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Carbon nanotube and metal nano-particle complexes and synthetic method thereof

A technology of metal nanoparticles and carbon nanotubes, which is applied in the field of carbon nanotubes, can solve the problems of reducing the catalytic performance of carbon nanotubes and metal nanoparticle composites, uneven metal particle size, and reducing the utilization rate of metal particles, achieving excellent Catalytic effect, uniform distribution, and excellent electrochemical properties

Inactive Publication Date: 2009-04-29
PEKING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The methods reported in existing literature and patents usually need to first use acid to carry out surface oxidation treatment of carbon nanotubes (Xing, Y.C., J.Phys.Chem.B, 2004, 108: 19255), which destroys the structure of carbon nanotubes. , reducing its electrical conductivity; and there are generally problems such as uneven size, uneven dispersion, serious agglomeration, and low loading efficiency of metal particles compounded on the surface of carbon nanotubes. Catalytic performance of particle composites
In addition, the aggregation of metal particles seriously reduces the utilization rate of metal particles, so more metal particles need to be loaded to obtain the same catalytic effect
This is obviously not conducive to the reduction of catalyst cost

Method used

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  • Carbon nanotube and metal nano-particle complexes and synthetic method thereof
  • Carbon nanotube and metal nano-particle complexes and synthetic method thereof
  • Carbon nanotube and metal nano-particle complexes and synthetic method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0031] Add 21 mg of potassium chloroplatinate to 5 ml of water, then add 10 ml of polyol, 0.1 to 1.5 g of ionic liquid, and 20 mg of carbon nanotubes, and heat to reflux temperature under vigorous stirring for 1 to 10 hours. Then the obtained mixture is subjected to centrifugation, and the obtained precipitate is washed several times, centrifuged and then naturally air-dried to obtain the final product.

[0032] Such as figure 1 Shown is the X-ray powder diffraction pattern of the composite of carbon nanotubes and platinum nanoparticles synthesized by the method described above. C in the figure represents the diffraction peak of carbon nanotubes, and Pt represents the diffraction peak of platinum nanoparticles, so the product is composed of carbon nanotubes and platinum. Such as figure 2 Shown is the high resolution electron micrograph of the above product. It can be seen from the figure that the platinum nanoparticles are evenly distributed on the surface of the carbon na...

Embodiment 2

[0035]Add 21 mg of potassium chloroplatinate and 9 mg of ruthenium chloride to 5 ml of water, then add 10 ml of polyol, 0.1 to 1.5 g of ionic liquid, and 20 mg of carbon nanotubes, and heat to reflux temperature for 1 hour under vigorous stirring to 10 hours. Then the obtained mixture is subjected to centrifugation, and the obtained precipitate is washed several times, centrifuged and then naturally air-dried to obtain the carbon nanotube and platinum-ruthenium alloy nanoparticle composite.

[0036] Such as Figure 4 Shown is a high-resolution electron microscope image of the composite of the above-mentioned carbon nanotubes and platinum-ruthenium alloy nanoparticles. It can be seen from the figure that the platinum-ruthenium alloy nanoparticles are evenly distributed on the surface of the carbon nanotubes, and no free platinum-ruthenium alloy nanoparticles are observed, and almost all the platinum-ruthenium alloy nanoparticles are selectively loaded on the carbon nanotubes ...

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Abstract

The invention discloses a composite of a carbon nanotube and metal nano-particles and a synthetic method thereof, belonging to the technical field of carbon nanotubes. The composite of the carbon nanotube and metal nano-particles is characterized in that the metal nano-particles are dispersed on the surface of the carbon nanotube, the carbon nanotube does not go through surface oxidation treatment, and the metal nano-particles which are uniformly dispersed have less than 20 percent of monodispersion coefficient. The synthetic method of the composite of the carbon nanotube and metal nano-particles comprises: the carbon nanotube, metal salts and polyalcohol are mixed and stirred at constant temperature to react, wherein, the carbon nanotube does not go through surface oxidation treatment, ionic liquid is added to the reactant, and the metal salts can be one or a plurality of salts from platinum salt, gold salt, ruthenium salt, palladium salt, rhodium salt and iridium salt. Compared with the prior art, the composite of the invention has the advantages of complete structure and unaffected conductivity of the carbon nanotube, uniform particle dispersion, relatively small size distribution and favorable electro chemical property.

Description

technical field [0001] The invention relates to a composite of carbon nanotubes and metal nanoparticles and a synthesis method of the composite, belonging to the technical field of carbon nanotubes. Background technique [0002] Due to their unique electrical, optical, optoelectronic, chemical, thermal and other properties, carbon nanotubes have been widely used in the application of nanoelectronic devices such as transistors, memories, logic devices, field emission devices, and sensors. [0003] The synthesis and application of metal nanoparticles have been studied in depth, and they have been commercialized in the fields of catalysts, biological detection, and coatings. [0004] Combining the high specific surface area of ​​carbon nanotubes, excellent electrical conductivity, strong corrosion resistance, and rich properties of metal nanoparticles, carbon nanotubes and metal nanoparticles composites have been widely used in catalysis, hydrogen storage, fuel cells, Sensors ...

Claims

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Application Information

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IPC IPC(8): C01B31/02
Inventor 褚海斌李彦王金泳封格林亮林子寅
Owner PEKING UNIV
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