87 results about "Graphitic carbon" patented technology

The utility model provides a sewage pollutant treatment device. The sewage pollutant treatment device comprises an anode chamber, a cathode chamber, a cation exchange membrane, an aeration structure and a data acquisition system, the anode chamber contains electrogenesis bacteria liquid containing electrogenesis bacteria; an anode carbon rod is inserted into the anode chamber and is filled with an anode graphite carbon felt; a cathode carbon rod is inserted into the cathode chamber, and a cathode graphite carbon felt is arranged on the cathode carbon rod; the cation exchange membrane is arranged between the anode chamber and the cathode chamber, and the cation exchange membrane is a proton exchange membrane; the conventional pollutants in the sewage are decomposed by utilizing electrogenesis bacteria in an anode solution in the anode chamber, chemical energy is converted into electric energy, and electrons and protons are generated; electrons reach the cathode through an external circuit, and protons are transmitted to the cathode chamber through the cation exchange membrane; the aeration structure is communicated with the cathode chamber, oxygen dissolved in the cathode chamber is combined with electrons and protons to generate H2O2, then the H2O2 and Fe < 2 + > are subjected to a Fenton reaction to generate hydroxyl radical.OH, and the hydroxyl radical.OH mineralizes novel pollutants in a cathode solution.

In accordance with the present invention, there is provided a process for producing hydrogen and graphitic carbon from a hydrocarbon gas comprising: contacting at a temperature between 600° C. and 1000° C. the catalyst with the hydrocarbon gas to catalytically convert at least a portion of the hydrocarbon gas to hydrogen and graphitic carbon, wherein the catalyst is a low grade iron oxide.

The invention provides a blank molding assembly block of diamond large single crystals and a plastic growth method, and belongs to the technical field of superhard material synthesis. The blank molding assembly block comprises a mutually-embedded metal catalyst layer formed by mutually embedding a plurality of prismatic table metal catalyst structures, the whole mutually-embedded metal catalyst layer is in a prismatic table shape, one of the upper end face and the lower end face of each prismatic table metal catalyst structure is in contact with the high-purity graphite carbon source layer, and the other one of the upper end face and the lower end face of each prismatic table metal catalyst structure is in contact with the seed crystal; the adjacent prismatic table metal catalyst structures are separated by an insulating layer, and the insulating layer is a Ca coating or a BN coating. A mutually-embedded prismatic-table-shaped metal catalyst structure with an axial temperature gradient and a carbon diffusion channel is constructed in a blank assembly block, diamond is induced to grow in a preset direction in an HPHT environment, directional shaping growth of the diamond is achieved under the condition that the process complexity is not improved, and the quality of the diamond is improved. The crystal morphology controllability, the catalytic agent utilization efficiency and the final drilling rate are remarkably improved, and the single-cavity yield is increased.

A catalyst for a metal-air battery includes a nitrogen-doped graphitic carbon support and atomically dispersed niobium atoms disposed on the nitrogen-doped graphitic carbon support. A positive electrode for a metal-air battery includes a catalyst coated layer comprising niobium atoms and a nitrogen-doped graphitic carbon support. The niobium atoms are atomically dispersed on the nitrogen-doped graphitic carbon support. A metal-air battery includes an negative electrode, an electrolyte, and a positive electrode. The positive electrode includes a catalyst coated layer that includes niobium atoms and a nitrogen-doped graphitic carbon support. The niobium atoms are atomically dispersed on the nitrogen-doped graphitic carbon support.

Graphite carbon brick trepanning equipment comprises a base, a power part, a drilling self-water-inlet connecting part, a drilling assembly, a carbon brick supporting device and a carbon brick pressing device. One end of the drilling self-water-inlet connecting part is installed at the output end of the power part, the other end of the drilling self-water-inlet connecting part is installed on the drilling assembly, and the drilling assembly and the drilling self-water-inlet connecting part are coaxial. The carbon brick supporting device comprises a height adjusting mechanism and a transverse adjusting mechanism; the height adjusting mechanism is installed on the base, and the transverse adjusting mechanism is installed on the top of the height adjusting mechanism. During use, the carbon brick pressing device can press a carbon brick needing to be perforated on the top of the transverse adjusting mechanism from the upper portion, and the carbon brick is prevented from moving; according to the drilling device, the drilling assembly is arranged, then the hole forming position of the carbon brick can be adjusted to be right opposite to the drilling assembly through the height adjusting mechanism and the transverse adjusting mechanism, the end of the drilling assembly is accurately aligned to the position needing hole forming, one-time through hole forming from the single side of the carbon block can be achieved when large-size carbon block drilling is conducted, and the hole forming precision of the carbon block is guaranteed.

The invention relates to a fuel cell system with hydrogen separation and hydrogen regeneration capabilities. A fuel cell system including an electrochemical hydrogen pump (EHP) and a polymer electrolyte membrane fuel cell (PEMFC) is provided. The EHP includes a first membrane electrode assembly having a first electrolyte membrane, an anode, a cathode, and a bipolar plate, while the PEMFC includes a second membrane electrode assembly having similar components. The hydrogen gas generated by the EHP is supplied to the anode of the PEMFC for power generation. The system is characterized by high temperature operation, effective hydrogen transfer via a silica binder, and an optimized bipolar plate made of graphitic carbon having a low resistance and thermoset resin content. The system ensures efficient power generation with minimal hydrogen loss and operates without the need for additional mechanical or electrical auxiliary equipment components.

A carbon composition useful as a sodium-ion battery anode material, the composition comprising an amorphous carbon material containing randomly oriented graphene platelets along with the following additional features: (i) nanovoids contoured by layers of the graphene platelets, wherein the nanovoids have a size of 2-20 nm; (ii) sub-nanopores that traverse said layers and having a size of 0.2-0.6 nm; and (iii) microchannels connecting between said nanovoids, wherein said microchannels have a width less than 2 nm Further described herein are sodium-ion and potassium-ion batteries containing the carbon composition incorporated into an anode of the battery. Further described herein is a method for producing the carbon composition by gradual heating of a carbonaceous precursor material such as biomass or plastic waste.

The present invention mainly relates to a process for preparing sub-micrometer-sized graphitic carbon nitrides, comprising a step of milling or sonicating graphitic carbon nitrides. The present invention also relates to a sub-micrometer-sized graphitic carbon nitride having a volume size distribution in which the particle size of less than 1 μm dominates more than 50% of a volume of total particles in the suspension.

The invention relates to a preparation method of a secondary ball-milled sulfur-doped phosphorus-carbon negative electrode material and application of the secondary ball-milled sulfur-doped phosphorus-carbon negative electrode material in a sodium-ion battery. The preparation method comprises the following steps: respectively weighing a proper amount of phosphorus source, carbon source and sulfur source according to a certain ball-to-material ratio; the phosphorus source can be selected from red phosphorus or black phosphorus, and the carbon source can be a carbon material with good conductivity and structural stability, such as graphite, carbon nanotubes, conductive carbon black and the like; the sulfur source may be a mixture of an inorganic sulfur source and a sulfur-containing biological agent. The primary ball-milling comprises the following steps: adding a phosphorus source and a carbon source into a ball-milling tank according to a certain proportion, and carrying out ball-milling treatment at a certain rotating speed for a certain time under the protection of inert gas, so that the phosphorus source and the carbon source are fully hybridized to form a phosphorus-carbon bond; and mixing the phosphorus-carbon material obtained by primary ball milling with a sulfur source, uniformly adding the mixture into the ball milling tank, carrying out secondary ball milling treatment at a certain rotating speed for a certain time under the protection of inert gas, and gradually dispersing and doping the sulfur source into the phosphorus-carbon system in the process to form the sulfur-doped phosphorus-carbon negative electrode material.

The application relates to the technical field of electrocatalysis, in particular to a preparation method and application of a bismuth nanocrystal / nitrogen-rich graphite carbon electrocatalyst, which comprises the following steps: S1, adding urea and ammonium chloride into water, stirring, freeze-drying, grinding, and obtaining a chelating ligand; S2, adding bismuth citrate into the chelating ligand, carrying out a solid-phase reaction, and obtaining a precursor; and S3, calcining the precursor under nitrogen protection, and obtaining the bismuth nanocrystal / nitrogen-rich graphite carbon electrocatalyst. The problems that reduction and reconstruction reactions are prone to occur in the process of catalyzing CO2 electrocatalytic reduction, and the difficulty in increasing the recognition and performance regulation of active sites can be solved.

Carbon-based composite materials are provided, such as those comprising at least 80 weight % of graphitic carbon comprising functional groups capable of forming hydrogen bonds, the graphitic carbon in the form of a mat of randomly entangled elongated structures; not more than 20 weight % of a polymer or a nanofiber thereof, dispersed within the graphitic carbon, the polymer or the nanofiber thereof comprising corresponding functional groups capable of forming hydrogen bonds with the functional groups of the graphitic carbon; and a plurality of hydrogen bonds at an interface formed between the graphitic carbon and the polymer or the nanofiber thereof, the plurality of hydrogen bonds formed between the functional groups of the graphitic carbon and the corresponding functional groups of the polymer or the nanofiber thereof.

An anode material for a lithium ion battery comprises a carbonaceous silicon composite material. The composite material comprises Si nanoparticles, and nanostructured and microporous graphitic carbon and / or silicon carbide, wherein the graphitic carbon and / or silicon carbide are derived at least in part from carbonized metal organic framework.

METHODS FOR REDUCING THE PARTICLE SIZE OF GRAPHITICAL CARBON NITRIDE The present invention relates primarily to a method for preparing submicrometer-sized graphitic carbon nitrides, comprising a step of grinding or sonicating the graphitic carbon nitrides. The present invention further relates to a submicrometer-sized graphitic carbon nitride having a volume size distribution in which particles smaller than 1 μm dominate more than 50% of the total particle volume in the suspension. Figure for the abstract: Figure 4

A method is disclosed for producing carbon fibers with active components such as those for oxygen reduction reactions (ORR). The method includes electrospinning a solution of polyacrylonitrile (PAN) and a transition metal into composite fibers; and annealing the composite fibers in an inert / reducing atmosphere.

The application provides an aromatic hydrocarbon oil for mesophase pitch and a preparation method and application thereof. The preparation method comprises the steps of purification, refining, reforming, conversion and purification. The method can convert and purify heavy residual oil into aromatic hydrocarbon oil with high aromatic hydrocarbon content, and the obtained aromatic hydrocarbon oil has narrow molecular weight distribution interval, low ash content and low sulfur content. The mesophase pitch prepared by using the aromatic hydrocarbon oil through different processes has high mesophase content, uniform molecular weight distribution, good large streamline body configuration of mesophase morphology, low ash content and sulfur content, suitable softening point and good spinnability, and is applied to the preparation of carbon fiber or graphite carbon foam and other carbon materials, and has excellent performance. Moreover, the equipment used in the method is all conventional industrial production equipment, so that the equipment investment and production difficulty of related enterprises for converting production of the aromatic hydrocarbon oil can be greatly reduced.

Liquid admixtures including three-dimensional graphene (3DG carbons) for cementitious materials including high performance concrete formulations. The 3DG carbons may include a carbon-based material including flaky graphene and nodular graphene. The 3DG carbons may include three-dimensional graphene flakes and amorphous graphitic carbon. A concentration of 3DG carbons in the liquid admixture may be less than approximately 100 g / liter. Concrete compositions including 3DG carbons. The compressive strength of an example concrete composition including 3DG carbons and measured using ASTM C39 at a hydration period of 28 days may be at least 55 MPa.

The present invention relates to composites comprising graphitic carbon dispersed within a polymer matrix. The composites have high thermal conductivities and are particularly useful in solar thermal collectors and other heat exchangers.

A method of increasing porosity of graphitic carbon black comprises combining graphitic carbon black having a Raman planar size (La) of at least 20 Angstroms with at least 100 ppm of an alkaline earth element selected from strontium, barium, and a mixture of both to form a mixture, and contacting the mixture with an etchant at a temperature of 900-1400° C. until 2%-85% of the mass of the carbon black is lost.

The invention discloses a composite refractory material blast furnace skimmer and a preparation method thereof. The blast furnace skimmer is prepared from sintered corundum, brown corundum, white corundum, chromic oxide or activated aluminum oxide, zirconium oxide or boron carbide, metal chromium powder or metal aluminum powder, squamous graphite, silicon carbide, silicon carbide, aluminum oxide fibers, polypropylene explosion-proof fibers, high-temperature asphalt powder and a polyphosphate dispersing agent in different specifications. The preparation method comprises the following steps: respectively preparing a powdery raw material and a liquid raw material according to the raw material ratio; and mixing the powdery raw material and the liquid raw material, pouring and molding, and then air-drying, drying and sintering to obtain the product. The blast furnace skimmer provided by the invention has relatively high strength, slag corrosion resistance, scouring resistance, oxidation resistance and thermal shock resistance, and the service life of the blast furnace skimmer is greatly prolonged.

The present disclosure relates to the technical field of nano materials and aims to provide to a method for preparing nano-graphene oxide by electrochemically exfoliating a carbon fiber material. The method includes the following steps: building an electrochemical reaction system by using a raw material with a carbon fiber as a basic structural unit as an anode, a metal or graphitic carbon material as a cathode, and a phosphate buffer solution with a neutral pH as an electrolyte; in an electrolysis process, gradually exfoliating a carbon fiber in the anode raw material and dispersing the carbon fiber in the electrolyte solution to generate graphene oxide; centrifuging to separate the reacted electrolyte solution, taking upper dispersion liquid, and washing away residual anions and cations; and performing ultrasonic treatment to obtain nano-graphene oxide dispersed in water and free of impurities.

We disclose here the nano-enabled delivery of highly potent 5-hydroxymethyl furfural (5-HMF) to sickled blood cells in patients. 5-HMF, a superior antisickling agent, has been formulated to address the limitations of existing treatment modalities arising from disfavorable pharmacokinetics of the drug compound. Specifically, two complementary 5-HMF prodrugs are integrated as a ‘protected’ biocompatible composite nanoparticle designed to readily fuse with RBCs and be amenable to transdermal delivery (5-HMF-grafted-phospholipid layered over a sucrose-derived graphitic carbon dot core). These RBC-targeted, protected, biocompatible, self-assembled 5-HMF prodrug nanoparticles for sickle cell disease are the first in class technology for offering a treatment for sickle cell disease which has improved potency, targeted payload delivery, and extended release with the red blood cells with enhanced pharmacodynamic effect in a treated patient.

The invention relates to the technical field of environmental protection and resource recycling, in particular to a method for preparing a catalyst by taking positive electrode metal and negative electrode graphite of a retired power battery as raw materials and application of the catalyst. According to the preparation method, waste battery positive electrode powder is treated by ammonium persulfate to obtain NiCoMnOx powder, the NiCoMnOx powder still maintains a two-dimensional structure after lithium removal, then battery negative electrode graphite is subjected to ultrasonic treatment to be in a sheet shape, and finally, the NiCoMnOx powder and the graphite are subjected to ball-milling compounding by a mechanochemical method to obtain the NiCoMnOx / graphite carbon catalyst. The catalyst is of a two-dimensional-two-dimensional structure and has a large specific surface area, more active sites can be exposed, graphite can generate a reduction effect in the ball-milling reaction process to enable the catalyst to generate more oxygen vacancies, and a good catalytic oxidation degradation effect on VOCs is shown at low temperature. The method is simple in process and low in cost, and the dual goals of resource utilization of the waste batteries and efficient treatment of VOCs are achieved.

A process for producing hydrogen and graphitic carbon from a hydrocarbon gas includes contacting at a temperature between 600° C. and 1000° C. the catalyst with the hydrocarbon gas to catalytically convert at least a portion of the hydrocarbon gas to hydrogen and graphitic carbon, wherein the catalyst is a low grade iron oxide.

The application discloses a kind of with multi-sublayer circulation amorphous carbon / molybdenum disulfide composite coating and its preparation method and application, belong to coating material technical field.The application adopts multi-target magnetron sputtering system to construct multi-sublayer circulation graphite-like carbon / molybdenum disulfide composite coating, sequentially including substrate surface treatment, chromium metal bonding layer and gradient transition layer (Cr→Cr / a-C→a-C) are deposited on substrate surface, high-hardness a-C support layer (a-C) is deposited on the surface of gradient transition layer (Cr→Cr / a-C→a-C), graphite-like carbon sublayer (GLC), sulfur-doped graphite-like carbon sublayer (S / GLC) and molybdenum disulfide sublayer (MoS2) are alternately deposited on the surface of a-C layer, and graphite-like carbon top layer is deposited on the surface of circulation multi-sublayer.The multi-sublayer circulation graphite-like carbon / molybdenum disulfide composite coating significantly improves the environmental sensitivity of traditional hydrogen-free amorphous carbon and molybdenum disulfide coating, and can realize excellent lubrication and wear resistance in vacuum, dry and humid atmosphere and other environments.

The present application relates to iron-making technology field, propose a kind of for vanadium-titanium magnetite smelting blast furnace hearth structure and cooling control method, the blast furnace structure includes furnace bottom brick lining, hearth side wall brick lining and be located in the hearth side wall brick lining below furnace base;Furnace bottom brick lining and the outside of the hearth side wall brick lining is provided with smooth cast iron cooling wall, the inside of the furnace base is provided with cooling device;The furnace bottom brick lining is successively provided with heat preservation brick layer and heat-conducting brick layer from hearth bottom to furnace base direction, heat preservation brick layer includes dense clay brick and composite mullite brick, the heat-conducting brick layer is semi-graphite carbon brick;Hearth side wall brick lining is built with the composite mullite brick, and in the corner of hearth and furnace bottom, hearth side wall brick lining extends to form brick lining reinforcing structure in the direction of furnace in.The present application solves the problem of excessive deposition of titanium carbonitride caused by improper temperature gradient when smelting vanadium-titanium magnetite, inhibits the accumulation of hearth center and edge bonding, maintains the hearth active and blast furnace smooth.

The invention relates to a method for removing graphite carbon from double alkaline earth metal-based Mn-doped perovskite, which comprises the following steps of: carrying out decoking reaction by using the double alkaline earth metal-based Mn-doped perovskite as a catalyst, putting a mixture of the double alkaline earth metal-based Mn-doped perovskite and graphite carbon into a tubular furnace, balancing pressure gas as nitrogen, heating to a reaction temperature in a programmed manner, carrying out heat preservation for 2-3 hours, and cooling to room temperature to obtain the double alkaline earth metal-based Mn-doped perovskite. Steam is introduced for decoking, and the adding amount of the double alkaline earth metal-based Mn doped perovskite is 5%-15% of the graphite carbon; the structural formula of the double alkaline earth metal-based Mn-doped perovskite is A < 1-x > A < x > (M < 1-y > Mn < y >) O < 3 >, xlt; 1, 0lt; yt; Yt; 1, A and A are selected from one of Ca, Mg, Ba and Sr, and M is any one of Cr, Fe, Co and Ni. According to the invention, efficient conversion of graphite carbon is realized, the conversion rate of graphite carbon in a water vapor atmosphere is increased from 40.25% to 74.4%, and the problem that shaped coke-graphite carbon is difficult to remove is solved.

The invention relates to the field of sodium ion battery manufacturing, in particular to a preparation method of a glucose and magnesium gluconate hard carbon composite material, which comprises the following steps: S1, glucose solution preparation: dissolving 1-10g of glucose in 10-100ml of deionized water; s2, a magnesium gluconate solution is prepared, wherein 1-5 g of magnesium gluconate is taken and dissolved in 10-100 ml of deionized water; s3, mixing glucose and the magnesium gluconate solution at normal temperature, and magnetically stirring for 1-10 hours; s4, pouring into a reaction kettle for hydrothermal reaction. Glucose and a magnesium gluconate solution are mixed to prepare hydrothermal carbon, the hard carbon material is formed after two times of carbonization, glucose can form a graphite-like carbon layer structure in the carbonization process, magnesium gluconate generates magnesium oxide in the reaction process, magnesium oxide serves as a template agent to further form a microporous structure, and the hard carbon material is prepared. The proportion of the graphite-like carbon to the microporous structure is controlled by adjusting the carbonization temperature, so that the transportation path of sodium ions is improved.

The present application relates to the technical field of electrocatalytic materials, in particular to a heterogeneous structure catalyst for reducing nitrate and a preparation method and application thereof, the catalyst comprises a porous graphite carbon carrier and a heterogeneous structure formed by iron monatomic atoms and iron nanoclusters supported on the carrier, wherein the iron monatomic atoms and the iron nanoclusters are formed by in-situ pyrolysis of triruthenium dodecacarbonyl precursor on the carbon carrier, realizing synergistic catalysis of different functional sites, thereby improving ammonia yield and Faraday efficiency, and providing a general technical strategy for designing heterogeneous structure active sites to accelerate series electrocatalytic reactions.

This application provides a conductive carbon black, its preparation method, a shielding material, and a high-voltage cable. The preparation method includes the following steps: mixing a structure-modifying liquid precursor with water to obtain a structure-modifying liquid; the structure-modifying liquid precursor includes at least one of dopamine hydrochloride, tannic acid, citric acid, and tartaric acid; using the structure-modifying liquid to wet-granulate powdered conductive carbon black to obtain wet conductive carbon black particles; and sequentially drying, sieving, and calcining the wet conductive carbon black particles to obtain conductive carbon black. The preparation method of this application first coats the surface of powdered conductive carbon black with a polyhydroxy polar structure-modifying liquid through wet granulation, forming an in-situ coating layer to prevent the conductive carbon black from agglomerating due to electrostatic adsorption, resulting in conductive carbon black with excessively high structure; and then, through drying and calcination, transforms the polar coating layer into a highly ordered graphitic carbon coating layer, thereby effectively improving the electrical properties of the conductive carbon black.

The invention discloses a polyacrylonitrile carbon fiber graphitization production line, a polyacrylonitrile carbon fiber graphitization method and graphite carbon fibers, the polyacrylonitrile carbon fiber graphitization production line comprises a yarn withdrawing frame, a desizing furnace, a passivation furnace, a graphite furnace, a surface treatment machine, a washing machine, a sizing machine, a drying furnace and a winding machine which are arranged in sequence, and the graphite furnace comprises a main graphite furnace and a standby graphite furnace. The two graphite furnaces are adopted, one graphite furnace is used, and the other graphite furnace is standby, when one graphite furnace is overhauled, polyacrylonitrile carbon fibers can be graphitized through the other graphite furnace, the operation cycle of graphite lines can be prolonged, the yield of the graphite carbon fibers is further increased, the situation that domestic M40-grade and M46-grade high-modulus carbon fibers are short of supply can be effectively relieved, and the service life of the graphite fibers is prolonged. And meanwhile, single-line profits are brought to carbon fiber enterprises every year.