162 results about "Carbon Nanohorn" patented technology

(Problem)

In conventional method for producing artificial graphite, in order to obtain a product having excellent crystallinity, it was necessary to mold a filler and a binder and then repeat impregnation, carbonization and graphitization, and since carbonization and graphitization proceeded by a solid phase reaction, a period of time of as long as 2 to 3 months was required for the production and cost was high and further, a large size structure in the shape of column and cylinder could not be produced. In addition, nanocarbon materials such as carbon nanotube, carbon nanofiber and carbon nanohorn could not be produced.

(Means to Solve)

A properly pre-baked filler is sealed in a graphite vessel and is subsequently subjected to hot isostatic pressing (HIP) treatment, thereby allowing gases such as hydrocarbon and hydrogen to be generated from the filler and precipitating vapor-phase-grown graphite around and inside the filler using the generated gases as a source material, and thereby, an integrated structure of carbide of the filler and the vapor-phase-grown graphite is produced. In addition, nanocarbon materials are produced selectively and efficiently by adding a catalyst or adjusting the HIP treating temperature.

A sheet-like article including fibers and carbon nanotubes and/or carbon nanohorns adhering to the surface of the fibers in a uniformly dispersed state without agglomeration to form a network structure on the fibers. The sheet-like article is preferably made by converting the fibers and a dispersion of the carbon nanotubes and/or carbon nanohorns by a wet papermaking process. To use cellulose fibers as main fibers provides a good sheet-like article.

The invention provides a method for preparing carbon nanohorn, belonging to the technical field of carbon nanohorn synthesis. The carbon nanohorn is prepared by the DC (direct current) arc method in the reaction atmosphere of air, CO2, CO or a gas mixture of CO/N2. The method of the invention meets the requirements for mass production and has the advantages of simple equipment and low preparation cost; moreover, the product of the method has high purity, particularly, the purity of the carbon nanahorn simply subjected to ignition and purification is higher than 94%; and the diameter of the carbon nanohorn prepared by the method of the invention is approximately 25 nanometers, and the carbon nanohorn can be aggregated into a spherical aggregate with the diameter of 50 to 80 nanometers.

An apparatus and method of providing an apparatus, the apparatus including: a loudspeaker configured to convert an electrical input signal into an acoustic output signal; and carbon nanohorn material wherein the carbon nanohorn material is positioned so as to be exposed to the acoustic output signal.

A novel carbon nanohorn adsorbent which does not necessitate a high-temperature treatments lightweight and chemically stable, and can selectively adsorb molecules based on the molecular sieve effect; and a process for producing the adsorbent. The process comprises oxidizing a single-wall carbon nanohorn aggregate while controlling oxidative conditions to thereby obtain the carbon nanohorn adsorbent, which have, in the tubular parts, pores having a regulated diameter.

The invention belongs to the field of a new energy material, and relates to a nickel-cobalt double hydroxide/nitrogenous carbon nanohorn composite material used for a supercapacitor and a preparation method for the composite material. The composite material is prepared from the nickel-cobalt double hydroxide and the nitrogenous carbon nanohorn in a compounding manner; the preparation process comprises the steps of preparing the nitrogenous carbon nanohorn firstly by adopting a hydrogen arc method; then preparing a mixed solvent of water and ethanol, adding nickel nitrate and cobalt nitrate to the mixed solvent, adding urea to be used as an alkali source, and carrying out uniform ultrasonic dispersion to obtain a dual-metal-salt solution; and finally, adding the nitrogenous carbon nanohorn to the dual-metal-salt solution, carrying out uniform ultrasonic dispersion and then implementing a microwave hydrothermal reaction, and next, carrying out suction filtration, washing, drying and grinding on the prepared precipitates to obtain the nickel-cobalt double hydroxide/nitrogenous carbon nanohorn composite material.

An apparatus and method of providing an apparatus, the apparatus including a loudspeaker configured to convert an electrical input signal into an acoustic output signal; and carbon nanohorn material wherein the carbon nanohorn material is positioned so as to be exposed to the acoustic output signal.

The invention provides a method for preparing a carbon nanohorn with an electric arc method. Graphite rods are taken as an anode and a cathode of the carbon nanohorn, the anode and the cathode are placed oppositely, direct-current electric arc discharge is performed under the high-current and compressed air atmosphere, the graphite rods are continuously consumed in the direct-current electric arc discharge process, the distance between the anode and the cathode is kept 1-3 nm, and the carbon nanohorn is prepared. The scan and transmission electron microscopy representation of the prepared carbon nanohorn proves that a carbon nanohorn product has high purity and has the diameter of 2-5 nm, and spherical aggregate with a diameter of 80-100 nm is aggregated.

An electric double-layer capacitor includes a carbon composite electrode which serves as a polarizing electrode and made of a single-layer carbon nanohorn aggregate having a specific structure and a very large surface area. The single carbon nanohorn aggregate is mixed with a phenol resin, the mixture is formed and heated to produce a carbon composite electrode. The carbon composite electrode is impregnated with an electrolyte to become a polarizing electrode. An electric double-layer capacitor includes this polarizing electrode has a large capacitance and is capable of discharging with large current.

An object of the present invention is to provide a nanotube-nanohorn complex having a high aspect ratio, also having high dispersibility, having controlled diameter, and having high durability at a low cost. According to the present invention, a carbon target containing a catalyst is evaporated with a laser ablation method to synthesize a structure including both of a carbon nanohorn aggregate and a carbon nanotube.

The disclosure relates to a material for reversibly storing and releasing hydrogen comprising graphite or a graphitic structure, for example, comprising an ordered graphite structure of carbon and nitrogen atoms wherein the interlayer and/or interstitial volume is occupied with at least one intercalated anionic species. While any suitable anionic species can be employed, examples of suitable species are at least one of: F⁻ (fluoride), (C≡C)²⁻ (diacetylide), and (N═C═N)²⁻. Desirable anionic species typically have a relatively high charge to volume ratio. The disclosure also relates to a material for reversibly storing and releasing hydrogen comprising ordered graphitic structures comprising at least one member selected from the group of graphite, single walled carbon nanotubes, multiwalled carbon nanotubes, graphite nanofibers, carbon nanohorns, and boron nitride. The carbon materials may incorporate substitutional nitrogen atoms in the graphite lattice at a level ranging from about 1 to about 40 atomic percent.

The invention discloses a platinum/carbon-based nano composite material, and a preparation method and application thereof. The preparation method comprises the following steps: with radiation of gamma rays or electron beams, inducing reduction of a platinum metal precursor, and simultaneously, carrying out irradiating modification on single-wall carbon nanohorn or a mixed carbon material of single-wall carbon nanohorn and oxidized graphite, thereby obtaining the platinum/carbon-based nano composite material with the platinum loading amount being 0.5wt%-50wt%. The platinum/carbon-based nano composite material can be used as an electric catalyst of a proton exchange membrane fuel cell.

The invention discloses a non-toxic photoelectrochemistry competition immunoassay method of zearalenone based on a peptide sensor. According to a sensing interface building method, carbon nanohorns, cysteamine functional golden cone and polyglycine are used as substrates; corn zeranol antibodies (Ab) are further immobilized; tyramine functionalized nanometer rutile type TiO2 mesoscopic crystals are used for immobilizing peptide chains with the specific sequences as a photoelectric probe; the peptide chain has the effect of simulating the zearalenone, the zearalenone can compete with the markedphotoelectric probe to combine the corn zeranol antibodies immobilized on the sensing interface. The photoelectric probe combined onto the sensing interface can further combine with tyramine-Rutile TiO2 mesoscopic crystal compounds under the catalysis effect of horseradish peroxidase; optoelectronic signals can be further amplified. On the basis, the non-toxic photoelectrochemistry competition immunoassay method on the corn zeranol can be built.

A novel field electron emitting device characterized in that a main portion of an electron emitting source for emitting electrons by an electric field is made of a carbon nanohorn. The field electron emitting device is high in electron emitting efficiency and excellent in productivity.

The purpose of showing the present description is to provide a dense material containing carbon nanohorns. For this purpose, the present description shows the dense material containing carbon nanohorns and having a predetermined three-dimensional shape.

A carbon nanohorn carried material for producing a carbon nanotube by a chemical vapor deposition (CVD) method, including a catalytic metal or a compound thereof contained inside carbon nanohorns or supported on exterior walls of the carbon nanohorns is provided. A carbon nanotube is produced by a CVD reaction using the carbon nanohorn carried material. A novel technical means for producing a carbon nanotube which does not use any noncarbon type carrier, can easily collect and purify the carbon nanotube and can control the length of the carbon nanotube can be provided.

A particular material comprising an atom other than carbon is carried around or inside the carbon nanohorn.