167 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.

The invention provides a preparation method and an application of a nitrogen-doped graphene-carbon nanohorn composite material, and belongs to the field of functional carbon materials. The preparation method of the nitrogen-doped graphene-carbon nanohorn composite material comprises the steps of ultrasonically dispersing graphene oxide to form a uniform solution in the presence of a biomass raw material, adding a nitrogen source substance and a carbon nanohorn, performing ultrasonic and uniform dispersion again to obtain a graphene oxide-biomass-nitrogen source substance-carbon nanohorn mixture solution, and drying the mixture to a constant weight, thereby obtaining a nitrogen precursor mixture; and performing normal-pressure high-temperature pyrolysis on the nitrogen precursor mixture to obtain the nitrogen-doped graphene-carbon nanohorn composite material. The prepared nitrogen-doped graphene-carbon nanohorn composite material can be used for electrode materials of lithium ion batteries and supercapacitors. The preparation method is simple; and the obtained composite material is loose in structure and good in nitrogen-doped graphene nanosheet dispersity. The method provides a new way for preparing a nitrogen-doped graphene based composite material.

A novel carbon nanotube-carbon nanohorn complex produced by a method comprising step 1 for irradiating carbon nanotube placed in a liquid solvent with ultrasonic wave to disperse carbon nanotube into the liquid solvent, and step 2 for adding carbon nanohorn aggregate to the liquid solvent dispersed with carbon nanotube to thus remove the liquid solvent, whereby the surface of the carbon nanotube and the carbon nanohorn aggregate can be utilized more effectively and the availability can be enlarged.

The invention provides a Porous conductive graphene / carbon nanohorn composite material. The composite material is characterized in that carbon nanohorn is distributed between graphene sheet layers or on the surfaces of the graphene sheet layers. The composite material effectively prevents or reduces lamination and agglomeration of the graphene sheet layers, a lot of hierarchical structural pores including micropores and meso pores are formed, and the specific surface area is large; and graphene plays a bridging role among the carbon nanohorns, a conductive network structure is formed, and the conductivity is enhanced. The invention also provides a preparation method and applications of the composite material, the material can be used as electrode material or additive in super capacitors, lithium ion batteries, fuel cells and the like, the electrode material is large in electric capacity and high in charging and discharging speed, and the circulation times are increased.

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 discloses a nitrogen hybridized carbon nanohorn-graphite nanocomposite, a preparation method thereof and application of the nanocomposite as a catalyst carrier. A nanometer composite catalyst provided by the invention is composed of the nitrogen hybridized carbon nanohorn-graphite nanocomposite and a transition metal and / or transition metal alloy nano-cluster, wherein the mass percentage content of the transition metal and / or transition metal alloy nano-cluster is 0.1 to 80%, the size of the transition metal and / or transition metal alloy nano-cluster is 0.5 to 20 nm, and the transition metal and / or transition metal alloy nano-cluster is dispersed in a porous nanometer network formed by nitrogen hybridized carbon nanohorns and graphite. As a fuel cell catalyst, the nanometer composite catalyst has excellent electrocatalytic activity and stability in reactions like oxygen reduction and methanol oxidation.

An electrode for an electric storage device includes at least an active material selected from the group consisting of a carbon nanotube, activated carbon, hard carbon, graphite, graphene and a carbon nanohorn; an ionic liquid; and a three-dimensional network metal porous body.

The invention discloses a composite iron trifluoride positive electrode material. The composite iron trifluoride positive electrode material is a FeF3.0.33H2O carbon nanohorn composite material synthesized from carbon nanohorns and Fe(NO3)3.9H2O through a liquid-phase synthesis method. The preparation method of the composite material comprises the following steps: dispersing carbon nanohorns subjected to open pore oxidation treatment into ionic liquid, and uniformly dispersing the carbon nanohorns into the ionic liquid through stirring and ultrasonic treatment; then sequentially adding absolute ethyl alcohol and an iron source, and stirring the mixture until reactants are fully and uniformly mixed; putting the reaction solution into a constant-temperature oil bath reactor, carrying out nitrogen protection, and continuously stirring the mixture until the reaction is stopped; diluting the viscous reaction product obtained in the step 3 with acetone, and centrifuging the reaction product;freezing the centrifugal product in the step 4 by using liquid nitrogen, and volatilizing residual acetone to obtain a target product. The invention further discloses application of the composite material to a lithium ion solid-state battery. The material has good conductivity and is suitable for a high-rate system, and the preparation method is simple.

Disclosed is a sheet-like article containing fibers to the surfaces of which carbon nanotubes and / or carbon nanohorns are adhered. Since many carbon nanotubes and / or carbon nanohorns are adhered to the fiber surfaces in a uniformly dispersed state without agglomerating together, the carbon nanotubes and / or carbon nanohorns form a network structure on the fibers. The sheet-like article is preferably obtained by wet-papermaking the fibers and a liquid dispersion of the carbon nanotubes and / or carbon nanohorns. By using fibers mainly containing cellulose fibers, there can be obtained a preferable sheet-like article.

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.

A graphite cathode and a graphite anode are placed opposite each other through an insulating plate having a notch. A voltage is applied between both of the electrodes to generate arc discharge at the notch of the insulating plate. A given area of the graphite anode is evaporated from an electrode point of the arc discharge, and simultaneously an arc jet is generated from the notch. Thereby, a carbon nanoparticle comprising soot of carbon nanomaterial containing carbon nanohorn is generated. The soot is deposited on a recovering plate for recovery.

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 invention discloses a silicon phthalocyanine functionalized TiO2 mesocrystal based aflatoxin photoelectrochemical detection method. The method is characterized in that a novel carbon nanocomposite formed by carbon nanohorns and carbon quantum dots serves as a sensor support; dendritic phthalocyanine functionalized quasi-octahedral TiO2 mesocrystal is introduced as a bioprobe to realize high-sensitivity detection of aflatoxin. The novel carbon nanocomposite formed by CNHs and CQDs has an excellent photoelectric property; SiPcs functionalized QOTM is superior in photocurrent response and stability as compared with single QOTM. An immunosensor enables mutual competition between standard AFB1 and marked AFB1 in an AFB1 antibody specificity combination process, and target object concentration and photocurrent intensity are in linear relation in a range of 10<-6>-10<2>ng / ml. The method which is universal is provided for ultra-sensitive detection of micromolecular substances.

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.

Nitrogen doped carbon nanohorns function as efficient metal-free oxygen reduction electrocatalysts for anion exchange membrane fuel cells. The disclosure relates to a process for the preparation of nitrogen doped carbon nanohorns with enhanced conductivity and improved surface area.

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.

The invention discloses an application of a water-soluble carbon nano-grade material. The invention relates to the application of the water-soluble carbon nano-grade material in preparing a product with mycoplasma infection inhibiting and / or mycoplasma removing functions. In the application, the water-soluble carbon nano-grade material has hydrophilic groups on the surface. The water-soluble carbon nano-grade material is at least one selected from fullerene, graphene quantum dot, carbon quantum dot, carbon nano-tube, carbon nano-fiber, graphene, graphene oxide, and carbon nano-horn aggregate. The carbon nano-grade material has good biocompatibility, and assists in effectively inhibiting and removing mycoplasma, such that cell activity can be protected to a certain extent.

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.

The invention provides a water-soluble carbon composite nano-material for double phototherapy. The composite nano-material is a pi-pi planar conjugated complex formed by single-walled carbon nano-horns or monolayer curl-free graphene and water-soluble phthalocyanine. A preparation method of the water-soluble carbon composite nano-material comprises the following steps (1) dissolving the water-soluble phthalocyanine with secondary water to prepare a 10-15% aqueous solution, adding the single-walled carbon nano-horns or monolayer curl-free graphene accounting for 45-65 percent of the mass of the water-soluble phthalocyanine, and performing ultrasonic treatment for 30-180 minutes by using an ultrasonic device; and (2) centrifuging, carrying out suction filtering, washing and drying the prepared dispersant. The composite material has photo-thermal and photodynamic double treatment effects in the action of an infrared source, so that the efficiency for killing tumor cells can be strengthened; the preparation method is simple and convenient; the one-step ultrasonic method not only can solve the problem of water solubility of single-walled carbon nano-horns or monolayer curl-free graphene, but also enables the photodynamic treatment preparation to be loaded, and the surface characteristics of the carbon composite nano-material cannot be destroyed by adopting non-covalent modification.

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