444 results about "Zinc nitrate" patented technology

The invention relates to the technical field of biocatalysts, in particular to a FeCo-NC bimetallic monatomic nano-enzyme as well as a preparation method and application thereof. The preparation method of the nano enzyme comprises the following steps: preparing Co-ZIF-8 from zinc nitrate, cobalt nitrate and 2-methylimidazole; the Co-ZIF-8 and ferric chloride are used for preparing the FeCo-NC bimetallic monatomic nano-enzyme, the molar ratio of the zinc nitrate to the cobalt nitrate is (20-30): 1, and the molar ratio of the cobalt nitrate to the ferric chloride is (2-6): 1. The nano-enzyme prepared by the embodiment of the invention is of a monatomic structure, has double-enzyme activity, can simultaneously simulate catalase and NADH oxidase, and has the capability of removing active oxygen.

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 relates to a preparation method of a terephthalic acid and 2-methylimidazole organic framework catalyst, and relates to a preparation method of a high polymer material catalyst, the preparation method comprises the following steps: weighing C6H4 (COOH) 2 and 2-methylimidazole, dissolving C6H4 (COOH) 2 and C4H6N2 in N, N-dimethylformamide (DMF), weighing zinc nitrate hexahydrate (Zn (NO3) 2.6 H2O), dissolving in DMF, and preparing into a solution; the preparation method comprises the following steps: mixing a C6H4 (COOH) 2 solution and a C4H6N2 solution in proportion, and uniformly stirring; slowly adding the mixed ligand solution into a mixed solution of zinc nitrate hexahydrate (Zn (NO). 6HO) dissolved in DMF (Dimethyl Formamide), and transferring into a high-pressure reaction kettle for reaction; after cooling, centrifugally separating to obtain a white solid product, washing with methanol, and drying to obtain the Zn-MOF catalyst. The Zn-MOF catalyst provided by the invention can be widely applied to polyester synthesis, esterification reaction and other organic catalytic reactions, and especially has significant advantages in PBAT synthesis.

The invention discloses a woven suede fabric and a preparation process thereof, and relates to the technical field of fabrics. According to the preparation method, the base cloth is subjected to dipping treatment by using the dipping liquid, so that the woven suede fabric with excellent flame retardance is prepared. A modified metal organic framework material is added into an impregnation liquid, the metal organic framework material has excellent thermal stability, 2-methylimidazole and zinc nitrate are used as raw materials, hexachlorocyclotriphosphazene with a good flame-retardant effect is packaged into the metal organic framework material, and the flame-retardant performance of the material is improved. The flame-retardant effect of the metal organic framework material is further enhanced, so that the flame-retardant property of the woven suede fabric is improved. The metal organic framework material is treated by using phytic acid, then copper sulfate pentahydrate is added, more metal ions can be chelated through the chelating performance of phytic acid on the metal ions, the catalytic carbonization effect is achieved, and therefore the flame retardant property of the woven suede fabric is improved.

The invention relates to a manganese zinc ferrite composite magnetic catalyst and a preparation method thereof. The preparation method comprises the following steps: adding manganese nitrate, zinc nitrate and ferric nitrate into deionized water to form a metal ion solution; the preparation method comprises the following steps: adding ethylenediaminetetraacetic acid into a metal ion solution to form sol, performing heating dehydration treatment, grinding, and performing heat treatment to obtain manganese zinc ferrite nanoparticles; dissolving calcium nitrate, indium nitrate and thioacetamide in deionized water, then adding the manganese zinc ferrite nanoparticles to obtain a suspension of a reaction mixture, carrying out hydrothermal reaction, and carrying out subsequent extraction treatment to obtain the manganese zinc ferrite composite magnetic catalyst. The composite magnetic catalyst is prepared by utilizing a two-step hydrothermal method, the photocatalytic performance of the composite magnetic catalyst is remarkably improved, and the composite magnetic catalyst can be quickly and completely recycled through magnet adsorption, so that the photocatalytic performance of a single catalyst is improved, and quick recycling and cyclic utilization of the photocatalyst are realized; and the application cost of photocatalysis is reduced.

The invention relates to the technical field of semiconductor gas sensors for gas detection, in particular to an in-situ construction method and application of a gas sensor for volatile aroma substance detection, and the in-situ construction method comprises the following steps: mixing an aqueous solution of zinc nitrate hexahydrate and an aqueous solution of 2-methylimidazole according to different molar ratios to obtain a precursor solution; upwards fixing a planar electrode on the surface of a glass slide, and then transferring the planar electrode into the precursor solution; carrying out hydrothermal reaction on the precursor solution at 90 DEG C for 4 hours, after the hydrothermal reaction is finished, cooling to normal temperature, taking out the glass slide, washing the surface of an electrode by using deionized water, removing impurities, and then carrying out drying treatment; calcining the obtained dried electrode in an air atmosphere at 500 DEG C for 2 hours to construct an in-situ growth semiconductor sensor; according to the present invention, the rapid sensing response on nine volatile aroma substances is achieved, and the excellent gas sensitive characteristic is represented in the gas sensitive research on the volatile substance ocimene in the volatile aroma substances.

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 adsorption, and mainly relates to a preparation method of a nano alkenyl gas desorption agent and application of the nano alkenyl gas desorption agent in coal mine drainage and mining, and the preparation method comprises the following steps: mixing a graphene oxide aqueous solution with an ionic liquid, performing ultrasonic treatment, performing liquid nitrogen freezing and freeze drying to obtain three-dimensional graphene aerogel, immersing the three-dimensional graphene aerogel into a zinc nitrate ethanol solution, and performing vacuum infiltration to obtain the nano alkenyl gas desorption agent. The preparation method comprises the following steps: preparing graphene, then transferring the graphene into a 2-methylimidazole aqueous solution, carrying out hydrothermal reaction and plasma treatment to obtain graphene / MOF heterojunction, dispersing the graphene / MOF heterojunction in water to obtain a water phase, introducing the water phase and an oil phase into a microfluidic device to obtain microcapsules, dipping the microcapsules in a calcium chloride solution, carrying out simulated body fluid mineralization treatment, and drying to obtain desorption agent particles. According to the preparation method of the nano alkenyl gas desorption agent, the three-dimensional graphene aerogel is prepared through liquid nitrogen freezing and ionic liquid cross-linking, so that a multi-stage gradient pore channel structure is formed, the gas adsorption capacity is remarkably improved, lamellar cross-linking is enhanced through the ionic liquid, and an aerogel skeleton is stabilized.

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 an aggressive agent and method for displaying a microstructure of a high-temperature alloy GH6159. The aggressive agent is prepared from 0.5-1 g of zinc nitrate, 60-80 ml of hydrochloric acid, 7-10 ml of sulfuric acid, 80-100 ml of absolute ethyl alcohol and 15-20 ml of glycerinum. The display method of the microstructure of the high-temperature alloy GH6159 comprises the following steps: (1) preparing an aggressive agent; (2) preparing a sample; (3) sample erosion; (4) cleaning the sample; and (5) observing with a metallographic microscope. The aggressive agent provided by the invention is simple to prepare and convenient to use, the obtained crystal boundary is clear and complete, and the aggressive agent is very easy to popularize and use in laboratories.

The invention provides a method for preparing a nitrogen, phosphorus and sulfur tri-doped hollow carbon nanocage material derived from a covalent triazine polymer. The method comprises the following steps: by taking zinc nitrate hexahydrate and 2-methylimidazole as reactants and methanol as a solvent, stirring at room temperature to synthesize ZIF-8; the preparation method comprises the following steps: by taking phosphonitrilic chloride trimer and bisphenol S as monomers and ZIF-8 as a template agent, carrying out polymerization under the induction of an N, N-diisopropylethylamine initiator so as to generate ZIF-8 (at) PZS; and performing high-temperature pyrolysis to synthesize the nitrogen, phosphorus and sulfur triple-doped hollow carbon nanocage material. The invention also discusses the application of the nitrogen, phosphorus and sulfur tri-doped hollow carbon nanocage material in an air electrode material of a zinc-air battery. Meanwhile, the conductivity and the oxygen reduction reaction electro-catalytic performance of the obtained carbon material are remarkably improved through the nitrogen, phosphorus and sulfur doped synergistic effect, the half-wave potential of the carbon material reaches up to 0.85 V vs. RHE, and the limiting current density can reach 5.19 mA cm. A zinc-air battery assembled by using the material as an air electrode shows high peak power density of 194 mW cm.

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 polymer waste treatment, and discloses a composite curing agent for curing chlorine and sulfur in polymer waste microwave thermal conversion and a preparation method and application thereof, and the method comprises the following steps: dissolving calcium nitrate and aluminum nitrate in deionized water to form an active component I solution; dissolving at least one of zinc nitrate, copper nitrate, ferric nitrate, manganese nitrate and cerium nitrate as an active component II in the active component I solution, adding citric acid into the formed mixed solution to form gel, and drying to obtain an active matter; and mixing the active matter, silicon carbide and bentonite, ball-milling, extruding and granulating, and calcining to obtain the composite curing agent. The composite curing agent disclosed by the invention can efficiently recover pyrolytic carbon, pyrolytic oil and pyrolytic gas while effectively and synergistically curing chlorine and sulfur pollution elements in situ; the curing rate of the chlorine / sulfur element can reach 80%, the recovery rate of the composite curing agent can reach 98%, and meanwhile, the raw material cost is low, and the problems of secondary pollution and equipment corrosion are avoided.

The invention belongs to the technical field of new energy materials, and particularly relates to a preparation method of a biomass-based iron-nitrogen-doped carbon catalyst with a full pH range and application of the biomass-based iron-nitrogen-doped carbon catalyst in the field of zinc-air batteries. According to the preparation method, bacterial cellulose, zinc nitrate, ferric chloride and dimethylimidazole are taken as precursors, a clean, efficient and stable soft template method is selected, and Zn < 2 + > gasification and evaporation etching in a pyrolysis process are utilized, so that the derived carbon catalyst generates a large number of defects and a large number of micropores and mesopores, and overgrowth of iron nanoparticles is limited; and the oxygen reduction catalyst with high specific surface area and high catalytic activity and stability in a whole pH range is prepared through drying and high-temperature carbonization process optimization, so that an electrode active material with excellent electrochemical performance is provided.

The invention discloses a ZnF2 (at) FeF3. 0.33 H2O positive electrode material as well as a preparation method and application of the ZnF2 (at) FeF3. 0.33 H2O positive electrode material. The preparation method comprises the following steps: step 1, uniformly mixing ethanol and PEG-400 to obtain a mixed solvent; 2, ferric nitrate and zinc nitrate are dissolved in a mixed solvent, then an HF aqueous solution is dropwise added into the obtained solution under stirring, after stirring, the obtained mixed solution is transferred into a stainless steel high-pressure kettle to be heated in a closed mode and cooled to the room temperature, a product is washed, centrifuged and dried in vacuum, and powder is obtained; 3, the powder is placed in a tubular furnace and subjected to heat preservation treatment in the argon atmosphere, then the powder is naturally cooled to the room temperature, a product is taken out and ground, and the ZnF2-coated FeF3. 333 H2O material is obtained. By doping ZnF2, FeF3. 0.33 H2O has higher electronic conductivity and a more stable structure, and an all-solid-state lithium battery prepared from the FeF3. 0.33 H2O has higher specific capacity and better cycling stability.

The invention provides a Ti3C2 (at) PDA (at) MMT-Zn composite material, a preparation method thereof and a composite coating. The Ti3C2 (at) PDA (at) MMT-Zn composite material is prepared from the following components in parts by mass: 0.2 part of Ti3C2, 0.2 part of MMT, 0.2 part of a zinc nitrate corrosion inhibitor, 0.2 part of dopamine hydrochloride, 0.5 part of a trihydroxymethyl aminomethane Tris buffer solution, 0.1 part of a pH regulator and 120 parts of deionized water. Wherein the Ti3C2 two-dimensional nano material is obtained by taking Ti3AlC2 as a precursor and an HF aqueous solution as an etching system through mixing and stirring. According to the Ti3C2 (at) PDA (at) MMT-Zn composite material disclosed by the invention, not only can the dispersity and compatibility of the composite material in an epoxy coating be ensured, but also the physical shielding effect of a two-dimensional material and the active self-repairing performance of a corrosion inhibitor can be effectively combined to synergistically improve the corrosion resistance of the coating.

The invention relates to the technical field of low-zinc composite active agents, in particular to a low-zinc efficient composite active agent for blended rubber and a preparation method thereof.The preparation method comprises the following steps that zinc acetate, zinc nitrate, zinc sulfate and urea are mixed to prepare nano-zinc oxide, and the nano-zinc oxide is modified with polypropylene glycol to obtain modified nano-zinc oxide; mixing and stirring a dispersing agent, stearic acid, modified nano zinc oxide, multi-walled carbon nanotubes and magnesium oxide under the protection of inert gas to prepare a blend, and curing and molding the blend through a condensation granulation process to obtain the low-zinc high-efficiency composite activator for blended rubber. The prepared low-zinc efficient composite active agent for the blended rubber shortens the vulcanization time of the blended rubber, is excellent in dispersity and enhances the mechanical properties, including tensile strength and elongation at break, of the blended rubber, and in addition, the preparation method is simple and convenient to operate and low in cost and has a good industrial application prospect.

The invention belongs to the field of coal chemical industry purification, and particularly relates to an ultrahigh-precision conversion absorption type dechlorination purifying agent and a preparation method thereof. Wherein the dechlorination purifying agent is prepared from the following components in percentage by weight: 5%-30% of Fe2O3, 1%-10% of CuO, 10%-30% of ZrO2, 20%-40% of Al2O3, 10%-20% of ZnO and the balance of auxiliaries. The preparation method comprises the following steps: preparing ferric nitrate, copper nitrate, zirconium nitrate, aluminum nitrate and zinc nitrate into a solution, carrying out co-precipitation by using alkali liquor as a precipitator, washing, drying and calcining the obtained material to obtain a precursor, dipping the precursor powder with ammonium dihydrogen phosphate or phosphoric acid, drying and calcining, and carrying out compression molding. The dechlorination purifying agent can reduce the total amount of organic chlorine and inorganic chlorine in raw gas such as raw coke oven gas, coke oven gas, natural gas and gaseous hydrocarbon to 0.01 ppm or below, has the capacity of converting and absorbing organic chlorine, and meanwhile has extremely high dechlorination precision.

The invention discloses a colloidal emulsion explosive with high storage stability and a preparation method thereof. The raw materials for preparing the emulsion explosive comprise ammonium nitrate, calcium nitrate, water, a compound emulsifier, compound wax and a special foaming agent. Wherein the composite emulsifier is a modified span-80 composite emulsifier obtained by carrying out esterification reaction on an anionic carboxylate emulsifier and multiple hydroxyl sites of span-80, and the composite emulsifier has high molecular weight, so that the space volume of a lipophilic group is increased, and an interfacial film is tighter; the special foaming agent is composed of sodium nitrite, zinc nitrate, gelatin peptone, Tween 80, phosphoric acid, urea and water, the gelatin peptone is a green pure natural raw material, the surface tension of an emulsion matrix is effectively reduced, the contact area of the foaming agent and the emulsion matrix is increased, the foaming efficiency is catalyzed by zinc nitrate, and bubbles are good in stability and not prone to escaping due to Tween 80. The use of the compound emulsifier and the special foaming agent improves the blasting performance and storage stability of the emulsion explosive.

The present invention belongs to the field of functional materials. Provided is a method for preparing a zinc-doped cobalt selenide catalyst. The method for preparing a zinc-doped cobalt selenide catalyst comprises: adding a selenium powder to a potassium hydroxide solution, stirring same until the selenium powder is dissolved, then adding deionized water, cobalt nitrate, zinc nitrate and ethylenediaminetetraacetic acid disodium salt to the resulting solution, continuing stirring, putting the finally obtained solution into a polytetrafluoroethylene reaction kettle for a hydrothermal reaction, and after the reaction is finished, cooling the resulting reaction product to room temperature and then washing, drying and grinding same, so as to obtain a zinc-doped cobalt selenide catalyst. In the method for preparing a zinc-doped cobalt selenide catalyst provided by the present invention, during the preparation process, the raw materials are readily available, the reaction conditions are mild, and a zinc-doped cobalt selenide catalyst can be obtained at a relatively low temperature, all of which are beneficial for reducing the production cost. The zinc-doped cobalt selenide catalyst prepared in the present invention has a unique rod-like structure and good electro-catalytic performance, and the obtained electrocatalyst is non-toxic and harmless, and has wide application prospects.

The invention discloses a nanometer silicon-based negative electrode material as well as a preparation method and application thereof, and relates to the technical field of lithium ion battery negative electrode materials. The invention relates to a preparation method of a nano silicon-based negative electrode material, which comprises the following steps: uniformly mixing silicon nanoparticles, a surface modifier and a solvent to prepare a surface modification reaction suspension of nano silicon, carrying out stirring reaction, centrifugally separating out bottom precipitate, and drying to obtain surface-modified nano silicon; dispersing the surface-modified nano silicon into a methanol solution, adding zinc nitrate and 2-methylimidazole, dissolving the zinc nitrate and the 2-methylimidazole to obtain a uniform suspension, performing stirring reaction, performing centrifugal separation to obtain bottom precipitate, and washing and drying the precipitate to obtain composite material powder; and sintering the composite material powder in a reducing atmosphere to obtain the nano silicon-based negative electrode material. The problems of poor structure uniformity, insufficient pore structure optimization, high cost and complexity, weak interface bonding and the like are solved.

The invention relates to a controlled-release solid corrosion and scale inhibitor and a preparation method thereof, and belongs to the technical field of scale inhibition materials for water treatment. According to the preparation method of the controllably released solid corrosion and scale inhibitor, three metal salts (manganese nitrate, zinc nitrate and aluminum nitrate) are used as precursors, xanthan gum is used as a modifier, and a Mn-Zn-Al ternary modified hydrotalcite-like material is prepared through a hydrothermal reaction; further mixing, granulating and sieving the ternary modified hydrotalcite-like material and the scale and corrosion inhibition active component to prepare solid corrosion and scale inhibitors with different sizes. The solid corrosion and scale inhibitor provided by the invention can reduce the formation of scale and effectively delay the corrosion of metal, has a lasting action period, can realize the controlled release effect of the scale and corrosion inhibition active components, is beneficial to improving the utilization rate of water resources and reducing the use amount of water treatment aids, and has the advantages of environmental protection, environmental protection and the like. Meanwhile, the scale inhibitor has a good application prospect and development potential in development and application of the scale inhibitor for water treatment.

The invention belongs to the technical field of aviation fuel, and provides a method for producing sustainable aviation fuel by utilizing straws, which comprises the following steps: firstly, preparing synthesis gas from the straws; then carrying out a catalytic reaction on the synthesis gas and dimethyl ether through a primary molecular sieve catalyst, carrying out a catalytic reaction on the obtained catalytic product through a secondary metal catalyst, and separating to obtain ethanol; then preparing ethylene from the ethanol; and finally, preparing the aviation fuel from ethylene. The preparation method of the primary molecular sieve catalyst comprises the following steps: mixing a phosphoric acid solution with deionized water, adding a template agent according to a molar ratio of phosphoric acid to the template agent of 1: (0.5-0.55), and adding an aluminum source, a cerium source and silica sol while stirring to obtain gel; heating and crystallizing the gel; centrifugally washing the product to be neutral, drying and roasting; immersing the roasted product into a zinc nitrate solution, drying and calcining to obtain a zinc-loaded product; and performing dealumination treatment on the zinc-loaded product by using a citric acid solution, and roasting to obtain the zinc-loaded catalyst. According to the method, the ethanol yield in the aviation fuel production process can be remarkably 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 all-vanadium redox flow batteries, and particularly discloses a bismuth alkene nanosheet modified defect-rich graphite felt electrode for an all-vanadium redox flow battery and a preparation method of the bismuth alkene nanosheet modified defect-rich graphite felt electrode for the all-vanadium redox flow battery. The preparation method comprises the following steps: dissolving zinc nitrate (Zn (NO3) 2) in a solvent to prepare a saturated solution, soaking TGF in the saturated solution, drying, and calcining in a nitrogen atmosphere to prepare porous graphite felt (CGF) of which the surface is rich in carbon defects; the preparation method comprises the following steps: dissolving bismuth chloride (BiCl3) in a prefabricated electrolyte (containing V2 (SO4) 3 and H2SO4 solution with a certain concentration), and depositing on the surface of the CGF by adopting a constant current density electrodeposition method to form a few layers of bismuthene nanosheets, so as to prepare the BieneNF-CGF electrode. The prepared electrode shows excellent electrochemical activity and interface stability, the electrode reaction kinetics and the overall performance of the battery can be remarkably improved, high-rate, high-energy-efficiency and long-cycle-life all-vanadium redox flow battery application is achieved, and good industrial application prospects are achieved.

The invention belongs to the technical field of catalyst preparation, and provides a preparation method of a long-acting operation catalyst for methanol synthesis, and the preparation method comprises the following steps: adding graphene into deionized water, stirring, adjusting the pH value, adding a LaCl3. 6H2O solution, heating for reaction, adjusting the pH value, adding an anionic surfactant, continuously reacting, centrifugally washing, and drying to obtain the long-acting operation catalyst for methanol synthesis. Performing vacuum drying and grinding to obtain modified graphene; then adding a copper nitrate solution, a zinc nitrate solution and an aluminum nitrate solution into deionized water, heating, stirring and mixing, adding a precipitator, adjusting the pH value, carrying out a co-precipitation reaction, filtering, washing and drying to obtain a precipitation material; and finally, uniformly mixing the precipitation material with the modified graphene, roasting the mixture in a muffle furnace in an air atmosphere, and tabletting and grinding to obtain the catalyst. The obtained catalyst has high activity, high selectivity and good heat resistance, the preparation method is simple, and the cost is low.

The invention provides a high-performance organosilicon sealant for electronic packaging, and relates to the technical field of organosilicon sealants. The organic silicon sealant is prepared from the following raw materials: methyl vinyl silicone oil, vinyl dimethyl silane, a platinum catalyst, fumed silica, a B4Cw (at) ZrO2 compound, ethynyl cyclohexanol, a silane coupling agent, a titanate coupling agent, a cerium-zinc composite antioxidant and an auxiliary antioxidant. The B4Cw (at) ZrO2 compound is prepared from boron carbide whiskers and nano zirconium oxide sol; the cerium-zinc composite antioxidant is prepared from cerium nitrate, zinc nitrate and ammonia water. The preparation method of the high-performance organic silicon sealant for electronic packaging comprises the following steps: pretreating boron carbide whiskers, synthesizing a B4Cw-coated ZrO2 compound, preparing a cerium-zinc composite antioxidant, preparing a basic rubber material, and preparing the organic silicon sealant. The prepared organic silicon sealant is high in mechanical strength, excellent in elastic property and high in durability.

The invention relates to the technical field of catalysts, in particular to preparation and application of a B-site La-doped magnetic nano ZnFe2O4 catalyst.The preparation method of the catalyst comprises the following steps that zinc nitrate, ferric nitrate, lanthanum nitrate and cerous nitrate are selected as base materials, the molar ratio of the zinc nitrate to the ferric nitrate to the lanthanum nitrate to the cerous nitrate is 1: 1.5: 0.5: 0.3, and the molar ratio of the zinc nitrate to the ferric nitrate to the lanthanum nitrate to the cerous nitrate is 1: 1.5: 0.5: 0.3; zinc nitrate, ferric nitrate, lanthanum nitrate and cerous nitrate are dissolved in a eutectic solvent in proportion, then modified citric acid is added as a complexing agent for mixing, and carbon nanotube powder and zinc acetate are added in the process. According to the scheme provided by the invention, the B site of the catalyst is directionally occupied by La, Zn < 2 + > activity loss caused by A site doping is avoided, the stability and catalytic effect of the catalyst are improved by adding Ce, the carbon nanotubes and zinc acetate, and the removal rate of the catalyst to high-concentration or refractory organic matters is improved.