84results about How to "With large-scale application" patented technology

The invention discloses surface-modified inorganic nanoparticles as well as a preparation method and application thereof. The surface-modified inorganic nanoparticles are composed of a core of inorganic metal oxide nanoparticles and amphipathic organic segments grafted on the surface of the particles, wherein the amphipathic organic segments grafted on the surface of the particles account for 0.1-50% of total mass of the surface-modified inorganic nanoparticles; the inorganic metal oxide nanoparticles refer to one or several in aluminum oxide, silicon dioxide, titanium dioxide, zirconium dioxide and zinc oxide inorganic nanoparticles; and the amphipathic organic segments are produced from a vinyl silicane coupling agent and 2-acrylamido--methylpropane sulfonic acid through solution polymerization. The surface-modified inorganic nanoparticles can be used for preparing polymer electrolyte. Therefore, the inorganic nanoparticles are high in dispersity in a polymer matrix, and the prepared polymer electrolyte is high in lyotropic property, high in ionic conductivity and stable in electrochemical performance.

The invention provides a method for preparing graphite-phase carbon nitride nanosheets by using a solution phase and belongs to the technical field of preparation of nano materials. The method comprises the following steps: calcining dicyanodiamine into a ceramic crucible with a cover, thereby obtaining a g-C3N4 polymer material; adding the g-C3N4 polymer material into a tetrahydrofuran solution of an alkali metal lithium or sodium, performing ultrasonic dispersion, adding halogenated organic solvent, and sequentially washing a solid product obtained by reaction with toluene, ethanol and water, thereby obtaining the g-C3N4 nanosheets. The preparation method has the advantages of cheap raw materials, simple process, high preparation efficiency and the like; the obtained g-C3N4 nanosheets are greatly enlarged in specific surface area, have good dispersibility in an organic phase and a water phase, and have favorable photocatalytic performance.

Belonging to the technical field of biochar preparation, the invention discloses preparation of Fe-Zn and phosphate modified sludge biochar and application of the same in removal of fluoroquinolones antibiotics from water. The preparation method includes: dewatering and drying the sludge from a secondary sedimentation tank of a municipal sewage treatment plant, then performing pyrolysis by a hightemperature tubular furnace, then utilizing Fe-Zn and phosphate for modification, and finally conducting two calcining to obtain Fe / Zn+H3PO4-SBC. The Fe / Zn+H3PO4-SBC prepared by the invention has adsorption capacity on fluoroquinolones antibiotics ciprofloxacin, norfloxacin and ofloxacin up to 25.43-88.73mg / g. The method provided by the invention adopts municipal sludge as the raw material, reduces the production cost, realizes the resource utilization of municipal sludge and efficient removal of antibiotics from water, also has the advantages of simple operation, low cost and the like, and isa potential removal method for fluoroquinolones antibiotics in water.

The invention belongs to the technical field of nano material production, and relates to a preparing method of hollow magnetic carbon nanospheres with MOFs growing inside in a confinement mode. The preparing method includes the steps that FeCl3.6H2O, ethylene glycol, ethyl alcohol and sodium acetate are mixed and subjected to hydrothermal reaction to obtain Fe3O4 spheres, the Fe3O4 spheres, ethyl alcohol, deionized water and ammonia water are mixed to obtain Fe3O4 sphere mixed solution, a silicon source is added dropwises into the Fe3O4 sphere mixed solution to react, then resorcinol and formaldehyde are added to react so as to obtain Fe3O4@SiO2@ resorcinol-formaldehyde resin spheres, Fe3O4@SiO2@C spheres are obtained after calcining under argon and etched by sodium hydroxide water solution to obtain magnetic carbon nanocages; finally the magnetic carbon nanocages react with metallic nitrate and 2-methylimidazole to obtain the hollow magnetic carbon nanospheres which are uniform in size and are distributed uniformly, the morphology of the hollow magnetic carbon nanospheres is controlled well, and the MOFs of the hollow magnetic carbon nanospheres grow inside in the confinement mode. The process is simple, and the materials needed in the reaction process are low in toxicity and harmless.

The invention provides a fuel cell flow field plate and a fuel cell, and relates to the field of fuel cells. The fuel cell flow field plate is mainly suitable for hydrogen-air fuel cells and hydrogen-oxygen fuel cells. The fuel cell flow field plate comprises a flow field plate body, an air inlet, an air outlet, a flow channel, flow channel ridges and bosses, and the flow channel and the flow channel ridges are both arranged on the flow field plate; fluid enters the flow channel from the air inlet and flows out from the air outlet; and the flow channel ridges are arranged on the two sides of the flow channel, and the bosses are arranged on the side faces of the flow channel ridges in the flow channel direction at certain intervals. By introducing the boss structure, local turbulence is generated, and mass transfer and heat transfer of reaction gas to a gas diffusion layer are enhanced; the wall surface of the flow channel is divided by the bosses, so that the effective contact area ofliquid drops and the wall surface of the flow channel is reduced, a continuous water film is prevented from being formed, liquid water in the flow channel is not easy to accumulate, and the phenomenonof 'flooding' is relieved; and the boss structure also increases the convective heat exchange area, so that the heat exchange capacity of the flow field is enhanced, and the temperature distributionof the flow field is improved.

The invention discloses a preparation method for a core-shell carbon-coated iron nanocomposite material, and solves the problems of long preparation period, complex process, high raw material requirement and difficult product separation of a preparation method for preparing a carbon-coated metal nanocomposite material in the prior art. The preparation method comprises the following steps: 1) dissolving ferrocene in an organic solvent carbon source, uniformly mixing, and then adding a discharge medium to obtain a mixture; 2) carrying out microwave heating reaction on the mixture obtained in the step 1), and continuously charging an inert gas during the reaction process; and 3) after the reaction is concluded, continuing to charge the inert gas for a set time, cooling, and then eliminating the discharge medium to obtain the core-shell carbon-coated iron nanocomposite material.

The invention discloses a compound type semiconductor photocatalyst based on graphene, CdS nano crystal and cheap metal and a preparation method of the compound type semiconductor photocatalyst as well as a photocatalytic system and a method for preparing hydrogen. According to the compound type semiconductor photocatalyst, a cheap inorganic salt is used as a precursor in the presence of a biomass and a derivative thereof and cobalt, nickel, iron or manganese metal is loaded on a graphene-CdS compound in situ by a photic driving method to prepare the ternary compound type semiconductor photocatalyst based on the graphene, the CdS nano crystal and the cheap metal; meanwhile, the biomass and the derivative of the biomass are reformed to generate the hydrogen. The compound catalyst loaded with the cheap metal is prepared by adopting an in-situ illumination method and the catalytic hydrogen production efficiency is obviously improved; the graphene is introduced so that the catalyst is efficient. The catalytic system has the advantages of visible light response, simple equipment and convenience in operation; the catalyst is stable and cheap; a preparation process does not need to take noble metal materials including platinum, rhodium and the like as catalyst promoters.

The invention relates to a mesoporous nanotube material of an inorganic salt, a preparation method of the mesoporous nanotube material by employing gradient pyrolysis and electrostatic spinning, and application of the mesoporous nanotube material. According to a mesoporous nanotube obtained in an air atmosphere condition, the tube wall is formed by accumulating a plurality of tiny nano-particles; the outer diameter of the nanotube is 50-200nm; the diameter of an inner tube is 20-100nm; the size of the nano-particles is 5-50nm; according to a mesoporous nanotube obtained under an inert atmosphere condition, the tube wall is composed of tiny nanoparticles and an ultra-thin mesoporous carbon nanotube; the nanotube is uniform in morphology; the outer diameter of the tube is 50-300nm; the inner diameter of the tube is 20-200nm; the sizes of the tiny particles are 5-30nm; and the nanocrystal particles are uniformly inlaid on a carbon membrane. The mesoporous nanotube material has the beneficial effect of being capable of being conveniently popularized into kinds of inorganic salts, and has the characteristics of being high in universality, simple in process, environmentally friendly, and low in price; the obtained material has the excellent electrochemical property, and has the large-scale application potential.

The invention discloses a method for preparing a fuel cell polar plate through 3D printing. The fuel cell polar plate is prepared by the following steps: (a) sequentially adding nano-alloy powder, polylactic acid, glass fibers and an emulsifying agent into a dichloromethane solvent, so as to prepare solid jelly; (b) carrying out low-temperature thermal treatment on the solid jelly under a vacuum condition, and carrying out ball milling, granulation and wiredrawing, so as to obtain a 3D printing raw material; and (c) printing the 3D printing raw material, carrying out plasma thermal treatment,so as to obtain a core-shell structure fuel cell polar plate material in which an alloy phase is packaged with modified polylactic acid. The method has the beneficial effects that the prepared fuel cell polar plate has good surface hydrophobicity, high glass transition temperature and softening temperature and good conductivity and can adequately meet the demands of fuel cells; and meanwhile, theprocess is simple, the yield and the cost are superior, and the method has potential in large-scale application.

The invention relates to a three-dimensional hierarchical heterostructure nano-material and a gradient hydro-thermal preparation method thereof. The nano-material can be used as an electrode material for a lithium ion battery or a material for other electrochemical devices and is prepared by growing secondary structure vanadate nanorods or nanoparticles on microspheres formed by enclosure of vanadium oxide nanosheets. The invention has the following beneficial effects: the three-dimensional hierarchical heterostructure obtained in the invention has uniform morphology and a great specific surface area, exerts an effective buffering effect during intercalation and deintercalation of ions, reduces damage to a primary structure and has superior electrochemical performance; the prepared nano-material shows excellent electrochemical performance when used as the electrode material for the lithium ion battery or the material for other electrochemical devices; and the method provides a strategy for preparation of a hierarchical heterostructure, has certain universality and shows potential for large scale application.

The invention discloses a treatment technology for oily sludge and drillings. The technology of combination of two times of rinsing is provided according to the characteristics of pollutants in the oily sludge and drillings, so that the problem that the oily sludge and drillings are not treated thoroughly during a single-cleaning process is avoided. Preparation of a cleaning solution for the treatment technology is characterized by comprising the following steps: sodium carbonate and dodecyl trimethyl ammonium chloride are accurately weighed, are dissolved in water, and are mixed uniformly according to a concentration ratio of 2 to 1; then a reverse demulsifier with the volume ratio of 2.5%, PAM with the concentration of 7500 mg / L and PAC with the concentration of 625 mg / L are added in; and the mixture is fully stirred and is mixed uniformly. According to the treatment technology disclosed by the invention, a current treatment technology for the oily sludge and drillings in China is successfully improved; the pollutants in the oily sludge and drillings are subjected to stabilization and detoxification treatment by adopting a chemical method; and the combination of two times of rinsing is innovatively provided, so that energy consumption is further reduced, and the secondary cleaning solution can be recycled for use. Compared with the current technology in China, the treatment technology disclosed by the invention has the advantages that the technology is simple in treatment process and high in practicality, and is capable of being widely applied. Therefore, the treatment technology has novelty, creativity and advancement and has very high practical application value.

The invention provides a method for preparing a carbon dioxide reduction photocatalyst by utilizing hyperaccumulators. The method comprises the steps: firstly, carrying out crushing and sand removal treatment on the hyperaccumulators; adding distilled water into the hyperaccumulators, uniformly mixing, and carrying out hydrothermal reaction at the temperature of 120-250 DEG C for 2-50 h to obtaina reaction product; and finally, centrifuging, washing and drying the obtained reaction product to obtain the carbon dioxide reduction photocatalyst. The preparation method is simple; the prepared carbon dioxide reduction photocatalyst can realize the reduction of carbon dioxide, and high added value products such as carbon monoxide are obtained; in addition, the invention provides a new method for resource utilization of the hyperaccumulators, and the method has wide application prospects in the fields of treatment of the hyperaccumulators containing heavy metals, reduction of carbon dioxideand other energy and chemical engineering.

The invention discloses a preparation method of a catalyst for photo-catalytically splitting water to produce hydrogen and relates to nano materials. The preparation method includes: placing urea into a ceramic crucible with a cover, and calcining in a muffle furnace to obtain yellow g-C3N4 polymer material; under nitrogen protection, ultrasonically dispersing the g-C3N4 polymer material into tetrahydrofuran solution, using lithium metal as the electron donor and naphthalene as the first electron acceptor, performing solution-phase stripping in the presence of halogenated hydrocarbon, adding ethanol into the reaction product after reaction to remove unreacted lithium metal, centrifuging, washing the obtained solid product, and drying to obtain g-C3N4 nano-plates; ultrasonically dispersing the g-C3N4 nano-plates into water, adding graphene oxide, continuing ultrasonic dispersion to obtain a mixed solution, transferring the mixed solution into a reaction kettle, rising temperature to 140-200 DEG C, keeping the temperature for 2-12 hours, then cooling to room temperature, performing suction filtration to obtain solid product, and performing vacuum drying to obtain the catalyst for photo-catalytically splitting water to produce hydrogen.

The invention discloses saltpetering and whitening resistant outer wall decorating mortar. The saltpetering and whitening resistant outer wall decorating mortar comprises the following components in parts by weight: 100 parts of Portland cement, 300-370 parts of sand, 4-10 parts of silica fume and 15-30 parts of acrylic emulsion. When the saltpetering and whitening resistant outer wall decorating mortar is used, the Portland cement, the sand and the silica fume are uniformly premixed in proportions to form dry mortar powder, 70-100 parts of mixing water is uniformly mixed with an acrylic emulsion to form a diluted emulsion, the dry mortar powder is added to the diluted emulsion, and the mixture is uniformly stirred to form the saltpetering and whitening resistant outer wall decorating mortar for application. The saltpetering and whitening resistant outer wall decorating mortar has the advantages that the saltpetering and the whitening can be inhibited at high efficiency, the effect of inhibiting the saltpetering and the whitening is prominent in humid and low-temperature environments, and the sensitivity of the construction quality of the building decorating mortar to the temperature and the humidity is greatly reduced.

The invention belongs to the technical field of synthetic natural gas, and relates to a device and a method used for water electrolysis hydrogen production and CO2 methanation production of syntheticnatural gas. The device comprises a water tank, a heat exchanger, a gas mixer, and a gas liquid separation reactor, and also comprises a water electrolysis hydrogen production unit, a carbon dioxide generation unit, and a methanation unit. According to the method, heat exchange is adopted for recycling of heat energy released in methanation process by the water electrolysis hydrogen production unit, so that energy loss in water electrolysis hydrogen production process is reduced, water generated in reaction process is recycled at the same time, the preparation cost of CO2 methanation production of synthetic natural gas is reduced, and no pollution is caused.

The invention discloses a metal surface treatment method based on a chitosan and mussel adhesion protein composite membrane, and relates to high-molecular compounds. The method comprises specific steps that step-by-step polishing, ultrasonic cleaning and drying are carried out on a metal material surface to be treated, and then an electro-deposition is adopted to enable chitosan and mussel adhesion protein to form a composite membrane layer on the metal material surface; and electro-deposition specifically comprises the steps that chitosan is added into a chitosan buffer solution to form a chitosan solution; the mussel adhesion protein is added into a mussel adhesion protein buffer solution to form a mussel adhesion protein solution; and the metal material to be treated is sequentially immersed into the chitosan solution and the mussel adhesion protein solution to be electrically deposited, and after drying, the composite membrane layer is formed on the metal material surface. The composite membrane layer is formed on the metal material surface, and the electro-deposition step can be repeatedly carried out to form multiple composite coatings. The method is simple, easy to implement and particularly suitable for corrosion prevention of metallic biomaterials.

The invention discloses a fusion pedestrian positioning method based on a position fingerprint and a PDR algorithm, and the method comprises the steps: carrying out the coordinate conversion of reference point positioning data, obtaining the positioning data under a plane coordinate system, carrying out the calculation through the position fingerprint algorithm and the PDR algorithm according to the converted positioning data under the plane coordinate system, obtaining the first positioning coordinate and the second positioning coordinate, calculating a fusion judgment value, judging whether a preset fusion threshold value is met or not, if yes, carrying out first-order fusion and second-order fusion through extended Kalman filtering and particle filtering respectively, obtaining final positioning data, and if not, taking the first positioning coordinate as the final positioning coordinate directly. According to the method, indoor positioning data are fused, the positioning precision is improved, the problems that a traditional position fingerprint algorithm is unstable in positioning and a PDR algorithm cannot determine the initial position, is low in positioning precision and has accumulated errors are solved, and the method has the advantages of being low in cost, high in positioning precision and high in adaptability and can be widely applied to multiple scenes.

The invention discloses a method for rapidly preparing porous graphene by a partial burning method. The method comprises the following steps: adding zinc nitrate into a graphene oxide aqueous suspension, ultrasonically dispersing for 2 to 30 min, then performing the rapid suction filtration by utilizing quantitative filter paper, obtaining a graphene oxide compound which is incompletely covered byzinc nitrate water slide layer on the filter paper; and drying the filter paper with the compound at 35 to 55 DEG C, igniting the filter paper on an alcohol lamp, after the black graphene is completely burned, obtaining a compound of zinc oxide nano particles and porous graphene, washing for 1 to 8 times by using strong acid, washing with water, thus obtaining the porous graphene. The burning synthetic method is applied to the preparation of the porous graphene, so that the simple and rapid preparation process of the porous graphene at a low temperature is realized, thereby greatly reducing the preparation cost of the porous graphene, and increasing the utilization efficiency.

The invention provides a method for repairing a water body ecosystem, and the method comprises the following steps: 1) adding a water body substrate improver into a raw water body, planting aquatic vegetation after the water quality becomes clear, improving the light compensation condition of the water body, and constructing an underwater forest system; 2) constructing ecological interception systems on two sides of the water body to reduce suspended solids in the water body and maintain water quality; and 3) constructing a surface runoff buffer area at the periphery of the ecological interception system to prevent the instability of a side slope caused by wind and rain and prevent turbid water from polluting the water body after water and soil loss. Through the method, the stepped restoration system of the water ecological system is formed; the concentration of suspended matters in the water body can be effectively reduced through the water ecological interception system, the transparency of the water body is greatly improved, a good environment for aquatic plant growth is provided for the water body, then submerged plants are planted to form an underwater forest system, aesthetics and hydrophilicity are considered, and good demonstration and education effects are achieved.

The invention discloses a self-supporting sodium ion battery negative electrode material based on 3D printing and a preparation method thereof. The preparation method comprises the following steps: a,uniformly mixing matrix resin, chlorella and other raw materials; b, carrying out melt granulation and extrusion to obtain a wire rod; c, printing a three-dimensional electrode plate structure on carbon fiber prepreg cloth through an FDM 3D printing technology; and d, adsorbing a vanadium source by utilizing the electrode plate printed on the carbon fiber prepreg cloth, and carrying out drying and selenizing to obtain a self-supporting V / Se-chlorella derived carbon sodium ion battery negative electrode. The 3D printing technology is adopted, and a chlorella-containing wire is used as a printing material, so that the three-dimensional electrode plate structure with adjustable size and designable shape is prepared, and then, the vanadium source is introduced to the electrode plate to obtainthe self-supporting electrode plate structure with excellent performance; and secondly, the complex technological process where a conductive agent and a binding agent need to be added into a common powdery active material in the battery assembling process to form slurry, and then the current collector is coated with the slurry is avoided.

The invention relates to graphene composite slurry and a heating coating thereof, and preparation methods thereof, belonging to the technical field of electric heating. According to the invention, theweight percentage of a grinding dispersant in the graphene composite slurry is 1%-5%; the weight percentage of a carrier adhesive in the graphene composite slurry is 10%-80%; a graphene additive accounts for 3%-15% by weight of the graphene composite slurry; and a base material accounts for 16%-70% by weight of the graphene composite slurry. Through improvement of a raw material formula and improvement of a processing technology, the heating temperature of a graphene far-infrared heating technology is increased.

The invention provides a fuel cell flow field plate and a fuel cell, relates to the field of fuel cells, and is mainly suitable for hydrogen-air fuel cells and hydrogen-oxygen fuel cells. The flow field plate comprises an air inlet, an air outlet, a flow channel, a ridge, a groove and a boss, wherein the groove and the boss are formed in the bottom of the flow channel, are distributed at the bottom of a flow channel ditch along the flow channel direction and are respectively positioned on two polar plates. According to the flow field plate, the grooves and the bosses are arranged on the wall surfaces of the bottoms of the flow channels of the two polar plates respectively, and when the fuel cell is assembled, the grooves and the bosses are meshed with each other, so that the two polar plates cannot move relatively. The groove and boss structures in the flow channels divide the interface of the liquid drop and the wall of the flow channel, so that the effective contact area of the liquid drop and the wall of the flow channel is reduced, liquid water is prevented from forming a continuous water film, the discharge of the liquid water is facilitated, and the flooding phenomenon is relieved. And meanwhile, due to the existence of the groove and boss structures, airflow disturbance is further enhanced, the convective heat exchange area is increased, and the mass transfer and heat exchange capacity of a flow field is improved.

The invention relates to a homogeneous catalytic preparation method of gamma-valerolactone. The method comprises the step of reacting an acetylpropionic acid raw material with a hydrogen source raw material to obtain the product of gamma-valerolactone by using water as a solvent and with the existence of a water soluble iridium catalyst. By adopting the method disclosed by the invention, the defect that the existing preparation method of the gamma-valerolactone needs harsh reaction conditions of high temperature, high pressure, a lot of organic acid, a lot of organic base, and a lot of organic solvent is conquered, the economical efficiency and safety of the preparation method are improved, reaction is simple, catalyst is small in dose and can be repeatedly used, and the product is high in yield, easy to separate, and is quite high in industrial application value.

The invention provides a zinc-aluminium hydrotalcite rich in cuprous ions. The content of the cuprous ions is 0.14%-1.5%. Unit cells of the zinc-aluminum hydrotalcite provide ideal carriers for the high-activity cuprous ions, the stability of the cuprous ions in materials is improved, and the laminated coordination of the zinc-aluminum hydrotalcite can provide foundation for the realization of cuprous ion catalysis. For the first time, the zinc-aluminium hydrotalcite rich in the cuprous ions is applied to prepare ammonia by photocatalytic nitrogen and water adding, and the rate of synthesis ammonia is much higher than that of a conventional catalyst. In addition, the zinc-aluminium hydrotalcite rich in the cuprous ions is low in synthesis cost and simple in operation, mass production is facilitated, yield of the synthetic ammonia is high, and potential for large-scale application is achieved.

The invention provides a determination method and device of oil deposit water saturation. The determination method includes the steps that petrophysical parameters and seepage parameters are obtainedfrom oil deposit data; a longitudinal wave velocity field is determined according to seismic data; and a Biot equation is used for determine the oil deposit water saturation according to the oil deposit petrophysical parameters, seepage parameters, and determined longitudinal wave velocity field. According to the determination method and device, a petrophysics experiment, digital core experiment and well production record are used, other petrophysical parameters and seepage parameters in addition to the saturation related to longitudinal wave velocity and relation between the water saturationand the longitudinal wave velocity in the Biot equation are combined, and thus the oil deposit water saturation is determined. The determination method is short in time and high in operability, and large-scale application technology prospect is realized.

The invention provides an electrode plate activation method for a negative electrode based on passivation metal lithium powder. The electrode plate activation method comprises the following steps of uniformly coating a graphite electrode plate, which takes a copper sheet as a current collector, with a metal lithium powder-containing butadiene styrene rubber / methylbenzene solution through a coating machine to obtain a metal lithium powder / graphite / copper electrode plate; transferring the electrode plate to a glove box under protection of argon, and drying; performing rolling and activating on the dried electrode plate in the glove box under protection of argon by adopting a roller press; and preserving the rolled and activated electrode plate in the glove box under protection of argon for use. According to the electrode plate activation method, the rolling pressure loaded on the electrode plate is controlled through the roller press, the passivation layer-containing metal lithium powder is smashed through mechanical external force, and more metal lithium surfaces can be exposed, so that the electrochemical activity of the metal lithium powder can be improved, and the metal lithium powder-based lithium ion battery performance can be improved; and the electrode plate activation method has the characteristics of simple and environment friendly process, capability of realizing large-scale production easily, super-high electrochemical capacity per gram and the like.

The invention discloses an organic electrochemical transistor and a preparation method thereof. A conductive polymer nanowire array is distributed on a substrate; gold material electrodes serving as a source electrode and a drain electrode of the organic electrochemical transistor are arranged on the substrate and are located at two ends of the conductive polymer nanowire array; a liquid storage tank is arranged on the substrate; the conductive polymer nanowire array is arranged in a space defined by the liquid storage tank; electrolyte is injected into the liquid storage tank; the gold material electrodes are in insulated connection with the electrolyte; and a reference electrode serves as a grid electrode of the organic electrochemical transistor and is inserted into the electrolyte. The PEDOT: PSS nanowire array organic electrochemical transistor prepared by the method of the invention can be directly used for electrical testing and has good electrical properties. Compared with the performance of a traditional thin film type conductive polymer organic electrochemical transistor, the transconductance, muC *, response speed, stability and other properties of the organic electrochemical transistor are all superior. The preparation method is simple to operate and low in cost, and has the potential of large-scale application.