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Method for preparing metal bismuth nanoparticle

A bismuth nanometer and metal technology is applied in the field of preparation of metal bismuth nanoparticles, which can solve the problems of no bismuth nanoparticles and high production cost, and achieve the effects of low cost, cheap raw materials and high yield.

Active Publication Date: 2009-11-04
江苏荣和久能源科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The reported preparation methods of metal bismuth nanoparticles include liquid phase dispersion method, chemical reduction method, etc. Although these methods have produced dispersible metal bismuth nanoparticles, they have the disadvantage of high production cost when applied to industrial production.
[0004] Although the method of in situ surface modification has been widely used in the preparation of various nanoparticles, so far there has been no relevant report on the preparation of bismuth nanoparticles by this method.

Method used

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  • Method for preparing metal bismuth nanoparticle
  • Method for preparing metal bismuth nanoparticle
  • Method for preparing metal bismuth nanoparticle

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Weigh 0.243g bismuth nitrate pentahydrate, dissolve in 10mL distilled water, add 0.73gC 22 10ml of petroleum ether solution of DDP, at room temperature (20°C), stir for 10min to mix evenly, then slowly add 10mL of hydrazine monohydrate solution containing 1.2mol / L dropwise, the dropping rate is about 1mL / min, the temperature is controlled at 50°C, at 1350r Stir and reflux reaction at a speed of 1 / min for 1 h, let stand to separate layers, discard the lower layer, take the upper black organic phase, distill under reduced pressure (60 ° C, vacuum degree 0.05Mpa, 30 min), add acetone to wash centrifugally, and dry to obtain a black powder. That is metal bismuth nanoparticles, the actual yield is about 91.5% of the theoretical value; figure 1 As shown, it can be seen that the shape of the prepared nanoparticles is approximately cubic, the surface has a layer of organic coating, and the particle size is relatively uniform, between 50 and 100nm; the X-ray diffraction pattern ...

Embodiment 2

[0033] Weigh 0.388g bismuth nitrate pentahydrate, dissolve in 10mL distilled water, add 0.899gC 16 Chloroform solution 10ml of DDP, room temperature (20 ℃), stir 40min to mix evenly, then slowly dropwise add 10mL of the mixed clear solution containing 0.226g tin protochloride dihydrate and 0.8g sodium hydroxide, the rate of addition is about 1mL / min, Control the temperature at 65°C, stir and reflux at a speed of 1500r / min for 2.5h, let stand to separate layers, remove the lower black organic phase, distill under reduced pressure (70°C, vacuum degree 0.07Mpa, 25min), add acetone, centrifuge, wash, and dry , to obtain black powder, which is metal bismuth nanoparticles, and the actual yield is about 91.5% of the theoretical value; figure 2 As shown, it can be seen that the prepared nanoparticles have a cubic structure, and the particle size distribution is relatively uniform, ranging from 50 to 80 nm; the obtained black powder is dispersed in petroleum ether, and no obvious prec...

Embodiment 3

[0035] Weigh 0.212g anhydrous bismuth sulfate, dissolve in 10mL distilled water, add 0.9g C 12 10ml of n-hexane solution of DDP, at room temperature (20°C), stir for 15min to mix well, then slowly add 10mL of the mixed clear solution containing 0.677g of stannous chloride dihydrate and 1.2g of sodium hydroxide dropwise at a rate of about 1mL / min , the temperature was controlled at 60°C, stirred and refluxed at a speed of 1650r / min for 2h, allowed to stand for stratification, and the upper black organic phase was taken, distilled under reduced pressure (65°C, vacuum degree 0.06Mpa, 28min), added acetone for centrifugal washing, and dried Obtain black powder, be metal bismuth nanoparticle, actual productive rate is about 88.4% of theoretical value; Transmission electron microscope picture is as image 3 As shown, it can be seen that the shape of the obtained nanoparticles is mainly cubic, and the particle size distribution is relatively wide, between 50-120nm; the obtained black...

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Abstract

The invention belongs to the technical field of nanometer material, and discloses a method for preparing a metal bismuth nanoparticle. The method comprises the following steps: mixing soluble bismuth salt aqueous solution and modifying agent organic solution; adding reducing agent into the mixture to be stirred, heated and refluxed; keeping the mixture still until layered; taking the black organic phase layer; and removing the organic solvent to obtain black powder, namely the metal bismuth nanoparticle. The preparation method of the invention has low cost and accessible raw materials, simple and convenient process, low cost and higher yield, and is applicable to large-scale industrial production. The metal bismuth nanoparticle prepared by the method has uniform size without obvious hard aggregation phenomenon, can be stably dispersed in a plurality of organic media for long time.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials, in particular to a preparation method of metal bismuth nanoparticles. Background technique [0002] Bismuth is friendly to the natural environment and harmless to the human body. As a "green metal" that can be used safely, it is not only used in the pharmaceutical industry, but also widely used in semiconductors, superconductors, flame retardants, pigments, cosmetics, chemical reagents, electronic ceramics, etc. It has the potential to replace toxic heavy metal elements such as lead, antimony, cadmium and mercury. [0003] Metal bismuth nanoparticles have low hardness, low melting point, good wear reduction, wear resistance and self-repair performance, and are an excellent wear reduction and repair additive. The reported preparation methods of metal bismuth nanoparticles include liquid phase dispersion method, chemical reduction method, etc. Although these methods have produced dispe...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 张晟卯吕富山姬二卫吴志申张治军
Owner 江苏荣和久能源科技有限公司
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