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A kind of sub-2nm ruthenium (ru) nanowire network and preparation method thereof

A nanowire and network technology, applied in the field of ruthenium nanowire network and its synthesis, can solve the problems of immature control technology of Ru nanocrystal shape, and achieve the effect of novel structure, uniform shape and high yield

Inactive Publication Date: 2018-07-06
GUIZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with other Pt group metals, such as Pd, Pt, Rh, etc., the shape control technology of Ru nanocrystals is not yet mature, and only the synthesis method of spherical Ru nanoparticles in organic media has been reported.

Method used

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  • A kind of sub-2nm ruthenium (ru) nanowire network and preparation method thereof
  • A kind of sub-2nm ruthenium (ru) nanowire network and preparation method thereof
  • A kind of sub-2nm ruthenium (ru) nanowire network and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) Surfactant and reducing agent are added in the aqueous solution at a mass ratio of 1:1, stirred for 5 minutes;

[0021] (2) adding concentration to step (1) gained mixed solution (7ml) is the ruthenium trichloride solution of 0.1mol / L, stirs at room temperature 1 minute; The solution color after mixing is dark red;

[0022] (3) Transfer the mixed solution obtained in step (2) to an autoclave to react for 15 hours, and the temperature is controlled at 180° C.;

[0023] (4) The product obtained in step (3) is cooled, centrifuged, washed three times with deionized water, and then dispersed and stored in ethanol solution. The product was a mixture of worm-like nanowires and a few small particles, and the nanowires began to branch.

Embodiment 2

[0025] (1) Surfactant and reducing agent are added in the aqueous solution at a mass ratio of 1:2, and stirred for 3 minutes;

[0026] (2) adding concentration to step (1) gained mixed solution (7ml) is the ruthenium trichloride solution of 0.1mol / L, stirs at room temperature 2 minutes; The solution color after mixing is dark red;

[0027] (3) Transfer the mixed solution obtained in step (2) to an autoclave to react for 18 hours, and the temperature is controlled at 180° C.;

[0028] (4) The product obtained in step (3) is cooled, centrifuged, washed three times with deionized water, and then dispersed and stored in ethanol solution. The products are longer and more branched nanowires and partial nanowire networks.

Embodiment 3

[0030] (1) Surfactant and reducing agent are added in the aqueous solution at a mass ratio of 2:1, stirred for 4 minutes;

[0031] (2) adding concentration to step (1) gained mixed solution (7ml) is the ruthenium trichloride solution of 0.1mol / L, stirs at room temperature 3 minutes; The solution color after mixing is dark red;

[0032] (3) Transfer the mixed solution obtained in step (2) to an autoclave to react for 24 hours, and the temperature is controlled at 180°C;

[0033] (4) The product obtained in step (3) is cooled, centrifuged, washed three times with deionized water, and then dispersed and stored in ethanol solution. The result is a nanowire network of longer and more branched nanowires.

[0034] figure 1 .It is the observation result figure of sub-2nm ruthenium (Ru) nanowires with a transmission electron microscope. It can be seen that the product is a network of interconnected ultra-fine nanowires.

[0035] figure 2 .It is the observation result map of sub-2...

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Abstract

The invention discloses a sub-2nm ruthenium (Ru) nanowire network and a synthesis method thereof. The mass ratio to the reducing agent is 1:2 to 2:1; the amount of water added needs to completely dissolve the surfactant and the reducing agent; (2) Add the metal ruthenium salt precursor solution to the mixed solution obtained in step (1) , the ratio of the added water to the ruthenium precursor solution is 5:1~10:1; the concentration of the ruthenium metal precursor is 0.05~0.5mol / L; stir at room temperature for 1~3 minutes; (3) the step (2) obtained Transfer the mixed solution to an autoclave to react for 12-30 hours, the temperature is controlled at 150-200°C; (4) Wash the product obtained in step (3) after cooling, and obtain a sub-2nm Ru nanowire after centrifugation network.

Description

technical field [0001] The invention relates to a ruthenium (Ru) nanowire network with a diameter less than 2nm and a synthesis method thereof. Background technique [0002] As an important element in Pt group metals, Ru plays an irreplaceable role in the oxidation of alcohols, nitrogen fixation, biomass fuels and liquid fuel cells. The intrinsic link between structure and performance determines the importance of controlling the size and shape of metal nanocrystals. Compared with other Pt group metals, such as Pd, Pt, Rh, etc., the shape control technology of Ru nanocrystals is not yet mature, and the only reported method is to synthesize spherical Ru nanoparticles in organic media. [0003] In recent years, one-dimensional nanowires have attracted widespread attention from the scientific community due to their unique structures and properties. However, the nanowires synthesized in the solution system are often relatively large in diameter (> 5nm), and the sub-2nm nanow...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00B22F9/24B22F1/0553B22F1/054
Inventor 袁强赵伟悦
Owner GUIZHOU UNIV
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