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Preparation method and application of two-dimensional multi-element metallic nano material

A technology of multiple metals and nanomaterials, applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., to achieve the effects of controllable size, adjustable components, and high yield

Inactive Publication Date: 2019-05-17
HUAQIAO UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although metal thin films several atomic layers thick have been prepared by physical deposition (C.T. Campbell, Surf. Sci. Rep. 1997, 27, 1.), the synthesis of two-dimensional ultrathin noble metal nanoparticles based on non-substrate growth and chemical methods Materials remain a challenge

Method used

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  • Preparation method and application of two-dimensional multi-element metallic nano material
  • Preparation method and application of two-dimensional multi-element metallic nano material
  • Preparation method and application of two-dimensional multi-element metallic nano material

Examples

Experimental program
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Effect test

Embodiment 1

[0034] 1) In a 25 ml reaction flask, add 90 mg citric acid, 20 mg potassium bromide, 30 mg polyvinylpyrrolidone, 16 mg palladium acetylacetonate, 8 mg platinum acetylacetonate, 5 mg copper acetylacetonate, and 10 ml N-N dimethylformamide at room temperature Stir for 1h;

[0035] 2) Add 25mg of molybdenum hexacarbonyl, put it in an oil bath at 80°C for 3h, then naturally raise the temperature to 150°C and keep it for 3h. After the reaction is finished, cool down to room temperature naturally, wash and centrifuge several times with a mixture of ethanol and acetone for later use, and obtain a two-dimensional Ultrathin palladium-platinum-copper ternary alloy nanorings.

[0036] The morphology, composition, and microstructure of the product are systematically studied by modern nanometer testing and analysis techniques such as TEM, HAADF-STEM, and XRD. TEM( figure 1 a, b) The characterized product is an ultra-thin two-dimensional hexagonal ring structure with 100% purity, the side...

Embodiment 2

[0038] 1) In a 25 ml reaction flask, add 90 mg citric acid, 20 mg potassium bromide, 30 mg polyvinylpyrrolidone, 16 mg palladium acetylacetonate, 8 mg platinum acetylacetonate, 5 mg copper acetylacetonate, and 10 ml N-N dimethylformamide at room temperature Stir for 1h;

[0039] 2) Add 75mg of molybdenum hexacarbonyl, put it in an oil bath at 80°C for 3h, then naturally raise the temperature to 150°C and keep it for 3h, after the reaction is finished, cool down to room temperature naturally, wash and centrifuge several times with a mixture of ethanol and acetone to obtain a two-dimensional super Thin palladium-platinum-copper ternary alloy nanosheets.

[0040] The morphology, composition, and microstructure of the product are systematically studied by modern nanometer testing and analysis techniques such as TEM, HAADF-STEM, and XRD. TEM, HAADF-STEM ( Figure 4 a, b) The characterized product is an ultra-thin two-dimensional hexagonal sheet structure with 100% purity, the hex...

Embodiment 3

[0042] 1) In a 25 ml reaction flask, add 90 mg of citric acid, 20 mg of potassium bromide, 30 mg of polyvinylpyrrolidone, 16 mg of palladium acetylacetonate, 8 mg of platinum acetylacetonate, and 10 ml of N-N dimethylformamide, and stir at room temperature for 1 hour;

[0043] 2) Add 75 mg of molybdenum hexacarbonyl, put it in an oil bath at 80°C for 3 hours, then raise the temperature to 150°C and keep it for 3 hours. After the reaction, cool down to room temperature naturally, wash and centrifuge with a mixture of ethanol and acetone for several times to obtain a two-dimensional ultrathin film. Palladium-platinum binary alloy nanosheets, high-angle annular dark-field scanning transmission electron microscopy (HAADF-STEM), energy spectrum analysis surface scanning (EDS) ( Figure 7 ) characterized it as a high-yield ultrathin palladium-platinum bimetallic two-dimensional sheet structure, further confirming the two-component characteristics of the material.

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Abstract

The invention discloses a preparation method and application of a two-dimensional multi-element metallic nano material. The preparation method comprises the steps that palladium acetylacetonate, bisplatinum, selectable soluble metal salt, a structure regulating agent, polyvinylpyrrolidone and N-N dimethyl formamide are mixed and stirred for 30-120 minutes at room temperature, then molybdenum hexacarbonyl is added to react with the mixture for 1-3 hours at the temperature of 60-80 DEG C, the temperature is increased to be 120-150 DEG C, reaction is conducted for 1-24 hours, the product is naturally cooled to be at room temperature, and then sufficiently washed with the mixture of ethyl alcohol and acetone, and the two-dimensional multi-element metallic nano material is obtained. The two-dimensional multi-element metallic nano material is synthesized through a one-step method, and the two-dimensional ultrathin multi-metal nano electrocatalyst with the size being controllable and the morphology being regular is prepared by regulating reaction kinetics to control different metal nucleation and growth speed and sequence.

Description

technical field [0001] The invention belongs to the technical field of preparation of catalytic materials, and in particular relates to a preparation method and application of a two-dimensional multi-element metal nanomaterial. Background technique [0002] Two-dimensional (2D) nanomaterials have Because of its unique physical and chemical properties, it has become the focus of researchers. As a class of 2D nanomaterials, ultrathin two-dimensional noble metal nanosheets are widely used in catalysis, biomedicine, electronic devices, etc. field. Although metal thin films several atomic layers thick have been prepared by physical deposition (C.T. Campbell, Surf. Sci. Rep. 1997, 27, 1.), the synthesis of two-dimensional ultrathin noble metal nanoparticles based on non-substrate growth and chemical methods Materials remain a challenge. This is mainly due to the fact that noble metal atoms tend to form a stable, close-packed three-dimensional structure. At present, some relev...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/89B82Y30/00B82Y40/00
Inventor 谢水奋王伟张玉辉韩艳晨
Owner HUAQIAO UNIVERSITY
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