roast under an inert atmosphere to obtain spherical nuclei Shell-structured carbon-coated gold nanoparticles. The core-shell structure carbon-coated gold nanoparticle with spherical shape synthesized by the method of the present invention has better spherical shape and monodispersity, and the particle size can be controllably modulated between 50 and 250 nm.

Description

technical field [0001] The invention relates to a method for synthesizing a core-shell structure carbon-coated gold nanoparticle with a regular spherical shape. Background technique [0002] Due to the unique physical, chemical and optical properties of gold nanoparticles, they have been widely used in the fields of biomedicine, chemical catalysis and new energy development in recent years. Due to the high surface free energy, gold nanoparticles are prone to agglomeration and lose their excellent properties. In order to better prevent the agglomeration of gold nanoparticles, researchers usually adopt the form of dispersion and coating to prevent the agglomeration of gold nanoparticles during use. Luo Chunhua and others successfully prepared polymer-coated gold nanoparticles by surface graft polymerization. The preparation method is complicated. The polymer is attached to the surface of gold nanoparticles, but the distribution is not uniform, and the obtained microspheres ha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/02B82Y40/00
CPCB82Y40/00B22F9/24B22F1/07B22F1/065B22F1/16
Inventor 刘献斌张芯蕊邓尚孙艳
Owner HARBIN UNIV OF SCI & TECH
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