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A dendritic two-dimensional palladium-silver nanosheet and preparation method thereof

A technology of dendrites and nanosheets, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of low particle size uniformity, difficulty in controlling the synthesis method of water-air interface, and insufficient catalytic performance. Make full use of problems such as the binary synergy of multi-element nanocrystalline catalysts to achieve the effects of mild experimental conditions, excellent photothermal conversion performance, and excellent electrocatalytic performance

Active Publication Date: 2019-01-08
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese invention patent CN 104551009 B discloses a method for preparing two-dimensional dendritic silver nanosheets; Zheng et al. synthesized two-dimensional fractal gold nanosheets (Crystal Growth&Design, ( 2010). 10, 4701–4705), but the disadvantages of the prior art are: (1) the synthesis method of water-air interface is relatively difficult to control, and the particle size uniformity is not high; (2) the particle composition is single element, cannot exert the binary synergistic effect of multi-element nanocrystal catalysts in terms of catalytic performance

Method used

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  • A dendritic two-dimensional palladium-silver nanosheet and preparation method thereof
  • A dendritic two-dimensional palladium-silver nanosheet and preparation method thereof
  • A dendritic two-dimensional palladium-silver nanosheet and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0022] Add 40 mg of cetyltrimethylammonium chloride and 10 mL of water into a 25 mL round bottom flask, mix well, add 200 uL of silver acetate solution and chloropalladium acid solution with a concentration of 10 mM, and ultrasonically Process for 10 min. Under the condition of water bath at 30 ℃, stir and add 400 uL of trisodium citrate solution with a concentration of 100 mM, and stir for 4 hours to obtain a solution of dendritic palladium-silver nanosheet particles. For the transmission electron microscope picture, see the attached figure 1 , the particle diameter is about 60 nm, and the particle shape is dendritic.

[0023] See attached figure 2 , is the atomic force microscopy analysis of the nanosheets prepared in this example, wherein, the figure a is the scanning picture of the atomic force microscope, and the figure b is the thickness of the corresponding tangent section in the figure a.

Embodiment 2

[0025] Add 60 mg of cetyltrimethylammonium chloride and 10 mL of water into a 25 mL round bottom flask, mix well, add 300 uL of 10 mM silver acetate solution and chloropalladium acid solution, and ultrasonically Process for 10 min. Under the condition of a water bath at 35°C, 400 uL of 100 mM trisodium citrate solution was added with stirring, and stirred for 4 hours to obtain a dendritic palladium-silver nanosheet particle solution.

Embodiment 3

[0027] Add 40 mg of cetyltrimethylammonium chloride and 10 mL of water into a 25 mL round bottom flask, mix well, add 300 uL of silver nitrate solution and chloropalladium acid solution with a concentration of 10 mM, and ultrasonically Process for 10 min. Under the condition of a water bath at 30°C, 400 uL of 100 mM trisodium citrate solution was added with stirring, and stirred for 4 hours to obtain a dendritic palladium-silver nanosheet particle solution.

[0028] Carry out X-ray energy spectrum analysis to the nanoplate that present embodiment prepares, the result sees attached image 3 .

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Abstract

The invention discloses a preparation method of a two-dimensional dendritic palladium-silver nanosheet. A palladium precursor, a silver precursor, a surfactant and a reducing agent are dispersed in a solvent for reaction, and a two-dimensional dendritic palladium-silver is prepared. Nanosheets. The preparation method of the present invention is directly prepared by a one-pot method, and has simple experimental operation, mild reaction conditions and high repeatability. The invention also discloses two-dimensional dendritic palladium-silver nanosheets prepared by the method; the particles are composed of palladium-silver alloy; the particles extend from the center to the edge, presenting a dendritic shape; the palladium-silver alloy nanosheets have two-dimensional morphology and The dendritic structure increases the specific surface area of ​​the material and the exposed atoms on the surface, which is beneficial to the catalytic performance of the nanocrystal.

Description

technical field [0001] The invention relates to a noble metal nanomaterial and a preparation method thereof, in particular to a two-dimensional dendritic palladium silver nanosheet and a preparation method thereof, belonging to the technical field of noble metal nanomaterials. Background technique [0002] In the fields of electricity, optics, heat, catalysis, etc., noble metal nanomaterials exhibit excellent and unique properties, so they have received extensive attention and in-depth research. The physical and chemical properties of nanosheets are related to their size and shape. The asymmetric structure and high specific surface area of ​​two-dimensional dendritic palladium-silver nanosheets make them exhibit excellent properties in infrared hyperthermia, catalysis, and many other aspects. , medical, biosensing and other fields have broad application prospects. [0003] Compared with other kinds of noble metal nanosheets, palladium or silver nanocrystals are important no...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/0551B22F1/054
Inventor 程丝康小林
Owner SUZHOU UNIV
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