268 results about "Graphite carbon" patented technology

The invention is suitable for the technical field of flame retardance of high polymer materials, and provides a core-shell structure graphite phase carbon nitride derivative and a preparation method thereof.The derivative is prepared by the steps that a precursor containing phosphorus and boron elements is mixed with melamine, and phosphorus / boron co-doped graphite phase carbon nitride is prepared through a high-temperature thermal polymerization reaction; and then assembling the phytic acid copper on the surface of the graphite-phase carbon nitride in an in-situ growth manner by adopting an aqueous solution self-assembly method to construct a derivative with a core-shell structure. The invention provides the graphite phase carbon nitride derivative with the core-shell structure, which is green, environment-friendly, efficient and flame-retardant and simple and convenient in process, and the preparation method of the graphite phase carbon nitride derivative, and the graphite phase carbon nitride derivative has wide application prospect and industrialization value.

The invention relates to the technical field of composite catalyst materials, in particular to a ferrocobalt bimetal hydroxide / BCN composite material and a preparation method and application thereof.The preparation method comprises the steps that cobalt nitrate and ferric nitrate are used for preparing a metal salt solution, sodium carbonate and sodium hydroxide are used for preparing a precipitant solution, a B-doped carbon nitride BCN material is added into the metal salt solution to form a uniform suspension, and the suspension is dried to obtain the ferrocobalt bimetal hydroxide / BCN composite material; dropwise adding the precipitant solution into the suspension to obtain a precursor solution, performing hydrothermal reaction on the precursor solution, and performing centrifugal impurity removal and drying to construct a heterostructure between layered double hydroxide and BCN in situ to obtain the Co-Fe LDH-coated BCN composite material. Through boron doping and heterostructure construction, the charge separation capacity of graphite carbon nitride is enhanced, the electron migration efficiency is improved through a heterointerface structure, the metal ion release amount and the cycle stability are controlled, and the catalytic performance is remarkably improved.

The invention discloses a silicon / graphite / carbon-aluminum oxide composite negative electrode material and a green preparation method thereof, and belongs to the technical field of lithium ion batteries. Aiming at the problems of high volume expansion rate and poor cycling stability of a silicon-based negative electrode and high cost of a traditional process, the invention innovatively provides the following scheme: 1) waste photovoltaic silicon wafer ball-milling liquid and waste graphite are taken as core raw materials, and resource recycling is realized; (2) phenolic resin and chitosan are adopted as double carbon sources, a nitrogen-doped carbon layer (the nitrogen content is 3-5 wt.%) is formed through pH-induced self-assembly, and the conductivity and the Li < + > diffusion rate are synchronously improved; and 3) aluminum nitrate is introduced for pyrolysis to generate 2-5nm aluminum oxide for doping, so that the side reaction of the electrolyte is inhibited, and the volume expansion of silicon is relieved (the expansion rate is less than or equal to 120%). The preparation process comprises the steps of silicon / graphite dispersion, double-carbon-source compounding, ammonia water regulation and control precipitation and gradient calcination. Experiments show that the specific capacity of the optimized material under the current of 0.5 A / g reaches more than 800mAh / g, the 100-time cycle capacity retention ratio is more than 98%, the 1000-time cycle capacity retention ratio is more than 80%, the reversible specific capacity under the multiplying power of 3A / g is more than 550mAh / g, and the raw material cost is reduced by 40%. The invention has the advantages of high capacity, long service life, environmental protection and economy, and provides an innovative solution for the fields of power batteries and energy storage.

The invention discloses an aircraft fairing and a fairing body composite material integrated forming process, and relates to the technical field of aviation equipment manufacturing. The forming process comprises the following steps: 1) preparing a prepreg; (2) sectional forming; 3) a curing process; (4) demolding and trimming; 5) an assembly process; the whole of the front section, the middle section and the tail section of the fairing is of a long-size U-shaped streamline structure. According to the invention, through molecular collaborative design of fluorination modification-polysiloxane toughening-cyanate ester interpenetration, the key contradiction of a high-performance fairing material is systematically solved; ultrahigh strength and toughness are realized at the same time by utilizing in-situ nano microphase separation; a dense graphite carbon layer is generated through catalysis, so that efficient halogen-free flame retardance is achieved; by means of the partition design of molecular fluorination and surface metallization, the high wave transmission and lightning protection functions are ingeniously unified. And finally, a new generation of aircraft fairing composite material with force bearing, wave transmission, heat resistance, impact resistance and environmental stability is successfully prepared.

The invention discloses an insulating heat-conducting glass fiber reinforced polyphenylene sulfide composite material and a preparation method thereof. The composite material comprises the following raw material components: 30-50 parts by mass of polyphenylene sulfide, 10-20 parts by mass of glass fiber, 30-50 parts by mass of a heat-conducting filler, 5-10 parts by mass of a compatilizer and 0.3-1 part by mass of a coupling agent, and the heat-conducting filler is selected from one or more of graphite, silicon carbide, aluminum oxide, magnesium oxide, aluminum nitride and hexagonal boron nitride; the compatilizer is selected from a glycidyl methacrylate graft polymer. The polyphenylene sulfide composite material prepared by the preparation method disclosed by the invention has high insulativity, high thermal conductivity and good mechanical properties.

The invention discloses a polymorphic graphite-carbide steel-based multiphase wear-resistant composite material and a preparation method and application thereof.The material is of a composite tissue structure of spheroidal graphite, three-dimensional coralline graphite, multiple carbides and a steel matrix, and the multiple carbides are M3C type carbides and MC type carbides. Comprising the core steps of component design, composite inoculant proportion design, smelting and inoculation treatment, subsequent heat treatment and the like, and is characterized in that synergistic precipitation of spheroidal graphite, three-dimensional coralline graphite and various and multi-size carbides is achieved through chemical component design and inoculation regulation and control; the invention further provides application of the material in high-impact, heavy-load or dry-friction working conditions of crushing or grinding equipment. The material provided by the invention has better comprehensive wear resistance under complex working conditions, has structural stability, impact resistance, lubricity and thermal stability, and has wide engineering application prospects in severe environments such as high impact, high load, dry friction and the like.

The invention provides a low-temperature sodium-ion battery containing a modified negative electrode as well as a preparation method and application of the low-temperature sodium-ion battery. The low-temperature sodium-ion battery comprises a positive electrode, a negative electrode and an electrolyte, the negative electrode comprises negative electrode slurry, and the negative electrode slurry comprises an active substance, conductive carbon, sodium carboxymethyl cellulose and butadiene styrene rubber; the active substance comprises modified hard carbon; the modified hard carbon is prepared by oscillating and mixing hard carbon with a single-walled carbon nanotube, graphite carbon and soft carbon to obtain physical coating, further oscillating and mixing with the doped modified precursor powder, and calcining at high temperature to complete element doping and chemical coating; and the electrolyte comprises an additive selected from trimethylsilyl nicotinate, methyl 4-hydroxy-3-methoxycinnamate and the like. On one hand, the adhesive force of the negative electrode slurry on the current collector is improved, on the other hand, the solvent formula is optimized, the desolvation ability of sodium ions in the electrolyte is improved, the viscosity is reduced, and the additive is added to modify an electrode surface interface film, so that the charge-discharge performance of the battery at low temperature is improved.

The invention provides a surface modified carbon negative electrode material, a preparation method thereof and a battery. The preparation method comprises the following steps: mixing a graphite carbon source and a pore-forming agent, and graphitizing the obtained mixture to form porous graphite; performing oxidation treatment on the porous graphite to prepare porous graphite oxide particles; the porous graphite oxide particles are placed in a tin source solution containing tin cations, the tin source solution is attached to the surfaces of holes of the porous graphite oxide particles, and tin oxide attached to the surfaces of the holes of the porous graphite oxide particles is formed based on the tin source solution; and the porous graphite oxide particles are placed in a carbon-containing reducing gas environment to be subjected to calcination treatment, and the carbon-coated tin nanowires are prepared on the basis of the tin oxide. According to the preparation method, the surface and holes of the carbon negative electrode material are modified by adopting the carbon-coated tin nanowires, so that the discharge performance of the battery at relatively high rate can be effectively improved.

The invention relates to the technical field of composite materials, in particular to a graphite carbon nitride catalytic membrane material and a preparation method and application thereof. The preparation method comprises the following steps: mixing melamine, a halogen source and water, drying, and carrying out heat treatment to obtain the halogen intercalation carbon nitride composite material; mixing the halogen intercalation carbon nitride composite material dispersion liquid with a metal salt solution, then adjusting the pH value to be alkaline, carrying out an in-situ coprecipitation reaction to obtain a metal oxide / halogen intercalation carbon nitride heterojunction, and carrying out vacuum calcination on the metal oxide / halogen intercalation carbon nitride heterojunction to obtain metal oxide / halogen intercalation carbon nitride heterojunction composite powder; mixing the metal oxide / halogen intercalation carbon nitride heterojunction composite powder, a polymer carrier and N, N-dimethylformamide to obtain a spinning solution, and performing electrostatic spinning to obtain a nascent fiber membrane; and calcining the nascent fiber membrane to obtain the graphite carbon nitride catalytic membrane material. The preparation method is high in operability, and the prepared material has the characteristics of stable structure and high catalytic efficiency.

The invention relates to the technical field of electrode paste production, and provides an anti-oxidation high-electrical-stability electrode paste and a preparation method thereof, and the electrode paste is prepared from the following raw materials: BN thick-coated coarse SiC, BN thin-coated fine SiC, carbon-coated graphite, ZrO2-carbon composite microspheres, a filler and a binder in a mass ratio of (16-19): (11-14): (29-32): (7-10): (13-16): (15-18). BN thick coating and BN thin coating are respectively carried out on the coarse SiC particles and the fine SiC particles, so that the balance of oxidation resistance and conductivity is realized; the flake graphite is subjected to light oxidation and carbon coating modification, so that electron transfer is promoted while oxygen is isolated, and the problem of conductive phase isolation possibly caused by an antioxidant layer is avoided; zrO2 at carbon composite microspheres are prepared to improve the structural stability and form a complementary anti-oxygen barrier, so that the synergistic improvement of the oxidation resistance and the conductivity of the electrode paste is realized.

The invention relates to the field of catalytic materials and discloses a copper-zinc-aluminum-alkylated graphite carbon combined catalyst as well as a preparation method and application thereof. The copper-zinc-aluminum-alkylated graphite carbon combined catalyst comprises a copper-zinc-aluminum catalyst and alkylated graphite carbon which are physically mixed, the alkylated graphite carbon is graphite carbon subjected to silane surface hydrophobic modification. The combined catalyst comprises a copper-zinc-aluminum catalyst and alkylated graphite carbon, and based on the hydrophobic property of the alkylated graphite carbon, in the reaction process of catalyzing CO2 hydrogenation to prepare methanol, the thermodynamic equilibrium limitation in the reaction of preparing methanol through carbon dioxide hydrogenation can be broken through by adjusting the equilibrium movement of element reaction, and the catalytic activity of the alkylated graphite carbon is improved. And meanwhile, agglomeration of metal particles can be effectively inhibited. Therefore, the combined catalyst of the present invention can exhibit efficient carbon dioxide conversion rate, excellent methanol selectivity and long-term stability.

The invention belongs to the field of battery materials, and particularly relates to a preparation method of a quickly charged graphite negative electrode material suitable for low temperature, which comprises the following steps: carrying out controllable polymerization on graphite and a carbon source in advance at an oxidizing atmosphere and a temperature T1, and then carrying out carbonization treatment at a protective atmosphere and a temperature T2 to prepare a carbonized material; and mixing the carbonized material with an F-containing polymer, and carrying out micro-decomposition treatment at a temperature T3 to prepare the fast-charging graphite negative electrode material suitable for low temperature. The temperature of the temperature T1 ranges from 280 DEG C to 400 DEG C; the temperature of the temperature T2 ranges from 900 DEG C to 1300 DEG C; the temperature T3 ranges from 360 DEG C to 450 DEG C. The invention also comprises the material prepared by the preparation method and application of the material in a lithium ion battery. The material prepared by the preparation method disclosed by the invention has excellent low-temperature and fast-charging performance.

The utility model relates to the technical field of screening equipment, in particular to a flat screening device for graphite carbon product raw materials, which comprises a shell, a base arranged on the lower portion of the shell, a sealing cover arranged on the upper portion of the shell, and a screening device arranged in the middle of the shell. The side wall of the shell is provided with the through groove corresponding to the position of the installation support, the outer side wall of the installation support is provided with the sealing plate used for sealing the through groove, the installation support is connected with the sealing plate, and the installation support can be replaced only by pulling out the sealing plate when needing to be replaced. And after replacement is completed, only the sealing plate needs to be inserted inwards, replacement of the sieve plate can be completed, meanwhile, the through groove can be sealed, and the leakage phenomenon in the screening process is avoided.

The application discloses a Fe self-catalytic in-situ lithium supplementing and graphite carbon-coated lithium manganese iron phosphate positive electrode material and a preparation method thereof, and belongs to the technical field of lithium batteries. 2+ Catalyze PAN to generate sp 2 Carbon, LiBOB-Li2O microcapsule in-situ lithium supplementing, and then ultra-high speed quenching to obtain the product. 2+ Self-catalysis, integration of carbon coating and in-situ lithium supplementing, greatly improving the conductivity, the first charge-discharge efficiency and the rate performance of the material, simple and controllable process, suitable for industrial production, and the prepared material has high compacted density and excellent cycle stability.

The invention belongs to the technical field of high polymer materials, and particularly relates to a low-friction machinable fluorine-containing composite material as well as a preparation method and application thereof. The middle-low friction machinable fluorine-containing composite material is prepared from the following raw materials in percentage by mass: 80-95% of fusible polytetrafluoroethylene and 5-20% of filler, the filler comprises any one or more of graphite, carbon fiber and polytetrafluoroethylene (PTFE). The low-friction machinable fluorine-containing composite material provided by the invention has low friction coefficient and high compression strength at the same time.

The application belongs to the technical field of compound synthesis, and particularly relates to an alpha-ketoamide derivative and a preparation method thereof, wherein the preparation method of the alpha-ketoamide derivative comprises the following steps: S1, first, a graphite carbon rod electrode and a platinum sheet electrode are respectively assembled on two sides of a 10mL three-port glass bottle; S2, then, a magnetic son is added into the three-port glass bottle, the bottle mouths on two sides are sealed, the three-port glass bottle is transferred to a glove box for feeding, and benzoylformic acid, morpholine and 10mol% of ferrocene in 4mL hexafluoroisopropanol are sequentially added; S3, after the feeding is completed, the last bottle mouth of the three-port glass bottle is sealed, and a constant current of 3mA is introduced for electrolysis. The application realizes the amination reaction of alpha-keto acid by using an electrocatalytic decarboxylation strategy, selectively synthesizes alpha-ketoamide derivatives, and the reaction is suitable for primary amine compounds, secondary amine compounds, is also suitable for aromatic and aliphatic alpha-keto acids, and excellent functional group tolerance is exhibited.

The utility model discloses an outdoor graphitized bamboo charcoal-based plate which comprises a core layer, a plurality of layers of laminated layers are symmetrically arranged on two sides of the core layer, the thickness of the core layer and the laminated layers is gradually reduced according to the gradient of the laminated layer from the core layer to the outermost side, graphite carbon layers are arranged between the core layer and the laminated layers, and graphite carbon layers are also arranged between the laminated layers. The surface of the plate is provided with a graphite carbon layer. The plate adopts a stress distribution homogenization design, namely, a layer thickness gradient design, so that stress concentration can be effectively dispersed and reduced, and the overall mechanical property and the damage resistance of the plate are improved. The graphitized bamboo charcoal has good thermal conductivity, hydrophobicity, mildew corrosion resistance and deformation resistance, meanwhile, the chemical stability of the non-graphitized bamboo charcoal is enhanced, and the graphitized bamboo charcoal is suitable for the fields of outdoor floors, wall decoration and the like and has wide market application prospects.

The invention relates to a micron carbon-based composite filter membrane material with a micro-nano aperture structure and a preparation method of the micron carbon-based composite filter membrane material. The micron carbon-based composite filter membrane material comprises an adsorbent material (a micron carbon-based porous adsorbent) and a binder material (a high-molecular binder), wherein the adsorbent is one or more of activated carbon, graphitized carbon black, porous graphite carbon, a metal organic framework-based porous carbon material, a carbon nanotube and a carbon molecular sieve. The invention has the advantages of acid and alkali resistance and capability of adapting to waste liquid treatment work in various environments, and also solves the problem of connection between an adsorbent and an adhesive interface, the problem of controllable pore size of a filter membrane, the problem of uncontrollable adsorption capacity of the filter membrane and the like. The method provided by the invention can be used in treatment of a variety of industrial wastewater, and has good social value and application value.

The invention discloses petroleum coke, a non-graphite carbon material, a negative electrode material and a preparation method thereof. The method comprises the following steps: performing first solid removal on a first heavy oil raw material to obtain first purified heavy oil; performing second solid removal on the second heavy oil raw material to obtain second purified heavy oil; mixing the second purified heavy oil with nano-porous carbon to obtain third purified heavy oil and heavy oil containing the nano-porous carbon; carrying out solid-liquid separation on the heavy oil containing the nano-porous carbon to obtain a non-graphite carbon material precursor and fourth purified heavy oil; mixing the third purified heavy oil, the fourth purified heavy oil and the first purified heavy oil to obtain heavy mixed oil; carrying out distillation, pyrolysis and modification treatment on the heavy mixed oil to obtain petroleum coke; carbonizing the non-graphite carbon material precursor to obtain a non-graphite carbon material; the negative electrode material is prepared from petroleum coke and a non-graphite carbon material. The petroleum coke and the non-graphite carbon material with relatively high quality are prepared, and the electrochemical performance of the negative electrode material can be improved.

The application relates to a silicon-carbon negative electrode material and a preparation method and application thereof. The preparation method comprises the following steps: obtaining soft carbon microspheres by using a first carbon source for thermal polymerization; performing spray coating of the soft carbon microspheres, a second carbon source, graphite carbon nanodots and an activating agent, cooling and solidifying, first heating and activating, then neutralizing with an acid and washing to obtain a porous carbon sphere precursor; under an inert atmosphere, feeding a silicon source into the porous carbon sphere precursor and performing second heating, so that the silicon source is cracked and elemental silicon is deposited and adsorbed inside the porous carbon sphere to obtain a porous silicon-carbon sphere; heating and warming the porous silicon-carbon sphere and feeding an organic gas to form a carbon layer on the surface of the porous silicon-carbon sphere, and finally obtaining the silicon-carbon negative electrode material. The obtained silicon-carbon negative electrode material can avoid separation of the porous carbon sphere and the homogeneous porous carbon layer after external force roller pressing, can prevent particle breakage, can improve the structural strength of the silicon-carbon negative electrode material, and can further improve the capacity of a battery system and the cycle life.

The invention discloses battery black powder capable of recycling and regenerating graphite and a preparation method, and relates to the technical field of lithium battery recycling, and the battery black powder capable of recycling and regenerating graphite meets the condition that W is greater than or equal to 1.4 MPa <-1 >; wherein W = 1 / (P * M); p is the compressive strength of acid-insoluble substances in the battery black powder, and the unit is MPa; m is the thermal weight loss ratio of the acid-insoluble substances in the battery black powder under the anaerobic condition, and no unit exists. The larger the compressive strength of the acid-insoluble substance of the battery black powder is, the stronger the caking ability is, which results in that the subsequent crushing process is more difficult, which is not beneficial to the recovery and regeneration of graphite. Meanwhile, the higher the thermal weight loss is, the higher the non-graphite carbon content is, the graphite carbon capable of being recycled is correspondingly reduced, and recycling of graphite is not facilitated. The battery black powder meets the condition that W is larger than or equal to 1.4 MPa <-1 >, has good processing performance and high regeneration rate, and is more beneficial to subsequent preparation of regenerated graphite.

The utility model relates to the technical field of graphite carbon processing equipment, in particular to a high-protection loading bin for processing graphite carbon products, which comprises a storage bin, a storage part and a blanking part are arranged in the storage bin, a discharge pipe connected with the blanking part is arranged on the lower portion of the storage part, a first sealing valve is arranged at the bottom of the discharge pipe, and a second sealing valve is arranged at the bottom of the discharge pipe. A feeding device is arranged below the discharging part, a transfer pipe is arranged between the discharging part and the feeding device, a second sealing valve is installed on the transfer pipe, sealing protection is conducted through the first sealing valve and the second sealing valve, when discharging is conducted outwards, materials are put into the discharging part firstly, then the second sealing valve is opened for secondary discharging, at the moment, the first sealing valve is closed, and the second sealing valve is opened. Secondary discharging is achieved through the mode, sealing operation is conducted on the storage bin during discharging through the design of the discharging part, compared with a conventional direct discharging mode, external air or impurities can be prevented from entering the storage bin from a discharging gap during discharging, and protection operation on materials is improved.

The invention is suitable for the technical field of graphite carbon plate processing, and provides a graphite carbon plate processing positioning mechanism which comprises a positioning table, a powder suction assembly is installed on the positioning table and used for collecting carbon powder generated by graphite carbon plate processing, and a horizontal displacement assembly and a clamping auxiliary assembly are further installed on the positioning table and used for collecting the carbon powder generated by graphite carbon plate processing. The graphite carbon plate positioning device is used for conducting auxiliary positioning on graphite carbon plates of different sizes, through the arrangement of the positioning assembly, the viscoelastic substance is pressed to form deformation, so that gaps between the graphite carbon plates and the positioning hopper are filled, and the sealing performance and stability between the graphite carbon plates and the positioning hopper are guaranteed through the design; by means of the design, displacement and unstable factors possibly occurring in the machining process are avoided, meanwhile, due to the integrated gas dust filtering unit, the equipment is protected, the service life of the equipment is prolonged, and the cleanliness of the production environment is further improved.

The invention discloses a biomass-based graded porous thin-layer graphite material and a preparation method thereof, and belongs to the technical field of porous thin-layer graphite materials. The preparation method comprises the following steps: obtaining a eutectic solution containing a biomass raw material, alkali and / or alkaline salt and water, and reacting at normal temperature to 250 DEG C to obtain a biomass extract; carrying out sintering treatment on the crushed biomass extract in an inert atmosphere at the temperature of 600-1200 DEG C to obtain carbide; and cleaning the carbide to obtain the biomass-based graded porous thin-layer graphite carbon material. According to the method, biomass raw materials can be efficiently and comprehensively utilized, the thin-layer graphene material with the micropore-mesopore-macropore hierarchical porous structure is obtained, meanwhile, the preparation temperature is low, the preparation process is simple, the resource utilization rate is high, the preparation cost is low, and the obtained material is excellent in performance.

The invention discloses a method for recycling iron phosphate and graphite from residues obtained after valuable metal is extracted from waste lithium battery black powder. The method comprises the following steps: carrying out alkali solution reaction on ferrophosphorus residues obtained after lithium is extracted from lithium iron phosphate black powder, so that elements such as phosphorus, aluminum and titanium are all dissolved in a liquid phase, and the iron element generates ferric hydroxide which is left in alkali-soluble residues; the alkali-soluble residues are soaked in an ammonia complexing solution to remove impurities such as copper and nickel, and then are neutralized by an acid solution with relatively low concentration to obtain an iron salt solution and graphite carbon residues; oxidizing roasting, flotation, purification and drying are carried out on graphite carbon residues, negative electrode carbon residues obtained after valuable metal is extracted from waste ternary lithium battery black powder after optional preliminary purification, and graphite carbon residues obtained after lithium and ferrophosphorus are extracted from current lithium iron phosphate black powder, so that graphite can be recycled; and acid is added into the alkali dissolution filtrate to adjust the pH value to 6.0-9.0, and then the temperature is raised to hydrolyze impurity salts such as aluminum, titanium and chromium dissolved out of the phosphate solution to form hydroxides and metatitanic acid precipitates to be removed, so that finally, the quality of the iron phosphate prepared by the method disclosed by the invention is ensured to reach related standards.

This invention discloses a silicon-carbon composite material, its preparation method, and a lithium-ion battery, belonging to the field of lithium-ion battery material technology. The silicon-carbon composite material includes a core comprising a modified graphite carbon matrix and silicon material formed in the pores and surface of the modified graphite carbon matrix; and a coating layer formed on the surface of the core, the coating layer being a carbon layer. This invention uses modified graphite as the carbon matrix, with silicon material embedded in the pores and surface of the graphite. A first-phase carbon source and a second-phase carbon source synergistically coat the core to form a double-layer carbon coating structure, effectively improving the conductivity of the silicon-carbon composite material, suppressing the volume expansion of silicon material during the charging and discharging process of the lithium-ion battery, and improving the structural stability of the silicon-carbon composite material. When applied to lithium-ion batteries, the silicon-carbon composite material of this invention can effectively reduce expansion and improve rate performance and cycle stability.

The present application relates to the field of high-frequency microwave absorbing material and technology, disclose a kind of multifunctional electromagnetic material with high-frequency electromagnetic absorption and corrosion resistance characteristics and its preparation method and application, the multifunctional electromagnetic material is the core-shell structure with 10-100nm particle size, core is metal magnetic alloy component, shell layer is multilayer graphite carbon;It is obtained by carbonization treatment after dissolving and precipitating of metal salt, surfactant and organic ligand, the magnetic alloy component of core body in material and the graphite carbon matrix of shell layer form conductive network, conducive to the conduction loss caused by electron transition;Mutual hetero-interface is conducive to the interface polarization loss of electromagnetic wave.In addition, magnetic component provides strong magnetic loss, optimizes the impedance matching of wave-absorbing body, further enhances the attenuation ability to electromagnetic wave;And shell layer can effectively prevent the penetration and transmission of various corrosive media on the surface of target matrix, it is a kind of multifunctional electromagnetic material with high-frequency electromagnetic absorption and corrosion resistance characteristics.

The present invention provides a supercapacitor electrode homogenized slurry and a preparation process thereof. The mass ratio of activated carbon, a conductive agent, a dispersant, and a binder emulsion in the slurry is 100:1-10:1-10:1-10. The binder emulsion contains 40% binder and 60% solvent. The binder emulsion is at least one of styrene-butadiene rubber (SBR) emulsion, sodium polyacrylate emulsion, and polytetrafluoroethylene (PTFE) emulsion. The solvent is N-methylpyrrolidone or deionized water. The conductive agent is graphite, carbon nanotubes, or carbon black. The dispersant is polyvinylpyrrolidone or sodium carboxymethylcellulose. The slurry does not require the preparation of a dispersant glue, thus omitting this step and reducing the overall homogenization time. The viscosity of the slurry is 500-800 mPa·s, which is much lower than the viscosity of the original process and has excellent fluidity.

The invention discloses a full-spectrum response type aerogel photocatalyst as well as a preparation method and application thereof. The full-spectrum response type aerogel photocatalyst has a multi-heterostructure, and the multi-heterostructure comprises an in-plane heterostructure of amorphous carbon, graphite carbon and a BCN ring and a TiO2 mixed crystal phase structure of anatase type TiO2 and rutile type TiO2. The catalyst can be applied to preparation of methanol through photo-thermal catalytic reduction of CO2 in any single wave band range or combined wave band range in ultraviolet light, visible light and near-infrared light; the preparation method of the full-spectrum response type aerogel photocatalyst comprises the following steps: a) preparation of reduced TiO2 nanoparticles; b) preparation of aerogel; and c) high-temperature carbonization. The aerogel photocatalyst not only can realize full-spectrum response, but also can realize in-situ generation and regulation of oxygen vacancies in photo-thermal catalysis, so that the efficiency of reducing CO2 to prepare methanol is improved.

This invention discloses an Fe-doped graphitic carbon nitride material with nitrogen defects, its preparation method, and application. Iron nitrate nonahydrate and 8-hydroxyquinoline are heated in a water bath, and after adjusting the pH, an inky iron ligand is precipitated. The iron ligand is then mixed with melamine and calcined in air to obtain a gray-black powder material, CN-Q-Fe. This material has great potential for treating antibiotic contamination in aquatic environments, and exhibits excellent photocatalytic degradation of tetracycline antibiotics.