41 results about "Carbon skeleton" patented technology

The invention discloses porous graphite and a preparation method thereof, an electrode and a battery, and relates to the technical field of new energy. The preparation method of the porous graphite comprises the following steps: providing liquid resin and a liquid aromatic polymer, mixing, and sequentially carrying out heat treatment, carbonization treatment, graphitization treatment and activation treatment to obtain the porous graphite. According to the preparation method of the porous graphite provided by the embodiment of the invention, the porous graphite is prepared by taking the liquid resin and the liquid aromatic polymer as raw materials, multiple reactions of curing and aging of the resin and combination of the resin and the aromatic polymer occur in the heat treatment process, and the porous graphite is prepared in the carbonization process. Aromatic polymer molecules are rearranged into an ordered carbon layer, and resin cross-linked molecules form a hard carbon skeleton; in the graphitization process, the ordered carbon layer forms a graphite-like carbon layer, and the order degree of the hard carbon skeleton is not changed; in the activation process, the graphite-like carbon layer is difficult to etch, the hard carbon skeleton participates in the reaction to form a pore structure, and finally the porous graphite is prepared.

The invention relates to the technical field of carbon material preparation, in particular to phenolic resin-based porous carbon and a preparation method thereof. The core of the preparation method of the phenolic resin-based porous carbon is that the mass ratio of phenolic aldehyde to phenolic aldehyde is optimized (1: (1-1.2)) to ensure sufficient crosslinking, and an amine catalyst is selected to reduce metal residues; meanwhile, terephthalaldehyde is introduced as a cross-linking accelerant, so that the bridging density and thermal stability of a resin network are effectively enhanced, and structural collapse is inhibited in subsequent carbonization; a sectional type carbonization process is further adopted, and the carbon skeleton is preserved by controlling the heating rate. According to the method, the carbonization yield is finally and successfully improved to 58% or above (improved by 15%-20% compared with that of a traditional method), the ash content is remarkably reduced (smaller than or equal to 0.2%), and an excellent material with a small mesoporous structure (the average pore diameter ranges from 2 nm to 10 nm) and a high specific surface area (larger than or equal to 1500 m < 2 > / g) is obtained.

The invention relates to the technical field of nano-materials, and discloses a heterogeneous diatomic nano-enzyme as well as a preparation method and application thereof. The invention provides a space confinement regulation and control strategy which is used for constructing a heterodiatomic catalytic center on a nitrogen-doped carbon skeleton and preparing nano-enzyme with structural stability and synergistic catalytic performance. According to the method, a confinement framework formed by self-assembly of first metal ions such as cobalt ions and second metal ions such as zinc ions and organic ligands is used as a template, third metal ions such as iron ions are introduced, and then carbonization heat treatment is performed in a protective gas atmosphere, so that bimetal sites with stable bridging configuration are formed in situ. The obtained nano-enzyme has the catalytic activity of various antioxidant enzymes, including catalase and remarkable superoxide dismutase activity, and has more excellent free radical scavenging capacity compared with a single-metal or non-bridging system.

The application provides a metal-carbon skeleton nano-microparticle and a preparation method thereof, and belongs to the field of nanometer material preparation, wherein the metal-carbon skeleton nano-microparticle is prepared from raw materials through a solvothermal reaction; the raw materials comprise, in percentage by mass, 3-15% of polymerizable monomers, 0.05-1.5% of initiators, 0.01-1.5% of metal salts and the balance of solvents; the active functional groups of the polymerizable monomers comprise nitrogen and / or oxygen; and the metal salts comprise at least one of aluminum salts, zirconium salts, chromium salts and zinc salts. The application uses metal ions and organic precursors containing active groups as raw materials, realizes controllable adjustment of the particle size of the nano-microparticles in the range of 1-5000 nanometers through metal crosslinking, induced nucleation and in-situ carbonization processes. The preparation process of the application is simple and controllable, the obtained nano-microparticles are uniform in size, stable in structure, high in temperature resistance and salt resistance, and can be widely applied in the fields of catalysis, sensing or oil displacement.

This invention belongs to the field of biomass materials technology, specifically relating to a titanium-doped biochar, its preparation method, and its applications. In this invention, supercritical fluid is used for composite processing. Its unique high diffusion and low surface tension characteristics enable uniform distribution of the titanium source within the protein fibers and induce condensation reactions between hydroxyl groups on the titanium surface and carboxyl groups in the protein fibers within the supercritical system, forming high-density Ti-O-C chemical bonds. Furthermore, low-temperature thermal induction is performed based on the supercritical pre-swollen matrix structure to complete the ordered reconstruction of the carbon skeleton structure and the regulation of active sites, achieving in-situ self-doping of N and S while avoiding the TiO2 phase transformation. This further improves the stability and photocatalytic performance of the titanium-doped biochar, enabling visible light response.

The present application provides a kind of coal tar macromolecular network model construction method based on HRTEM and XPS, belongs to chemical molecular reaction kinetics technical field, including S1: processing coal tar macromolecular sample HRTEM image data;S2: determine the element composition and functional group composition of coal tar macromolecular sample;S3: set the basic unit structure of coal tar macromolecular network model, and calculate the proportion of different unit structure;S4: construct the aromatic layer sheet of carbon skeleton unit in coal tar macromolecular network model;S5: set the bridge bond of carbon skeleton unit, finally obtain the complete carbon skeleton unit in coal tar macromolecular network model;S6: revise the edge of carbon skeleton unit, hydrogenation is added to carbon skeleton unit and the coal tar macromolecular network model is optimized.It can finely construct coal tar macromolecular network, restore the real composition of coal tar molecule to the greatest extent, ensure that subsequent calculation structure is more real, suitable for constructing macromolecular network model for coal tar obtained under different coal rank and different working conditions.

This invention provides a method for preparing graphyne with all rhombic molecular channels, comprising: S1 ultrasonically cleaning a copper foil in a hydrochloric acid solution to obtain a pretreated copper foil substrate; S2 placing the pretreated copper foil substrate in a double-necked flask containing a palladium catalyst, adding a reaction solvent, and refluxing to obtain an activated copper foil substrate; S3 adding a polybrominated benzene and a magnetic particle sequentially to another double-necked flask, placing the activated copper foil substrate in the flask, and then adding a reaction solvent to obtain a reaction system; S4 dissolving the polyyneylbenzene in the reaction solvent to obtain a first mixed solution, adding the first mixed solution to the reaction system for synthesis to obtain graphyne with all rhombic molecular channels. By using trisubstituted and hexasubstituted monomers for cross-coupling reactions, a two-dimensional conjugated carbon framework with all molecular channels being rhombic is precisely constructed, synthesizing a graphyne-like carbon material with all molecular channels being rhombic.

The invention relates to a metal organic carbon skeleton derivative composite material as well as a preparation method and application thereof. The metal organic carbon skeleton derivative composite material comprises a metal organic carbon skeleton and metal particles loaded on the surface of the metal organic carbon skeleton, the metal organic carbon skeleton comprises rare earth elements and an organic ligand; the metal organic carbon skeleton has a rod-like structure. A metal organic carbon skeleton provided by the invention comprises rare earth elements and can provide good wave-absorbing performance, a continuous three-dimensional conductive carbon network formed by mutual connection of rod-shaped structures can provide effective dielectric, and gaps, interfaces and holes formed among the rod-shaped structures can also significantly increase multiple reflection and scattering of electromagnetic waves, so that the wave-absorbing performance is improved. The dielectric size, the polarization mode and the loss mechanism of the material are synergistically promoted, and impedance matching is optimized, so that the wave-absorbing performance of the material is further improved.

The invention discloses a joint replacement full-stage self-adaptive Ag-DLC coating and a preparation method thereof, the coating comprises a bio-friendly substrate, a titanium bonding layer and an Ag-element-doped Ag-DLC functional layer, the Ag element in the functional layer is embedded in a DLC carbon skeleton in the form of Ag nanoparticles, the size of the Ag nanoparticles is 1-35 nm, and the doping amount is 2-40 at.%. According to the invention, the DLC coating with the nanocrystalline / amorphous composite structure characteristic is constructed by doping the Ag element with the anti-bond characteristic, so that the synergism of functions such as mechanical bearing, abrasion resistance, antibacterial property and biocompatibility can be realized. By means of controllable release of the Ag nanoparticles, self-adaptive response of functional characteristics of the metal joint implant in the whole service stage can be achieved, the requirements of the coating on the antibacterial performance and biocompatibility in the early postoperative stage can be met, and reliable anti-abrasion protection and osteogenesis promoting functions can be provided for the stable postoperative service stage.

The application provides a preparation method of carbon-metal composite material based on in-situ limited hot pressing, and belongs to the field of nanometer materials and preparation technology thereof.The preparation method comprises the following steps: firstly, providing a mixed solution containing a carbon source and a mixed solution containing metal salt; then mixing the mixed solution containing the carbon source and the mixed solution containing the metal salt under stirring, so that metal ions in the metal salt are coordinated with the carbon source; standing and separating the precipitate to obtain a precursor, wherein the metal ions in the precursor are dispersed in a coordinated manner and anchored around the carbon source; finally, performing hot pressing carbonization on the precursor, so that the precursor is subjected to limited densification and in-situ carbonization under the synergistic action of a thermal field and a pressure field, so that the carbon source is converted into a carbon skeleton with a three-dimensional pore structure, meanwhile, the metal ions are in-situ reduced and loaded on the carbon skeleton, and the carbon-metal composite material is obtained.The application also provides the carbon-metal composite material obtained based on the preparation method and application thereof.

The application discloses a kind of silicon-carbon negative electrode material and preparation method thereof, belong to negative electrode material technical field.The silicon-carbon negative electrode material includes: N-doped porous carbon, using polyimide-polyurethane-phenolic resin copolymer is obtained by carbonization;Nano silicon particles are loaded in the pore and / or surface of N-doped porous carbon;Amorphous carbon coating is coated on the surface of N-doped porous carbon and / or silicon nanoparticles.The application uses polyimide-polyurethane-phenolic resin by copolymerization strategy, polyimide segment, polyurethane segment and phenolic resin segment are copolymerized into molecular main chain, realize the uniform distribution of rigid segment (phenolic, polyimide) and flexible segment (polyurethane) at molecular level, and the introduction of polyurethane can solve the phase separation problem of phenolic, polyimide in prior art, ensure that the N-doped porous carbon pore obtained after carbonization is uniform, and the mechanical properties of carbon skeleton are consistent.

The application provides an iodine-doped starch-based carbon material and a preparation method and application thereof, and relates to the technical field of starch-based carbon materials. The method comprises the following steps: mixing starch, an iodine source and a water-soluble dispersant in a solvent, aging, drying and crushing to obtain a purple red to blue purple inclusion precursor; and then performing gradient carbonization treatment in an inert atmosphere to obtain the iodine-doped starch-based carbon material. The application realizes the inclusion and molecular-level anchoring through the van der Waals force between the spiral cavity of the linear starch and the iodine element, and relies on the water-soluble dispersant to form a physical encapsulation layer on the surface of the starch in situ in the low-temperature carbonization stage, cooperates with the high-temperature carbonization process, and inhibits the volatilization of the iodine element to realize the doping of high iodine content. The obtained material is characterized in that the iodine is embedded in the carbon skeleton in a P-pi conjugate state, the conductivity is significantly enhanced, the carrier concentration is improved, and the sodium ion storage capacity is improved, so that the reversible specific capacity is improved and the first circle coulombic efficiency is improved.

This composite material has a first structure or a second structure including a carbon material, particles containing iron group elements, and compounds containing alkali metal elements (alkali metal and / or alkaline earth metal). In the first structure, a large number of particles containing iron group elements and compounds containing alkali metal elements are dispersed in the carbon skeleton of the carbon material, the particles containing iron group elements contain iron group metal particles having a passivated particle surface, and the compounds containing alkali metal elements are present at least as oxides containing alkali metal elements and / or carbonates containing alkali metal elements. In the second structure, a large number of particles containing iron group elements are dispersed in the carbon skeleton of the carbon material, a large number of compounds containing alkali metal elements are collectively present on the surface of the particles containing iron group elements, the particles containing iron group elements contain iron group metal particles, and the compounds containing alkali metal elements are present at least as oxides containing alkali metal elements.

The invention provides a catalyst for synthesizing vinylene carbonate as well as a preparation method and application of the catalyst. The catalyst is prepared by compounding a nickel-zinc bimetallic nanosheet and a boron-doped carbon material. Compared with traditional nanoparticles, the nickel-zinc bimetallic two-dimensional nanosheet structure designed by the invention has the advantages that more active sites can be exposed, the mass transmission path is shortened, the diffusion of reactants and products is facilitated, and nickel and zinc bimetallic are uniformly dispersed in a boron-doped carbon matrix in a nanoscale, so that the performance of the nickel-zinc bimetallic composite material is improved. By utilizing the synergistic effect between nickel and zinc and the adjusting effect of nonmetal doping on the electronic structure of the carbon material, the catalytic activity can be remarkably improved, Ni and Zn are in atomic-scale close contact, electrons are partially transferred from Zn to Ni, the d electron orbit structure of Ni is finely adjusted, the dissociation adsorption energy of Ni to H2 molecules and the adsorption strength of Ni to reactant molecules are optimized, and the catalytic activity of the carbon material is improved. And boron atoms are doped into a carbon skeleton, so that the electronic property of the carbon material can be changed, and the catalytic reaction is facilitated.

This invention provides a multifunctional amphiphilic carbon dot, a nanofluid, its preparation method, and its application, belonging to the field of oilfield chemistry. The multifunctional amphiphilic carbon dot is obtained by a solvothermal reaction of a carbon skeleton precursor, a heteroatom source, a hydrophobic modifier, and a solvent. The carbon skeleton precursor is a small organic molecule containing carboxyl and / or hydroxyl groups that is easily carbonized. The heteroatom source is selected from organic compounds rich in nitrogen and / or sulfur atoms. The hydrophobic modifier is a surfactant with a long carbon chain of C8-C22. Through ingenious molecular structure design, this invention integrates amphiphilic oil displacement, heteroatom adsorption and corrosion inhibition, and quantum dot fluorescence tracing functions onto a single nanoscale carbon dot particle, constructing a "one-agent-multi-functional" intelligent nanofluid. This achieves efficient, safe, and intelligent synergy in the CO2 oil displacement process under complex reservoir environments.

The invention discloses a three-dimensional porous MXene derived heterojunction material, a composite material and a preparation method. The three-dimensional porous MXene derived heterojunction material has a rich pore structure and a three-dimensional carbon skeleton, has excellent conductivity and stability, is beneficial to sulfur loading, ensures uniform distribution of catalytic sites and inhibits the shuttle effect of polysulfide. According to the method, only a Ti source in MXene needs to be used for constructing a heterojunction, a carbon skeleton left after the MXene is converted into a three-dimensional structure is used as a conductive skeleton, the structural stability is considered, the MXene does not need to be prevented from being oxidized, and therefore the related steps of preventing the oxidation can be omitted. Spray drying is carried out firstly, then high-temperature heat treatment is carried out, and the preparation method is simple, short in period and high in yield. Compared with hydrothermal reaction in the prior art, high temperature and high pressure are not needed, and the safety performance is greatly improved.

This invention discloses a cobalt-based Fischer-Tropsch synthesis catalyst, its preparation method, and its application. The catalyst uses porous carbon framework particles as a support and, based on the total weight of the catalyst, comprises: 70%-85% carbon framework support, 10%-20% cobalt active component, 1%-2% NiO, and 3%-8% CaO. The achieved technical effects are as follows: by employing a porous carbon framework support with high thermal conductivity and high strength, the reaction hotspot temperature can be reduced by more than 50°C, effectively inhibiting cobalt particle sintering and extending the catalyst life by 2-3 times; the continuous, integrally formed carbon framework has a lateral compressive strength >80 N and a wear rate <2%, making it stable for use in fluidized bed reactors; and the introduction of CaO alkaline sites allows for the neutralization of organic acids, reducing the cobalt loss rate from 12% in traditional processes to below 3%, further extending the catalyst life by 30%-50%, significantly improving the catalyst's selectivity, stability, and service life.

The invention discloses a biomass-based porous carbon material as well as a preparation method and application thereof, and belongs to the technical field of preparation of porous carbon materials. The method comprises the following steps: dissolving a phosphorus source and a carbon source in a solvent, and drying to obtain a pyrolysis precursor; and carrying out temperature programming pyrolysis on the precursor in an air atmosphere to obtain the product. According to the method, a phosphorus source and carbon source synergistic carbonization system is constructed, and the dual effects that the phosphorus source forms a compact carbon layer to isolate oxygen at a low-temperature stage and forms a stable POC bond with a carbon skeleton at a high-temperature stage are utilized, so that stable carbonization of the biomass carbon source is successfully realized in an air atmosphere, and the dependence of a traditional process on an inert atmosphere is broken through. The prepared porous carbon material has excellent specific surface area and structural stability, and can be widely applied to the fields of electromagnetic wave absorption, pollutant adsorption, catalytic carriers and the like.

The invention discloses nitrogen-doped hierarchical porous biochar, which is obtained by taking biochar particles as a matrix and loading a nitrogen-containing functional group, and is characterized in that the nitrogen-containing functional group comprises pyridine-N, pyrrole-N and oxidized-N, and is added into a carbon skeleton structure of the biochar in a C-N bond combination manner. The biomass charcoal disclosed by the invention has a rich multi-graded pore structure, and has the advantages of wide adsorption range on antibiotics, high adsorption efficiency and the like.

The invention relates to a porous spherical structure of an active charcoal sphere, which comprises a plurality of carbon particles and a spherical multi-size particle irregular accumulation structure in a micron scale, and the carbon particles respectively comprise a corresponding layered edge structure and a corresponding surface hierarchical structure. The multi-size particle irregular accumulation structure comprises a carbon skeleton which is formed by accumulating and connecting the carbon particles, and the accumulated fragment carbon particles additionally form a plurality of intergranular gaps; the pore structure is formed by communicating the intergranular gaps, the pore structure comprises an interface structure, the interface structure is formed by a plurality of layered edge structures through multi-layer non-uniform accumulation, and the layered edge structures are in irregular shapes; and a plurality of small particles which are discretely attached to the carbon particles.

The application provides a vinylene carbonate synthesis catalyst and a preparation method and application thereof, and is composed of a nickel-zinc bimetal nanosheet and boron-doped carbon material. The nickel-zinc bimetal two-dimensional nanosheet structure designed in the application can expose more active sites compared with traditional nanoparticles, shorten the mass transfer path, and be beneficial to the diffusion of reactants and products. The nickel and zinc bimetal are uniformly dispersed in the boron-doped carbon matrix in a nanoscale, can utilize the synergistic effect between nickel and zinc and the adjustment effect of nonmetal doping on the electronic structure of carbon material, significantly improve the catalytic activity, the Ni and Zn atoms are closely contacted at an atomic level, the electrons are partially transferred from the Zn to the Ni, the d electron orbital structure of the Ni is finely adjusted, the dissociation adsorption energy of the H2 molecule and the adsorption strength of the reactant molecule are optimized, the hydrogenation / breaking bond reaction is more prone to occur, the boron atoms are doped into the carbon skeleton, the electronic properties of the carbon material are changed, and the catalytic reaction is facilitated.

The invention belongs to the technical field of biomass materials, and particularly relates to titanium-doped biochar as well as a preparation method and application thereof. According to the method, the supercritical fluid is adopted for compounding, uniform distribution of a titanium source in the protein fiber can be achieved through the specific high diffusion and low surface tension characteristics of the supercritical fluid, a condensation reaction of titanium surface hydroxyl and protein fiber carboxyl in a supercritical system is induced, and high-density Ti-O-C chemical bonding is formed; on the other hand, low-temperature thermal induction is performed on the basis of a supercritical pre-swelling matrix structure, ordered reconstruction of a carbon skeleton structure and regulation and control of active sites are completed, N and S in-situ self-doping is achieved, meanwhile, TiO2 phase structure transformation is avoided, the stability and photocatalytic performance of the titanium-doped biochar are further improved, and visible light response is achieved.

The invention discloses sulfur-doped porous carbon, a phosphorus-carbon composite material and application thereof, and belongs to the technical field of carbon material preparation. The preparation method comprises the following steps: providing a carbon source, wherein the carbon source is one or a mixture of more than two of ion exchange resin or ionic liquid; performing high-temperature pore forming on the carbon source in a CO2 / non-reaction gas mixed atmosphere; the preparation method comprises the following steps: preparing a sulfur-containing organic compound, introducing pyrolysis gas of the sulfur-containing organic compound, carrying out high-temperature vulcanization, and finally carrying out low-temperature treatment at 150-450 DEG C to form a C-S covalent bond and a stable thiophene structure. According to the preparation method, chemical combination of a carbon skeleton and sulfur is increased, uniform doping of sulfur in porous carbon is achieved, and the problems that in the prior art, sulfur doping distribution is not uniform, and combination of the carbon skeleton and sulfur is not firm are effectively solved. Moreover, the deposition efficiency of phosphorus is enhanced, the deposition uniformity of phosphorus in porous carbon is promoted, and the dynamic performance of phosphorus carbon is improved, so that the electrochemical performance of the secondary battery is improved.

This invention discloses a bimetallic co-doped carbon-based nanozyme, its preparation method, and its applications, belonging to the fields of nanomaterials and biomimetic enzyme technology. Using tannic acid and melamine as carbon and nitrogen sources, and introducing iron and manganese salts, this invention successfully prepared an iron-manganese bimetallic co-doped carbon-based nanozyme through a simple mixing, evaporation, and high-temperature calcination method. The resulting nanozyme exhibits an ultrathin nanosheet structure, with Fe and Mn elements uniformly dispersed within the carbon framework. This nanozyme demonstrates significantly enhanced laccase-like activity, with a specific activity reaching 3.4 U / mg, 6.8 times that of natural laccase from Trametes versicolor, and exhibits excellent pH and temperature stability as well as high substrate affinity. The preparation method of this invention is simple, low-cost, and easily scalable. This bimetallic co-doped carbon-based nanozyme has broad application prospects in the fields of catalytic degradation and colorimetric detection and analysis of organic pollutants.

The invention discloses a monatomic catalyst and a preparation method and application thereof, and relates to the technical field of catalyst preparation, the monatomic catalyst comprises a catalyst carrier, and tungsten carbide and metal monatomic loaded on the surface of the catalyst carrier; wherein the catalyst carrier comprises a carbon skeleton; the metal single atoms comprise at least one of an iridium single atom, a ruthenium single atom, a rhodium single atom and a platinum single atom. Wherein the tungsten carbide and the metal monatomic have strong interaction, so that the metal atom replaces the position of part of tungsten in the tungsten carbide to form a bond with carbon, the energy band structure of the metal monatomic is changed, and the adsorption effect of the catalyst on an intermediate generated in the alkaline cathode hydrogen evolution process and the acting force of the catalyst and an electrolyte are enhanced; the activity and the catalytic efficiency of the catalyst are improved, and the electrolysis energy consumption is reduced; the metal catalyst is loaded on the carrier in a monatomic form, so that the metal utilization rate is increased, and the metal dosage is reduced.

The application discloses a kind of high-thermal-conductivity porous carbon skeleton materials and preparation method and application thereof, belong to the technical field of heat-conducting composite material.The method comprises the following steps: immerse C / C composite material in phenolic resin precursor solution containing expandable microspheres, carry out vacuum impregnation treatment, obtain impregnated composite material;Impregnated composite material is sequentially subjected to mold foaming treatment, heating curing treatment, normal pressure drying treatment, carbonization treatment, chemical vapor deposition treatment and high-temperature heat treatment, and high-thermal-conductivity porous carbon skeleton material is prepared;Wherein, expandable microspheres are acrylic polymer microspheres containing closed liquid alkane gas.By thermoplastic foaming, multi-level pore structure is accurately constructed, combined with chemical vapor deposition and high-temperature graphitization treatment, active regulation of carbon skeleton pore size and high-order crystal structure are realized, and the contradiction that traditional porous carbon material is difficult to consider high specific surface area and high mass transfer is solved, and the thermal conductivity and structural designability are significantly improved.

The invention provides a metal carbon framework material as well as a preparation method and application thereof. The preparation method of the metal carbon framework material comprises the following steps: S1, mixing and stirring a metal salt solution, biochar and a culture solution containing ferribacterium gallisei, culturing under a micro-aerobic condition, and fixing a metal compound on the surface of the biochar by utilizing the ferribacterium gallisei to obtain a metal-coated biochar material; and S2, calcining the metal-coated biochar material obtained in the step S1 at 800-1100 DEG C to obtain the metal carbon skeleton material.

The application discloses a kind of hierarchical porous carbon materials and preparation method and its application in preparation N-C-N bond containing compound for preparation.The hierarchical porous carbon material of the application includes Zn-N3 single atom and nitrogen-doped carbon skeleton, and the Zn-N3 single atom is supported on the nitrogen-doped carbon skeleton;The nitrogen-doped carbon skeleton includes three-dimensional open ordered hierarchical porous structure, and the hierarchical porous structure includes at least 2 or 3 of macropore, mesopore and micropore.The hierarchical porous carbon material of the application has highly dispersed Zn-N3 single atom, which can provide moderate catalytic activity, avoid alcohol, amine excessive oxidation and other side reactions, so as to efficiently synthesize N-C-N bond containing compound.

The invention provides an N and S co-doped porous carbon material as well as a preparation method and application thereof. The N, S co-doped porous carbon material comprises a carbon skeleton and a carbon nanosheet coating the carbon skeleton. The carbon skeleton has a hollow tubular structure, and the carbon skeleton and the carbon nanosheets have pore structures. The carbon skeleton is doped with N and S, the carbon nanosheet is doped with N, and the relation that SSA * X * Y is larger than or equal to 890 and smaller than or equal to 3840 is met. Wherein X = (Dv90-Dv10) / Dv50, SSA is the numerical value of the specific surface area of the N and S co-doped porous carbon material, and Y is the numerical value of the total pore volume of the N and S co-doped porous carbon material. The N and S co-doped porous carbon material is doped with N and S, the specific surface area and the total pore volume are relatively large, the pore performance of the porous carbon material is relatively good, and the N and S co-doped porous carbon material has a very good application prospect.

The invention discloses a synthesis method of 8-methylnonanoic acid, which takes halogenated isobutane and 1-bromo-6-chlorohexane as raw materials, and comprises the following steps: converting the halogenated isobutane into an organic metal reagent, and coupling the organic metal reagent with the 1-bromo-6-chlorohexane under the catalysis of transition metal salt to obtain chlorinated isodecane; and oxidizing chloromethyl at the tail end of the chloro-isodecane into carboxyl to obtain 8-methylnonanoic acid. The reaction activity difference of bromine and chlorine is utilized, a target carbon skeleton is constructed in one step through direct selective coupling, terminal oxidizable sites are reserved at the same time, active functional groups such as carboxyl do not need to be protected and deprotected, synthesis steps are simplified, and harsh reaction conditions and use of expensive reagents are avoided. The method is safe, simple and convenient to operate, the obtained 8-methylnonanoic acid is high in purity and ideal in yield, and an economic, green and efficient intermediate synthesis scheme is provided for industrial production of dihydrocapsaicin.