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Quintuplet twinned gold and gold-silver alloy particles and preparation method thereof

A five-twinned, gold-silver alloy technology, applied in the field of five-twinned gold and gold-silver alloy particles and their preparation, to achieve uniform gold and silver distribution, smooth shape, and small size

Inactive Publication Date: 2015-12-02
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, five-twinned gold nanoparticles surrounded by {110} facets have never been reported.

Method used

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  • Quintuplet twinned gold and gold-silver alloy particles and preparation method thereof
  • Quintuplet twinned gold and gold-silver alloy particles and preparation method thereof
  • Quintuplet twinned gold and gold-silver alloy particles and preparation method thereof

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preparation example Construction

[0024] On the one hand, the present invention provides a kind of preparation method of the decahedral gold-silver alloy grain of pentagonal twin, described method comprises: chloroauric acid, silver nitrate, polyvinylpyrrolidone, water in N,N-dimethyl Mix well in formamide, the molar ratio of chloroauric acid, silver nitrate, polyvinylpyrrolidone, water and N,N-dimethylformamide is 1:0.5-1.5:2.9-3.7:2200-5600:12900-25900, And under the condition of stirring, the obtained mixed solution was reacted at 110-130°C for 0.5-1.5h.

[0025] In the present invention, there is no special requirement for the adding form and adding order of chloroauric acid, silver nitrate, polyvinylpyrrolidone, water, as long as chloroauric acid, silver nitrate, polyvinylpyrrolidone, water and N,N-dimethyl formaldehyde The molar ratio of amides is 1:0.5-1.5:2.9-3.7:2200-5600:12900-25900.

[0026] In the present invention, various stirring devices commonly used in the art can be used for stirring. In ord...

Embodiment 1

[0073] This example is used to illustrate the preparation of the five-fold twinned decahedral gold-silver alloy particles of the present invention.

[0074] In this example:

[0075] Scanning electron microscope image, transmission electron microscope image, silver atomic number Z-contrast imaging and gold atomic number Z-contrast imaging of the prepared product: centrifuge the prepared product at 50000rpm for 20min, remove the supernatant The final centrifuged product was dispersed in 5ml of ultrapure water, and 5μl was dropped on the ultra-thin carbon film copper grid, and was observed and imaged with a TecnaiG2F20U-TWIN field emission transmission electron microscope (purchased from FEI, USA, the same below). Silver atomic number Z-contrast imaging and gold atomic number Z-contrast imaging are observed and imaged using the accessory function of atomic number Z-contrast imaging (STEM-HAADF) of TecnaiG2F20U-TWIN field emission transmission electron microscope.

[0076] The d...

Embodiment 11

[0078] Mix chloroauric acid, silver nitrate, polyvinylpyrrolidone, and water in N,N-dimethylformamide evenly, and the chloroauric acid, silver nitrate, polyvinylpyrrolidone, water and N,N-dimethylformamide The molar ratio is 1:1:3.3:3900:19120, magnetic stirring is used, the stirring speed is 700rpm, and the obtained mixed solution is reacted at 120°C for 1h. The scanning electron microscope image of the obtained product is shown in figure 1 a. figure 1 b, Transmission electron microscope image see figure 1 c, silver atomic number Z-contrast imaging see figure 1 d, Gold atomic number Z-contrast imaging see figure 1 e. The product particles are 5-6 nm in diameter.

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Abstract

The invention discloses a preparation method of five-twin-crystal decanedron gold-silver alloy particles comprising chloroauric acid, silver nitrate, polyvinylpyrrolidone, water and N, N-dimethylformamide, and the five-twin-crystal decanedron gold-silver alloy particles prepared through the preparation method. The invention further discloses a preparation method of five-twin-crystal gold particles comprising chloroauric acid, the five-twin-crystal decanedron gold particles, polyvinylpyrrolidone, water and N, N-dimethylformamide, and also discloses the five-twin-crystal gold particles with the shape similar to spheroids, the pentagon dodecahedral five-twin-crystal gold particles with all crystal faces being {110} crystal faces, the pentagon-star five-twin-crystal gold particles with a part of crystal faces being {110} crystal faces, and the chamfered-decanedron five-twin-crystal gold particles with a part of crystal faces being {110} crystal faces, wherein all the five-twin-crystal gold particles are prepared through the preparation method. According to the five-twin-crystal gold-silver alloy particles, the preparation method of the five-twin-crystal gold-silver alloy particles, the five-twin-crystal gold particles and the preparation method of five-twin-crystal gold particles, the five-twin-crystal structure and the high-energy {110} crystal faces are combined for the first time, so that the five-twin-crystal gold particles have more physicochemical properties determined by shapes and forms.

Description

technical field [0001] The present invention relates to quintuple twinned gold-silver alloy particles and a preparation method thereof, as well as quintuple twinned gold particles and a preparation method thereof, in particular to quintuple twinned decahedral gold-silver alloy particles and a preparation method thereof, ellipsoid-like Quintuplet twinned gold particles and preparation method thereof, all crystal planes are pentagonal dodecahedral fivefold twinned gold particles of {110} crystal planes and preparation method thereof, part of crystal planes are {110} crystal planes The five-fold twinned gold particles of the pentagonal star and the preparation method thereof, the five-twinned gold particles of the truncated decahedron whose crystal faces are partly {110} crystal planes, and the preparation method thereof. Background technique [0002] Gold nanoparticles have good optical and optoelectronic properties. They have very important application value in catalysis, bi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/00
Inventor 江鹏刘腾蛟酉琪
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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