Method for preparing nano copper/carbon nano tube composite powder by liquid phase method

A technology of carbon nanotube composite and carbon nanotube, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of difficult control of nano-copper particles, complicated preparation methods, and high cost, and achieve Low cost, simple process, easy to control the effect

Inactive Publication Date: 2011-09-28
HEILONGJIANG UNIV
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  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems that the existing nano-copper / carbon nanotube composite powder preparation method is complicated, the cost is high, and the nano-copper particles are difficult to control. The present invention provides a liquid phase method for preparing nano-copper / carbon nanotubes Composite powder method

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  • Method for preparing nano copper/carbon nano tube composite powder by liquid phase method
  • Method for preparing nano copper/carbon nano tube composite powder by liquid phase method

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specific Embodiment approach 1

[0016] Embodiment 1: This embodiment is a method for preparing nano-copper / carbon nanotube composite powder by liquid phase method, which is realized through the following steps: 1. Carbon nanotubes after acidification treatment and polyvinylpyrrolidone (PVP) Add copper sulfate solution, ultrasonically mix to obtain mixed solution A, then adjust the pH value of mixed solution A to 10-12, then add hydrazine hydrate solution, and mix to obtain mixed solution B, wherein the mass of carbon nanotubes after acidification treatment and sulfuric acid The ratio of copper molar weight is 1~3g: 0.1mol, the concentration of copper sulfate solution is 0.1~0.5mol / L, the quality of polyvinylpyrrolidone is 3%~10% of copper sulfate quality, the mol ratio of hydrazine hydrate and copper sulfate is 10~20:1; 2. Stir and react the mixed solution B obtained in step 1 at 60~80°C for 2~6h, then cool to room temperature, filter the reaction system to obtain powder, and then wash the powder until medium...

specific Embodiment approach 2

[0019] Specific embodiment 2: The difference between this embodiment and specific embodiment 1 is that the acidified carbon nanotubes used in step 1 are obtained through the following acidification treatment: carbon nanotubes are added with a mass concentration of 10% to 30%. In nitric acid, under the condition of 100-120°C, stir and heat to reflux for 3-5h, then cool to room temperature, wash the carbon nanotubes until the filtrate is neutral, and then vacuum-dry at 50°C for 24-48h to obtain acidified Carbon nanotubes, that is, the acidification treatment of carbon nanometers is completed. Other steps and parameters are the same as those in Embodiment 1.

[0020] In this embodiment, the carbon nanotubes may be submerged in nitric acid.

specific Embodiment approach 3

[0021] Specific embodiment three: the difference between this embodiment and specific embodiment one is that the carbon nanotubes after the acidification treatment used in step one are obtained by the following acidification treatment: the carbon nanotubes are added to nitric acid with a mass concentration of 20%, Under the condition of 110°C, stir and heat to reflux for 4 hours, then cool to room temperature, wash the carbon nanotubes until the filtrate is neutral, and then vacuum-dry them at 50°C for 24 hours to obtain carbon nanotubes after acidification treatment, that is, carbon nanotubes are completed. Acid treatment. Other steps and parameters are the same as those in Embodiment 1.

[0022] In this embodiment, the carbon nanotubes may be submerged in nitric acid.

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Abstract

The invention discloses a method for preparing a nano copper / carbon nano tube composite powder by a liquid phase method, and relates to a preparation method of nano copper / carbon nano tube composite powder. The method solves the problems that the conventional preparation method of the nano copper / carbon nano tube composite powder is complex and high in cost and the nano copper particles are difficultly controlled. The method comprises the following steps of: adding acidified carbon nano tube and polyvinyl pyrrolidone (PVP) into copper sulfate solution, regulating pH, then adding hydrazine hydrate to obtain mixed solution, reacting the mixed solution at the temperature of between 60 and 80 DEG C, cooling to room temperature, performing suction-filtration to obtain powder, and drying the powder in vacuum at the temperature of 50 DEG C to obtain the composite powder. The nano copper in the prepared composite powder is uniformly distributed on the surface of the carbon nano tube, and the nano copper and the carbon nano tube form a chemical bond. Under the alkali condition, the hydrazine hydrate is used as a reducing agent, and a large amount of nitrogen is generated at the same time of reducing copper ions, so that oxidation of the nano copper can be effectively prevented; and the size of the nano copper particles can be controlled in a range of 40 to 50 nanometers by adding the PVP. The preparation method is simple in process and low in cost, and the nano copper particles are easily controlled.

Description

technical field [0001] The invention relates to a preparation method of nano copper / carbon nano tube composite powder. Background technique [0002] Due to the large specific surface area, carbon nanotubes have a cavity structure, which can be loaded or filled to prepare new composite materials. The surface-modified carbon nanotubes can be used as a template to load metal on the surface, which can form a continuous high-strength bond between the carbon nanotubes and the metal matrix, and can be used to prepare super-strong nanocomposites. The good dispersion on the nanotubes makes this composite material have strong catalytic activity, and can be applied to nanocatalysts, nanoelectronic instruments, fuel cells and the like. [0003] To prepare nano-copper / carbon nanotube composite powder, the commonly used chemical methods include electroless plating and electrochemical deposition. The electroless plating method requires acidification-sensitization-activation of carbon nano...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00C01B31/02B82Y30/00
Inventor 赵东宇贾晓莹金政王玉凤
Owner HEILONGJIANG UNIV
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