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Preparation method for dendritic copper-palladium nanocrystalline alloy and product of preparation method

A palladium nano- and dendritic technology is applied in the field of preparation of copper-palladium nanocrystalline alloys, which can solve the problems of unfriendly environment, difficulty in large-scale production and high reaction temperature, and achieve the effects of cheap reagents, easy dispersion and simple operation.

Inactive Publication Date: 2016-06-01
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these methods require strict experimental conditions (high reaction temperature), solvents such as oleylamine are not friendly to the environment, and some reactions are difficult to achieve large-scale production

Method used

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  • Preparation method for dendritic copper-palladium nanocrystalline alloy and product of preparation method
  • Preparation method for dendritic copper-palladium nanocrystalline alloy and product of preparation method
  • Preparation method for dendritic copper-palladium nanocrystalline alloy and product of preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) 15mg palladium acetylacetonate (Pd(acac) 2 ), 13mg copper acetylacetonate (Cu(acac) 2 ), 100mg tungsten carbonyl and 50mg polyvinylpyrrolidone (PVP: molecular weight 29000) were dissolved in 10ml benzyl alcohol and stirred at room temperature for 1h.

[0025] (2) Transfer the reaction solution obtained in (1) to a 20ml round bottom flask, and react at 120°C for 2h.

[0026] (3) Centrifuge the product obtained in (2) at a speed of 8000-12000 rpm / min for 10 min, and remove the supernatant.

[0027] (4) ultrasonically disperse the precipitate obtained in (3) in ethanol, and store at room temperature.

[0028] figure 1 with figure 2 The transmission electron micrographs and transmission energy spectra of the dendritic copper-palladium nanocrystalline alloy synthesized in this embodiment are respectively. from figure 1 It can be seen that the dendritic nanocrystals with uniform size are obtained in this example. figure 2 is the transmission energy spectrum, fi...

Embodiment 2

[0030] (1) 7.5mg palladium acetylacetonate (Pd(acac) 2 ), 19.5mg copper acetylacetonate (Cu(acac) 2 ), 100mg tungsten carbonyl and 50mg polyvinylpyrrolidone (PVP: molecular weight 29000) were dissolved in 10ml benzyl alcohol and stirred at room temperature for 1h.

[0031] (2) Transfer the reaction solution obtained in (1) to a 20ml round bottom flask, and react at 120°C for 2h.

[0032] (3) Centrifuge the product obtained in (2) at a speed of 8000-12000 rpm / min for 10 min, and remove the supernatant.

[0033] (4) ultrasonically disperse the precipitate obtained in (3) in ethanol, and store at room temperature.

[0034] image 3 It is a transmission electron micrograph of the dendritic copper-palladium nanocrystalline alloy synthesized in this embodiment. When the copper content in the copper-palladium alloy increases, the dendritic structure of the alloy becomes more significant.

Embodiment 3

[0036] (1) 15mg palladium acetylacetonate (Pd(acac) 2 ), 13mg copper acetylacetonate (Cu(acac) 2 ), 100 mg of ascorbic acid and 50 mg of polyvinylpyrrolidone (PVP: molecular weight of 50000) were dissolved in 10 ml of benzyl alcohol and stirred at room temperature for 1 h.

[0037] (2) The reaction solution obtained in (1) was transferred to a 20ml round bottom flask, and reacted at 140°C for 2h.

[0038] (3) Centrifuge the product obtained in (2) at a speed of 8000-12000 rpm / min for 10 min, and remove the supernatant.

[0039] (4) ultrasonically disperse the precipitate obtained in (3) in ethanol, and store at room temperature.

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Abstract

The invention relates to a preparation method for a dendritic copper-palladium nanocrystalline alloy, which comprises the following steps: dissolving a palladium precursor, a copper precursor and a dispersant into a solvent, then adding a reducing agent, performing a reaction at 120-160 DEG C for 1-2 h, and performing centrifugal separation to obtain a dendritic copper-palladium nanocrystalline alloy, wherein the palladium precursor is palladium acetylacetonate, palladium acetate or palladium nitrate; and the copper precursor is copper acetylacetonate, copper chloride, copper nitrate or copper sulfate. The invention further relates to the dendritic copper-palladium nanocrystalline alloy. Dendritic nanocrystals with adjustable sizes and good dispersibility can be prepared according to the preparation method, and the preparation method is simple, has high repeatability and is low in cost.

Description

technical field [0001] The invention relates to the field of preparation of metal nanomaterials, in particular to a method for preparing a dendritic copper-palladium nanocrystal alloy and a product thereof. Background technique [0002] Due to its nanometer-scale size, nanomaterials have characteristics that macroscopic materials do not have. Effects such as size effects and quantum dot effects make them produce optical, electrical, magnetic, mechanical, mechanical and other properties different from macroscopic materials, so they can be It is widely used in the fields of light, electricity, magnetism, catalysis, energy storage and conversion, etc. [0003] Palladium-based nanomaterial is a common noble metal nanomaterial. It has important applications in heterogeneous catalytic reactions such as carbon monoxide, petroleum cracking, formic acid oxidation, organic synthesis, and automobile exhaust degradation. It is a common nanocatalyst. The composition, morphology and stru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y40/00
CPCB82Y40/00B22F9/24B22F1/07
Inventor 张辉叶文莹颜聿聪杨德仁
Owner ZHEJIANG UNIV
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