1266results about How to "Simple preparation process" patented technology

The invention relates to a two-dimensional fiber/boron nitride nanotube multistage reinforcement and a preparation method thereof. In the two-dimensional fiber/boron nitride nanotube multistage reinforcement, boron nitride nanotubes are uniformly distributed on the surface of two-dimensional fibers. The preparation method for the two-dimensional fiber/boron nitride nanotube multistage reinforcement is innovatively explored for the first time, and the desired two-dimensional fiber/boron nitride nanotube multistage reinforcement is prepared. The preparation method is simple; raw materials for the reinforcement are cheap, safe and easily available; and a foundation is laid for subsequent construction of a three-dimensional fiber/boron nitride nanotube multistage reinforcement and research and development of a multistage reinforced composite.

The invention relates to a nano silica dioxide heat-insulating material and a preparation method thereof, wherein the preparation method of the nano silica dioxide heat-insulating material comprises the steps of putting 60-100 wt% of nano silica dioxide powder, 0-35 wt% of reinforced fibre and 0-30 wt% of infrared opacifier in an enclosed stirrer after being mixed; and stirring at high speed by adopting a dry method to enable the mixture in the enclosed mixer to be dispersed evenly to prepare an unshaped heat-insulating material or a stereotyped heat-insulating material by mould pressing. By adopting the nano silica dioxide heat-insulating material is prepared by the preparation method of nano ilica dioxide heat insulating material, the un-shaped or stereotyped heat insulating material with excellent heat-insulating property can be prepared by uniformly mixing the nano silica dioxide powder, the reinforced fibre and the infrared opacifier in a proper proportion. The nano silica dioxide heat-insulating material has the advantages of simple preparation technology, easy operation, low preparation cost, wide application area and environment-friendliness.

The invention discloses a photosensitive resin combination and a method of preparing a quantum dot pattern from the photosensitive resin combination. The photosensitive resin combination is prepared from quantum dots which are dispersed in the photosensitive resin combination and are respectively provided with a modified layer. The method of preparing the quantum dot pattern from the photosensitive resin combination comprises the steps: with the photosensitive resin combination as a photoresist, carrying out coating, exposure and development to obtain the quantum dot pattern. The method of preparing the quantum dot pattern from the photosensitive resin combination has the advantage of being simple, the fine graph, the boding stability of the combination and a substrate, the difficulty in abscission, the high resolution and the like can be achieved. In addition, with the adoption of the method, based on existing equipment, the mass production of the quantum dot pattern can be realized, and the application potential of the quantum dots is greatly improved.

The invention provides a high active core-shell structure catalyst used for low temperature fuel cell. The preparation method comprises the following steps: adopting carbon powder or carbon nanotubesas carrier, coating single-layer or two-layer platinum which is reduced by reductant, on the metal-based core to form a core-shell structure and loading the structure on carbon powder or carbon nanotubes carrier. The catalyst has low platinum loading and high catalytic activity so that platinum loading is low, the activity of the catalyst is high; the contradiction between the cost and performanceof catalyst is effectively solved, and the high active core-shell structure catalyst plays an extremely important role in solving the current problems of the fuel cell.

The invention relates to an aqueous nano porous corrosion-resistant heat-insulated coating material and a preparation method for the corrosion-resistant heat-insulated coating material and particularly relates to an aqueous corrosion-resistant heat-insulated coating material, which has a nano porous structure, prepared through forming an aqueous-phase uniform three-dimensional-network nano porous structure by taking thixotropic colloid as a template agent and adding a film forming agent, a reinforcing powder material, a functional powder material and admixtures. The preparation method for the corrosion-resistant heat-insulated coating material, disclosed by the invention, is simple and easy in operation and low in production cost, is environment-friendly and safe and is beneficial to mass production. The nano porous corrosion-resistant heat-insulated coating material disclosed by the invention has excellent heat insulating and corrosion resisting properties and can be applied to the heat insulating and corrosion resisting of equipment such as high-temperature furnace hearths, pipelines and valves in the fields of aerospace and military industries, metallurgical forging, petroleum refining, electric power and the like, so that the safety of use and the level of energy saving and consumption lowering are improved.

The invention discloses a sound absorbing material preparation method, a sound absorbing material and a loudspeaker. The method comprises the following steps of preparing non-foamed material slurry, and mixing uniformly; performing reaction on the non-foamed material to form non-foamed sound absorbing material powder with the FER or MFI structure; performing heteroatom replacement on the non-foamed sound absorbing material powder; adding binder into the modified non-foamed sound absorbing material powder; shaping, drying and calcining the non-foamed sound absorbing material, and thereby obtaining the non-foamed sound absorbing material with a set grain size, wherein the mass ratio of silicon and aluminum in the non-foamed sound absorbing material is less than 200. The sound absorbing material is prepared by the non-foamed material, and the mass ratio of silicon and aluminum in the prepared non-foamed sound absorbing material powder is less than 200. The rear vocal cavity of the loudspeaker is filled with the sound absorbing material provided by the invention. The method is low in requirements on material category and grade and simple in technology; and the material prepared by the method is good in absorbing ability and slow in aging. The loudspeaker has good acoustic effect.

This invention discloses a complex carbon negative material of Li ionic batteries and its preparation method, in which, the material is natural graphite micro-powder, artificial graphite micro-powder or complex graphite particles of natural and artificial graphite micro-powder combined by binding agents, the hexagon carbon layers of graphite crystals are arrayed randomly, the particles include nm or sub-mum holes, the preparation method includes: mixed-prilling, extruding to molding, carbonized process or graphitized process, heating and cooling and crushing.

The invention discloses an aqueous flame-retardant and thermal-insulated coating and a preparation method thereof, relates to a building coating, and provides a building thermal-insulated coating integrating flame-retardant property, thermal-insulated property and decorative function. The coating consists of emulsion, a fire retardant, titanium, hollow glass beads, water and assistants, with the respective mass parts being 35-40, 20-30, 15-20, 5-10, 19-21 and 11-15. The coating uses fire retardants of inorganic type, phosphorus type and nitrogen type and utilizes synergistic action among different fire retardants to achieve the retardant effect with less amount and without influencing the physical properties of the coating layer; better thermal-insulated effect can be achieved when the thickness of the coating layer is about 1mm through obtaining thermal insulation property by reducing thermal conductivity, thermoconvection and thermal radiation through the glass beads; and the thermal-insulation and flame-retardant properties of the coating are reflected by that the heat conduction coefficient is not more than 0.090 w/(m.k), and the oxygen index is not less than 28.0 percent.

The invention relates to a catalyst for selectively deoxidizing oxides through ammonia, which mainly solves the problems that in the prior commercial NH3-SCR catalyst system, V2O5-WO3(MoO3)/TiO2 has high operating temperature and a narrow temperature window, N2 has low generation selectivity at high temperature, vanadium as an active composition has toxicity and harmfulness on environment and human body and the like. On the basis of a ferrotitanium composite oxide catalyst prepared in prior period, environment-friendly raw materials with cheap prices are continuously adopted; and other transition metal oxides are added into a ferrotitanium composite oxide catalyst system through a simple and feasible coprecipitation method to prepare a catalyst system with improved low-temperature activity. The catalyst is subjected to physicochemical property characterization by using a plurality of methods to show that an active phase of the catalyst is the same as that of a ferrotitanium composite oxide catalyst which is not doped with other transition metals, and is still in a microcrystal state, thereby forming a composite oxide microcrystal system with a Fe-O-Ti, M-O-Ti and Fe-O-M (M is a doped transition metal element) structure; and the composite oxide microcrystal system has special catalytic activity in SCR reaction. The catalyst has high NH3-SCR activity, selectivity and stability at a middle-low temperature period (between 150 and 300 DEG C), is unobvious in the poisoning effect of SO2; and if the catalyst is prepared into slurry and is coated on a honeycomb ceramic carrier, the catalyst is expected to be applied to the denitration and purification process of flue gas produced after desulfuration and dedusting in a coal-fired power plant or tail gas of a diesel engine.

The present invention is an aromatic-typed sustained releasing chlorine dioxide gelatum powder and the preparation method, which belongs to the technical field for gas disinfection. The present invention is applied to resolve the problem of stable releasing the chlorine dioxide disinfectant. The present invention comprises the material with the following weight, which comprises 8g to 24g chlorine dioxide precursor, 6g to 20g provocation agent with delayed release, 10g to 25g stabilizer, 10g to 24g colloid agent, 3g to 7g cross linking agent and 1g to 4g solid essence. Compared with the present technology, the present invention has the following advantages. Firstly, the preparation art is simple and the cost is cheap, also the application is effective and safe. Secondly, the chlorine dioxide gas can be released stably and the effective application period is long, which can reach 1month to 2 months. Thirdly, the product is stable with a long shelf life and a period of validity over 2 years. Fourthly, the air has a comfortable flavor after disinfection, which can realize double function of air disinfection and refreshing the air.

The invention discloses yttrium aluminum garnet fluorescent glass, a manufacturing method thereof and use thereof. The yttrium aluminum garnet fluorescent glass comprises a glass matrix of BaO-Na2O-B2O3-SiO2-Al2O3 and a yttrium aluminum garnet fluorescent powder component. The yttrium aluminum garnet fluorescent glass is manufactured by mixing initial components and yttrium aluminum garnet fluorescent powder, calcining the mixture and casting. The method has the advantages of simple preparation process, easy processing and forming, cheap raw material and large-scale industrial production. The YAG fluorescent powder is well matched with a blue InGaN chip, has the advantages of high luminescent efficiency, stable performance and the like and is the preferred yellow fluorescent material for packaging white LEDs. Indeed, the YAG fluorescent powder glass manufactured by sintering the YAG fluorescent powder in glass is a novel fluorescent material with high performance, low cost and wide application range.

The invention discloses a preparation method of a catalytic combustion catalyst. The method comprises the following steps: firstly, performing hydrothermal pretreatment on a honeycomb ceramic matrix; secondly, soaking the honeycomb ceramic matrix with alumina sol; and finally, loading additives and precious metal active components. The catalyst coating obtained by the method of the invention has high bonding degree with the matrix, is difficult to crack and peel off and has less dosage of additives. Thus, the catalyst has good operational performance and activity stability and can maintain higher activity under the scouring of high space velocity airflow and thermal shock, so that the long-term stable operation of the catalyst can be ensured.

A method for preparing a graphene oxide/white carbon black/rubber nanocomposite by mechanical blending belongs to the composite material field. In the graphene oxide/white carbon black/rubber composite prepared by the method provided by the invention, because graphene and white carbon black are inserted with each other, the self-aggregation of the two fillers is effectively suppressed, and thus a composite having high dispersion, high stripping and nanoscale dispersion is obtained. Not only while the composite has higher modulus and lower rolling resistance, but also the wear resistance of a rubber material is substantially improved, and the modulus and tear resistance of the composite are further improved; at the same time, because of the lamellar structure and good self-recovery capability of the graphene oxide, the rubber material is also imparted with good gas barrier performance and self-healing capability, and the nanocomposite has the incomparable advantages to any traditional fillers. The method provided by the invention is simple and easy to implement, low in cost and easy to industrialize, has wide suitability and better economic benefits and social benefits.

The invention relates to a lactobacillus plantarum strain of which the preservation number is CGMCC No.3166, which can be enriched in a modified MRS liquid culture medium. The lactobacillus plantarum strain is a white colony on an MRS solid culture medium, is straight, short-chained, Gram-positive and atrichous, has homofermentation, does not generate gas when fermenting glucose, generates acetic acid and lactic acid when fermenting ribose, and does not reduce nitrite. In application, the strain is activated and propagated and thalli are collected to form a fermenting agent which can inhibit the growth of amine producing bacteria in the fermenting production of meat products and generate biogenic amine oxidase which oxidizes and degrades tyramine, phenylethylamine, tryptamine and histamine. The invention has the advantages that the lactobacillus plantarum has strong growing ability, the fermenting agent has simple preparation technology and can effectively inhibit the growth and propagation of enterobacteria in the fermenting production of meat products and control the generation of biogenic amine, the generated biogenic amine oxidase can oxidize and degrade the contents of tyramine, phenylethylamine, tryptamine and histamine, and the lactobacillus plantarum strain as the fermenting agent for producing the fermented meat products can effectively reduce the accumulation of the biogenic amine.

The invention relates to a nakedflower beautyberry extract as well as a preparation method, a preparation and an application thereof. The nakedflower beautyberry extract is an extract which is extracted from nakedflower beautyberry leaves and contains a nakedflower beautyberry total flavonoid compound and a tannide class compound. The extract is obtained by the steps of extracting the nakedflower beautyberry leaves by water, diluted alcohol or diluted ketone and carrying out macroporous adsorptive resin column chromatography purification on an extracting solution after being concentrated. The nakedflower beautyberry extract has high purity and has the functions of bacteriostasis, hemostasis, pain relieving and convergence.

The present invention provides a preparation method for a sample of aluminum-based graphene thermal conductive composite. The method comprises the following steps: (1) grinding the graphene and metal powder with a ball mill, mixing uniformly to form graphene-cladded metal particles; (2) heating the aluminum alloy in a protection furnace with argon therein into semi-solid state, preserving heat and starting stirring; (3) adding the graphene-cladded metal particles prepared in step (2) to the semi-solid aluminum alloy in step (2) and keeping stirring; and (4) after uniformly stirring, heating the semi-solid aluminum alloy into liquid, and casting to obtain a sample of aluminum-based graphene thermal conductive composite. In the sample, the graphene is 0.1-5 wt% of the total amount of the metal. The preparation method avoids the complexity of the powder sintering and nonwetting of the graphene and aluminum. By melting the metal particles into liquid metal with semi-solid viscous force and uniformly mixing the reinforcing phase by stirring, it is possible to prepare a large sample quickly and efficiently with graphene-enhanced aluminum composite in a large scale.

The present invention provides an enzymolysis lignin or enzymolysis derivant modified asphalt composite material and a preparation method. The raw materials include the enzymolysis lignin or the enzymolysis lignin derivant, the asphalt and other modification assistant agents. The preparation steps: the enzymolysis lignin or the enzymolysis lignin derivant, other modification assistant agents and filling agent are mixed in advance to the melted asphalt substrate to be uniformly mixed, and then the mixture is displaced for solidification. The present invention makes full use of the renewable living resource, and not only resolves the problem of the present polymer modified asphalt that depends on the synthesis of the petrochemical raw materials, but also can reduced the use cost of the polymer modified asphalt; appropriate enzymolysis additive can be selected according to different requirements of the modified asphalt product to substitute partial petrochemical raw materials, thus improving the anti-aging performance of the polymer asphalt product; moreover, the craftwork is simple and is easy to implement, thereby can reduce the production cost and improve the competition strength of the product.

The invention discloses a urea-formaldehyde foam plastic heat-insulating board and its preparing process, wherein the board comprises urea formaldehyde resin, sodium dodecyl sulfate, phosphoric acid, oxalic acid, phenol, urea, magnesium chloride and water by a weight ratio of 50-75:0.1-1.5:0.05-0.5:0.1-0.5:0.01-0.15:0.05-1:0.05- 0.5:22-48.

The invention discloses an organic hydrophilic coating, which comprises water soluble hydrophilic acrylic resin, water soluble curing agent, leveling agent, and latent solvent. The hydrophilic coating can be packed singly to be applied to aluminum foil with antisepsis first coat coated in advance, and is provided with wide overcoatability with the first coat; abrasion to a mould coated with compound containing inorganic silicon and a mould for processing coating aluminum foil can not be caused.

The invention discloses a preparation method for magnetic biological carbon by one-step synthesis. The preparation method comprises the following steps: air-drying a biomass raw material under a natural condition and then storing for later use, and adding a dried and crushed biomass raw material into a ferric salt solution; slowly stirring a mixed solution, then, regulating a pH (potential of hydrogen) value with an NaOH solution, then, continuously stirring, then, standing until the biomass raw material absorbs the ferric salt solution to reach a saturation state, performing suction filtration to remove free water in the biomass raw material, pyrolyzing a suction filtration-treated biomass raw material in a pyrolyzing furnace to make carbon, and introducing an inert shielding gas into the pyrolyzing furnace to obtain the magnetic biological carbon. According to the preparation method disclosed by the invention, carbonization and magnetization are combined together to synthetize the magnetic biological carbon by one-step pyrolysis; meanwhile, different magnetic biological carbon materials can be obtained by changing the shielding gas (nitrogen or carbon dioxide); an effect of removing typical heavy metal pollutants in a water body is obvious, and moreover, the typical heavy metal pollutants can be separated and recovered from the water body as well so as to protect the environment from secondary pollution.

The invention discloses a preparation method of a hollow tubular composite oil absorption material. The preparation method adopts the process of: 1. preparing a graphene dispersion solution by adding 100-1500mL of a dispersant, graphene accounting for 20-30% of the total mass of a hollow tubular porous polymer material, and N, N-dimethylacetamide accounting for greater than 0 and less than or equal to 6% of the total mass of the dispersant, and conducting ultrasonic dispersion treatment for 20-40min, with the dispersant including ethanol, N-methyl pyrrolidone, tetrahydrofuran or dimethylformamide; and 2. dip coating a graphene adsorption layer: dipping the hollow tubular porous polymer material into the graphene dispersion solution, performing standing coating for 5-60min, then putting the material into a vacuum oven with a negative pressure of -0.1MPa, carrying out treatment at 100-150DEG C for 6-12h till complete drying, thus obtaining the hollow tubular composite oil absorption material. And the mass content of the adsorption layer accounts for 5-10% of the mass of the hollow tubular porous polymer material.

The invention discloses a double-capsule self-repairing epoxy coating and a preparation method thereof. The preparation method mainly uses Pickering emulsion droplet template method and conducts an interface polymerization of interface isophorone diisocyanate and tetraethylenepentamine in water-oil of epoxy interface to prepare epoxy microcapsule and tetraethylenepentamine microcapsule; and the two microcapsules are added to epoxy resin microcapsules for the formation of double-capsule self-repairing epoxy coating. The Pickering emulsion droplet template method ensures the stability of the emulsion, prevents emulsion droplet blending, improves package amount and efficiency of the microcapsule core material; Pickering emulsion improves the repair efficiency of the double-capsule self-repairing epoxy coating; the introduction of nano silica particles and nano clay in the capsule walls of the epoxy microcapsule and tetraethylenepentamine microcapsule improves the mechanical strength and thermal stability of the microcapsule wall, but also improves the brittleness of the microcapsule and the releasing efficiency of the microcapsule core material, so as to ensure the repair performance of the double-capsule self-repair coating.

The invention discloses a preparation method of a tea saponin ester succinate surfactant, comprising the following steps of: (1) adding a catalyst, tea saponin and succinic anhydride into an organic solvent to carry out an esterification reaction until the reaction is completely finished; (2) absorbing tea saponin ester succinate obtained from the step (1) by the use of macroporous resin; and (3) dissolving the macroporous resin absorbed with tea saponin ester succinate into a desorption agent for desorption reaction, filtering, and removing a solvent in the desorption agent so as to obtain the tea saponin ester succinate surfactant. The invention also provides the surfactant prepared by the above preparation method. The preparation technology provided by the invention is simple and environmentally friendly. The tea saponin ester succinate surfactant prepared by the method has both characteristics of a non-ionic surfactant and an anionic surfactant, can still maintain good surface activity under the acidic condition, and has a good market prospect.

The invention provides a preparation method of heteroatom doped graphene-based material supported noble metal nanoparticles. The preparation method comprises steps as follows: preparation of a heteroatom doped graphene-based material: a graphene-based material is subjected to ultrasonic treatment, a heteroatom precursor is added, heteroatom doping is performed in a hydrothermal kettle at the temperature of 150-200 DEG C, and the heteroatom doped graphene-based material is obtained; preparation of the heteroatom doped graphene-based material supported noble metal nanoparticles: the heteroatom doped graphene-based material is dissolved in deionized water and subjected to ultrasonic treatment, a stabilizer and a metal precursor are added, metal in the metal precursor is platinum, palladium, gold or silver, the mixture is continuously stirred, pH is adjusted to range from 8 to 14, a reduction agent is added, the mixture is continuously stirred, and the heteroatom doped graphene-based material supported noble metal nanoparticles are obtained after vacuum drying. The synergistic effect of the heteroatom and the carrier on noble metal is used, the activity and the stability of a catalyst are effectively improved, and a preparation process is simple and suitable for industrial production and has higher economic value.

A health-care food, cordyceps sinensis, is prepared through liquid fermenting to obtain the mycelia of cordyceps, culturing in the culture medium (barley grains or oatmeal), solid fermenting and baking. Its advantages are high nutritive value and low cost.

The invention discloses a ceramic column array reinforced metal based composite material or part and a preparation method thereof. The ceramic column array reinforced metal based composite material or part comprises a metal base body and ceramic columns regularly arranged in the metal base body, wherein the ceramic columns are integrally or locally compounded with the metal base body. The preparation method comprises the steps of: pretreating the ceramic columns, fixing a ceramic array and metal-casing, wherein a ceramic surface metallization, ceramic or ceramic and metallization method is adopted in the pretreatment of the ceramic columns. By adopting the preparation method provided by the invention, ceramic integrally or locally reinforced metal composite materials or parts with different ceramic reinforcement contents and types can be easily prepared. The ceramic column array reinforced metal based composite material or part has macro-uniformity of the ceramic reinforcements, has the characteristics of high reliability, excellent ceramic/metal interface bonding and the like in the use process, and can be used in the fields such as bearing, friction wear and the like.

The invention discloses a device and a method for detecting glucose based on optical fiber surface plasma resonance. The device comprises a light source, a polarizer, a polarization controller, a sensor probe, a filter and a photoelectric detector which are connected with each other in turn through an optical fiber, wherein the sensor probe comprises the optical fiber engraved with inclined fiber bragg gratings; a metal film in nanometer-level thickness is plated on the outer surface of the covering of the optical fiber; the light emitted from the light source passes through the polarizer and the polarization controller and then enters into the optical fiber engraved with the inclined fiber bragg gratings on the sensor probe; a covering film generated in the optical fiber is coupled with the metal film on the outer surface of the covering of the optical fiber; the surface plasma resonance is stimulated; the light containing the plasma resonance output by the optical fiber is sent into the photoelectric detector by the sensor probe through the filter. According to the invention, glucose oxidase is added into a to-be-measured serum solution, so that a hydrogen peroxide corroded metal film is formed, and the glucose concentration in the serum solution is acquired according to a response rate of the light intensity which changes along with the time and is detected and acquired by the photoelectric detector.

The invention discloses a method of preparing friction material from blending material by wet method, which includes steps: dissolving resin into solvent to forming resin solution, immerging reinforcing fiber into the resin solution and adding surfactant simultaneously to make the resin and the reinforcing fiber knitted together and dispersed equally; mixing the reinforcing fiber wrapped with resin, friction capability regulator and filler, stirring equally, drying and obtaining the friction material. Advantages of the method is simple, realizing equal mixing of the fiber and resin by mixing the friction material by wet method and wrapping the fiber utilizing fluidity of resin solution, enhancing combination strength of resin and fiber under action of surfactant, decreasing amount of used resin and fiber, reducing production cost, avoiding evulsion of the fiber by friction force during braking process, and increasing friction capability and service life of brake block. The prepared friction material can be widely used for preparing motor vehicle brake block, machine tool, and brake and clutch lining for electrode.

The invention provides a polylactic acid modified material, and a preparation method and application thereof. The polylactic acid modified material contains the components in parts by weight: 40 to 70 parts of polylactic acid (one of or a mixture or a copolymer of poly-L-lactic acid, poly-D-lactic acid and poly-DL-lactic acid), 10 to 20 parts of polyester thermoplastic polyurethane, 10 to 20 parts of plasticizer and 10 to 20 parts of organic or inorganic filler, wherein the plasticizer is one or a mixture of two of tributyl acetocitrate, epoxidized soybean oil, polypropylene glycol adipate and dioctyl maleate, and the organic or inorganic filler is one or more than one of starch, talcum powder, calcium carbonate, mica, montmorillonite, clay and titanium dioxide. According to the polylactic acid modified material provided by the invention, the flexibility of a polylactic acid material can be improved and the cost of a biodegradable material is reduced; and the prepared polylactic acid modified material has the tensile strength from 15 to 70MPa and the elongation at break of 20 to 380% which are obviously better than those of like products.

The invention provides a method for preparing nitrogen-doped porous carbon from a heavy organic component in a coal liquefaction residue, which belongs to the field of preparation technology for carbon materials. The method comprises the following steps: subjecting the coal liquefaction residue to solvent extraction so as to obtain a heavy organic component; mixing the obtained component with a nitrogen source and carrying out preoxidation treatment so as to obtain a nitrogen-rich carbon source; and with the nitrogen-rich carbon source as a raw material, preparing the nitrogen-containing porous carbon with a high specific area by respectively using physical activation, chemical activation or a template method. The method provided by the invention has the characteristics of simple process, a wide selection range of the nitrogen source and the like and provides a novel approach for high-added value utilization of the coal liquefaction residue. The prepared nitrogen-doped porous carbon can be extensively used in fields like electrode materials, adsorption materials and catalyst carriers.