5484results about How to "Easy to prepare" patented technology

The invention belongs to the technical field of separation membrane materials, and provides a covalent organic framework membrane as well as a preparation method and application thereof. The preparation method comprises the following steps: preparing an organic phase solution containing a polyaldehyde monomer and a water phase solution containing a polyamine monomer; dropwise adding the organic phase solution to the aqueous phase solution for reaction, and dialyzing the solution after the reaction is finished to obtain a purified aqueous dispersion of the covalent organic framework nanosheet; and dispersing the aqueous dispersion, carrying out suction filtration to a hydrophilic support, and carrying out heat treatment and curing. The invention also discloses the covalent organic framework membrane prepared according to the method and application thereof. The covalent organic framework membrane is used for removing divalent ions in a saline solution. The covalent organic framework membrane disclosed by the invention has an ordered pore structure with a specific size and high ion selectivity; due to the strong covalent bond connection characteristic, the covalent organic framework film is endowed with acid and alkali resistance and high stability; the preparation method disclosed by the invention is simple, mild in condition and wide in application range.

The invention belongs to the technical field of copper-clad plates, and relates to a low-dielectric high-heat-resistance copper-clad plate and a preparation method thereof. By introducing the POSS resin, the dielectric constant of the copper-clad plate is effectively reduced, which is crucial for reducing signal delay and improving signal transmission efficiency. The introduction of the POSS resin not only improves the dielectric properties of the material, but also improves the glass transition temperature (Tg) of the material, which means that the physical and chemical properties of the material can be kept unchanged at a higher temperature, and the material is suitable for wider environmental conditions. By using the resin and the inorganic filler in a specific ratio, the copper-clad plate shows excellent copper foil peel strength, and ensures that the bonding force between the copper foil and the base material is not easily weakened under long-term use or severe conditions. Meanwhile, the material also has excellent CAF (conductive anode wire) resistance, can effectively prevent internal short circuit caused by moisture, and prolongs the service life of an electronic product.

The invention relates to a backside illuminated image sensor and a preparation method thereof, and an electronic device, and relates to the technical field of integrated circuits, and the method comprises the steps: providing a substrate which comprises an isolation layer and a plurality of first isolation structures which are arranged at intervals in a first direction parallel to the surface of the substrate; forming first isolation parts in the substrate, wherein the first isolation parts and the first isolation structures are arranged in a one-to-one manner and extend to the isolation layer through the back surface of the substrate; removing the substrate between the adjacent first isolation parts to obtain side wall semiconductor layers located on the side surfaces of the first isolation parts and first grooves between the adjacent side wall semiconductor layers; the size of the side wall semiconductor layer is gradually increased in the direction close to the isolation layer. And forming a bottom photosensitive layer in the first groove, and epitaxially growing a top photosensitive layer on the bottom photosensitive layer. And forming a second isolation part connected with the first isolation part in a gap between the adjacent top photosensitive layers, thereby improving the photoelectric conversion efficiency and the quantum efficiency.

The invention discloses solid-waste-based fluid-state solidified soil and a preparation method thereof, and belongs to the technical field of solid waste resource utilization. Raw soil is used as a base material, a curing agent composed of steel slag, granulated blast-furnace slag, gypsum, fly ash, aluminate and other industrial solid waste, a flocculating agent, a conditioning agent, a modifying agent, a stabilizing agent and a soil modifying agent are doped, and then the solid-waste-based fluid-state solidified soil is prepared. Adding water and stirring to form premixed flow-state solidified soil; comprising dry powder and water, and the mass ratio of the water to the dry powder is 0.65-0.75; the dry powder comprises the following components in parts by mass: 80-85 parts of raw soil, 10-15 parts of a curing agent, 2-5 parts of a flocculating agent, 0.5-1.5 parts of a conditioning agent, 1-3 parts of a modifying agent, 0.2-0.4 part of a stabilizing agent and 3-5 parts of a soil modifying agent. The solid-waste-based fluid-state solidified soil prepared by the method has the characteristics of high fluidity, high strength, relatively good water stability, low cost and the like, is beneficial to actual production, and conforms to a green development mode.

The invention provides a high-temperature-resistant carbon fiber reinforced phenolic resin composite material and a preparation method thereof. The preparation method comprises the following steps: firstly, carrying out high-temperature oxidation treatment on carbon fibers; secondly, carrying out surface modification on the carbon fibers by using a chemical modifier; then mixing the modified carbon fiber, an antioxidant and a dispersing agent to prepare slurry; performing vacuum filtration on the prepared slurry, and drying to obtain a carbon fiber blank; preparing a phenolic resin infiltration solution, and impregnating the carbon fiber blank with the phenolic resin infiltration solution; and finally, carrying out mold pressing and curing to obtain the high-temperature-resistant carbon fiber reinforced phenolic resin composite The preparation method is simple in required equipment, convenient to operate, stable in process, high in production efficiency and suitable for large-scale industrial production. According to the high-temperature-resistant carbon fiber reinforced phenolic resin composite material prepared by the preparation method, the bonding property between the carbon fiber and the phenolic resin is improved, certain toughness and strength are provided, and meanwhile, the high-temperature-resistant carbon fiber reinforced phenolic resin composite material has the advantages of ablation resistance, good oxidation resistance in a high-temperature environment and the like.

The invention discloses a bio-based foam adsorption material as well as a preparation method and adsorption application thereof. The bio-based polymer is used as a foam skeleton, the adsorbent with a large specific surface area is added to further improve the foam adsorption capacity, the cross-linking agent and the reinforcing filler improve the overall strength of the foam, and the bio-based foam adsorption material with the high adsorption capacity is obtained. The bio-based foam disclosed by the invention is light in weight, controllable in hydrophilicity and hydrophobicity, and capable of separating and removing pollutants such as oil and organic dye. The foam has high adsorption capacity and good cyclic adsorption capacity, can be repeatedly used, is biodegradable, does not pollute the environment, can effectively adsorb dangerous chemicals existing in a water body, does not cause secondary pollution, and can be used for decontamination treatment of organic pollutants in industrial wastewater.

The invention belongs to the technical field of sodium ion batteries, and particularly relates to a calcium ion doped modified sodium ion positive electrode material and a preparation method thereof, a positive electrode plate and a half battery. The calcium ion doped modified sodium ion positive electrode material comprises a sodium source, a doping source and a precursor, and is characterized in that the chemical general formula of the positive electrode material is Na < 1-x > M < x > Ni Fe Mn < c > O < 2 >, the value range of the doping sources M and x is x < = 0.05, a + b + c = 1, and all elements in the chemical formula meet charge balance. Sodium sites in a layered structure are replaced by calcium ion doping, so that interlayer spacing is enlarged, sodium ion transmission kinetics is enhanced, and adverse phase change is inhibited. The sodium ion positive electrode material shows high specific capacity and excellent cycle stability, the capacity retention ratio is 93.03% after 100 times of cycle charge and discharge at 1C, and the sodium ion positive electrode material has the characteristics of simple preparation, low cost, high specific capacity and excellent cycle performance.

The invention discloses a preparation method of injectable nano composite hydrogel for relieving osteoarthritis, which comprises the following steps: firstly, synthesizing nano rod-like hydroxyapatite with the length of 150-300 nm and the diameter of 10-15 nm, and the hydroxyapatite is hydrophilic hydroxyapatite doped with strontium and europium ions; the preparation method comprises the following steps: by taking Ca (NO3) 2, Sr (NO3) 2, Eu (NO3) 3 and soluble phosphate as main raw materials, carrying out hydrothermal reaction to prepare strontium and europium ion co-doped hydrophobic hydroxyapatite, dispersing the strontium and europium ion co-doped hydrophobic hydroxyapatite in a Tris-HCl buffer solution, adding tannic acid, stirring, centrifugally collecting precipitate, and drying to obtain strontium and europium ion doped hydrophilic hydroxyapatite; the preparation method comprises the following steps: taking chondroitin sulfate and adipic dihydrazide as main raw materials, stirring, dialyzing, freeze-drying, and dissolving in a buffer solution to obtain the chondroitin sulfate solution grafted with the hydrazide group; the preparation method comprises the following steps: taking hyaluronic acid, 3-aminophenylboronic acid and sodium periodate as main raw materials, stirring, dialyzing, freeze-drying, and dissolving in a buffer solution to obtain the phenylboronic acid group grafted oxidized hyaluronic acid solution; the preparation method comprises the following steps: blending hydrophilic hydroxyapatite doped with strontium and europium ions, a chondroitin sulfate solution grafted with a hydrazide group, an oxidized hyaluronic acid solution grafted with a phenylboronic acid group and a recombinant collagen solution, and stirring to obtain the injectable nano composite hydrogel. The injectable nano composite hydrogel obtained by the invention has good biocompatibility, and a favorable local immune microenvironment can be created to immunomodulate macrophages so as to relieve osteoarthritis and promote subchondral bone repair.

The invention provides a compound as shown in a formula I, or pharmaceutically acceptable salt, stereoisomer or tautomer thereof. The compounds have been demonstrated to be good GLP-1 receptor agonists. In addition, the compound is simple in preparation method and has a certain application prospect. # imgabs0 #

The invention discloses multifunctional hydrogel and application thereof, and belongs to the technical field of biological medicine. According to the multifunctional hydrogel, ketal mercaptan with two hydrazide ends and oxidized dextran are cross-linked to form a cross-linked network containing dynamic covalent bonds. The preparation method comprises the following steps: dissolving ketal mercaptan with two hydrazide ends in deionized water to obtain a ketal mercaptan solution, dissolving oxidized dextran in deionized water to obtain an oxidized dextran solution, mixing the ketal mercaptan solution with the oxidized dextran solution, and standing to obtain the multifunctional hydrogel. The multifunctional hydrogel has pH / ROS dual responsiveness, can respond to inflammation microenvironment and low pH of infectious wounds, remove active oxygen, release therapeutic drugs, regulate macrophage polarization and relieve bacterial infection, thereby playing a key role in inflammation, proliferation and remodeling stages of wound healing to accelerate wound healing. The curcumin-encapsulated liposome is added into the multifunctional hydrogel, so that the antibacterial effect can be further improved.

The invention discloses a method for preparing asphalt-based porous carbon based on an MgO template, and belongs to the technical field of porous carbon, nano MgO and deionized water are mixed and placed in a synthesis kettle, hydrothermal synthesis is performed at 180 DEG C for 2 h, suction filtration and drying are performed, a dried filter cake is crushed and calcined, and porous flaky MgO is obtained; adding the asphalt solution into the MgO suspension, stirring, drying to obtain brown powder, transferring the brown powder into a corundum crucible, putting the corundum crucible into a tubular furnace, calcining to obtain a carbonized C / MgO composite material, and washing the carbonized C / MgO composite material with a diluted hydrochloric acid solution and deionized water to obtain a carbon material sample recorded as AC-75. Pouring the porous carbon material PCs and KOH into a mortar, fully grinding, mixing and calcining to obtain an activated product, pickling and washing the product to be neutral, and drying to obtain the porous carbon material PCs. The raw materials selected by the method are asphalt and flake magnesium oxide which are stable in performance, low in price, large in amount and easy to obtain, a magnesium source can be recycled, environmental protection is achieved, and resources are saved.

The invention discloses a high-biocompatibility pH response type Pickering emulsion and a preparation method thereof, and relates to the technical field of food and materials. An interfacial film with high mechanical strength is constructed by adopting electrostatic interaction and hydrophilic-hydrophobic complementary characteristics between the hydrophobic shellac nanoparticles carrying negative charges and the hydrophilic cationic colloidal particles carrying positive charges, and the prepared emulsion has good viscoelasticity and stability. In addition, due to the unique solubility of the shellac nanoparticles, the Pickering emulsion prepared by the preparation method disclosed by the invention has excellent pH responsiveness. The preparation method of the Pickering emulsion is convenient and simple, the stabilizer is wide in source and low in price, the biocompatibility of the emulsion is high, and the Pickering emulsion has wide application prospects in the aspects of food, medicine, materials and the like.

The back contact solar cell comprises a silicon substrate, a first passivation layer, a protection layer, a first electrode and a second electrode, the silicon substrate is provided with a first surface and a second surface which are opposite to each other, and one side of the second surface of the silicon substrate is provided with a P-type conductive region and an N-type conductive region which are arranged at intervals; the first passivation layer is arranged on the first surface of the silicon substrate, the protection layer is arranged on the side, away from the silicon substrate, of the first passivation layer, the first electrode is electrically connected with the P-type conductive region, and the second electrode is electrically connected with the N-type conductive region. The protection layer can prevent other stacked back contact solar cells or other objects from making contact with the surface of the first passivation layer, and the surface of the first passivation layer is prevented from being scratched or damaged by other objects, so that the passivation effect of the first passivation layer on the first surface is guaranteed, and the photoelectric conversion efficiency of the back contact solar cells is improved. In addition, due to the arrangement of the protective layer, the surface of the first passivation layer can still be well protected when the multiple back contact solar cells are stacked irregularly, and an isolation part does not need to be additionally arranged between every two adjacent back contact solar cells in the sorting and collecting process. The sorting and collecting efficiency of a plurality of back contact solar cells can be improved, the structure is simple, preparation is convenient, and the preparation cost is saved.

The invention relates to a flexible electrochemical pH sensor as well as a preparation method and application thereof. Wherein the flexible electrochemical pH sensor comprises a flexible nanofiber substrate as well as a working electrode and a reference electrode which are arranged on the surface of the flexible nanofiber substrate at an interval, the working electrode comprises a first working part and a first wire part connected with the first working part, and the first working part is provided with a polyaniline sensitive layer. The flexible electrochemical pH sensor has the characteristics of high sensitivity, good flexibility and good air and moisture permeability, can be tightly attached to the surface of skin to monitor the pH value of body fluid, and is high in monitoring accuracy and simple in manufacturing method.

The invention discloses a preparation method and application of a zinc-manganese bimetal organic framework derived composite nano-enzyme, and belongs to the technical field of nano-materials. Zinc-manganese bimetal organic framework nanoparticles prepared by reacting ZIF-8 with manganese (III) acetylacetonate are used as a template, and are calcined at different temperatures in a tubular furnace to obtain zinc-manganese bimetal organic framework derivative composite nano-enzymes with different morphologies. The nano enzyme has peroxidase-like activity, glutathione peroxidase-like activity and catalase-like activity, and has a wide application prospect in anti-tumor treatment.

The invention relates to a preparation method and application of an inner-rigid outer-soft core-shell structure silicon dioxide blocking agent for marine drilling fluid, and belongs to the field of deepwater oil and gas drilling. N-vinyl-2-pyrrolidone, dimethyl diallyl ammonium chloride, acrylamide and 2-acrylamide-2-methylpropanesulfonic acid are polymerized and grafted on the surface of nano silicon dioxide to form the silicon dioxide blocking agent with a core-shell structure and a rigid inside and a soft outside; by means of rigid plugging of a nano material and deformation filling flexible plugging of a high-molecular polymer, shale micro-nano pores are efficiently plugged with rigid inside and flexible outside, so that the stability of a well wall is maintained, meanwhile, secondary generation of hydrates is effectively inhibited, and the safety and efficiency of deepwater drilling are improved; the plugging agent provided by the invention reduces the demand on a large number of thermodynamic inhibitors, not only saves the cost, but also has the characteristic of environmental protection.

The invention discloses a tea fertilizer preparation method based on microbial fermentation, and particularly relates to the field of tea compost, tea waste is crushed and wetted, and a nitrogen source and trace elements are added to optimize the carbon nitrogen ratio, so that a foundation is laid for the fermentation process; then, selected microbial strains are proliferated and purified, and the treated waste materials are uniformly inoculated with the selected microbial strains; in the fermentation process, the stability of fermentation conditions is ensured by controlling the temperature and the humidity; the tannin concentration and the pH value are monitored in real time, when the tannin concentration exceeds a preset value and the pH deviates from a normal range, the abnormal state of tannin degradation is evaluated and identified through a reaction activity index, an interference source is positioned through a sparse principal component analysis algorithm, and noise signals are removed; and after the interference source is positioned, the fermentation condition is adjusted in a targeted manner, so that the tannin degradation efficiency reaches the expectation, and the compost is maturely fermented and meets the fertilizer use standard.

The invention relates to the technical field of sodium ion battery research and development, and particularly discloses a strong-oxidizing acidified asphalt-based hard carbon negative electrode material and a preparation method and application thereof, concentrated nitric acid or concentrated sulfuric acid is introduced into asphalt as a cross-linking agent, so that the cross-linking reaction among molecules can be promoted under a low-temperature condition, and the structural stability of the material is greatly improved. Compared with a traditional method, the method has the advantages that the technological process is simplified, only one-step pretreatment is needed before carbonization, and energy consumption and pollution caused by high temperature can be avoided. According to the liquid phase cross-linking strategy, through reconstruction of chemical bonds, the low-softening-point asphalt can form a more compact carbon precursor network structure at low temperature, and formation of a high-performance hard carbon material in the subsequent carbonization process is facilitated.

The invention discloses a protein-based hydrogel adsorption material and application thereof in repairing water and soil heavy metal pollution, polysaccharide is doped into protein hydrogel to prepare the hydrogel adsorption material which is good in toughness, high in porosity and rich in surface adsorption functional groups. The heavy metal contaminated water and soil can be effectively adsorbed and efficiently recycled, especially for the heavy metal contaminated soil, the heavy metal contaminated soil is coated with the heavy metal contaminated water and soil adsorbent, the heavy metal contaminated soil is covered with the heavy metal contaminated water and soil adsorbent, in-situ remediation of the contaminated soil is achieved, meanwhile, the thin film is removed after remediation, and the risk of secondary overflow is thoroughly avoided. Results show that the protein-based hydrogel adsorbing material can efficiently remove different heavy metal pollutants, and after different treatments, the corresponding agricultural soil land control level can be reached. Moreover, no nutrient loss is observed in the treated soil, and no secondary toxic product is generated, so that the method has relatively high sustainability and agricultural application feasibility.

The invention discloses a low-density low-viscosity polyurethane pouring sealant containing plastic microspheres and a preparation method thereof. The pouring sealant comprises a component A and a component B, the component A comprises the following components in parts by weight: 25-40 parts of castor oil polyol and 9-24 parts of modified castor oil polyol containing a benzene ring structure; 15 to 22 parts of polyester polyol; 10 to 17 parts of plastic microspheres; 12-16 parts of a liquid flame retardant; 0.2 to 0.3 part of an amine catalyst; 0.3 to 0.4 part of a metal catalyst; 0.1 to 0.4 part of a coupling agent; 0.1 to 0.4 part of a defoaming agent; 2-6 parts of a dewatering agent; wherein the ester polyol is Zibo charge beauty CM-1830 polyester polyol. The two-component polyurethane pouring sealant with low viscosity, low density and better mechanical property is prepared by selecting the polyester polyol in the component A and selecting and proportioning other components.

The invention relates to the technical field of carbon monoxide oxidation catalysts, and discloses a sulfur-tolerant noble metal-based CO oxidation catalyst as well as a preparation method and application thereof. The preparation method of the catalyst comprises the following steps: dipping a carrier in an aqueous solution containing a noble metal precursor and an auxiliary agent precursor, and then drying and roasting to obtain a catalyst matrix; carrying out pre-reduction treatment on the catalyst matrix in a hydrogen-containing atmosphere to obtain a catalyst intermediate; carrying out induced activation on the catalyst intermediate in an atmosphere containing CO and H2S; wherein the carrier is at least one of titanium dioxide, cerium dioxide, aluminum oxide and zirconium dioxide, and the metal element in the auxiliary agent precursor is at least one of Fe, Co and Ni. The catalyst prepared by the method provided by the invention can realize the high-selectivity oxidation process of H2S species, inhibits the adsorption of S species and the formation process of sulfate, and realizes the high-conversion-rate oxidation reaction of carbon monoxide in the presence of H2S.

The invention belongs to the field of catalyst preparation, and provides a preparation method for rapidly synthesizing a self-supporting high-entropy alloy difunctional electrocatalyst through Joule heat. The prepared FeCuRu-coated Ni1Co1-TPA is benefited from rich active sites, and the high conductivity of effective electron transfer and transmission is achieved. The catalyst shows excellent HER and OER catalytic performance under an alkaline condition, and the current density of 500mA cm <-2 > can be realized by only needing overpotentials of 120mV and 350mV, which is superior to those of a standard noble metal catalyst Pt / C and RuO2. In addition, when the composite material is used as a bifunctional electrocatalyst for electrolyzing water, the composite material shows excellent catalytic activity for electrolyzing water. The method has important significance for realizing the social renewable development target and developing clean and sustainable energy resources to replace fossil fuel.

The invention belongs to the technical field of solid waste and mineral recycling, and particularly relates to a method for preparing a carbon-silicon material by cooperatively treating solid waste and mineral through microorganisms, which comprises the following steps: carrying out crushing and acid leaching pretreatment on silicon-containing solid waste / mineral to obtain a treated solid reactant; mixing with agricultural and forestry wastes, and naturally fermenting to obtain an organic-solid waste / mineral complex; treating the organic-solid waste / mineral complex by adopting a segmented heating carbon thermal reduction method to obtain a silicon carbide material; or reducing the organic-solid waste / mineral complex by adopting a magnesiothermic reduction method to obtain the silicon powder material. Microbiota generated by composting and silicon-containing solid wastes / minerals are mixed and cultured, organic matters and the silicon-containing solid wastes / minerals are decomposed, the silicon-containing solid wastes / minerals are decomposed and pores are formed by utilizing the decomposition effect of the microbial flora, and meanwhile, organic matters such as agricultural and forestry wastes are decomposed into micromolecular soluble organic matters by utilizing microorganisms; and further dissolving impurity elements in the silicon-containing solid waste / mineral to realize silicon purification.

The invention relates to the technical field of high polymer materials, and discloses rosin-based bio-based ultraviolet curing resin as well as a preparation method and application thereof. The structural formula of the rosin-based bio-based ultraviolet curing resin provided by the invention is shown as a formula (I). The ultraviolet curing resin has a tricyclic diterpene rigid structure and carbon-carbon double bonds, has good crosslinking density, adhesion property, mechanical property and thermal stability after being cured into a film, and can be applied to the fields of adhesives, sealants or ultraviolet curing coatings and the like. The ultraviolet curing resin is prepared by taking a bio-based material as a raw material, and the preparation method is simple, green and environment-friendly. # imgabs0 #

The invention provides a novel strain M2108 of a salt-tolerant bacillus, the preservation number of the salt-tolerant bacillus is CGMCC (China General Microbiological Culture Collection Center) No.28283, and the novel strain M2108 of the salt-tolerant bacillus has relatively good salt tolerance and can grow and proliferate in a high-salt environment; the strain can be rapidly and stably colonized in a plant, and is rapid in propagation speed and strong in multiplication capacity in the plant. The new strain M2108 of the salt-tolerant bacillus provided by the invention has a treatment effect and a high control effect on various plant diseases: the control effect on diseases such as tomato root rot, damping-off and damping-off caused by fusarium oxysporum, pythium aphanidermatum and rhizoctonia solani is high, and the average control effect is 91.2% or above. When being used for preventing and treating plant diseases, the salt-tolerant bacillus M2108 is not easy to generate drug resistance, has good drug effect durability, is safe to human and livestock, and does not cause environmental pollution; the salt-tolerant bacillus M2108 microbial agent and the biocontrol agent provided by the invention are simple in preparation method, low in cost and simple and convenient to use. The salt-tolerant bacillus M2108 has a good application prospect in the prevention and control of plant diseases, and lays a foundation for the development of efficient and broad-spectrum biocontrol preparations.

The invention discloses a pyridyl anti-aging agent as well as a synthesis method and application thereof, the anti-aging agent is obtained by taking 5-nitro-N-phenylpyridine-2-amine synthesized by 2-chloro-5-nitropyridine and aniline and iodide synthesized by alcohol and iodine as raw materials, and reacting in the presence of a hydrogen source and a catalyst. The anti-aging agent provided by the invention can effectively slow down the emigration speed of the anti-aging agent in rubber and greatly improve the phenomenon that the appearance of a tire becomes red, has one more N heteroatom than other anti-aging agents in the structure, has good oxidation resistance and flex cracking resistance, and is high in anti-ozone activity, environment-friendly and small in pollution.

The invention provides a method for preparing a ceramic bond through solution heat preservation and a superhard grinding tool. The ceramic bonding agent prepared through a solution heat preservation method is fine in powder granularity and low in sintering temperature and contains a certain amount of crystals, the bonding agent has high impact resistance and self-sharpening performance due to existence of the crystals, and the prepared superhard ceramic grinding tool has the performance of high strength and good sharpness. The method has the advantages of short binding agent preparation period, low equipment investment cost, simplicity in operation and the like. The preparation method of the ceramic bond provided by the invention is not reported.

The invention discloses a high-entropy perovskite oxide catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysts. The chemical general formula of the high-entropy perovskite oxide catalyst is La (MMN) O3, and M is a transition metal element with high electronegativity. M is a mixture of Ni, Cu, Co and Fe elements. The molar ratio of La to Ni to Cu to Co to Fe to Mn is (0.9 to 1): (0.15 to 0.25): (0.15 to 0.25): (0.15 to 0.25): (0.15 to 0.25): (0.15 to 0.25): (0.15 to 0.25). The La (MMN) O3 catalyst is of a rod-shaped structure formed by stacking particles. According to the high-entropy perovskite oxide catalyst as well as the preparation method and the application thereof, the B site of perovskite is doped by the high-electronegativity transition metal element, so that the Mn-O covalence is enhanced, and the catalytic performance is improved; the catalyst is prepared in an electrostatic spinning and calcining mode, a rod-shaped structure with accumulated nano-particles is obtained, the surface area of the catalyst is increased, and the catalytic effect is improved.

The invention discloses a low-temperature sintering asymmetric porous silicon carbide ceramic membrane separation layer and a preparation method thereof, the preparation method comprises the following steps: a) preparation of a coating liquid: firstly dispersing a binder in a solution, adding silicon carbide particle powder, carrying out magnetic stirring dispersion for a period of time, then adding a dispersant, and stirring; then putting the stirred and mixed film coating liquid and the grinding balls into a ball milling tank for ball milling; and adjusting the pH value of the ball-milled silicon carbide coating liquid with ammonia water, and carrying out vacuum defoaming to finally obtain the high-stability and uniformly-dispersed silicon carbide coating liquid. Wherein the addition amount of the silicon carbide coarse particles is 0.5-50 wt% of the mass of silicon carbide; b) coating; c) drying; and d) sintering. The asymmetric porous silicon carbide ceramic membrane prepared by the method is low in sintering temperature, and the prepared separation layer membrane is controllable in pore size and uniform in pore size distribution; the method has excellent application prospects in the field of membrane separation.

The invention relates to the technical field of electronic elements, in particular to a ternary compound for a memristor array and a preparation method of the ternary compound. The ternary complex comprises A, B and C, A is a guest molecule of a pyridine derivative with an amino terminal, B is a bridging molecule, and C is a host molecule with a cucurbituril structure. A, B and C are self-assembled in an aqueous solution through Van der Waals force and hydrophobic interaction among molecules to form a ternary complex; the host molecule C has a barrel-shaped cavity structure, and the guest molecule A and the bridging molecule B are included in the barrel-shaped cavity structure. The ternary complex forms a supramolecular chain junction at the end part of the graphene electrode, so that the graphene electrode with different gaps can be adapted, and the molecular connection success rate of the array is greatly improved. The preparation method of the ternary complex is simple, convenient, easy to operate and suitable for large-scale production.