139 results about "Carbon nanosphere" patented technology

The invention provides a platinum-carbon catalyst taking hollow carbon nanospheres as a carrier and a preparation method of the platinum-carbon catalyst. The method comprises the following steps: adding a polymer monomer into a nano template dispersion liquid with a uniform size; then adding a proper amount of platinum salt into the solution to obtain a mixed solution, and stirring to react for 0.5-30 hours to obtain a reaction product; and annealing the reaction product, and then removing the nano template to obtain the platinum-carbon catalyst. The obtained platinum-carbon catalyst takes the hollow carbon nanospheres as a carrier and has a larger specific surface area, the platinum catalyst is loaded on the surfaces of the carbon nanospheres and can be in better contact with an electrolyte, and the obtained catalyst has good electrochemical activity and shows excellent electro-catalytic hydrogen evolution performance and oxygen reduction performance; and the related preparation method is simple and reliable, is suitable for preparation of an electrocatalytic hydrogen evolution electrode and an oxygen reduction electrode, and has a good application prospect in the fields of proton exchange membrane electrolytic cells, hydrogen fuel cells and the like.

The invention discloses an environment-friendly cooling anti-radiation refrigeration coating and a preparation method thereof, and belongs to the technical field of coating preparation. The raw materials are prepared from core materials, auxiliary materials and ingredients. The core material is prepared from a main raw material, hollow glass beads and environment-friendly resin, the auxiliary material is prepared from a nano additive and mineral pigment, and the ingredients are prepared from ferroferric oxide, nano titanium dioxide, diopside and polyvinylidene fluoride. The main raw materials comprise carbon quantum dots, carbon nanofibers, carbon nanospheres and graphene quantum dots; the environment-friendly resin base material is prepared from waterborne polyurethane resin, rosin resin, shellac resin and polytetrafluoroethylene; the nano additive is composed of silicon carbide, carbon black, carbon fibers, magnesium borate and carbon nanotubes. According to the coating, solar energy can be converted into light energy, the sunlight reflectivity of the coating is improved through the unique optical property of the coating, the sunlight reflectivity of the coating can be correspondingly improved along with increase of the sunlight intensity, and therefore the situation that a building absorbs excessive heat is avoided.

The invention discloses a multifunctional nano-enzyme as well as a preparation method and application thereof, and belongs to the technical field of nano-enzyme synthesis. Aiming at the problems that a traditional nano-enzyme is single in activity, limited in treatment effect, poor in tumor active targeting specificity and the like, the multifunctional nano-enzyme provided by the invention is simple and efficient in preparation method, and is prepared by taking N and P double-doped hollow carbon nanospheres as a carrier, loading L-arginine and glucose oxidase and taking an aptamer as a targeting molecule. The multifunctional nano-enzyme is small in particle size, high in dispersion degree and good in biological safety. The multifunctional nano-enzyme not only has the activities of peroxidase, nitric oxide synthase and glucose oxidase, but also has excellent photo-thermal conversion capacity in tumor targeted therapy. The multifunctional nano-enzyme provided by the invention has a tumor focus specific recognition capability, can be highly enriched at a tumor part, finally realizes the purpose of photothermal / catalytic treatment combined tumor treatment, and provides a new thought and platform for tumor treatment.

The invention discloses a preparation method of a carbon packaged porous hard carbon / Si composite negative electrode material, and belongs to the technical field of new energy materials. The carbon nanospheres, hexadecyl trimethyl ammonium bromide, ammonia water, m-aminophenol and formaldehyde jointly act on the porous hard carbon / Si composite material, volume expansion of a silicon-based material can be effectively relieved, the transmission distance of lithium ions is shortened, and the cycling stability of an electrode plate is improved. By using the carbon-packaged porous hard carbon / Si composite negative electrode material disclosed by the invention, the cycling stability of a lithium ion battery is remarkably improved, the capacity is not obviously attenuated during large-current charging and discharging, and meanwhile, excellent rate capability is also shown.

The invention belongs to the technical field of battery negative electrode materials, and particularly relates to a phosphorus-based negative electrode material with a coating structure as well as a preparation method and application of the phosphorus-based negative electrode material. On the basis of the prior art, nano nickel phosphide, red phosphorus and carbon nanospheres are subjected to ball milling to prepare a main body phosphorus-based material, and then the main body phosphorus-based material is coated with a coating layer prepared from a nanofiber material, pyrrole and 5-azaindole, so that the coating layer of the phosphorus-based negative electrode material has elasticity, the volume expansion rate of the phosphorus negative electrode material is reduced, and the service life of the phosphorus negative electrode material is prolonged. According to the nickel phosphide-based negative electrode material and the preparation method thereof, the interface interaction between the phosphorus-based negative electrode material and the binder is enhanced, the prepared nickel phosphide grows on the black phosphorus nanosheet, so that the nickel phosphide has good dispersity, the nickel phosphide nanocrystals can be effectively prevented from being agglomerated, and the energy storage capacity of the nickel phosphide is improved; and after the 5-hydroxy vanillin is grafted, the adhesive has excellent wet adhesion resistance, and can prevent the dissolution of phosphorus element, so that the cycle efficiency of the electrode is improved.

The invention belongs to the technical field of electro-catalytic materials, and particularly discloses an N / O co-doped carbon bowl electrode material and a preparation method and application thereof. The preparation method comprises the following steps: mixing ammonia water, silicon alkoxide, alcohol and water to obtain a mixed solution; mixing the mixed solution, resorcinol and a formaldehyde solution, centrifuging to obtain a precipitation sample, and annealing the precipitation sample to obtain solid carbon nanospheres; the solid carbon nanospheres and an alkaline solution are subjected to an etching reaction, and an N / O co-doped carbon bowl electrode material is obtained; the time of the etching reaction is 90 to 100 hours. The prepared N / O co-doped carbon bowl electrode material is a metal-free carbon catalyst, and a prepared N / O co-doped carbon bowl electrode has high ORR activity, excellent 2e-selectivity and long-term stability, and has important significance for promoting acidic electrosynthesis of H2O2.

The invention discloses a flame-retardant fiber and application thereof, the flame-retardant fiber comprises a flame-retardant fiber matrix and an organic-inorganic flame-retardant coating coated on the flame-retardant fiber matrix, and the organic-inorganic flame-retardant coating is formed by adopting an organic-inorganic phosphorus-containing flame retardant; according to the organic and inorganic phosphorus-containing flame retardant, hydroxylated carbon nanospheres are adopted as a core layer, a reaction product of bis (4-chlorphenyl) phosphoryl chloride and derivatives thereof and 4, 4 '-diaminodiphenyl sulfone and derivatives thereof is adopted as a shell layer, and the core layer and the shell layer are connected through acting force including covalent bonds and / or hydrogen bonds to form a core-shell structure; the flame-retardant fiber disclosed by the invention not only has an excellent flame-retardant effect, but also has better effects in other aspects such as antistatic property, spinnability, fiber system stability and the like, and is suitable for preparing flame-retardant textiles.

A lithium tantalate reducing agent and blackening process containing nanomaterials, belonging to the technical field of crystal materials, comprises the following raw materials in weight percentage: FeSiAl micron sheets, carbon nanospheres and Fe-C core-shell nanoparticles are uniformly mixed in a mass ratio of 90:5:5, and stirred by an electric stirrer. The present invention can realize a simple and controllable blackening process of lithium tantalate, and at the same time, by controlling the temperature of the central temperature zone, ensure the effect of different blackening temperatures, and realize the regulation of yellow light transmittance and resistivity of lithium tantalate wafers.

The invention discloses a multi-cavity mesoporous carbon nanosphere battery material and a preparation method and application thereof, and belongs to the technical field of ion batteries, the method comprises the following steps: mixing a cosolvent and a surfactant, and stirring until the cosolvent and the surfactant are dissolved; adding a carbon source monomer, and stirring until dissolving; adding a pore-foaming agent, and stirring to form a suspension; and finally, adding a hydrogen bond catalyst, and after the stirring reaction is finished, washing, freeze-drying and carbonizing to obtain the multi-cavity mesoporous carbon nanosphere battery material. The problems of poor micelle stability and low repeatability of a traditional soft template method are solved through cooperative regulation and control of catalysis of the hydrogen bond catalyst and precise assembly time. By simply controlling the reaction time, a product with the multi-cavity structure reaching 65.3%-92.5% is stably and repeatedly prepared and far exceeds 31.7% of that of a non-catalytic system, and precise customization of the microstructure of the material is achieved. The multi-cavity structure can better buffer the volume change caused by sodium ion intercalation / deintercalation in the charging and discharging process, and is beneficial to maintaining the structural integrity of the electrode material.

The invention discloses a C60 nanofluid minimal quantity lubrication turning method for a difficult-to-machine material, and belongs to a machining method. The cutter is especially suitable for cutting machining of difficult-to-machine materials. The nanofluid is prepared from fullerene C60 carbon nanospheres, trace lubricating oil based on plant components and a high-efficiency dispersing agent through accurate proportioning and a specific preparation process. The fullerene C60 carbon nanospheres can form a stable dispersion system in the cutting fluid due to the unique molecular structure and physicochemical properties, and exert excellent lubrication and antifriction effects in the cutting process. The trace lubricating oil has good biodegradability and environmental friendliness, and also has good lubricating performance and cooling performance. The dispersing agent ensures that the carbon nanospheres are uniformly dispersed in the cutting fluid, and agglomeration and precipitation are avoided. The nanofluid can remarkably improve the lubricating effect and cooling performance of cutting machining, reduce the cutting force and cutting heat, prolong the service life of a cutter and improve the machining quality and efficiency.

The invention provides a nitrogen-doped carbon nanosphere-molybdenum carbide-carbon nanotube composite material and a preparation method and application thereof in hydrogen evolution by electrolysis of water, the preparation method comprises the following steps: combining phosphomolybdic acid with dopamine through interaction, grinding with melamine to fully mix, and finally calcining in one step to obtain the nitrogen-doped carbon nanosphere-molybdenum carbide-carbon nanotube composite material. The nitrogen-doped carbon nanosphere-molybdenum carbide-carbon nanotube composite material is prepared by the following steps of: carbonizing polydopamine and melamine and doping nitrogen and molybdenum, catalyzing molybdenum to generate a carbon nanotube, and finally obtaining the nitrogen-doped carbon nanosphere-molybdenum carbide-carbon nanotube composite material, and applying the nitrogen-doped carbon nanosphere-molybdenum carbide-carbon nanotube composite material to the catalytic research of hydrogen evolution reaction by electrolysis of water. Compared with the traditional preparation method, the method disclosed by the invention is simple, rapid, mild in reaction condition and high in yield, and the prepared composite material is uniform in morphology and has excellent electro-catalytic performance on a water electrolysis hydrogen evolution reaction.

The invention discloses a targeted nano drug delivery system and application thereof in chemotherapy-photothermal combined treatment of breast cancer, and belongs to the technical field of tumor treatment. According to the targeted nano drug delivery system, oxidized mesoporous carbon nanospheres are used as carriers, P6 peptides specifically combined with RON receptors are modified on the surfaces of the carriers, and cytotoxic drugs are loaded in the carriers. The drug loading rate of the nano drug delivery system can reach 83.5%, and the nano drug delivery system has good biocompatibility, can specifically target breast cancer cells, has good photo-thermal performance, realizes a chemotherapy-photo-thermal therapy combined treatment effect, and provides a new thought for breast cancer treatment.

The present application discloses a process for preparing a silica gel bag. The process for preparing the silica gel bag comprises the following steps: (1) stirring silica gel, fumed silica / graphene composite material, surface-modified carbon nanospheres, hydroxymethyl cellulose, and a curing agent at a stirring temperature of 60-80°C for a stirring time of 1-3 hours to obtain a mixture; (2) extruding the mixture obtained in step (1) to obtain a sheet, and transporting the sheet to an injection mold for injection molding at an injection temperature of 55-65°C for a time of 30-45 seconds; after the injection molding is completed, removing the mold core, closing the mold, and then inflating the mold core. After the inflation is completed, curing is performed at a curing temperature of 180-200°C for a curing time of 3-6 minutes to obtain a silica gel bag. The silica gel bag prepared in the present application has good mechanical properties, antibacterial properties, and long-lasting antibacterial properties.

This invention discloses a low rolling resistance, high wear resistance, tear resistance, and energy-saving conveyor belt cover rubber and its preparation method, belonging to the technical field of conveyor belt cover rubber. The cover rubber is a vulcanized rubber composite with a self-layering structure, comprising, sequentially from the working surface of the cover rubber to the bonding surface with the belt core. This invention utilizes a vulcanized rubber composite with a self-layering structure to form a wear-resistant surface layer, a tear-resistant intermediate layer, and an adhesive bottom layer sequentially from the working surface to the bonding surface with the belt core. By utilizing the selective distribution of oxidized carbon nanospheres, modified basalt short fibers, and modified layered silicates during the latex co-precipitation process, the concentration of oxidized carbon nanospheres in the wear-resistant surface layer is not less than 85% of the total, the concentration of modified basalt short fibers in the tear-resistant intermediate layer is not less than 80% of the total, and the adhesive bottom layer is a pure rubber layer. This achieves a synergistic improvement in low rolling resistance, high wear resistance, and high tear resistance in a single cover rubber, resolving the contradiction that traditional cover rubbers struggle to achieve these properties simultaneously.

The utility model relates to the field of hydrogen preparation, in particular to a drying device of a hydrogen generator, which comprises a drying pipe and an indication label adhered above the surface of the drying pipe, the top end of the drying pipe is fixedly connected with a connecting upper pipe, and the bottom end of the drying pipe is fixedly connected with a connecting lower pipe. The drying device comprises a connecting upper pipe and a connecting lower pipe, sealing inner pipes are fixedly connected to the top face of the connecting upper pipe and the bottom face of the connecting lower pipe correspondingly, a sealing upper cover is connected to the top faces of the sealing inner pipes in an inserted mode, limiting pieces are fixedly connected to the two sides of the surfaces of the connecting lower pipe and the sealing upper cover correspondingly, and limiting holes are formed in the two sides of the limiting pieces correspondingly. By arranging the allochroic silicagel desiccant, the 13X molecular sieve and the carbon nanosphere material, the communicating pipe of the drying device is connected with the gas inlet and the gas outlet of the hydrogen generator, so that the purpose of performing multiple drying on hydrogen in the hydrogen production process of the hydrogen generator can be achieved, the drying purity of the hydrogen is ensured, and the drying effect is improved.

The invention discloses a heat-insulating silicone coating and a preparation method thereof, belonging to the technical field of thermal insulation materials. Linear hydrogel is wrapped on the surface of sepiolite fiber / alumina aerogel and used as a bridge to provide uniformly dispersed anchoring points for subsequent cage-like hybrid nanospheres. The cage-like hybrid nanospheres are then used as a cross-linking agent on the surface. Cross-linkable double bonds exist on the surface of the cage-like hybrid nanospheres, thereby forming a ball-chain composite unit structure based on the original linear hydrogel, and polymerizing and cross-linking into a network. After calcination, the cage-like hybrid nanospheres inside are transformed into core-shell carbon nanospheres, which inhibit crack propagation. Carbon chains derived from the linear hydrogel form a macroporous structure, while a mesoporous structure is generated between the cross-linking points of the cage-like balls. The microporous structure is retained inside the core-shell balls, and a better heat-insulating effect is achieved through a multi-level stepped pore structure.

Ligand-coated, doped lithium iron phosphate, wherein the general formula of the ligand-coated, doped lithium iron phosphate is LiFePO4@Mn-TC / N, where T is zinc and / or nickel and / or copper and / or iron and / or cobalt and / or zirconium and / or aluminum and / or gallium and / or chromium, and wherein the ligand-coated, doped lithium iron phosphate is produced by a manufacturing process comprising the following steps: Mixing a phosphate fertilizer, an iron source and a regulator, heating the resulting mixture for a reaction, performing a solid-liquid separation and removing a solid phase for initial calcination to obtain iron phosphate; Mixing the iron phosphate with a lithium source, a carbon source, and a carbon microsphere conductor, stirring the resulting mixture, and subjecting the mixture to a second calcination to obtain carbon microsphere conductor-doped lithium iron phosphate; and Mixing the lithium iron phosphate doped with the carbon microsphere conductor with a sulfite and a liquid-phase ligand, stirring a resulting mixture and subjecting the mixture to aging, crosslinking and third calcination to obtain the ligand-coated lithium iron phosphate, wherein the carbon microsphere conductor comprises carbon nanospheres, 1,6-bis(dimethylamino)hexane, a manganese source, a T source, methacrylamide and a dispersant, and wherein the T source comprises at least one of the following: soluble chloride salts, nitrates or sulfates of zinc, nickel, copper, iron, cobalt, zirconium, aluminium, gallium or chromium.

This invention discloses a flexible composite piezoresistive sensor based on PVA / glycerol / biomass carbon spheres and its preparation method. The sensor comprises a flexible substrate and a conductive active layer, the conductive active layer being distributed within the flexible substrate. The flexible substrate is a polyvinyl alcohol / glycerol composite hydrogel system. The conductive active layer comprises biomass-derived carbon nanospheres and poly(3,4-ethylenedioxythiophene):polystyrene sulfonic acid, with the biomass-derived carbon nanospheres having a particle size range of 150–200 nm. The mass ratio of the polyvinyl alcohol, biomass-derived carbon nanospheres, and the aqueous solution of poly(3,4-ethylenedioxythiophene):polystyrene sulfonic acid is 10:1:5, and the amount of glycerol added is 20%–30% of the mass of the polyvinyl alcohol. The surface structure of the flexible composite piezoresistive sensor is a periodically arranged micro-dome array structure. The sensor of this invention possesses advantages such as high sensitivity, wide response range, fast response, excellent mechanical stability, and environmental friendliness.

The invention provides a method for detecting the sugar content of coffee by using CuAu alloy composite carbon nanospheres as an electrochemical sensing material. The CuAu alloy composite carbon nanospheres used in the method are prepared through a one-step method, high-pressure conditions and gas protection are not needed in the process, and the method has industrial production potential. The spherical symmetrical structure can effectively inhibit the reduction of the specific surface area caused by the aggregation of nano-particles. Compared with detection means such as chromatography and the like needing expensive equipment, the electrochemical method adopted by the invention is simple and convenient to operate, and does not need enzyme to participate in complex pretreatment. In addition, the sensing material provided by the invention only has excellent anti-interference capability on carbohydrates in coffee, and can effectively ensure the test accuracy.

The invention relates to a device and a method for continuously preparing carbon nanospheres from coal-based oil in a macroscopic quantity, an output port of a carbon source preparation tank is connected with a gas inlet of a burner positioned on a synthesis reactor through a feeding pump, another gas inlet of the burner is connected with a combustible gas pipe, a gas-solid separator is arranged at the top of the synthesis reactor, and a carbon sphere conveyor is arranged at the bottom of the synthesis reactor; a solid outlet of the gas-solid separator is connected with a carbon ball conveyor, and a cooler is arranged on an outlet of the carbon ball conveyor; the coal-based oil is adopted as the raw material, the liquid carbon source is obtained through solvent blending, and compared with a traditional method using pure chemicals as the carbon source, the raw material cost is greatly reduced. The carbon nanospheres are synthesized by adopting an oxygen-deficient combustion method, and a burner and a porous baffle are arranged in a synthesis reactor, so that the carbon spheres are synthesized by a one-step method, the synthesis steps are greatly simplified, the synthesis efficiency is improved, and the requirements of large-scale production are met.

The invention provides a porous hollow carbon sphere composite material, a preparation method thereof and a sodium ion battery, and belongs to the technical field of sodium ion batteries. The composite material is mesoporous hollow carbon nanospheres co-doped with nitrogen element, phosphorus element and sulfur element. According to the composite material, mesoporous hollow nano carbon spheres capable of providing negative electrode capacity are designed, and a hollow nano structure is used for providing a space for electrode volume expansion after circulation, so that the discharge capacity and the circulation stability in a sodium ion battery are improved; meanwhile, due to the mesoporous structure on the surface of the mesoporous hollow carbon nanosphere, the diffusion path of sodium ions is greatly shortened, and the separation and embedding of the sodium ions are promoted, so that the specific capacity of the negative electrode material is improved; in addition, by utilizing the synergistic effect of nitrogen, phosphorus and sulfur co-doping, the carbon layer spacing of the mesoporous hollow carbon nanospheres can be obviously enlarged, the active sites can be increased, and the rate capability and the cycling stability can be optimized.

The invention discloses a preparation and detection method of a bisphenol A electrochemical sensor based on a carbon nanosphere composite material, and belongs to the technical field of functional nano composite materials and sensing. The preparation method comprises the following steps: synthesizing carbon nanospheres by a hydrothermal method, carboxylating the carbon nanospheres, performing ultrasonic treatment in a hexadecyl trimethyl ammonium bromide solution, performing electrostatic interaction to obtain a carbon nanosphere / hexadecyl trimethyl ammonium bromide compound, and dispensing compound dispersion liquid on the surface of an electrode to obtain the bisphenol A electrochemical sensor. According to the present invention, the high-conductivity carbon nanospheres, the carboxylation effect for improving the dispersibility and providing more electrochemical sites, and the hexadecyl trimethyl ammonium bromide with the strong adsorption effect are integrated, and the constructed bisphenol A electrochemical sensor has the low detection limit (0.8 nM); the electrochemical sensor constructed by the invention has the advantages of higher detection speed, wider detection range and better reproducibility, and is successfully applied to bisphenol A detection in an actual sample.

The application provides a catalyst and a preparation method and application thereof, relates to the technical field of catalysts, and comprises the following steps: (1) dispersing carbon nanospheres in a solvent, then adding tetrabutyl titanate and an ethanol aqueous solution, uniformly mixing, obtaining titanium dioxide coated carbon nanospheres, and through calcination, obtaining titanium dioxide hollow spheres; (2) dispersing the titanium dioxide hollow spheres in a solvent, adding silica nanoparticles, uniformly mixing, obtaining silica coated hollow spheres, and through calcination, obtaining a carrier; (3) immersing the carrier in a mixed solution containing chloroplatinic acid and nickel nitrate, obtaining a precursor solution; after the precursor solution is sequentially subjected to filtration, drying and a reduction reaction, the catalyst is obtained; and the mass ratio of Pt to Ni in the mixed solution is (1-2):(1-2). The catalyst provided by the scheme can reduce the cracking temperature in the cracking process of polysilane, further shorten the reaction time, and has low catalyst cost and good stability.

The application provides a hard carbon nanosphere, a preparation method and application thereof, and a sodium ion battery anode, and belongs to the technical field of sodium ion battery anode materials. 2,6-diacetylpyridine, 1,8-diaminonaphthalene and a copper salt are reacted in a solvent to obtain a copper coordination polymer precursor; the copper coordination polymer precursor is subjected to first-step pyrolysis under an inert atmosphere to obtain an intermediate product; the intermediate product is subjected to acid pickling treatment; and the product after the acid pickling treatment is subjected to second-step pyrolysis under an inert atmosphere to obtain the hard carbon nanosphere. The hard carbon nanosphere with highly disordered and twisted graphite lattices is prepared through copper ion-mediated polymer precursor pyrolysis, the interlayer spacing is expanded, and the number of stacked layers is limited, so that the sodium ion storage performance is improved.

The invention discloses a preparation method of copper modified lignin carbon nanospheres, which comprises the following steps: adding lignin into tetrahydrofuran, uniformly dissolving, adding water, stirring to remove tetrahydrofuran, and carrying out hydrothermal reaction to obtain lignin nanospheres; zinc nitrate and copper chloride are added into water, and a solution A is obtained; adding adenine into DMF (Dimethyl Formamide) and heating until the adenine is dissolved to obtain a solution Adding lignin nanospheres into water, and ultrasonically dispersing uniformly to obtain a solution C; and adding the solution A into the solution B, then adding the solution C, continuously stirring, centrifuging, and freeze-drying. And drying, mixing and grinding with potassium bicarbonate, and then transferring into a tubular furnace for two-stage calcination to obtain the copper-modified lignin carbon nanospheres. The lignin nanospheres are prepared by adopting a solvent exchange method and are compounded with transition metal copper to realize high-added-value utilization of lignin, and the lignin nanospheres can be used for degrading water pollutants and water-based zinc ion batteries and have excellent degradation effect and electrochemical performance.

The invention provides a method for laser-induced in-situ preparation of a boron-nitrogen co-doped hollow carbon nanocage, which comprises the following steps: selecting boric acid H3BO3 nanoparticles with uniform particle size as a boron element doping source, and preparing a precursor liquid polyamide acid of polyimide as a carbon substrate and a nitrogen element doping source; the preparation method comprises the following steps: uniformly dispersing boric acid H3BO3 nanoparticles in a PAA solution to form an H3BO3 / PAA mixed solution; coating the mixed solution to prepare an H3BO3 / PAA film, and carrying out high-temperature imidization reaction to form an H3BO3 / PI composite film; performing laser induction on the H3BO3 / PI composite film by using a laser direct writing technology to form a boron-nitrogen co-doped carbon structure material in situ; soaking the thin film in hot deionized water, and removing the template to obtain a boron-nitrogen co-doped hollow carbon nanocage structure; the sample with the template removed is dried, the final boron-nitrogen co-doped hollow carbon nanocage product is obtained, the preparation method is novel in process, and a new way is opened up for synthesis of high-performance carbon nanomaterials.

A ruthenium-based bifunctional fuel cell catalyst, its preparation method and application. The present invention belongs to the field of electrochemistry. The present invention solves the problems of different cathode and anode catalysts in existing fuel cells and the scarcity of bifunctional catalysts. Using glucose as the carbon source, NH4Cl as the N source, and nano-MgO as the template, a porous nitrogen-containing carbon nanosphere encapsulating MgO is obtained by high-temperature pyrolysis reaction under an inert atmosphere, and then the MgO template is removed by pickling to obtain a porous spherical shell-shaped nitrogen-containing carbon nanomaterial. The ruthenium-based bifunctional fuel cell catalyst prepared by the present invention is ruthenium loaded on a nitrogen-containing spherical shell-shaped porous nanocarbon material, having the dual functions of hydrogen oxidation and oxygen reduction. After the ruthenium-based bifunctional fuel cell catalyst is assembled as the cathode and anode catalysts into a hydrogen-oxygen fuel cell, its actual discharge performance is about 70% of that of the platinum-based catalyst, which can effectively replace the platinum catalyst, reduce the cost of fuel cells, and is beneficial to the popularization and use of industrialization.

The invention discloses a phthalocyanine resin-based carbon nanosphere and a preparation method thereof, and relates to the field of carbon nanomaterials, the method comprises the following steps: adding a component A into a phthalocyanine resin monomer, and carrying out high-temperature stirring reaction to obtain a phthalocyanine resin prepolymer; the component A comprises a catalyst, organosilane and magnetic metal salt; adding the phthalocyanine resin prepolymer into the ionic liquid, adding an emulsifier, and stirring and curing at high temperature to obtain phthalocyanine resin nanospheres; placing the phthalocyanine resin nanospheres in a tubular furnace or a muffle furnace, heating to a carbonization temperature at a certain heating rate in an inert atmosphere, and performing high-temperature carbonization for a certain time to obtain the carbon nanospheres. The method is simple in preparation process and mild in condition, the element composition, the particle size, the specific surface area and the pore size distribution of the prepared carbon nanospheres can be regulated and controlled through the preparation process, and the carbon nanospheres can be widely applied to the fields of adsorption separation, energy storage, catalytic carriers, electromagnetic wave absorption and biomedicine.

The invention relates to the technical field of coatings, and provides a high-adhesive-force anti-condensation coating for a ring main unit and a preparation method of the high-adhesive-force anti-condensation coating. The high-adhesion anti-condensation coating for the ring main unit is prepared from the following components in parts by weight: 15 to 35 parts of polyurethane resin, 10 to 30 parts of acrylic resin, 15 to 30 parts of filler, 4 to 8 parts of curing agent, 0.5 to 1 part of thickening agent, 0.1 to 0.15 part of defoaming agent, 0.15 to 0.25 part of dispersing agent, 10 to 20 parts of flame retardant, 5 to 8 parts of propylene glycol methyl ether acetate and 2 to 3 parts of propylene glycol methyl ether. The filler comprises modified lignin-based carbon nanospheres. Through the technical scheme, the problem of insufficient adhesive force of the anti-condensation coating for the ring main unit in the prior art is solved.

The invention relates to the technical field of hard carbon negative electrode materials, in particular to a hard carbon negative electrode material and a preparation method and application thereof. The hard carbon negative electrode material is prepared by carbonizing fluorine-doped porous hard carbon nanospheres adsorbed by manganese acetate, the fluorine-doped porous hard carbon nanospheres are prepared by carbonizing a precursor which is prepared from double-bond siloxane, a fluorine-containing acrylic monomer and methacryloyloxypropyl heptaisobutyl POSS (Polyhedral Oligomeric Silsesquioxane). The preparation method of the hard carbon negative electrode material comprises the following steps: S1, dissolving manganese acetate in an ethanol solvent, then adding fluorine-doped porous hard carbon nanospheres, mixing and stirring, and drying to obtain a negative electrode material precursor; and S2, in a nitrogen atmosphere, heating the negative electrode material precursor to 300-400 DEG C, keeping the temperature constant for 2-3 hours, then heating to 500-600 DEG C, keeping the temperature constant for 4-6 hours, and finally cooling to room temperature to obtain the hard carbon negative electrode material. The hard carbon negative electrode material provided by the invention has relatively high first coulombic efficiency.