31results about How to "Mass production available" patented technology

The invention discloses a doped graphene and a preparation method thereof. The doped graphene is prepared by adopting a chemical vapor deposition method, which comprises the steps as follows: a substrate with catalyst is put into a reaction kettle without oxygen, with the temperature of the substrate being 500 DEG C to 1200 DEG C; then material with carbon element and doped elements is piped into the reaction kettle, and the doped graphene is obtained; the catalyst is metal or metallic compound. The doped graphene prepared by the invention has good quality, and the preparation method is simple and feasible and can be conveniently operated and used for large-scale production.

The invention discloses a method for preparing a three-dimensional porous graphene material by solution. The method comprises the following steps of: immersing a three-dimensional porous template into a graphene oxide solution, and then depositing the graphene oxide on the template to realize three-dimensional assembling of the graphene oxide on the template, and then preparing the three-dimensional porous graphene material containing the template by reduction; removing the template from the three-dimensional porous graphene material containing the template, and then washing to obtain the three-dimensional porous graphene material. The aperture of the three-dimensional porous graphene material can be regulated and controlled by using the templates with different apertures the material prepared by the invention has the advantages of low density, high specific surface area, high heat conductivity, high-temperature resistance, and corrosion resistance; the preparation method is economical and simple and suitable for large-scale production. And the prepared material is applicable to aspects such as catalytic carriers, preparation of flexible conductors, and stretchable electronics.

The invention discloses a manganese-doped inorganic halogen perovskite quantum dot, and a preparation method and an application thereof. The preparation method comprises the following steps: dissolving lead salt and manganese chloride, and carrying out heating at 80 DEG C to 110 DEG C so as to obtain a halogen precursor; dissolving caesium salt so as to obtain a caesium precursor; adding the caesium precursor into the halogen precursor, and carrying out heating at 80 DEG C to 110 DEG C so as to obtain a quantum dot solution; and purifying the quantum dot solution so as to obtain the manganese-doped inorganic halogen perovskite quantum dot. The invention provides a method for high-yield preparation of the manganese-doped inorganic halogen perovskite quantum dot without the need of protection of inert gas at a low temperature. The method provided by the invention reduces preparation cost, improves preparation efficiency, and can be used for large-scale production. The quantum dot is applied to invisible ink which has good effect, is convenient to write and has stable invisible effect; meanwhile, after manganese is doped, the quantum dot has greatly-improved thermal stability and greatly-reduced toxicity.

The invention discloses graphene-ceramic composite powder and a preparation method thereof. Granulated ceramic powder and a graphene oxide are adopted as raw materials for preparation of the composite powder, wherein the content of the granulated ceramic powder is 99.5 to 99.99 weight percent of the total mass of the granulated ceramic powder and the graphene oxide, and the content of the graphene oxide is 0.01 to 0.5 weight percent of the total mass of the granulated ceramic powder and the graphene oxide. The preparation method comprises the following steps: (1) dispersion of the graphene oxide; (2) powder mixing; (3) drying and thermal reduction treatment. According to the preparation method, the physical adsorption performance of the granulated ceramic powder and high hydrophilicity of the graphene oxide are utilized, and the powder with a uniformly distributed graphene oxide is rapidly obtained. The preparation method has a simple process, is convenient to operate, clean and efficient, and can be applied to large-scale production. The graphene oxide in the prepared graphene-ceramic composite powder is uniformly distributed on a ceramic powder matrix, and the configuration has the structural characteristic of a single layer or few layers.

The invention discloses an end face coupler and a preparation method therefor, and the coupler comprises a silicon substrate; a buried oxide layer which is formed on an upper surface of the silicon substrate; top silicon which is formed in the buried oxide layer, and has first top silicon and second top silicon; silicon nitride waveguides formed on the top silicon, wherein the silicon nitride waveguides include a first silicon nitride waveguide and a second silicon nitride waveguide, wherein the central lines of the first silicon nitride waveguide and the second silicon nitride waveguide are located on the central line of the top silicon. The beneficial effects are that by growing a plurality of silicon nitride waveguides at different heights above the top silicon, a light field of a largeplaque size is realized, and the length of the longitudinal structure is reduced by combining the design of a longitudinal wedge structure, and finally a waveguide end face coupler with the high coupling efficiency is formed; the end face coupler is simple in fabrication process, is compatible with CMOS process, can be used for mass production, has low cost, and has a high industrial utilizationvalue.

The invention discloses a method for synthesis of band gap-adjustable monodispersed Cu2ZnSn(S1-xSex)4 nano-crystals by crystal phase control. The method comprises the following steps of mixing a metal chloride, elemental sulfur and elemental selenium in a three-necked flask, pouring an alcohol solvent and a less amount of oleylamine into the three-necked flask, putting the three-necked flask in a magnetic stirring electric jacket, stirring with heating in a nitrogen or argon protective atmosphere for a complex reaction, then cooling, adding ethanol into reaction products, carrying out centrifugal separation precipitation, cleaning oleylamine on surfaces of crystal particles by a cleaning agent, and carrying out vacuum drying to obtain the band gap-adjustable monodispersed Cu2ZnSn(S1-xSex)4 nano-crystals. The method provided by the invention has simple processes, a low cost and no pollution on the environment and is suitable for large scale production.

The invention relates to the technical field of anti-dripping agents, and in particular, relates to a method for preparing a polytetrafluoroethylene blend with high efficiency, environmental protection and low cost, and the product. The preparation method comprises the steps: blending a prepared polymer resin emulsion and suspension-method polytetrafluoroethylene resin powder, and powdering to obtain the polytetrafluoroethylene blend. Compared with a method for preparing a polytetrafluoroethylene blend from a polytetrafluoroethylene emulsion, the preparation method adopts the suspension-methodpolytetrafluoroethylene resin powder which is low in cost, controllable in particle size, high in stability and convenient to store; a surfactant PFOA harmful to the environment and human bodies is not contained, environmental pollution caused by using high-cost polytetrafluoroethylene emulsion is avoided. The preparation method is simple to operate, convenient to control, high in production efficiency, low in production cost and environment-friendly, and can be used for large-scale production.

The invention discloses a method for determining p-nitrophenol in a water system by taking graphene-loaded nano-nickel as an electrode, relates to the method for determining the p-nitrophenol in the water system, and aims to solve the problems that the conventional method for detecting the p-nitrophenol in the water system is complex in operation and cannot be widely applied. The method comprises the following steps: firstly, purifying a pure carbon electrode to obtain a purified pure carbon electrode; secondly, preparing a graphene / nano-nickel composite material; thirdly, preparing a composite material-modified carbon electrode; fourthly, preparing a liquid to be measured to obtain the liquid to be measured; and fifthly, performing detection of an electrochemical experiment, namely determining the electrochemical properties by adopting a three-electrode system by taking the composite material-modified carbon electrode as a working electrode, a platinum electrode as a counter electrode, and a Hg / HgO electrode as a reference electrode, and performing test by taking a certain scanning voltage and a certain scanning speed as experiment parameters to complete the determination of the p-nitrophenol in the water system. The method is mainly used for determining the p-nitrophenol in the water system.

The invention belongs to the technical field of photocatalysts, and particularly relates to an S-type heterojunction catalyst as well as a preparation method and application thereof. The preparation method comprises the steps of S1, synthesizing MIL-68 (In); S2, synthesizing NiIn LDH; and S3, synthesizing NiIn LDH / In2S3. According to the catalyst, In2S3 is grown on a NiIn LDH nanosheet in an epitaxial manner to construct a NiIn LDH / In2S3 heterojunction with a p-n type columnar structure. The NiIn LDH / In2S3 heterojunction is formed through one-step vulcanization of NiIn LDH, the advantages of NiIn LDH and In2S3 are integrated, higher light utilization efficiency and electron-hole separation capacity are achieved, electron-hole recombination is greatly inhibited, and CO2 pollutants in air can be effectively converted and utilized.

The invention relates to graphene oxide-ceramic composite powder and a preparation method thereof. The preparation method includes: using deionized water to wet graphene oxide, adding deionized waterto dilute, stirring for the first time, and ultrasonically treating to obtain a graphene oxide suspension; quickly adding ceramic powder into the graphene oxide suspension, and stirring for the secondtime to obtain mixed liquid of graphene oxide and the ceramic powder; performing suction filtering on the mixed liquid of graphene oxide and the ceramic powder to obtain mixed slurry, drying, and performing thermal reduction treatment to obtain the graphene oxide-ceramic composite powder, wherein the ceramic powder is made of a raw material of waste FCC catalyst. Preparation of the graphene oxide-ceramic composite powder reduces environment pollution and lowers enterprise cost, so that the objective of resource recycling is achieved. The ceramic powder and graphene oxide are mixed more uniformly and are good in dispersion performance; agglomeration of graphene oxide is avoided, and preparation cost is lowered; the preparation method is simple in process, convenient to operate, clean, efficient and suitable for large-scale production.

The invention provides a co-combustion preparation method of a sulfur doped graphene quantum dot and relates to a preparation method of a graphene quantum dot, in particular to the co-combustion preparation method which adopts cheap liquid paraffin and carbon disulfide as raw materials for preparation of the sulfur doped graphene quantum dot with a co-combustion method. According to the co-combustion preparation method of the sulfur doped graphene quantum dot, a structure and an energy level of the graphene quantum dot are effectively modulated through doping of heterogeneous sulfur atoms, so that photoelectrical properties of the graphene quantum dot are modulated, and the co-combustion preparation method of the sulfur doped graphene quantum dot is characterized in that the sulfur doped graphene quantum dot is obtained with the co-combustion preparation method, an ultrasonic preparation method and the like. According to the co-combustion preparation method of the sulfur doped graphene quantum dot, the overall technical route is innovative, the price is low, sulfur doped carbon nanospheres prepared with the co-combustion method are subjected to ultrasonic liquid-phase stripping, the sulfur doped graphene quantum dot is successfully prepared and has excellent photoelectrical properties, the extra energy level of the graphene quantum dot is increased, and the performance of the graphene quantum dot is effectively improved.

The invention relates to a preparation method for copper-doped multilayer graphene, and relates to graphene. According to the preparation method for copper-doped multilayer graphene, through doping ofheterogeneous copper atoms, the structure and the energy stage of the multilayer graphene are effectively regulated, and the photoelectric property of the multilayer graphene is improved. According to the preparation method, a graphite target material and a copper target material are used as raw materials, direct current radio frequency joint sputtering of magnetron sputtering is adopted, a copper element is led into a carbon substrate, and the structure and the energy stage of the multilayer graphene are effectively improved. According to the preparation method, low-cost easily-obtained andnontoxic graphite target material and copper target material are used as the raw materials, the copper element is led into the carbon substrate, the structure and the energy stage of the multilayer graphene are effectively improved, and the electron transition mode is more diverse; and the photoelectric property of the multilayer graphene is effectively changed, and the multilayer graphene can beused for detectors, light emitting diodes, solar batteries, supercapacitors, lithium ion batteries, fluorescent materials and other fields.

The invention discloses an end face coupler and a preparation method therefor, and the coupler comprises a silicon substrate; a buried oxide layer which is formed on an upper surface of the silicon substrate; top silicon which is formed in the buried oxide layer, and has first top silicon and second top silicon; silicon nitride waveguides formed on the top silicon, wherein the silicon nitride waveguides include a first silicon nitride waveguide and a second silicon nitride waveguide, wherein the central lines of the first silicon nitride waveguide and the second silicon nitride waveguide are located on the central line of the top silicon. The beneficial effects are that by growing a plurality of silicon nitride waveguides at different heights above the top silicon, a light field of a largeplaque size is realized, and the length of the longitudinal structure is reduced by combining the design of a longitudinal wedge structure, and finally a waveguide end face coupler with the high coupling efficiency is formed; the end face coupler is simple in fabrication process, is compatible with CMOS process, can be used for mass production, has low cost, and has a high industrial utilizationvalue.

The invention relates to a PGS / SF electrospun artificial blood vessel and a preparation method thereof. The invention discloses a preparation method of the PGS / SF electrospun artificial blood vessel.The method comprises the following steps: 1, dissolving a PGS prepolymer and SF into an organic solvent to obtain a spinning solution; carrying out electrostatic spinning on the spinning solution; receiving micro-nano fibers by adopting a cylindrical receiving device rotating around the axis of the receiving device, winding the micro-nano fibers outside the receiving device to form a tubular PGS / SF electrospun membrane; and drying and solidifying the tubular PGS / SF electrospun membrane after completely spinning to obtain a PGS / SF electrospun artificial blood vessel. According to the PGS / SF electrospun artificial blood vessel, the spinnability and fiber forming property of PGS are improved through the SF, the PGS / SF electrospun artificial blood vessel is successfully obtained, the caliber of the electrospun artificial blood vessel is smaller than 6 mm, and the electrospun artificial blood vessel has the excellent elasticity of the PGS and the excellent biological and mechanical properties of the SF.

The invention relates to the technical field of high polymer materials, particularly to a glass fiber-reinforced PA56 / PP alloy material and a preparation method thereof. The material is composed of PA56, PP, a compatilizer, an antioxidant, a lubricant and glass fibers. According to the invention, the above components are used in a matched mode. specific weight is reasonably selected, and glass fiber reinforcement is adopted, so the mechanical property of the PA56 / PP alloy material is greatly improved, each property of the PA56 / PP alloy material is fully embodied, and the PA56 / PP alloy materialhas good impact resistance and low water absorption rate. The preparation method disclosed by the invention is simple to operate and high in production benefits, product cost can be reduced, and theapplication range of PA56 is expanded.

The invention discloses a method for preparing a three-dimensional porous graphene material by solution. The method comprises the following steps of: immersing a three-dimensional porous template into a graphene oxide solution, and then depositing the graphene oxide on the template to realize three-dimensional assembling of the graphene oxide on the template, and then preparing the three-dimensional porous graphene material containing the template by reduction; removing the template from the three-dimensional porous graphene material containing the template, and then washing to obtain the three-dimensional porous graphene material. The aperture of the three-dimensional porous graphene material can be regulated and controlled by using the templates with different apertures the material prepared by the invention has the advantages of low density, high specific surface area, high heat conductivity, high-temperature resistance, and corrosion resistance; the preparation method is economical and simple and suitable for large-scale production. And the prepared material is applicable to aspects such as catalytic carriers, preparation of flexible conductors, and stretchable electronics.

The invention relates to a method for preparing a ferrum-fluorine-codoped nano-titanium dioxide visible light photocatalyst. The method comprises the following steps: (1) at the room temperature, adding nitric acid into the ethanol solution of tetrabutyl titanate dropwise, adding ferrum-fluorine-containing ethanol solution into the mixed solution with stirring, and stirring the mixed solution at the room temperature for 0.5 to 2 hours to perform a hydrolysis reaction to obtain light yellow titanium dioxide sol; (2) ageing the obtained titanium dioxide sol at the room temperature to obtain titanium dioxide gel, and drying the titanium dioxide gel to obtain dried titanium dioxide gel; and (3) grinding, screening and sintering the dried titanium dioxide gel to obtain the ferrum-fluorine-codoped nano-titanium dioxide visible light photocatalyst. The method has the characteristics of mild reaction conditions, easy control, simple equipment and rich raw material resources, simple synthetic process and high yield, and can be used for large-scale production; and the prepared ferrum-fluorine-codoped nano-titanium dioxide visible light photocatalyst has high performance.

The invention relates to a PGS / SF electrospun artificial blood vessel and a preparation method thereof. The preparation method of the PGS / SF electrospun artificial blood vessel of the present invention comprises the following steps: dissolving the PGS prepolymer and SF in an organic solvent to obtain a spinning solution, performing electrospinning on the spinning solution, and adopting a cylinder rotating around its own axis The shaped receiving device receives micro-nano-scale fibers, and the micro-nano-scale fibers are wound outside the receiving device to form a tubular PGS / SF electrospun membrane. After the spinning is complete, the tubular PGS / SF electrospun membrane is dried and solidified to obtain PGS / SF Electrospun artificial blood vessels. The invention uses SF to improve the spinnability and fibrosis of PGS, and successfully obtains PGS / SF electrospun artificial blood vessels. The caliber of the electrospun artificial blood vessels is less than 6mm, which has both the excellent elasticity of PGS and the excellent biology and mechanics of SF performance.

The invention discloses a method for synthesis of band gap-adjustable monodispersed Cu2ZnSn(S1-xSex)4 nano-crystals by crystal phase control. The method comprises the following steps of mixing a metal chloride, elemental sulfur and elemental selenium in a three-necked flask, pouring an alcohol solvent and a less amount of oleylamine into the three-necked flask, putting the three-necked flask in a magnetic stirring electric jacket, stirring with heating in a nitrogen or argon protective atmosphere for a complex reaction, then cooling, adding ethanol into reaction products, carrying out centrifugal separation precipitation, cleaning oleylamine on surfaces of crystal particles by a cleaning agent, and carrying out vacuum drying to obtain the band gap-adjustable monodispersed Cu2ZnSn(S1-xSex)4 nano-crystals. The method provided by the invention has simple processes, a low cost and no pollution on the environment and is suitable for large scale production.

The invention relates to a preparation method for copper-doped multilayer graphene, and relates to graphene. According to the preparation method for copper-doped multilayer graphene, through doping ofheterogeneous copper atoms, the structure and the energy stage of the multilayer graphene are effectively regulated, and the photoelectric property of the multilayer graphene is improved. According to the preparation method, a graphite target material and a copper target material are used as raw materials, direct current radio frequency joint sputtering of magnetron sputtering is adopted, a copper element is led into a carbon substrate, and the structure and the energy stage of the multilayer graphene are effectively improved. According to the preparation method, low-cost easily-obtained andnontoxic graphite target material and copper target material are used as the raw materials, the copper element is led into the carbon substrate, the structure and the energy stage of the multilayer graphene are effectively improved, and the electron transition mode is more diverse; and the photoelectric property of the multilayer graphene is effectively changed, and the multilayer graphene can beused for detectors, light emitting diodes, solar batteries, supercapacitors, lithium ion batteries, fluorescent materials and other fields.

The invention discloses a manganese-doped inorganic halogen perovskite quantum dot, and a preparation method and an application thereof. The preparation method comprises the following steps: dissolving lead salt and manganese chloride, and carrying out heating at 80 DEG C to 110 DEG C so as to obtain a halogen precursor; dissolving caesium salt so as to obtain a caesium precursor; adding the caesium precursor into the halogen precursor, and carrying out heating at 80 DEG C to 110 DEG C so as to obtain a quantum dot solution; and purifying the quantum dot solution so as to obtain the manganese-doped inorganic halogen perovskite quantum dot. The invention provides a method for high-yield preparation of the manganese-doped inorganic halogen perovskite quantum dot without the need of protection of inert gas at a low temperature. The method provided by the invention reduces preparation cost, improves preparation efficiency, and can be used for large-scale production. The quantum dot is applied to invisible ink which has good effect, is convenient to write and has stable invisible effect; meanwhile, after manganese is doped, the quantum dot has greatly-improved thermal stability and greatly-reduced toxicity.

The invention relates to a method for preparing nano-gold particles, in particular to a method for preparing liquid nano-gold particles by using atmospheric pressure low-temperature plasma plume. A method for preparing liquid gold nanoparticles using atmospheric pressure low-temperature plasma plume, comprising the following steps: placing a precursor on a petri dish; placing the petri dish in a plasma discharge area; opening and adjusting a gas flow meter to control the gas cylinder Output stable and uniform working gas to the plasma device; turn on the high-voltage power supply to stimulate the generation of atmospheric pressure low-temperature plasma, and the plasma forms a plasma plume on the liquid surface of the precursor to reduce Au 3+ Generate gold nanoparticles; collect the generated gold nanoparticles, measure particle size and test stability. The preparation method of the invention accelerates the generation speed of the nano-gold particles and ensures the purity of the generated nano-gold. The method has the advantages of simple operation, high time efficiency and high purity, high industrial feasibility, and can be used for large-scale production.

The invention relates to a preparation method of monosilane and belongs to the technical field of inorganic synthesis. The preparation method of the monosilane comprises the following preparation steps of: a, carrying out decomposition reaction on hydride and silicon tetrachloride to obtain monosilane and chloride; b, electrolyzing the chloride obtained in step a to obtain elemental chlorine and metallic simple substance; and c, enabling the elemental chlorine obtained in step b to react with metal silicon to obtain silicon tetrachloride, enabling the metallic simple substance to react with hydrogen gas to obtain hydride, and returning the obtained tetrachloride and the hydride to step a, wherein the hydride is sodium hydride or lithium hydride. According to the preparation method of the monosilane disclosed by the invention, the by-products generated in the process flow are returned to the system while the closed-loop use of the materials is achieved, so that the utilization rate of the materials is improved, and the preparation method can be used for the large-scale production. Meanwhile, the preparation method has the advantages of being free of catalyst, high in conversion rate and the like.

The invention discloses a pressure-infiltration coating device and method applicable to a porous ceramic matrix photocatalytic filler block. The pressure-infiltration coating device is characterized by comprising a reaction tank body, a rotating shaft, an air inlet pipe, air outlet pipes, a support frame, a base, a motor and a reduction gearbox; the reaction tank body is a hollow cuboid; two end covers are mounted at the two ends of the reaction tank body, so as to seal the reaction tank body; the rotating shaft is fixed in the middles on two sides of the reaction tank body; the two ends of the rotating shaft is fixed on the support frame; two lining plates are mounted in the reaction tank body; the porous ceramic block is fixed between the lining plates; the air inlet pipe is mounted in the middle of one end cover; the tail end of the air inlet pipe is connected with an air inlet valve; the air outlet pipes are mounted on one side wall of the reaction tank body; the tail ends of the air outlet pipes are connected with air outlet valves; the motor and the reduction gearbox are fixed on a bracket on one side of the support frame, and connected with the rotating shaft; the motor can drive the reaction tank body to rotate around the rotating shaft. Through the adoption of the device and method, a porous ceramic matrix nanometer photocatalytic material is prepared, has the advantages that the coverage rate of an immobilized film is high and the combination is firm, and can be utilized for mass production.

The invention relates to an antistatic ultrahigh-molecular-weight polyethylene fiber material used for packaging a mechanical guide rail, and belongs to the field of polyethylene fibers. A preparing method of the antistatic ultrahigh-molecular-weight polyethylene fiber material used for packaging the mechanical guide rail comprises the following steps of utilizing a double-screw extruder for swelling ultrahigh-molecular-weight polyethylene resin to prepare a spinning solution; forming gel-spun filaments after spinning and water-bath solidification are conducted; conducting preliminary draftingon the gel-spun filaments, and then conducting three-level thermal stretching on gel-spun fibers at 120 DEG C, 150 DEG C and 180 DEG C separately. Through three-level thermal stretching, the fibers gradually have surface defects, and graphene is well attached to the surfaces of the fibers. The antistatic ultrahigh-molecular-weight polyethylene fibers have excellent antistatic performance, wear resistance and strength.

The invention discloses a refined panax quinquefolius total saponin component and a purification preparation method for extracting panax quinquefolius total saponins, and particularly relates to the processes of alcohol extraction, clarification and filtration, reversed-phase preparative chromatography refining, gel decoloration and impurity removal, and concentration and drying. An panax quinquefolius medicinal material is used as a raw material, and an ethanol extracting solution is used as a panax quinquefolius crude extract solution. The crude extract solution is clarified through a membrane filtration technology. Refining preparation is performed through reversed phase chromatography by utilizing a high-pressure preparation system, and finally, decoloration and impurity removal are performed by adopting ion exchange gel chromatography. The invention further provides a refined panax quinquefolius total saponin component. The raw material is mainly composed of the panax quinquefolius medicinal material, and the refined panax quinquefolius total saponin component is refined by the preparation method in each embodiment. The panax quinquefolius total saponins prepared by the methodare high in content and yield. The production process has the characteristics of simple operation of the preparation process, no need of toxic and harmful organic solvents, low cost, harmless emission to the environment and the like.

The invention discloses emulsified oil produced by taking high-concentration wastewater as a raw material and a preparation method and application thereof. The emulsified oil is prepared from 50-65 parts of base oil, 6-12 parts of an emulsifier, 13-20 parts of an antirust slow-release agent, 4-8 parts of an extreme pressure agent and 4-8 parts of triethanolamine, the preparation method comprises the following steps: adding the base oil into a container, heating and stirring, adding the emulsifier and part of the antirust agent when the temperature rises to 70 DEG C, adding the extreme pressureagent, the oiliness agent, the residual antirust agent, triethanolamine and the solubilizer after 30 minutes, and reacting to obtain the required emulsified oil. The obtained emulsified oil is used as a cutting fluid, a grinding fluid and a drilling cooling fluid, and the emulsified oil which is widely applied is obtained by blending the contents of different components so that the pollution problem of high-concentration wastewater is solved, the high-concentration wastewater is effectively utilized, and wastes are changed into valuable things.

The invention discloses graphene with a regular shape and a preparation method thereof. The graphene with a regular shape is prepared by the chemical vapor deposition method and comprises the following steps: placing a metal foil or a substrate with a metal catalyst in a reactor without oxygen and water to ensure that the temperature of the metal foil or the substrate reaches 800-1050 DEG C, and then introducing a carbon source in the reactor to react and obtain the graphene with a regular shape. The obtained graphene in the invention has an equiangular hexagonal structure; and the method in the invention is convenient to operate, is simple and practical and can be used in mass production.