66 results about "Carbon nanosphere" patented technology

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 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 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 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.

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 degradable materials, and particularly relates to degradable foamed synthetic leather for footballs and a production process of the degradable foamed synthetic leather. The invention aims to solve the problems of insufficient rebound resilience and poor fatigue resistance of the existing degradable foaming synthetic leather. The preparation method comprises the following steps: carrying out hydrothermal treatment on alkali lignin to obtain carbon nanospheres, and carrying out carboxylation modification on the carbon nanospheres to obtain a reinforced filler; carrying out block polymerization reaction on the polyol monomer to obtain a bio-based elastomer; the preparation method comprises the following steps: dispersing a reinforcing filler in a waterborne polyurethane dispersion, adding an interfacial compatibilizer and a cross-linking agent, and blending step by step to obtain composite slurry; carrying out gradient foaming on the composite slurry to obtain a prefabricated foam body; and carrying out gradient curing on the prefabricated foam body, and carrying out infrared treatment to obtain the degradable foamed synthetic leather for footballs. The prepared degradable foaming synthetic leather for the football is high in mechanical strength and good in wear resistance, has degradability and is environmentally friendly.

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.

The application discloses a composite photocatalyst and a preparation method and application thereof. The preparation method of the composite photocatalyst comprises the following steps: 1) mixing carbon nanospheres, alkyl alcohol and alkyl titanate, adding an aqueous solution of the alkyl alcohol into the mixed solution to react, and obtaining a suspension; 2) heat-treating the suspension to prepare TiO2 hollow spheres; 3) adding a salt of a rare earth element, a salt of an iron-based element and carboxylic acid into water, adding an alkylene glycol and the TiO2 hollow spheres, and heating to prepare a gel; 4) heat-treating the gel to prepare TiO2 hollow spheres with a core-shell structure; and 5) sequentially adding the TiO2 hollow spheres with the core-shell structure and carbon quantum dots into a mixed alcohol of the alkylene glycol and the alkyl alcohol to react, and preparing the composite photocatalyst. The composite photocatalyst has a high visible light absorption rate and has a good performance of photocatalytic degradation of antibiotics.

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 discloses a kind of catalyst based on hollow silicon nanocapsule load and its preparation method, application, it is related to catalytic agent and organic synthesis field.Catalyst based on hollow silicon nanocapsule load preparation method includes: copper, palladium is loaded to carbon nanospheres, and intermediate is formed;Intermediate, CTAB, catalyst, tetraethyl silicate are mixed hydrolysis, calcine under inert atmosphere, 350~450 DEG C 1~4h, calcine in oxygen-containing atmosphere, 350~450 DEG C 2~8h, and catalyst based on hollow silicon nanocapsule load finished product is obtained.The catalyst of the application has large reaction area, and is active, can reduce the reaction temperature of morpholine or piperidine substitution reaction in the preparation process of aryl alpha ketone photoinitiator, and improve product yield.