42 results about "Carbon nanosphere" patented technology

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.

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 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 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 present invention relates to isotopically labelled carbon materials for use in carbon electrodes or electrocatalysts of electrochemical energy storage or conversion systems. The isotopically labelled carbon materials comprise a N-doped hydrothermal carbon aerogel and / or mesoporous N-doped carbon nanospheres. The invention further relates to electrocatalysts and carbon supports comprising the isotopically labelled carbon materials of the invention. The invention further relates to methods of production and uses of the isotopically labelled carbon materials of the invention.

The invention relates to the technical field of packaging materials, in particular to a polylactic acid-based composite packaging material and a preparation method thereof. The polylactic acid-based composite packaging material is prepared from the following raw materials in parts by weight: 100 parts of polylactic acid, 10 to 20 parts of poly (adipic acid) / butylene terephthalate, 6 to 10 parts of glycidyl methacrylate grafted polylactic acid copolymer, 2.1 to 3.6 parts of silane modified montmorillonite powder of which the surface is loaded with carbon nanospheres, 0.6 to 0.9 part of silane modified nitrogen-doped graphene quantum dots, 1 to 1.5 parts of epoxidized soybean oil and 0.2 part of antioxidant. And 0.5 part. By optimizing the raw material formula, optimizing the filler preparation process and the like, the prepared polylactic acid-based composite packaging material has excellent strength, toughness and the like while keeping the degradable characteristic, and also has better barrier property.

The application provides a method for preparing molybdenum carbide / carbon composite nanospheres based on electrostatic spinning technology, which comprises the following steps: adding ammonium molybdate into dimethylformamide, stirring for 2 hours, then adding polyacrylonitrile, and stirring for 6 hours to obtain a spinning solution; loading the spinning solution into a 10 mL syringe for electrostatic spinning to obtain precursor nanospheres Mo@PAN, and placing the precursor nanospheres in a tube furnace for heat treatment to obtain molybdenum carbide / carbon composite nanospheres. The application also provides applications in the fields of electrocatalytic hydrogen evolution, energy storage and coating materials. The molybdenum carbide / carbon composite nanospheres prepared by the method have uniform size distribution and good dispersibility. The spherical structure has good mechanical properties, and can ensure the structural stability of the material in the application process, preventing the microstructure of the material from being damaged. Meanwhile, the nanoscale spherical morphology provides a high specific surface area, which provides more active sites for the material in the applications of catalysis and energy storage, and is beneficial to improving the performance of the material.

The invention 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. The preparation method comprises the following steps: reacting 2, 6-diacetylpyridine, 1, 8-diaminonaphthalene and copper salt in a solvent to obtain a copper coordination polymer precursor, carrying out first-step pyrolysis on the copper coordination polymer precursor in an inert atmosphere to obtain an intermediate product, and carrying out acid pickling treatment on the intermediate product to obtain the copper coordination polymer. And carrying out second-step pyrolysis on the acid-washed product in an inert atmosphere to obtain the hard carbon nanospheres. According to the method, the hard carbon nanospheres with highly disordered and distorted graphite lattices are prepared through pyrolysis of the copper ion mediated polymer precursor, so that the expanded interlayer spacing and the limited number of stacked layers are realized, and the sodium ion storage performance is improved.

The application discloses a kind of for SO2 preparation sulphur nanofiber catalyst and preparation method and application, the catalyst with the mixture of carbon nanospheres and carbon nanofiber hollow tube as template, with manganese oxide and cerium oxide as active component, cobalt oxide as cocatalyst.First, wood is carbonized into carbon nanofiber hollow tube, then carbon nanospheres are loaded on carbon nanofiber hollow tube to form a template, then the template is combined with the active component by hydrothermal method, and finally the catalyst is prepared by removing the template by high temperature calcination.The catalyst is suitable for the use scene of converting sulfur dioxide gas into sulfur, especially suitable for industrial flue gas sulfur dioxide resource, and the process flow is simple, the conversion efficiency is high, has higher economic value and broad market application prospect.

The invention provides monodisperse cyclodextrin derived carbon nanospheres and a preparation method thereof, and relates to the field of materials. The preparation method of the monodisperse cyclodextrin-derived carbon nanospheres comprises the following steps: mixing cyclodextrin, a surfactant and water, and carrying out a hydrothermal carbonization reaction; after the hydrothermal carbonization reaction is finished, a mixture is cooled and centrifugally separated, electrolyte is added in the centrifugal separation process, then a solid product is washed, collected and dried, and the monodisperse cyclodextrin derived carbon nanospheres are obtained. According to the method, the carbon nanospheres with the monodisperse characteristic are prepared on the basis of the hydrothermal carbonization process, the whole process is simple, conditions are mild, the method is environmentally friendly, and the prepared material has wide application potential in the fields of energy storage, adsorbents, catalyst carriers and the like.

The invention discloses a molybdenum-based nitride catalyst prepared based on assistance of carbon sphere confinement polyacid and a method and application of the molybdenum-based nitride catalyst, and belongs to the technical field of water electrolysis hydrogen production catalytic materials. According to the method, glucose serves as a carbon source, carbon nanospheres are synthesized through a hydrothermal method, polyacid (such as phosphomolybdic acid) is introduced to serve as a molybdenum source, and a carbon sphere composite structure with the built-in molybdenum source is formed; then compounding with a transition metal salt solution, drying and grinding to obtain a homogeneous precursor; and finally, nitriding in an ammonia gas atmosphere to convert metal species in situ to obtain the molybdenum-based nitride nanosphere with the hierarchical structure. According to the method disclosed by the invention, accurate regulation and control on material composition, crystal phase and pore structure are realized by regulating and controlling a metal proportion and a nitriding process, and the obtained catalyst has a hierarchical porous structure, high conductivity and fully exposed active sites, shows high catalytic activity and stability in hydrogen evolution and oxygen evolution reactions by electrolysis of water, is suitable for the field of energy conversion, and has wide application prospects. And the method has a good large-scale application prospect.

The invention belongs to the technical field of preparation of catalytic materials, and particularly relates to an ultrahigh-density diatomic mesoporous carbon catalyst as well as a preparation method and application thereof. The ultrahigh-density diatomic mesoporous carbon catalyst provided by the invention comprises a monodispersed mesoporous nitrogen-doped carbon nanosphere carrier, and a first metal atom and a second metal atom which are dispersed on the mesoporous carbon carrier in an atomic scale, the first metal atoms comprise Pt, and the second metal atoms comprise at least one of Co, Fe, Ni, Cu, Mn and Zn; the first metal atom and the second metal atom form an atom pair with a spacing less than 0.3 nm, and a first metal single atom and a second metal single atom; the total loading capacity of the metal atoms is 5-7 wt.%, the site density can reach 3-5 pieces per square nanometer, and the pairing rate of the first metal atoms and the second metal atoms can reach 50-60%. The catalyst solves the ubiquitous problems of low metal atom loading capacity, low active site density, non-uniform structure and difficulty in precise regulation and control existing in diatomic catalysts in the prior art.

The invention discloses nitrogen-oxygen double-doped closed-pore hard carbon nanospheres as well as a preparation method and application thereof, and relates to the technical field of sodium-ion battery materials. According to the preparation method disclosed by the invention, a segmented copolymer surfactant is adopted as a soft template, a nitrogen-containing carbon source monomer is guided to carry out controllable self-assembly, a polymer precursor with an accurate structure is constructed, and then the polymer precursor is subjected to carbonization treatment at a relatively low temperature and is directly converted into a target material. The prepared hard carbon nanospheres have relatively regular spherical morphology with good dispersibility and abundant nanoscale closed pores, uniform double doping of nitrogen atoms and oxygen atoms is realized by using the components of the precursor, and the preparation process is simplified. The particle size (150-300 nm) and the closed pore ratio of the hard carbon nanospheres can be accurately controlled by regulating and controlling the water-alcohol ratio. When the material is applied to a sodium ion battery negative electrode, the material shows excellent rate capability and ultra-long cycle life, and an ideal negative electrode material solution is provided for development of a high-performance sodium ion battery.

The invention discloses a high-rate carbon nanosphere self-assembled film electrode and a preparation method thereof, and the preparation method comprises the following steps: 1, adding an insoluble calcium salt into a sodium alginate solution, and then adding a glucolactone aqueous solution to obtain sodium alginate hydrogel; 2, carrying out evaporation induced drying on the sodium alginate hydrogel to obtain a sodium alginate film; 3, soaking the sodium alginate film in a Fe < 3 + > solution, and performing crosslinking to form an iron alginate film; and 4, calcining and carbonizing the iron alginate film, and carrying out acid pickling and etching to obtain the iron alginate film. The compact carbon film electrode with the density up to 1.18 g cm <-3 > is synthesized through densification and catalytic graphitization processes of the self-assembled nano hydrogel film. These sufficiently small and interlocking nanocarbon spheres (lt; and meanwhile, the self-assembly framework spontaneously generates a network topology ion transmission channel, and the self-assembly framework still has very good energy storage and release capabilities when being used for sodium ion storage under high current density.

The application provides a cerium dioxide / carbon nanosphere composite material and a preparation method and application thereof, and comprises carbon nanospheres and quantum dot cerium dioxide loaded on the inner and outer surfaces of the carbon nanospheres; the particle size of the carbon nanospheres is 0.8-1.2 mu m, and the carbon nanospheres are formed by stacking a plurality of hollow porous micro carbon nanospheres with a particle size of 150-250 nm; the particle size of the cerium dioxide is 2-5 nm; the carbon nanosphere substrate has a multi-cavity structure and can be used as a positive and negative electrode material of a sodium tellurium battery. The high catalytic activity and physical and chemical adsorption characteristics of the cerium dioxide quantum dots can accelerate the conversion of the positive electrode telluride and relieve the shuttle effect; the cerium dioxide quantum dots have excellent sodium affinity, can make sodium uniformly deposit, and inhibit dendrite growth. High-loading-capacity tellurium / cerium dioxide / carbon composite positive electrode materials and dendrite-free sodium / cerium dioxide / carbon composite negative electrode materials can be obtained, and a sodium tellurium battery with excellent performance is obtained.

This invention belongs to the technical field of solid waste resource utilization and CO2 adsorption materials, and relates to a method for preparing a derived nano-calcium-based CO2 adsorbent from shellfish waste. The method involves pretreating shellfish waste to obtain shell powder, preparing organic acid-modified carbon nanospheres from a soluble natural carbon source via a hydrothermal method, and then using a wet chemical method with the organic acid-modified carbon nanospheres as a template and the shell powder as a calcium source to allow the converted calcium carbonate to grow in situ on the carbon nanospheres to obtain a precursor. Finally, the precursor is prepared by calcination to obtain the derived nano-calcium-based CO2 adsorbent. This adsorbent has a temperature window of approximately 650–720 °C, an adsorption gas flow rate of 50–120 mL / min, and an adsorption capacity of 87.41% for various CO2 concentrations of 60–100%, with a decay rate controlled to approximately 13.44% after 10 adsorption cycles.

The invention discloses MOF (Metal Organic Framework)-derived hollow carbon nanospheres as well as a preparation method and application thereof. The preparation method comprises the following steps: dispersing surface-functionalized polymer microspheres in an organic solvent, adding a zinc-containing metal salt and an organic ligand, and constructing an MOF precursor shell layer on the surfaces of the polymer microspheres through an in-situ coordination reaction to obtain an MOF composite precursor with a core-shell structure; the obtained MOF composite precursor is subjected to pyrolysis treatment under the inert atmosphere condition, a hollow structure is formed through polymer microsphere decomposition, meanwhile, an MOF frame is carbonized to generate a porous carbon shell layer, zinc-containing metal salt is partially converted into ZnO nano-particles in the pyrolysis process, the ZnO nano-particles are evenly dispersed in the porous carbon shell layer, and the ZnO-doped hollow carbon nanospheres are obtained. The dielectric loss capability is remarkably improved while good impedance matching is ensured, so that the broadband and efficient electromagnetic wave absorption performance is realized, and the material can be applied to the field of electromagnetic wave absorption or electromagnetic protection.

The invention discloses a polyamide composite film for packaging a solid-state battery and a preparation method of the polyamide composite film, the film comprises four film layer structures which are a polyester layer, a barrier bonding layer, an EVOH barrier layer and a polyamide surface layer in sequence from top to bottom; wherein the components of the polyester layer comprise copolymerized polyester, silicone resin and carbon nanospheres, and the components of the barrier bonding layer comprise polyolefin hot melt adhesive resin and graphene; the EVOH barrier layer comprises the following components: EVOH and graphene; the polyamide surface layer comprises the components of polyamide and graphene. According to the polyamide composite film for solid-state battery packaging, the oxygen permeation amount and the water vapor permeation amount are obviously reduced, meanwhile, the good pit punching depth and heat conduction performance are achieved, the film has the excellent barrier performance, pit punching performance and size stability, the heat conduction performance and corrosion resistance are improved, and the service life of the film is prolonged. The aluminum-plastic film is especially suitable for an aluminum-plastic film protection layer for solid-state battery packaging.

The application provides an antistatic polyurethane resin and a preparation method and application thereof, and the antistatic polyurethane resin comprises a polyurethane resin, betel leaf carbon nanospheres and a solvent; and the preparation raw material of the polyurethane resin comprises a polyol, a chain extender, isocyanate and a catalyst. The antistatic polyurethane resin provided in the application has excellent antistatic property and heat resistance, is suitable for preparing antistatic polyurethane synthetic leather, and the preparation process of the antistatic polyurethane resin is simple, and the cost and energy consumption are low.

The application discloses a preparation method of a double-shell molybdenum carbide / carbon nanosphere composite wave-absorbing material, which comprises the following steps: preparing molybdenum glycerate nanospheres, preparing polydopamine precursor nanospheres, preparing double-shell hollow structure Mo2C / C nanospheres, and detecting wave-absorbing performance, and the like. Advantages of the application are as follows: during the carbon thermal reduction process, the polydopamine is converted into a carbon skeleton while a reduction reaction occurs with the molybdenum glycerate nanospheres, a layered structure is formed while the molybdenum glycerate nanospheres are converted into molybdenum carbide and a carbon skeleton; a high carbon thermal reduction temperature improves the graphitization degree of the carbon skeleton, which is beneficial to enhancing the dielectric loss capacity of the composite material; the air stored in the double-shell hollow structure improves the inherent impedance of the material; the double-shell hollow structure forms a network structure for confining incident electromagnetic waves, enhances multiple reflection attenuation of the incident electromagnetic waves, and forms a main electromagnetic energy consumption area in the carbon shell, thereby improving electromagnetic energy loss and enhancing wave-absorbing performance.

The invention provides a negative plate and a secondary battery. The negative plate comprises a negative current collector and a negative active material layer coated on at least one side surface of the negative current collector, and the negative active material layer comprises a negative active material and an ionic conduction auxiliary agent; the ionic conduction auxiliary agent comprises at least one of oxidized carbon black and oxidized carbon nanospheres, the ionic conduction auxiliary agent comprises an oxygen-containing group, and in a Fourier transform infrared absorption spectrum of the ionic conduction auxiliary agent, a C-H stretching vibration peak appears at 2930-2990cm <-1 >, and a C-O stretching vibration peak appears at 1020-1070cm <-1 >; the mass percentage of oxygen element in the ionic conduction auxiliary agent is 4-20%. An efficient and continuous ion transmission network is constructed in the negative plate provided by the invention, so that the rapid charging performance and the low-temperature performance of the secondary battery are jointly improved.

The application relates to a silver-doped hollow carbon nanosphere electrochemical probe and a preparation method thereof, and belongs to the technical field of electroanalysis chemical detection and carbon nanomaterials. The Ag@HCS composite material is prepared by using a SiO2 template method, polymerizing formaldehyde and m-diphenol to form a phenolic resin ball in the presence of silver nitrate, and then performing carbonization treatment and in-situ reduction of silver and removing the template. The Ag@HCS is used for HbA 1c The determination of HbA 1c is realized based on the silver-based electrochemical oxidation signal of the electrochemical probe after the modification of the nucleic acid aptamer. Experiments show that the electrochemical sensor constructed by the method has high sensitivity, a wide detection range, high specificity and good stability, and exhibits good feasibility in the detection of actual samples, and the method provides a method for synthesizing a stable, controllable and sensitive electrochemical probe.

This invention provides a carbon sphere composite material loaded with macrocyclic conjugated molecules, belonging to the field of microplastic pollutant detection technology. The composite material comprises phthalocyanine iron molecules and carbon nanospheres, with the phthalocyanine iron molecules uniformly modified on the surface of the carbon nanospheres. An electrochemical sensor constructed using this composite material can achieve specific recognition of bisphenol A (BPA), enabling rapid detection of BPA within a low concentration range. It exhibits a low detection limit, good linear sensitivity, and high stability, effectively reducing the detection cost and improving detection efficiency for BPA. This invention also provides a method for preparing the carbon sphere composite material loaded with macrocyclic conjugated molecules and its applications.

The invention relates to the technical field of electrocatalysts, in particular to a platinum-based electrocatalyst and a preparation method and application thereof.The platinum-based electrocatalyst is a Pt active site loaded hollow carbon nanosphere (HCS), on the basis, the platinum-based electrocatalyst is coated with a graphene oxide layer, the coating layer induces compressive strain of a Pt (111) crystal face through thermal reduction shrinkage, and the Pt active site loaded hollow carbon nanosphere is obtained. And a composite structure with enhanced activity and stability protection is formed. The preparation method comprises the following steps: step 1, preparing microporous hollow carbon nanospheres (HCS); and step 2, preparation of the Pt-based electrocatalyst. Platinum nanoparticles are loaded on hollow carbon spheres to obtain a platinum-containing catalyst precursor with high catalytic activity, graphene oxide (GO) shrinks in the thermal reduction process to form a reduced graphene oxide (rGO) layer, lattices are induced on the surfaces of platinum active sites in the shrinkage process to generate compressive strain, so that the center of a d band of platinum is shifted upwards, and the platinum-containing catalyst is obtained. The adsorption energy of an oxygen reduction reaction (ORR) intermediate is improved, the reaction energy barrier is reduced, and the catalytic intrinsic activity is improved.

This invention discloses a hollow carbon nanosphere electrocatalyst supported by a double-thin-layer polyphthalocyanine, its preparation method, and its application, belonging to the field of electrocatalytic materials technology. The electrocatalyst comprises hollow carbon spheres and metal polyphthalocyanine nanosheets supported on the inner and outer walls of the hollow carbon spheres; the metal polyphthalocyanine nanosheets are prepared by electrolysis of a metal polyphthalocyanine compound; wherein the metal elements in the metal polyphthalocyanine nanosheets supported on the inner and outer walls are different. This invention employs an effective stepwise self-assembly strategy, ensuring that the catalytic sites of the metal elements with ORR and OER activities are uniformly distributed on each side of the hollow carbon nanosphere shell, balancing the competition between the rate-limiting steps of ORR and OER. As an air cathode for a rechargeable zinc-air battery, it achieves excellent energy efficiency and cycle stability.

This invention relates to the field of lithium-sulfur battery technology, specifically to a TiO2 battery. 2‑x @NMC composite materials, their preparation methods, modified diaphragms, their preparation methods, and applications. This invention discloses a method for preparing NMC carbon nanospheres by dispersing colloidal silica in an acidic solution, adding an aniline monomer solution, and after the polymerization reaction is complete, purifying, drying, calcining, and etching the resulting product. The NMC carbon nanospheres are then ultrasonically mixed with a titanium source and calcined to obtain TiO2. 2‑x @NMC composite material; TiO 2‑x The @NMC composite material is mixed with a binder in an organic solvent, vacuum filtered, and coated onto the surface of a separator. After drying overnight, a modified separator is obtained. The modified separator of this invention can suppress the shuttle effect and improve the performance of lithium-sulfur batteries.

The application relates to a kind of heteroatom doped multi-level pore carbon nanospheres and a preparation method thereof, and belongs to the technical field of new nano materials.The method is to use aromatic amine derivative as nitrogen source, simultaneously use cationic surfactant and silicon dioxide generated by hydrolysis of silicate as soft and hard template agent, in-situ co-assemble polymer nanospheres by polymerization of aromatic amine derivative and silicon dioxide generated by hydrolysis of silicate, further remove hard template by high-temperature pyrolysis under inert atmosphere and hydrofluoric acid etching, to obtain heteroatom doped multi-level pore carbon nanospheres with microporous-mesoporous-macroporous pore structure, which can be further activated to increase its porosity.The method overcomes the shortcomings that pore structure of carbon material prepared by using only soft template is easy to collapse and hard template needs to be prepared in advance, and has the advantages of mild conditions, easy-to-obtain raw materials and low cost.Heteroatom doped multi-level pore carbon nanospheres prepared by the method have microporous-mesoporous-macroporous multi-level pore structure, high porosity and uniform distribution of heteroatoms.

The invention provides a catalyst and a preparation method and application thereof, and relates to the technical field of catalysts, the method comprises the following steps: (1) dispersing carbon nanospheres in a solvent, then adding tetrabutyl titanate and an ethanol water solution, and uniformly mixing to obtain titanium dioxide coated carbon nanospheres; calcining to obtain titanium dioxide hollow spheres; (2) dispersing the titanium dioxide hollow spheres in a solvent, adding the silicon dioxide nanoparticles, and uniformly mixing to obtain silicon dioxide coated hollow spheres; calcining to obtain a carrier; (3) dipping the carrier in a mixed solution containing chloroplatinic acid and nickel nitrate to obtain a precursor solution; sequentially filtering, drying and carrying out reduction reaction on the precursor solution to obtain the catalyst; the mass ratio of Pt to Ni in the mixed solution is (1-2): (1-2). According to the catalyst provided by the scheme, the cracking temperature in the polysilane cracking process can be reduced, the reaction time is further shortened, and the catalyst is low in cost and good in stability.

The invention belongs to the technical field of nano carbon material preparation, and particularly relates to a method for preparing hierarchical pore hollow carbon nanospheres by taking original biomass as a raw material through a one-step method, application and a supercapacitor electrode. The method comprises the following steps: step 1, raw material preparation: cleaning and drying at least one original biomass raw material, mixing with polytetrafluoroethylene (PTFE) powder according to a mass ratio of (1: 1)-(1: 5), and uniformly grinding to obtain mixed powder; the mixed powder is placed in a tubular furnace under inert atmosphere protection, the mixed powder is heated to 800-1000 DEG C at the heating rate of 1-10 DEG C / min, heat preservation is conducted for 1-6 hours at the temperature, and then the mixed powder is naturally cooled to the room temperature; and step 3, collecting a product: taking out the pyrolyzed product to obtain the hierarchical pore hollow carbon nanosphere, and applying the hierarchical pore hollow carbon nanosphere to a supercapacitor electrode material. The invention provides a method for preparing hierarchical pore hollow carbon nanospheres, which is simple in process, green and environment-friendly, and low in cost.