522 results about "Mesoporous carbon" patented technology

The invention provides a sodium ion battery, an energy storage device and an energy storage system. The sodium ion battery comprises a positive pole piece, a diaphragm, a negative pole piece and an electrolyte, the negative pole piece comprises a carbon material, the specific surface area of the carbon material is x, the carbon material comprises mesopores, the number percentage of the mesopores in the carbon material is y, and the electrolyte comprises an organic solvent, an electrolyte salt, an organic additive and a sodium salt additive, the organic solvent comprises cyclic carbonate and chain carbonate, the mass fraction of the cyclic carbonate in the electrolyte is a, the mass fraction of the chain carbonate in the electrolyte is b, the mass fraction of the organic additive in the electrolyte is c, and the mass fraction of the sodium salt additive in the electrolyte is d; the sodium ion battery meets the relational expression of 0.4 < = a / y < = 0.8; 0.5 < = a / b < = 1.3; 0.4 < = c / x < = 1.2; and 0.1 < = d / c < = 0.5.

The invention relates to the technical field of mesoporous carbon material preparation, in particular to a high-temperature mesoporous carbon preparation method which comprises the following steps: S1, mixing a metal halide and an inorganic hydrogen bond donor, and heating and stirring until a solution is clear to obtain an inorganic eutectic solvent; s2, mixing the inorganic eutectic solvent and a biomass raw material for reaction; s3, filtering and washing the material obtained in the step S2; and S4, carbonizing the material obtained in the step S3 in a high-temperature inert atmosphere to obtain the high-temperature mesoporous carbon. According to the method, the wood fiber biomass such as the lowest-value straw, the lowest-value bamboo and the lowest-value wood dust is directly used as raw materials, component separation does not need to be conducted on the wood fiber biomass, and high-value utilization of a large amount of low-value wood fiber biomass can be achieved. The method is relatively simple in process, relatively mild in condition and relatively high in product yield, and an activating agent does not need to be used. The biomass mesoporous carbon prepared by the method also has a high specific surface area in a huge mesoporous volume state, and the specific capacitance in an alkaline electrolyte exceeds 260F / g.

The invention discloses high-stability mesoporous carbon as well as a preparation method and application thereof. The preparation method of the mesoporous carbon comprises the following steps: taking resorcinol and formaldehyde as raw materials, and performing condensation reaction under an acidic condition to obtain a phenolic resin precursor solution; uniformly adding a template agent into the phenolic resin precursor solution, standing to complete sol-gel conversion, and drying to obtain solid gel; carrying out carbonization treatment on the solid gel under an inert gas condition; and washing and drying in vacuum to obtain the mesoporous carbon material. According to the invention, high-purity resorcinol is adopted as a raw material, so that the influence of impurities on a mesoporous structure and material performance is reduced, and the thermal stability and structural stability of mesoporous carbon are improved; the pore size distribution is accurately and flexibly controlled by adding the template agent, and the pore size structure is adjusted, so that the specific surface area of the mesoporous carbon is increased.

The invention provides a cerium oxide-loaded mesoporous carbon sphere material and a preparation method and application thereof, and belongs to the technical field of cerium oxide composite material preparation, and the preparation method comprises the following steps: carrying out a hydrothermal reaction on cerium salt under the action of an alkaline mesoporous carbon sphere aqueous solution to obtain a mixed solution; the mass fraction of the mesoporous carbon spheres in the mixed solution is 1-4 wt%, and the concentration of the cerium salt is 0.04-0.06 mol / L; and carrying out centrifugal washing on the obtained mixed solution, and carrying out vacuum drying to obtain the cerium oxide loaded mesoporous carbon sphere material. The mesoporous carbon sphere has a large specific surface area and a uniform pore structure, the pore structure of the mesoporous carbon sphere is very close to the diameter of the short rod type CeO, and the short rod type CeO can be embedded into the pore of the mesoporous carbon sphere due to the size matching, so that tight physical contact is formed; meanwhile, hydroxyl groups on the surfaces of the carbon spheres and oxygen vacancies on the surfaces of the CeO particles can form stable covalent bonds, so that the bonding strength of the cerium oxide-loaded mesoporous carbon spheres is improved, and the service life of the cerium oxide-loaded mesoporous carbon spheres is prolonged.

A method for fabricating carbon cryogel exhibiting high surface area, an increased mesopore ratio, and cost-efficiency, utilizing biomass-derived, low-cost tannin and formaldehyde. Furthermore, this method incorporates calcium salt as a catalyst, a deviation from the widely used sodium carbonate. The resulting carbon cryogel possesses high surface area, an enhanced mesopore ratio, and improved sulfur loading capacity, rendering them ideal sulfur hosts for Li—S batteries. The present method disclosed herein constitutes a significant improvement over the existing state-of-the-art carbon cryogel for Li—S batteries, with potential implications for the progression of high-performance, cost-effective Li—S batteries.

The invention relates to an external composition for hair growth regulation and a preparation method thereof, and belongs to the technical field of cosmetics and medicines. The composition disclosed by the invention comprises nano mesoporous carbon for enhancing permeation, various surface functional modifications on the nano mesoporous carbon, minoxidil, protein fragments, polypeptides, oligopeptides, amino acids, dutasteride, bimatoprost, traditional Chinese medicine extracts, vitamins, caffeine, nucleosides, growth factors and various auxiliary functional components. Wherein the pore diameter of mesopores of the nano mesoporous carbon for enhancing permeation is 2-30 nm, the total pore volume of the mesopores is 1.5-3.5 cm < 3 > / g, and the particle size of the nano mesoporous carbon is 50-200 nm. The prepared nano mesoporous carbon is granular, controllable in size, stable in structure, free of irritation to skin, capable of keeping inert to various active ingredients in the composition, capable of enhancing absorption and permeation of other ingredients on the skin, wide in application range, capable of compounding various types of active ingredients and high in biological safety.

The invention relates to a hollow mesoporous carbon sphere prepared based on a confinement polymerization method and a preparation method of a platinum alloy catalyst loaded by the hollow mesoporous carbon sphere and doped with rare earth metal. The method comprises the following steps: by taking mesoporous silica as a template, introducing an initiator and a small molecular organic matter precursor into mesopores, and carrying out confinement polymerization in the mesopores to obtain a silica / polymer composite; carrying out high-temperature calcination and etching treatment on the complex to obtain hollow mesoporous carbon spheres; the carbon sphere is used as a carrier to load a platinum alloy doped with rare earth metal. The hollow mesoporous carbon spheres prepared by the method have good spherical morphology and mesoporous channels and high specific surface area, and the problems of non-uniform morphology, unobvious mesopores and the like in a traditional method are solved. After platinum alloy particles doped with rare earth metal are loaded on the carbon spheres, the problems of agglomeration, wide particle size distribution, poor performance and the like of the platinum alloy particles are solved.

The invention relates to the technical field of preparation of nano catalytic materials, in particular to a preparation method of hierarchical pore channel mesoporous carbon loaded metal nanoparticles. According to the invention, biomass diatomite is used as a template to construct a vertically through macroporous channel, a block copolymer is introduced to form an ordered mesoporous structure, and a pore-foaming agent is added to generate a macro-pore network in a pyrolysis process, so that a macro-pore-mesoporous-micropore three-level communicated carbon-based skeleton is realized; and a bimetallic component is loaded on the hierarchical porous mesoporous carbon in a gradient confinement manner. The material disclosed by the invention has the advantages of fast mass transfer of macropores, stable nanoparticles of mesoporous confinement and efficient catalysis of monatomic sites, and can efficiently catalyze and degrade various wastewater organic pollutants in a wide pH range.

The invention belongs to the technical field of new energy, and particularly discloses a catalyst for catalyzing conversion of glucose into 5-hydroxymethylfurfural and a preparation method of the catalyst. The method is used for solving the problem of low HMF selectivity in the process of converting glucose into HMF. The preparation method comprises the following steps: firstly, synthesizing hollow mesoporous silicon spheres in the presence of absolute ethyl alcohol by taking hexadecyl trimethyl ammonium bromide as a structure-directing agent, ammonia water for providing an alkaline environment and tetraethyl orthosilicate as a silicon source of silicon dioxide; then, filling sucrose serving as a carbon source into the hollow meso-porous silicon spheres, and carbonizing and removing silicon to obtain meso-porous carbon microspheres; and finally, dipping the mesoporous carbon microspheres in a tin tetrachloride pentahydrate solution to prepare the tin-loaded mesoporous carbon microsphere catalyst. The catalyst has a large specific surface area, an excellent pore structure and good hydrothermal stability, has two acidic sites of Lewis acid and # imgabs0 # acid at the same time, and can efficiently catalyze conversion of glucose into HMF.

The invention discloses a long-circulation silicon-carbon negative electrode material as well as a preparation method and application thereof, and belongs to the technical field of negative electrode materials. The method comprises the following steps: firstly, carrying out liquid-phase atomized magnesium doping modification on a mesoporous carbon material, then efficiently depositing nano silicon by utilizing a vapor deposition technology, and carrying out gradient carbon layer coating on the basis to finally prepare the long-circulation silicon-carbon negative electrode material. The material is of a mesoporous core-shell structure, the diameter is 1-20 microns, and the material is mainly applied to the field of negative electrodes of lithium ion batteries or lithium ion capacitors. The cycling stability of the silicon-carbon negative electrode material is remarkably improved, the conductivity is improved through magnesium doping, so that the overall electrochemical performance is improved, and meanwhile, the preparation process is simple, convenient and feasible, and is suitable for industrial production.

The invention relates to the technical field of microsphere materials, in particular to microspheres and derivatives thereof, including phenolic resin-based hollow mesoporous carbon materials (hollow mesoporous carbon microspheres) and core-shell silicon dioxide microspheres as well as a preparation method and application thereof. The preparation method of the microspheres comprises the step of reacting resorcinol and aldehyde in a solvent in the absence of a surfactant in a system by taking ammonia water as a basic catalyst, when the molar ratio of the reaction amount of the aldehyde to the resorcinol is (0.5-1): 1, adding tetraethyl silicate to obtain microspheres; and carbonizing the microspheres and removing the silicon dioxide to obtain the phenolic aldehyde-based hollow mesoporous carbon microspheres. The preparation method provided by the invention can be used for preparing the hollow large mesoporous carbon microspheres under the reaction condition of no surfactant.

The invention provides a PtCo-based composite catalyst and a preparation method and application thereof.The PtCo-based composite catalyst comprises a carrier and a load, the carrier comprises mesoporous carbon, the load comprises platinum-cobalt-based metal particles and a compound with the chemical formula being HxMO3, and M comprises W or / and Mo; a contact interface exists between the platinum-cobalt-based metal particles and the compound with the chemical formula of HxMO3; the platinum-cobalt-based metal particles comprise a first part of the platinum-cobalt-based metal particles, and the first part of the platinum-cobalt-based metal particles are supported in the mesoporous structure of the mesoporous carbon. According to the PtCo-based composite catalyst, a contact interface exists between HxMO3 and PtCo-based metal particles, the catalytic activity of platinum and cobalt can be improved, and reduction of oxygen on the surface of the catalyst is facilitated; part of platinum-cobalt-based metal particles are supported in a mesoporous structure of mesoporous carbon, so that the stability of the catalyst can be improved.

The invention discloses a preparation method and application of a high-nitrogen-doped ordered mesoporous carbon supported copper catalyst, and belongs to the technical field of catalyst preparation. The preparation method comprises the following steps: by taking cane sugar and a copper-nitrogen complex as raw materials, SBA-15 as a template agent and sulfuric acid as a catalyst, carrying out equivalent-volume impregnation, low-temperature heat treatment, 800-900 DEG C high-temperature carbonization and nitric acid / hydrofluoric acid demolding to prepare pyrrole nitrogen enriched or pyridine nitrogen enriched high-nitrogen doped ordered mesoporous carbon with a large specific surface area; the preparation method comprises the following steps: loading a copper species on high-nitrogen-doped ordered mesoporous carbon by adopting an equivalent-volume impregnation method, and reducing at 350-400 DEG C to prepare the high-nitrogen-doped ordered mesoporous carbon loaded copper catalyst. The prepared catalyst is high in nitrogen content, large in specific surface area, high in pyridine nitrogen or pyrrole nitrogen enrichment degree and uniform in copper particle dispersion and shows efficient catalytic performance in methanol oxidative carbonylation reaction, and the highest methanol conversion rate is 9.3%.

The invention is applicable to the technical field of mesoporous materials, and relates to an ultra-small single-mesoporous carbon nanoparticle and a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing a single micelle solution; (2) obtaining SiO2 nano particles; (3) obtaining the SiO2 (at) single micelle superstructure nano particles; (4) obtaining a compound of the SiO2 coated single micelle wrapped by the polydopamine; (5) obtaining a SiO2-loaded mesoporous carbon structure; the invention also discloses an application of the ultra-small single mesoporous carbon nanoparticles in a battery. The ultra-small single-mesoporous carbon nanoparticles and the preparation method thereof have the beneficial effects that the single-mesoporous carbon nanoparticles have a large specific surface area, ultra-small particle size, large aperture and a unique broken hole structure, active sites of chemical reaction are increased, a better substance transmission channel can be provided, potential safety hazards are reduced, and the service life of the single-mesoporous carbon nanoparticles is prolonged. And the assembled aqueous zinc ion battery has relatively high discharge specific capacity.

The invention relates to the technical field of mesoporous materials, and discloses an ordered mesoporous phenolic resin sphere, an ordered mesoporous carbon sphere and a preparation method and application thereof. The ordered mesoporous phenolic resin sphere has a uniform spherical morphology and a highly ordered mesoporous structure, the particle size of the ordered mesoporous phenolic resin sphere is 40-2000nm, and the aperture of the ordered mesoporous phenolic resin sphere is 3-10nm; the solid content reaches 100g / L. The preparation method comprises the following steps: dissolving a surfactant in a composite solvent, and uniformly stirring to obtain a precursor solution; dissolving a phenolic precursor and formaldehyde in the precursor solution, and slowly adding a pore-enlarging agent to obtain a uniform emulsion; adding a catalyst into the emulsion to carry out polymerization reaction; and after the reaction, collecting a solid phase, and carrying out heat treatment in an inert atmosphere to obtain the ordered mesoporous phenolic resin spheres. The ordered mesoporous phenolic resin spheres and the ordered mesoporous carbon spheres have uniform spherical structures, highly ordered mesoporous structures and high solid content; the preparation method is simple in process, high in expansibility and beneficial to large-scale production.

The invention discloses phenolic resin-based hollow mesoporous carbon microspheres based on accelerated condensation and a preparation method and application thereof, and belongs to the technical field of carbon material preparation, and the preparation method comprises the following steps: in the absence of a surfactant, resorcinol / formaldehyde and tetraethyl silicate react in a water / alcohol system at the temperature of 35-120 DEG C under the catalytic action of ammonia water to obtain phenolic resin-based hollow mesoporous carbon microspheres; and carbonizing the silicon dioxide coated phenolic resin / silicon dioxide microspheres, and removing silicon dioxide to obtain the hollow mesoporous carbon microspheres. The method is simple and convenient to operate, a surfactant does not need to be added, the prepared carbon microspheres have large mesopores and hollow structures, meanwhile, the morphology and the pore structure of the carbon microspheres can be effectively regulated and controlled, and the carbon microspheres are applied as electrode materials and have good electrochemical performance. The hollow mesoporous carbon microspheres can also be applied to the fields of electrode materials, molding compounds, adsorption materials, drug loading or catalysis.

The invention belongs to the technical field of CO2 adsorbents, relates to carbon-based solid amine, and discloses a preparation method of a carbon-based solid amine CO2 trapping adsorbent, which comprises the following steps: S1, dissolving organic amine in a methanol solution to form a methanol amine solution; s2, adding the mesoporous carbon-based carrier into the methanol amine solution, and stirring at a low speed to evaporate methanol; and S3, drying in a vacuum oven to obtain the carbon-based solid amine CO2 trapping adsorbent. The CO2 trapping adsorbent prepared by the invention has the advantages of large CO2 adsorption capacity, strong selectivity, good stability and reproducibility, effectively reduces the CO2 trapping cost, and has huge advantages in the aspect of carbon trapping.

The invention relates to a method for preparing a mesoporous carbon material by using non-charring plastic through a one-pot method, which comprises the following steps: uniformly mixing plastic and eutectic salt, carrying out carbonization reaction at 600-800 DEG C, soaking in olefine acid, washing with water, and drying to obtain the mesoporous carbon material. According to the method, non-charring waste plastic is used as a raw material, the mesoporous carbon material is prepared through a one-pot method, the process is simple, green and environment-friendly, the structure is controllable, and waste plastic treatment and high-value carbon material preparation can be achieved at the same time.

The invention provides a modified silicon-based negative electrode material as well as a preparation method and application thereof, and relates to the technical field of new energy battery negative electrodes. The preparation method provided by the invention comprises the following steps: dipping a boron-silicon substrate in a pre-lithium solution, evaporating a solvent to dryness, and calcining to obtain a modified substrate; growing silicon nitride nanowires on the surface of the modified matrix in situ to prepare a composite matrix; and reducing the composite matrix in a reducing atmosphere, and coating the surface with mesoporous carbon to prepare the modified silicon-based negative electrode material. The structure stability of the negative electrode material in the charging and discharging process can be effectively improved, the cycle performance reduction caused by the pulverization of the negative electrode material is avoided, and meanwhile, the first effect can be improved by performing pre-lithiation on the boron-silicon substrate.

The invention provides a residual oil derived nitrogen-doped carbon loaded small-size intermetallic compound catalyst. The residual oil derived nitrogen-doped carbon loaded small-size intermetallic compound catalyst comprises residual oil derived nitrogen-doped mesoporous carbon and an intermetallic compound loaded on the surface of the nitrogen-doped mesoporous carbon. The prepared residual oil derived nitrogen-doped mesoporous carbon with the carbon-rich network structure has rich pi sites, and a platinum-based binary intermetallic compound is loaded on the residual oil derived nitrogen-doped mesoporous carbon by a simple impregnation reduction method. The residual oil derived nitrogen-doped mesoporous carbon and a PtxMy intermetallic compound (M is Co, Fe and Cu) form a Pt-C bond, and the residual oil derived nitrogen-doped mesoporous carbon has a strong anchoring effect and an electron transfer effect on metal. The average size of intermetallic compounds in the catalyst is 2.5-5nm, and the catalyst has high platinum utilization rate and shows excellent activity and stability when applied to oxygen reduction reaction (ORR).

The invention provides a mesoporous silicon carbon negative electrode material and a preparation method and application thereof, and relates to the technical field of battery negative electrode materials, the mesoporous silicon carbon negative electrode material comprises a mesoporous carbon matrix and silicon; the mesoporous carbon matrix can be a spherical, spheroidic or irregular block, the mesoporous carbon matrix has mesoporous structures, and preferably, the mesoporous structures are in ordered distribution; according to the invention, the preparation of the uniform mesoporous structure is realized, the volume expansion of the silicon is effectively relieved, the close combination of the silicon and the carbon is realized by vapor deposition of the silicon on the mesoporous sphere carbon matrix material, and the cycling stability of the material is improved. According to the meso-porous silicon carbon negative electrode material provided by the invention, by optimizing the structural design of the material, the problems of silicon volume expansion, infirm interface bonding, complex preparation process and the like in the prior art are solved.

The invention discloses phenolic resin-based nitrogen-doped mesoporous carbon as well as a preparation method and application thereof. According to the invention, phenolic resin is used as a carbon source, mesoporous carbon is prepared through rapid carbonization and activation by using a template method and a high-temperature thermal shock technology, accurate regulation and control of nitrogen doping and mesoporous structures are realized in the process, and the specific surface area, conductivity and thermal stability of mesoporous carbon are improved; the electrochemical reaction activity and stability of the mesoporous carbon carrier are remarkably improved, and the problems of long activation time, non-uniform pore structure and the like of a traditional method are solved, so that the application range of the mesoporous carbon carrier in the fields of electrochemical energy storage and catalysis is widened.

The invention discloses a detection system and method for measuring trace Cr in tobacco, and relates to the technical field of tobacco detection.The system comprises a multi-stage dynamic digestion module, a two-channel solid-phase microextraction module, a high-resolution ICP-MS detection module, an intelligent data processing module, a collision reaction tank (CRC) based on the high-resolution ICP-MS module and a dynamic background correction algorithm. The detection limit of Cr is as low as 0.008 [mu] g / kg by combining the enrichment capacity of 50 times or more of two-channel solid-phase microextraction (DSPME), the detection limit is reduced by one order of magnitude compared with that of a traditional atomic absorption method (0.1 [mu] g / kg), the accurate determination requirement of trace Cr is met, the two-channel DSPME module is designed through physical isolation of amino magnetic nanoparticles (Cr (III) adsorption) and DTC mesoporous carbon (Cr (VI) adsorption), and the detection limit of the trace Cr is reduced by one order of magnitude compared with that of the traditional atomic absorption method (0.1 [mu] g / kg). And independent capture and elution of Cr (III) and Cr (VI) are realized.

The invention discloses a preparation method and application of a carbon dioxide hydrogenation catalyst, and belongs to the field of hydrogenation catalysis. The vanadium slag is used as a raw material, a leaching solution containing silicon, chromium and vanadium is obtained through sodium salt roasting, an aluminum source is added to remove the silicon element, meanwhile, an ordered mesoporous carbon material is added, and silicon and aluminum elements are converted into an ordered mesoporous composite oxide which is used as a hydrogenation catalyst carrier; an indium salt, a cerium salt and a nickel salt are dissolved in ethanol and mixed with the carrier for isopyknic impregnation to obtain the hydrogenation catalyst; and carrying out chromium and vanadium separation on the silicon-removed leaching solution to obtain chromium sesquioxide and the all-vanadium redox flow battery electrolyte. The catalyst has a regular pore structure, ordered mesopores provide a confinement effect, dispersion and anchoring of active components are facilitated, and the activity of the catalyst is remarkably improved.

A method of mesoporous carbon support production includes providing an active silica template from a self-assembling block copolymer (BCP) in a solution, the BCP including a diblock copolymer of polydimethylsiloxane (PDMS) as a majority block and a hydrocarbon polymer as a minority block in a predetermined volume fraction, the BCP being in a form of nanodroplets, drying and annealing the nanodroplets, ashing away the hydrocarbon polymer of the minority block to obtain the active silica template, applying a carbon precursor onto the active silica template, and removing the active silica template to obtain a mesoporous carbon support as a reverse image of the template.

The invention provides a heterostructure salinity difference energy conversion film based on HOF / two-dimensional mesoporous carbon as well as a preparation method and application of the heterostructure salinity difference energy conversion film. The salinity difference energy conversion film comprises a two-dimensional mesoporous carbon layer serving as a hydrophobic layer and a hydrogen bond organic framework layer which covers one surface of the hydrophobic layer and serves as a hydrophilic layer, wherein the two-dimensional mesoporous carbon layer is formed by compounding a two-dimensional mesoporous carbon material with regular nanopores and aramid nanofibers; the hydrogen bond organic framework layer is formed by compounding a hydrogen bond organic framework material and aramid nanofibers; the heterogeneous Janus structure salinity gradient energy conversion membrane is constructed by adopting a hydrogen bond organic framework and a two-dimensional mesoporous carbon material, and when the heterogeneous Janus structure salinity gradient energy conversion membrane is applied to salinity gradient energy conversion, high ion selectivity, high structural stability and high ion migration flux can be considered.

The invention discloses an asymmetric magnetic mesoporous carbon superstructure material as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) preparing Fe3O4amp; a SiO2 alcohol dispersion liquid; (2) preparing Fe3O4 < 4 > amp; the preparation method comprises the following steps: preparing a SiO2 (at) micro single micelle superstructure alcohol solution; (3) preparing Fe3O4 < 4 > amp; a SiO2 (at) C superstructure material; the specific surface area of the material is 87-116 m < 2 > / g, the aperture is 22.8-50 nm, and the length is 330-400 nm. The material is applied to catalytic degradation of organic dyes. The method has the beneficial effects that the surface chemical property is more active, the hydrophilicity and the catalytic degradation capability are stronger, the method is suitable for chemical catalytic degradation, the whole synthesis process is simple and convenient to operate, and intermediate byproducts cannot be generated to cause secondary pollution; in addition, in the dopamine carbonization process, high-temperature carbonization is carried out in nitrogen (inert atmosphere), and the operation is safe; by adjusting the type of the PS-PVP-PEO single micelle, accurate control of the mesoporous size can be realized, so that the PS-PVP-PEO single micelle is suitable for catalytic degradation of organic pollutants with different molecular weights, and selective catalytic degradation is realized.

The invention relates to the field of copper-clad plates, and particularly discloses a halogen-free flame-retardant epoxy resin copper-clad plate and a preparation method thereof. According to the copper-clad plate, an intumescent flame retardant is loaded on mesoporous silica to prepare a composite flame retardant, and the composite flame retardant and modified aluminum hydroxide are mixed for use. The preparation method has the beneficial effects that the intumescent flame retardant is loaded on mesoporous silica, a foam carbon layer structure formed after combustion can isolate air and heat conduction, a polymer main body is protected, and the purpose of flame retardance is achieved; meanwhile, modified aluminum hydroxide is introduced, and the aluminum hydroxide has good flame retardance and can promote generation of a carbon layer in the combustion process; on the other hand, silicon dioxide and aluminum hydroxide serve as inorganic filler, the mechanical property of the copper-clad plate can be improved, and the problem that the impact resistance is reduced due to introduction of the intumescent flame retardant is solved; meanwhile, the mesoporous carbon dioxide loaded flame retardant can fix the intumescent flame retardant in the resin, so that the mobility of the intumescent flame retardant is reduced, and the flame retardant property of the copper-clad plate is not reduced after long-term storage.

The present application relates to the technical field of nano-catalytic material preparation, in particular to a preparation method of multi-stage pore mesoporous carbon loaded metal nanoparticles, which constructs vertical and through macroporous channels by taking biomass diatomite as a template, forms ordered mesoporous structure by introducing block copolymer, and realizes macro-pore-mesopore-micropore three-stage communication of carbon-based skeleton by adding porogen to produce macro-porous network in the pyrolysis process, and gradientally limits and loads bimetallic components on the multi-stage pore mesoporous carbon. The material has the advantages of macroporous rapid mass transfer, mesoporous limited stable nanoparticles and single-atom site efficient catalysis, and can efficiently catalyze and degrade various wastewater organic pollutants in a wide pH range.

The invention discloses a nitrogen-doped multilayer rose-shaped hard carbon material as well as a preparation method and application thereof, and belongs to the technical field of battery materials. A precursor of the nitrogen-doped multi-layer rose-shaped hard carbon material is prepared by adopting a solid-liquid self-assembly method, and then the precursor is calcined, so that the final nitrogen-doped multi-layer rose-shaped hard carbon material can be obtained. The prepared nitrogen-doped porous carbon material has more mesopores and defects, is unique in structure and uniform in shape, and can be used as a sodium ion battery negative electrode material. The nitrogen-doped multilayer rose-shaped hard carbon material prepared by the invention is a material with immunity to environmental influence, belongs to a mesoporous carbon material with stable chemical components and controllable shape in the porous field, has the advantages of regular structure, relatively good stability and the like, and has the properties of high capacity, good rate and the like as a negative electrode material.