The invention discloses a method for synthesis of a cobalt nanoparticle and bamboo-like nitrogen doped carbon nanotube composite material. The method includes: dissolving a soluble cobalt salt and an amine polymer in a hydrophilic reagent according to a mole ratio of 1:(2-200), performing evaporation at 60DEG C, conducting grinding after cooling, performing calcination at 400-1400DEG C under nitrogen atmosphere, then treating the sample with acid, and carrying out washing, centrifugation and drying so as to obtain the cobalt nanoparticle and bamboo-like nitrogen doped carbon nanotube composite material. The obtained cobalt nanoparticles have small particle size and are employed to coat the head of a carbon nanotube evenly so as to combine tightly with the carbon nanotube. The composite material has application prospects in fuel cell anode materials, lithium ion battery cathode materials and the like. The method designed by the invention has the advantages of easily available raw materials, simple process and no pollution, short preparation period, mild reaction conditions, low cost, and mass synthesis capability, etc.

Method for synthesis of cobalt nanoparticle and bamboo-like nitrogen doped carbon nanotube composite material

The invention discloses a spherical nitrogen-doped carbon-supported non-noble metal oxygen reduction catalyst and a preparation method thereof, and aims to provide a nitrogen-doped non-noble metal oxygen reduction catalyst which has the advantages of simplicity, convenience, practicability, low cost and stable performance and a preparation method thereof. The technical key points are as follows: the catalyst comprises the following components: melamine formaldehyde resin prepolymer, non-noble metal salt and acid. The preparation method of the catalyst comprises the following steps of: (1) uniformly mixing the melamine formaldehyde resin prepolymer with pure water; (2) adding the non-noble metal salt and stirring; (3) adding the acid into the solution obtained by the step (2), curing and drying to obtain blocks; and (4) performing thermal treatment to obtain the spherical nitrogen-doped carbon-supported non-noble metal oxygen reduction catalyst. The invention belongs to the technical field of fuel cell material science.

Spherical nitrogen-doped carbon-supported non-noble metal oxygen reduction catalyst and preparation method thereof

The invention provides a method for preparing a nitrogen-doped carbon nanotube fuel cell catalyst, aiming at the problems existing in the preparation methods of the existing nitrogen-doped carbon nanotubes In the method, a double-temperature area method is adopted to prepare a nitrogen-doped carbon nanotube, firstly a solid carbon source and nitrogen source precursor is put in a low-temperature area to be heated to be sublimated and then the sublimated precursor is brought into a high-temperature area by carrier gas to deposit the carbon nanotube; corrosion of gas inlet pipelines and equipment interfaces can be effectively avoided by putting the precursor in the low-temperature area; and meanwhile the flow velocity of the carrier gas is lower, so the precursor can fully react in the high-temperature area, thus improving the yield of the nitrogen-doped carbon nanotube The method is simple and practicable, is safe to operate and has low production cost The nitrogen-doped carbon nanotube catalyst prepared by the method can be applied in the field of fuel cells The catalyst prepared by the method has efficient oxygen reduction catalytic property and potential in comparing favourably with and replacing the Pt/C catalyst

Method for preparing nitrogen-doped carbon nanotube fuel cell catalyst

The invention relates to nitrogen-doped carbon nanotubes (NCNT), the surface of which is charged with metal nanoparticles, and to a method for the production thereof and use thereof as a catalyst.

Nitrogen doped carbon nanotubes with metal nanoparticles

Concrete reinforced with nanostructures, comprising cement and a dispersion including water, a surfactant, carbon nanotubes having on the external surfaces thereof carbon atoms substituted by atoms of another element, and carbon nanotubes possessing chemical groups on the surface thereof

Concrete reinforced with hybrid nanomaterials

The present invention relates to high nitrogen doped corrugated carbon nanotube material and its synthesis process. The synthesis process includes the following steps: mixing Fe source and proper amount of distilled water, soaking porous molecular sieve to carry ferric oxide or ferrous oxide, stoving and roasting at 300-1000 deg.c for 0.5-24 hr to obtain catalyst; setting the catalyst inside a pipe furnace, leading organic amine into the furnace under the protection of Ar or N2 and reacting at 650-1000 deg.c for 0.2-4.0 hr to obtain high nitrogen doped corrugated carbon nanotube mixture containing the catalyst; soaking the mixture in proper amount of or excessive hydrofluoric acid, sulfuric acid, nitric acid or acid for 0.5-24 hr; and washing in distilled water, suction filtering and drying to obtain high nitrogen doped corrugated carbon nanotube material. The material has nitrogen content of 10-40 %, reinforced surface polarity, etc, and is suitable for industrial production.

Wang Lijun

Papers

High nitrogen doped corrugated carbon nanotube material and its synthesis process