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Dry preparation method for bismuth nanoparticles

A bismuth nanometer and particle technology is applied in the field of preparation of dry bismuth nanoparticles, which can solve problems such as complicated steps and achieve the effect of simple method.

Inactive Publication Date: 2017-10-24
EAST CHINA NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the steps of the solution-phase chemical method are very complicated, requiring the use of toxic and highly sensitive drugs, and the solution environment and the compound itself inevitably introduce new impurities into the preparation of bismuth nanoparticles

Method used

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  • Dry preparation method for bismuth nanoparticles
  • Dry preparation method for bismuth nanoparticles
  • Dry preparation method for bismuth nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0017] Step 1: Gently scrape the bismuth nanowires grown on the substrate on the micro-grid with a clean blade, scraping 3 times.

[0018] Step 2: Put the microgrid obtained in Step 1 into a transmission electron microscope, turn on the electron gun, irradiate the electron beam onto the bismuth nanowire, and select 200kV for the accelerating voltage. Bismuth nanowires were observed as figure 1 shown.

[0019] Step 3: Operate the transmission electron microscope to enter the low-magnification imaging mode for observation, focus on the nanowires, and observe the nanowires until granular bismuth nanoparticles can be seen generated on the bismuth nanowires. The time taken is 2 minutes. The observed results are as figure 2 shown. It can be seen that the prepared bismuth nanoparticles are uniformly distributed on the surface of the bismuth nanowires. image 3 Shown is a high-resolution TEM image of a single bismuth nanoparticle, and it can be seen that the prepared bismuth nan...

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Abstract

The invention discloses a dry preparation method for bismuth nanoparticles. The method comprises the steps that firstly, a good growth bismuth nanowire or a bismuth nanosheet is transferred to a micro-grid, a copper mesh or a carbon film; then the obtained micro-grid, the copper mesh or the carbon film is placed in a transmission electron microscope, an electronic gun switch is turned on to enable electron beams to illuminate the bismuth nanowire or the bismuth nanosheet, accelerating voltage is 80kV-300kV, and time is 30-180 seconds; and the bismuth nanoparticles are obtained on the bismuth nanowire or the bismuth nanosheet. The method has the advantages that cleanness and high efficiency are realized, no surface active agent is necessary, the method is simple, and the obtained bismuth nanoparticles can be used as catalysts, contrast agents and the like.

Description

technical field [0001] The invention belongs to the field of material growth, and relates to a method for preparing bismuth nanoparticles in a dry process, in particular producing nanoparticles on grown bismuth nanowires by irradiating resistance beams. Background technique [0002] Metal nanoparticles play an important role in many fields because of their unique physical and chemical properties different from bulk metals. They are widely used in catalysts, magnetic recording media, microelectronic devices and lubrication. Bismuth is a typical semi-metal material. Due to its properties such as highly anisotropic Fermi surface, very small electron effective mass, large carrier mean free path, and semi-metal-semiconductor transition, due to the quantum confinement effect, with With the reduction of material dimensionality, the thermoelectric performance of bismuth will be significantly improved. In addition, with the change of nanowire diameter and orientation, the electrica...

Claims

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Application Information

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IPC IPC(8): B22F9/04B22F1/00B82Y40/00
CPCB82Y40/00B22F9/04B22F1/14
Inventor 吴幸骆晨
Owner EAST CHINA NORMAL UNIVERSITY
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