Nanocomposite material with nanoparticles embedded in carbon nanotube wall and preparation method
A nanocomposite material, carbon nanotube technology, applied in nanotechnology, nanotechnology, nanotechnology and other directions for materials and surface science, can solve problems such as the inability to achieve firm bonding, achieve excellent oxygen reduction reaction catalytic performance, preparation The method is simple and the effect of excellent lithium storage capacity
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[0026] In a specific embodiment, the preparation method of the nanoparticle / carbon nanotube composite material in which the nanoparticle is embedded in the wall of the carbon nanotube tube of the present invention, the specific steps are as follows:
[0027] 1) Preparation of anodic aluminum oxide (AAO) film with controllable openings at both ends, diameter, and length. The AAO used is self-developed. The diameter of the AAO channel is controlled by adjusting the anodic oxidation voltage, the type of electrolyte, etc., and the length of the channel is controlled by the anodic oxidation time. (See Chinese invention patent, patent number ZL201110235784.2 for details);
[0028] 2) Filling of metal salt. Prepare a metal salt solution with a molar concentration of 0.01-5mol / L (preferably 0.1-1mol / L), immerse the AAO template in the metal salt solution, seal it, cool it in an ice bath, and vacuumize it for 3-10 hours Finally, the AAO template was taken out of the solution and drie...
Embodiment 1
[0033] An AAO membrane with a channel diameter of 40 nm and a length of 20 μm was immersed in FeCl with a molar concentration of 0.1 M 3In the aqueous solution, seal it, cool it in an ice bath, and vacuumize it for 5 hours, take the AAO template out of the solution, and dry it. Then rinse off the metal salt attached to the surface with deionized water, and dry at 80°C for 10 hours. The AAO template deposited with metal ions was placed in a chemical vapor deposition furnace, and the temperature was raised to 800°C under a hydrogen atmosphere, and a carbon source was introduced to conduct chemical vapor deposition of carbon. The AAO template after carbon precipitation was immersed in HF solution (concentration of 30wt% in this example) to remove the AAO template, and finally a nanoparticle / carbon nanotube composite material with nanoparticles embedded in the carbon nanotube wall was obtained.
[0034] The above samples were characterized by scanning electron microscopy, EDS, tr...
Embodiment 2
[0036] An AAO membrane with a channel diameter of 100 nm and a length of 50 μm was immersed in MnCl with a molar concentration of 0.2M 2 In the aqueous solution, seal it, cool it in an ice bath, and vacuumize it for 3 hours, take the AAO template out of the solution, and dry it. Then rinse off the metal salt attached to the surface with deionized water, and dry at 70°C for 5 hours. The AAO template deposited with metal ions was placed in a chemical vapor deposition furnace, and the temperature was raised to 600°C under a hydrogen atmosphere, and a carbon source was introduced to conduct chemical vapor deposition of carbon. The AAO template after carbon precipitation was immersed in HF solution (concentration 42wt% in this example) to remove the AAO template, and finally a nanoparticle / carbon nanotube composite material with nanoparticles embedded in the carbon nanotube wall was obtained.
[0037] The above samples were characterized by scanning electron microscope, EDS, trans...
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