241 results about "Zinc nitrate" patented technology

The invention provides a technical application method for strengthening oxidation performance of Fenton reaction by a defect-rich carbon-based cocatalyst, and relates to the technical field of advanced oxidation catalysts for sewage treatment. Zinc nitrate and 2-methylimidazole are assembled in a methanol solution through a template method, a ZIF-8 material is obtained after centrifugal cleaning, the ZIF-8 is further carbonized through pyrolysis, Zn element is evaporated in the pyrolysis process, a porous and defect-rich carbon-based cocatalyst is obtained, the porous and defect-rich carbon-based cocatalyst is introduced into a Fenton oxidation system, circulation of Fe < 3 + > / Fe < 2 + > in the Fenton reaction can be efficiently promoted, and the catalytic activity of the catalyst is improved. Fe < 2 + > regeneration is enhanced, and the generation capability of active species of a Fenton reaction system is enhanced, so that the removal efficiency of pollutants in water is improved.

The invention discloses ternary synergistic nano-enzyme hydrogel as well as a preparation method and application thereof, and relates to the technical field of biomedical materials. The preparation method comprises the following steps: dissolving zinc nitrate hexahydrate and ferric nitrate nonahydrate in methanol; dissolving 2-methylimidazole in methanol, adding into a metal salt solution, stirring, and sequentially centrifuging, washing and drying to obtain Fe / ZIF-8 nano-enzyme; the preparation method comprises the following steps: adding methacrylated gelatin and hyaluronic acid into deionized water, stirring, cooling to room temperature, and refrigerating to obtain a GelMA-HA precursor solution; and adding the Fe / ZIF-8 nano-enzyme into the GelMA-HA precursor solution, stirring, injecting into a mold, and carrying out ultraviolet light cross-linking curing to obtain the ternary synergistic nano-enzyme hydrogel. According to the hydrogel disclosed by the invention, active oxygen is efficiently removed and oxygen is produced through Fe / ZIF-8 nano-enzyme, and cartilage repair is promoted in combination with lubrication and slow release functions of gelatin hydrogel, so that a new strategy is provided for treatment of osteoarthritis.

The invention discloses a self-lubricating aluminum coating and a preparation method thereof.The preparation method comprises the steps that molybdenum disulfide is pretreated through a silane coupling agent, tetraethoxysilane mixed liquor is added, the pH is adjusted to be 9-10, a water bath reaction is conducted, and molybdenum disulfide-silicon dioxide microcapsules are obtained after high-temperature strengthening treatment; respectively adding a zinc nitrate solution and a hexamethylenetetramine solution, adjusting the pH value to 10-11, carrying out a high-temperature and high-pressure hydrothermal reaction to obtain zinc oxide nanorods, and carrying out ball milling treatment on the zinc oxide nanorods, microcapsules, stearic acid and zirconium oxide balls under the protection of argon to obtain doped microcapsules; after raw materials are pretreated, the raw materials and a dispersing agent solution are added into a mixer respectively, spraying powder, a pretreated base body and the spraying powder are obtained after mixing treatment, spraying treatment is conducted on the surface of the base body through a plasma spraying method, and the self-lubricating aluminum coating is obtained after vacuum annealing treatment. Therefore, the obtained self-lubricating aluminum coating is low in friction coefficient, high in performance and excellent in self-lubricating property.

The invention relates to the technical field of catalyst preparation, in particular to a preparation method of a modified catalyst and application of the modified catalyst in methanol regeneration in methane conversion, and the preparation method comprises the following steps: S1, mixing zinc nitrate, urea, a mesoporous regulating agent and deionized water, and stirring under a water bath condition; s2, aging the mixed solution obtained in the step S1 at 68-70 DEG C for 2-3 hours, centrifugally separating, washing the solid with deionized water until the solid is neutral, washing with absolute ethyl alcohol, and drying to obtain precursor powder; and S3, ball-milling and mixing the precursor powder, urea and the load modifier for 20-30 minutes, calcining in a muffle furnace in an air atmosphere, naturally cooling, grinding, and sieving with a 200-mesh sieve to obtain the nitrogen-doped modified catalyst. Aiming at the field of preparing high-value chemicals from methane through photocatalysis, the invention provides a method for inhibiting the peroxidation of methane by constructing chemical bonds to solve the problem of generating carbon dioxide by peroxidation of methane, and provides a new method for solving the problem of peroxidation of methane.

The invention relates to the technical field of batteries, in particular to a core-shell material, a preparation method, a negative electrode material and a battery. The method provided by the invention comprises the following steps: processing metal salt raw materials of aluminum, iron, cobalt, nickel, zinc and lanthanum into a high-entropy metal oxide; taking silicon particles as a core layer, gasifying a high-entropy metal oxide, and depositing the gasified high-entropy metal oxide on the surface of the core layer to form a coating layer so as to obtain Si (at) HEO particles; depositing a zinc layer on the Si-coated HEO particles to form a growth layer on the surface of the coating layer, dispersing the Si-coated HEO particles in a Si-coated HEO solvent, adding a zinc nitrate aqueous solution and a 2-methylimidazole aqueous solution for reaction, and growing a shell layer on the growth layer on the surface of the coating layer to obtain Si-coated HEO-ZIF particles; and mixing the acidic solution and the Si (at) HEO (at) ZIF particles to form a secondary pore channel, and separating to obtain the core-shell material. The core-shell material provided by the invention solves the problems of low stress dispersion efficiency, low ion transmission and poor volume expansion rate of the existing core-shell material.

The invention discloses a catalyst for preparing trichlorosilane and a catalytic preparation method of trichlorosilane. The catalyst is prepared from the following components in percentage by mass: weighed copper nitrate, zinc nitrate, aluminum nitrate, lanthanum nitrate and the balance of a carrier, the preparation method comprises the following specific steps: S1, filling a catalyst; S2, purifying raw material gas; S3, reacting; and S4, separating and purifying a product, namely discharging a reacted gas product from an outlet of a reactor, and condensing through a condenser. In the prepared catalyst, the activity and selectivity of the catalyst are remarkably improved through the synergistic effect of the copper-zinc-aluminum composite oxide and the rare earth element lanthanum, the electronic structure and the surface acid-base property of the catalyst can be adjusted through doping of lanthanum, the reaction of silicon powder and hydrogen chloride is promoted, meanwhile, side reactions are inhibited, and the service life of the catalyst is prolonged. And the yield of trichlorosilane is improved.

The invention relates to the technical field of supercapacitors, and particularly discloses a spherical hollow multi-layer high-entropy metal oxide and a preparation method and application thereof. The spherical hollow multi-layer high-entropy metal oxide is prepared by the following steps: cross-linking metal cation nitrate comprising iron nitrate nonahydrate, zinc nitrate hexahydrate, copper nitrate hexahydrate, cobalt nitrate hexahydrate and nickel nitrate hexahydrate with dextrose monohydrate to generate spherical high-entropy metal hydroxide FeZnCuCoNi-HO with a solid core structure, and annealing to induce the metal hydroxide. And the spherical hollow multi-layer high-entropy metal oxide is formed. Compared with the prior art, the high-entropy metal oxide is prepared through a low-energy-consumption and simple synthesis method, the problem of volume change of the high-entropy metal oxide serving as an electrode material in the circulation process is solved, more reaction active sites are provided, an ion diffusion path is improved, and the specific capacitance of the composite material is improved while the specific capacitance of the composite material is improved. And the stability of the material is maintained, so that the energy storage performance of the supercapacitor is improved.

The invention belongs to the field of antibacterial materials, and discloses a preparation method of a composite material modified carbon-nitrogen material as well as a product and application of the composite material modified carbon-nitrogen material. In order to achieve the long-acting and efficient antibacterial performance of the nano material, g-C3N4 powder is taken and placed in methyl alcohol, zinc nitrate is added, stirring is conducted till the zinc nitrate is dissolved, then the mixture is mixed with a methanol solution of 2-methylimidazole, after the mixture is subjected to heat treatment, the mixture is mixed with a polyhexamethylene biguanide hydrochloride aqueous solution, and the nano material is obtained. A compact inert material protection layer can be grown on the surface of the material by adopting an atomic layer deposition technology. The method provided by the invention is simple to operate and can be used for batch production, the obtained composite material integrates the advantages of an organic antibacterial agent and an inorganic antibacterial agent and has long-acting and efficient antibacterial performance, and the antibacterial material obtained by the method can be applied to various fields, such as antibacterial performance modification of antibacterial plastics and textiles.

The application provides a zinc phosphide negative electrode material, which comprises a zinc sheet substrate and a zinc phosphate protective layer; the zinc phosphate protective layer is obtained in situ on the surface of the zinc sheet by immersing the zinc sheet in a phosphoric acid solution; the phosphoric acid solution comprises phosphoric acid, zinc oxide, sodium fluoride, zinc nitrate, sodium perchlorate, organic ammonium and ammonia water. The zinc phosphide negative electrode material has good reversible deposition / dissolution performance, excellent energy storage performance, high stability and can be stably cycled for a long time.

The application discloses a method for synthesizing a single-atom catalyst, which comprises the following steps of mixing raw materials: taking dimethyl imidazole, zinc nitrate and graphene oxide as solutes, and taking anhydrous methanol as a solvent to form ZIF-8@GO through stirring; taking ZIF-8@GO and thiourea as solutes, and taking anhydrous methanol as a solvent to form S / ZIF-8@GO through stirring and adsorption; first-stage pyrolysis: pyrolyzing S / ZIF-8@GO in a protective gas atmosphere to form porous carbon (S, N-C); precursor preparation: after the porous carbon is cooled, phenanthroline (Phen) and a transition metal source (M) are added into the porous carbon to form a precursor M / S, N-C@Phen; and second-stage pyrolysis: pyrolyzing the M / S, N-C@Phen precursor in a protective gas atmosphere to obtain a M / S, N-C single-atom catalyst. The synthesis method is simple and effective, can be used for large-scale synthesis of a single-atom catalyst, is suitable for synthesis of various metal single-atom catalysts, and solves the problems of complexity in the prior art and difficulty in large-scale preparation.

The application discloses a kind of biochar with carbon fixation-carbon capture-in situ conversion function and its preparation method and application, the preparation method includes the following steps: after being washed with waste biomass water filtration, drying, with nitrogen source mixing grinding, be placed in tube furnace, in inert atmosphere sequentially pyrolysis carbonization and physical activation, after cooling nitrogen-doped biochar is obtained;Nitrogen-doped biochar is added to zinc nitrate solution, after stirring and mixing, drying is obtained with carbon fixation-carbon capture-in situ conversion function biochar.The carbon yield of biochar of the application is high, can effectively capture and fix source low concentration CO2, and in tetrabutylammonium bromide and oxidation styrene mixed solution, CO2 captured can be in situ converted into styrene cyclic carbonate, and significant carbon sequestration benefit and excellent carbon capture-in situ conversion effect are shown.

The present application relates to the technical field of catalyst production, in particular to a preparation method of a high-selectivity and high-stability methanol synthesis catalyst, comprising the following steps: step 1: dissolving zirconium nitrate, zinc nitrate and aluminum nitrate in water to form a zirconium-zinc-aluminum mixed salt solution A, dissolving zinc nitrate, aluminum nitrate and copper nitrate in water to form a copper-zinc-aluminum mixed salt solution B, dissolving sodium carbonate in water to form alkali solution C and alkali solution D; adding a small amount of alkali solution C into deionized water to form deionized water E; step 2: using the salt solution A, the alkali solution C and the deionized water E to form a precipitate 1, then using the salt solution B, the alkali solution D and the precipitate 1 to react to form a precipitate 2, then heating the precipitate 2, and aging the precipitate 2; step 3: after aging, filtering and washing the precipitate 2, drying the filter cake obtained by filtering, and then calcining and molding to obtain the methanol synthesis catalyst.

The application provides an in-situ liquid gel-forming water-retaining agent and a preparation method and application thereof. The water-retaining agent is composed of A component and B component which are applied in steps. The A component contains an aqueous solution of a natural modified polymer, and the natural modified polymer is selected from one or two of carboxymethyl chitosan, carboxymethyl cellulose or a sodium salt thereof. The B component contains an aqueous solution of a cationic crosslinking agent, and the cationic crosslinking agent is selected from one or more cations of copper nitrate, iron nitrate, zinc nitrate, manganese nitrate, chitosan quaternary ammonium salt, calcium nitrate and magnesium nitrate. The water-retaining agent can realize the integrated functions of slow release of trace elements, water retention, soil improvement and precise nutrition supply. Furthermore, the water-retaining agent is applied to crop growth in combination with the "step-by-step drip irrigation and in-situ gel formation" technology, so that the agronomic characters of crops can be significantly improved.

The application relates to a CuO-ZnO-ZrO2@CeO2 core-shell catalyst and a preparation method and application thereof in preparing methanol. The preparation method is as follows: copper nitrate and zinc nitrate are dissolved in deionized water to form a mixed solution, a precipitant is added, and hydrothermal reaction is carried out to obtain copper-zinc nanoscale dispersed particles; then the particles are dispersed in deionized water, a zirconium nitrate aqueous solution is added, and hydrothermal reaction is carried out to precipitate zirconium on the outer layer of the particles; then a cerium nitrate aqueous solution and a precipitant are added to the system, and hydrothermal reaction is carried out; after the reaction, the system is subjected to filtration, washing, drying, grinding and calcination to obtain the CuO-ZnO-ZrO2@CeO2 core-shell catalyst. In the application process, CO2 and H2 are used as raw materials, cyclohexanol is used as a solvent, hydrogenation reaction is carried out under the action of the core-shell catalyst at 190-210 DEG C, and methanol is prepared. The core-shell catalyst can be applied to hydrogen transfer hydrogenation for preparing methanol, and can exhibit excellent catalytic activity and stability and higher methanol selectivity.

This invention discloses a molybdenum-based slurry-bed hydrocracking catalyst for inferior oil, its preparation method, and its application method. The preparation method includes: mixing slurry-bed hydrocracking tailings with naphtha obtained from the process, separating and removing oil from the tailings to obtain a solid residue; calcining in air to obtain a solid powder; dissolving each gram of solid powder in 2-6 ml of ammonia water under stirring conditions, controlling the dissolution temperature at 50-100°C and dissolving for 1-6 hours to obtain a first mixture; filtering to obtain a solution; and... Under stirring conditions, a methanol solution of zinc nitrate and dimethylimidazole was added to the solvent; the reaction was carried out at room temperature for 4–12 h to obtain a second mixture; the mixture was filtered to obtain a precipitate; the precipitate was dried at 60–150 °C for 1–12 h to prepare a ZIF-8 coated molybdenum salt catalyst precursor; the ZIF-8 coated molybdenum salt catalyst precursor was calcined at 400–800 °C for 1–6 h in an oxygen-free atmosphere to obtain a molybdenum-based low-quality oil slurry bed hydrocracking catalyst.

This invention discloses a silicon-based anode binder for lithium-ion batteries and its preparation method, relating to the field of silicon-based anode technology. The method includes first ring-opening sulfonation of polyetheramine with 1,3-propanesulfonyl lactone in an aqueous phase to obtain sulfonated polyetheramine; then, polyacrylic acid is activated by EDC·HCl and NHS and then amidated and grafted onto the sulfonated polyetheramine to obtain sulfonated polyetheramine-grafted polyacrylic acid; finally, the aqueous solution of this graft is in-situ coordinated with 2-methylimidazole and zinc nitrate to generate ZIF-8 nanoparticles, and then succinic acid and choline chloride are added for regulation to obtain the binder. This invention achieves dual modification through molecular grafting of flexible sulfonated polyether segments and in-situ construction of a three-dimensional ZIF-8 conductive network, utilizing succinic acid and choline chloride to eliminate competitive coordination of active groups, significantly improving ionic conductivity and stabilizing the electrode structure.

The invention discloses a hydrothermal synthesis preparation method of ZnS hollow nanospheres, which is characterized in that zinc nitrate and thiourea are used as precursors, absolute ethyl alcohol and ethidene diamine are used as solvents, and the ZnS hollow nanospheres are directly prepared by controlling the reaction temperature, time and filling degree. The method is simple in process and low in cost, and the obtained product has application potential in photocatalysis and photoelectric device materials.

The invention discloses an organic pollutant water treatment adsorption material and a preparation method thereof in the technical field of water treatment materials. The organic pollutant water treatment adsorption material comprises the following components in parts by weight: 2-4 parts of a material monomer I, 3.5-7 parts of a material monomer II, 3.2-6.5 parts of ferric chloride hexahydrate, 0.36-1.0 part of copper nitrate trihydrate and 0.3-1.2 parts of zinc nitrate hexahydrate. Through full-chain collaborative design of monomer synthesis, multifunctional COF framework construction, magnetic modification and bimetallic active site loading, the bottleneck that a traditional adsorption material is low in capacity, slow in speed, difficult to recycle and poor in selectivity is broken through, the monomer I provides a high-density porphin ring, the monomer II constructs a high-porosity COF framework through multiple functional groups, and the adsorption material is prepared through magnetic modification. Cu < 2 + > / Zn < 2 + > and nitrogen atoms of the porphin ring form strong coordination active sites, and loading of the magnetic nanoparticles enables the density of the active sites to be perfectly matched with a pore structure, so that site waste or pore blockage is avoided.

The application belongs to the technical field of nanomaterials, and provides ascorbic acid oxidation mimetic enzyme and preparation thereof. The application adopts a methanol solution of zinc nitrate, copper acetylacetonate and 2-methyl imidazole to perform a hydrothermal reaction, and obtains the ascorbic acid oxidation mimetic enzyme by oxygen isolation calcination of a hydrothermal product. The copper-nitrogen-carbon nanomaterial obtained by the application has a rhombohedron structure, can specifically oxidize ascorbic acid, and can be applied to ascorbic acid content detection, oxidized ascorbic acid preparation and dehydroascorbic acid preparation as ascorbic acid oxidation enzyme mimetic enzyme. The nanomaterial can maintain ascorbic acid oxidation mimetic enzyme activity under acid, alkaline and high temperature conditions; the steady-state kinetic parameter (Michaelis constant is 0.012 mM) is better than that of natural ascorbic acid oxidation enzyme, and the ascorbic acid oxidation mimetic enzyme activity of the material has a broad application prospect in the fields of nanozyme, nanotechnology and biological analysis detection.

The invention belongs to the field of propane dehydrogenation catalysts, and particularly provides a spherical alumina carrier for propane dehydrogenation, a preparation method of the spherical alumina carrier and a catalyst.The preparation method of the spherical alumina carrier for propane dehydrogenation comprises the following steps that 1, pseudo-boehmite sol and polysaccharide are evenly mixed, and a precursor solution is obtained after curing; (2) dropwise adding the precursor solution into an oil ammonia forming column, and gelatinizing and curing to obtain gel balls; the upper layer of the oil ammonia forming column is a paraffin oil layer, and the lower layer is a composite ammonia water solution; the composite ammonia water solution comprises ammonia water, 2-formylphenylboronic acid and zinc nitrate; and 3) washing the obtained gel balls with deionized water and absolute ethyl alcohol, then transferring the gel balls into an aging solution for aging, filtering, washing, drying, and then roasting to obtain the catalyst. The catalyst prepared by the invention has the advantages of high catalytic activity and coking resistance.

The application discloses a kind of high-efficient durable water-resistant sandpaper suitable for humid environment and preparation method thereof, and high-efficient durable water-resistant sandpaper includes substrate layer, adhesive layer, abrasive layer;Adhesive layer is located in one side of substrate layer, and is formed by resin composition curing;Abrasive layer is formed by abrasive distribution, and one end of abrasive is embedded in adhesive layer;Abrasive surface has porous water-resistant interface layer formed by zinc imidazole ester frame;The porous water-resistant interface layer is obtained by forming zinc imidazole ester frame by the reaction of abrasive in zinc nitrate and 2-methyl imidazole methanol solution, whereby the sandpaper of the present application is through the synergistic effect of mechanical interlocking, chemical bonding, hydrophobic inhibition and stress buffering between abrasive and adhesive layer, solve the problem that abrasive and adhesive layer combination interface of sandpaper are softened by water, leading to non-normal shedding of abrasive, service life is reduced, and polishing effect is poor, so that the sandpaper of the present application has the polishing performance of adapting to humid environment, high efficiency and durability.

The invention discloses a load ICGamp. The invention discloses ZIF-8 nano-particles of CBF, and belongs to the technical field of preparation of nano-drug particles. The multifunctional nanoparticles are formed by simultaneously encapsulating indocyanine green (ICG) and cinobufagin (CBF) components by ZIF-8, and the drug loading capacities of the two drugs are both not lower than 5%. The preparation method comprises the following steps: slowly adding a solution containing cinobufagin and zinc nitrate into a mixed solution containing indocyanine green, bovine serum albumin and 2-methylimidazole, and carrying out centrifugal filtration, washing and drying on a reaction product to obtain the cinobufagin zinc oxide. The multifunctional nano-particles prepared by a one-step synthesis method are uniform in particle size and good in stability, indocyanine green and cinobufagin are uniformly distributed in a carrier, the multifunctional nano-particles have pH and near-infrared light dual response drug release characteristics, triple synergy of chemotherapy, photothermal therapy and photodynamic therapy can be realized, and the multifunctional nano-particles are simple in preparation process and suitable for popularization and application.

The invention belongs to the technical field of antibacterial photodynamics, and provides antibacterial photodynamics for treating periodontitis by regulating ROS (reactive oxygen species) through microenvironment response and a preparation method of the antibacterial photodynamics. Comprising the following steps: preparing tin sulfide oxide by taking sodium dodecyl benzene sulfonate, tin chloride pentahydrate and L-cysteine as raw materials; zinc nitrate, copper nitrate, urea and thioacetamide are used as raw materials to prepare nano-enzyme; the antibacterial photodynamic material is prepared by taking indocyanine green, bacterial targeting peptide, nano enzyme, tin sulfide oxide and dihydromyricetin as raw materials. The microenvironment response antibacterial photodynamic force aiming at periodontitis infection and treatment characteristics is constructed, the antibacterial photodynamic force is constructed by a strategy of combining bacterial infection microenvironment response ROS programmed regulation and control, precise and long-acting treatment and immune regulation and control, and the curative effect and scene of the antibacterial photodynamic force for treating periodontitis are improved and widened.

The invention belongs to the technical field of catalysts, and discloses a preparation method and application of a catalyst for hydrogen production through ethanol cracking and acetaldehyde as a byproduct. The preparation method comprises the following steps: dissolving copper nitrate trihydrate, zinc nitrate hexahydrate and nickel nitrate hexahydrate in deionized water, then adjusting the pH value to 10.5-12.5 by using ammonia water, stirring for 30-40 minutes, then adding alkaline silica sol, stirring for 2-2.5 hours, then adding a tetraethoxysilane solution and a molybdenum disulfide quantum dot colloidal solution, stirring for 2-2.5 hours, carrying out rotary evaporation and drying, and roasting for 6 hours in an air atmosphere of 550 DEG C to obtain a molybdenum disulfide quantum dot precursor; and finally, heating to 300 DEG C in a nitrogen atmosphere, and reducing for 5 hours at 300 DEG C in a mixed atmosphere of hydrogen and nitrogen to obtain the catalyst. The prepared catalyst has excellent activity, selectivity and stability. Therefore, the method has a wider application prospect in the field of hydrogen production by ethanol cracking and acetaldehyde as a byproduct.

This invention discloses a photoelectrocatalyst and its preparation method, wherein the photoelectrocatalyst comprises Zn 2+ Ce 4+ Au; Zn 2+ Including ammonium acetate, zinc nitrate, and hexamethylenetetramine; Ce 4+ Including cerium nitrate, ammonium chloride, and potassium chloride; Au includes PVP, sodium citrate, potassium bromide, and chloroauric acid; Zn 2+ Ce 4+ The molar ratio of Au to Zn is... 2+ Ce 4+ Au = 1:0.5 ~ 1:2.5 * 10 ‑7 ~7.5*10 ‑7 This method uses electrodeposition to prepare ZnO as a substrate. Its vertically aligned one-dimensional (1D) nanostructures exhibit quantum size-dependent effects, effectively shortening the carrier diffusion distance. CeO2 coats the ZnO, forming a stable, acid- and alkali-resistant substrate material. CeO2 traps electrons from Ce... 4+ Restored to Ce 3+ This forms oxygen voids and Ce 3+ / Ce 4+ Electron pairs produce high catalytic activity.

The invention belongs to the technical field of high polymer materials, and particularly relates to a novel nylon modified material, a high-strength excavator oil cylinder guide ring and a preparation process of the high-strength excavator oil cylinder guide ring. According to the material, high-temperature nylon is used as a matrix, two modified compounds of a bicyclic guanidine zinc metal organic framework and hyperbranched phosphorus-containing polyester are innovatively introduced, and alkali-free chopped glass fibers, boron nitride, an antioxidant and an ultraviolet light absorber are cooperated. The bicyclic guanidine zinc metal organic framework is prepared by regulating the pH value of aminoguanidine salt, furandicarboxylic acid and zinc nitrate according to a specific molar ratio in a mixed solvent of water and ethanol and then reacting; the hyperbranched phosphorus-containing polyester is synthesized by two-step reaction of acrylate, phosphaphenanthrene oxide and pentaerythritol in a specific molar ratio under the action of a catalyst. The preparation method of the guide ring comprises the key steps of melt blending granulation of all the components, injection molding, segmented heat treatment and the like. The material has the advantages of high strength, high wear resistance, low warping and excellent dimensional stability, and is especially suitable for high-load working conditions such as hydraulic oil cylinders of excavators.

The application relates to an activation method of a high-loading manganese dioxide electrode material, in particular to in-situ growth of a high-loading manganese dioxide electrode material with a loading of greater than or equal to 15 mg cm ‑2 on a flexible carbon cloth surface, taking the high-loading manganese dioxide electrode material as a working electrode, taking a metal Pt sheet as a counter electrode, adopting a two-electrode system, activating the high-loading manganese dioxide in a zinc nitrate solution through cyclic voltammetry scanning, and the activated high-loading manganese dioxide exhibits excellent electrochemical properties. The application adopts an electric activation method to improve the electrochemical activity of the high-loading manganese dioxide, has the advantages of simple process, convenient operation and the like, and the activated high-loading manganese dioxide electrode material can be used for electrochemical energy storage.

The invention relates to the technical field of filter bag production, in particular to a high-adsorbability polystyrene microporous filter bag and a preparation method thereof. The composite material is prepared from the following raw materials in parts by weight: 100-120 parts of polypropylene, 25-30 parts of an adsorbent, 2-4 parts of reinforced fibers, 1-2 parts of a titanate coupling agent, 0.6-0.8 part of zinc stearate and 100-120 parts of a composite solvent, the preparation method comprises the following steps: magnetically stirring and mixing modified graphene oxide and a zinc nitrate hexammine complex solution, adding a 2-methylimidazole solution into the mixture, stirring, carrying out solid-liquid separation, washing the obtained solid with a mixed solvent, and drying to obtain a preform; under the protection of nitrogen, mixing and stirring the obtained prefabricated material and an ascorbic acid solution, then carrying out solid-liquid separation, washing the obtained solid with ethanol and deionized water, and drying to obtain an adsorbent; the filter bag not only has better mechanical properties, but also has excellent acid resistance, and has the effects of highly adsorbing heavy metal ions in sewage and removing COD (Chemical Oxygen Demand).

The invention belongs to the technical field of coatings, and particularly relates to a fireproof coating material for a color-coated aluminum plate strip and a preparation method thereof, the fireproof coating material comprises the following raw materials by weight: 35-40 parts of an epoxy resin base material, 25-30 parts of a composite modified flame retardant, 5-10 parts of a modified reinforcing filler, 3-6 parts of a char forming accelerator, 1-2 parts of a dispersant, 0.5-1 part of an antifoaming agent, 15-20 parts of a solvent, and 2-4 parts of a wear-resistant auxiliary agent; wherein the composite modified flame retardant is prepared by firstly modifying melamine cyanurate, then reacting with a prepolymer synthesized by diethanol amine and adipic acid, and adding ammonium polyphosphate and expandable graphite; the modified reinforcing filler is prepared by treating silicon dioxide with a silane coupling agent and then reacting with chitosan and zinc nitrate. The coating material has excellent fire resistance, adhesive force, corrosion resistance and bending resistance through the synergistic effect of all the components, is suitable for surface protection of the color-coated aluminum plate strip, and can effectively improve the fire resistance rating and prolong the service life of the aluminum plate strip.

The present application relates to a kind of for CO2 hydrogenation methanol hydrophobic core-shell catalyst and its preparation method and application, belong to catalyst preparation technical field.Zirconium-based metal organic framework UiO-66 is core body, outer layer constructs hydrophobic mesoporous silica shell layer to form core-shell structure carrier.The carrier is pre-wetted with solvent before metal introduction, and copper, zinc nitrate precursor is introduced under the condition, and its wetting, penetration and migration process in channel are controlled, so that it can penetrate hydrophobic mesoporous shell layer and transport to core-shell interface and UiO-66 core surface.Subsequently, by adjusting metal deposition kinetics, copper zinc species is selectively deposited and forms active component enrichment at interface.Preferably, by controlling metal loading process, copper zinc active component is enriched and controllably distributed in hydrophobic core-shell structure, so as to improve the stability and catalytic performance of catalyst in CO2 hydrogenation methanol reaction.