55 results about "Nickel acetate" patented technology

The invention discloses a method for preparing high-purity nickel acetate from crude nickel carbonate in the technical field of nickel compound purification, which comprises the following steps: mixing the crude nickel carbonate with deionized water to obtain a suspension, and adding glacial acetic acid to react to obtain a nickel acetate solution; then a specially-made hierarchical-pore titanium silicalite molecular sieve loaded bimetallic nanocluster material is added for purification treatment, the material is obtained through precise preparation, the method comprises the steps of carrier modification, bimetallic loading, hydrophobic modification, activation balance and the like, and the material has excellent impurity adsorption capacity and chemical stability; carrying out concentration crystallization and solid-liquid separation on the purified solution to obtain wet nickel acetate crystals; the mother liquor is subjected to adsorption treatment again, crystals in the mother liquor are recycled, and finally all the crystals are combined and dried to obtain a high-purity nickel acetate product. The process is simple and efficient, the purity of the prepared nickel acetate exceeds 98.5%, the content of each impurity is superior to the industrial standard, and the mother liquor can be recycled, is environment-friendly and is suitable for industrial production.

The invention discloses a low-smoke halogen-free aging-resistant insulated cable and a preparation method thereof, belongs to the technical field of cable preparation, and is used for solving the technical problem that the smoke suppression performance and the aging resistance of a sheath layer of an insulated cable in the prior art need to be further improved. The preparation method specifically comprises the following steps: mixing polypropylene, SBS-g-MAH, modified nanoparticles, a flame-retardant modified monomer, an initiator and an auxiliary additive, adding the mixture into a double-screw extruder, melting the mixture, extruding the melt mixture and coating the melt outside a wrapping layer to form a sheath layer, thereby obtaining the insulated cable. The modified POSS and the phenolic resin are mixed to prepare the modified microspheres, and the nickel acetate solution is further introduced for complexing deposition to obtain the modified nanoparticles, so that not only are the smoke suppression performance and the flame retardant performance of the insulated cable sheath layer improved, but also the mechanical performance and the thermal aging resistance of the cable sheath layer are improved.

The invention discloses an aluminum alloy hard oxidation process, and relates to the technical field of aluminum alloy part surface treatment, the aluminum alloy hard oxidation process comprises the following steps: S1, pretreatment: oil removal, alkali corrosion treatment and acid pickling neutralization; s2, hard oxidation is conducted, specifically, the pretreated workpiece is put into an oxidation tank with electrolyte and a stirring system to be subjected to stirring and oxidation treatment; and S3, post-treatment: cleaning with hot water, sealing with nickel acetate and drying in a drying oven. The process mainly comprises the following steps: carrying out pretreatment of oil removal by an organic solvent, alkali etching and acid pickling, combining sulfuric acid-citric acid-monopotassium phosphate composite electrolyte, pulsed power supply and gradient boosting oxidation, carrying out ultrasonic stirring and precise temperature control hard oxidation, and finally carrying out nickel acetate sealing aftertreatment. The four industrial problems of poor batch consistency of oxidation films of aluminum alloy workpieces, non-uniformity of complex workpieces, high energy consumption and poor compatibility to high alloy materials are thoroughly solved, and the oxidation film which is high in hardness, uniformity and corrosion resistance and saves energy is obtained.

The application discloses a kind of iron oxide / nickel ferrite composite nanorods and synthesis method thereof, belong to nanometer material technical field.The obtained composite nanorod is polycrystalline structure, and is composed of rhombohedral Fe2O3 and cubic NiFe2O4 crystal phase.The diameter of the composite nanorod is 10-100nm, and the length is greater than 500nm.The synthesis method is that iron acetate and nickel acetate are dissolved in deionized water, heated to temperature 80-100 DEG C, and kept for 1-5h, and iron oxide / nickel ferrite precursor is obtained after cooling and drying;iron oxide / nickel ferrite precursor is mixed with calcium chloride and sodium chloride, then the mixture is loaded into corundum crucible, the crucible is placed in reaction furnace, at temperature 800-1000 DEG C, and kept for 5-10h.The synthesis process of the application is simple, does not need complex equipment, and is easy to control.Iron oxide / nickel ferrite composite nanorod has a large number of catalytic active sites, and is expected to have good interface performance, catalytic activity, electrical and magnetic properties, and has good application prospect in catalysts, electrical devices and magnetic devices.

The invention discloses an iridium-ruthenium diatom / sponge nickel composite material, a preparation method thereof and application of the iridium-ruthenium diatom / sponge nickel composite material in alkaline electro-catalytic hydrogen evolution. The preparation method comprises the following steps: weighing nickel acetate, dissolving hydrazine hydrate, chloroiridic acid and a ruthenium trichloride aqueous solution in deionized water to prepare a mixed solution, placing the mixed solution in a high-pressure reaction kettle, and carrying out a hydrothermal reaction to obtain the iridium-ruthenium diatom / sponge nickel composite material electrocatalyst. Compared with an original sponge nickel electrocatalyst, the iridium ruthenium diatom / sponge nickel composite material prepared by the invention has better alkaline electrocatalytic hydrogen evolution performance; the method has the advantages that the acidity of chloroiridic acid enables part of Ni atoms to be dissolved out to generate Ni vacancies, so that iridium-ruthenium diatomic nucleation sites are provided. The composite material can synergistically catalyze alkaline hydrogen evolution, the mechanism of the composite material provides alkaline H2O cracking sites for nickel sites, active hydrogen species are obtained, rapid desorption of hydrogen protons is further achieved through iridium-ruthenium diatoms, and therefore more excellent alkaline electrocatalytic hydrogen evolution performance is obtained.

This invention relates to a g-C3N4@NiS composite photoelectrocatalyst and its preparation and application. The catalyst has a flower-like hierarchical porous structure, composed of g-C3N4 nanospheres and NiS nanoparticles supported thereon. The g-C3N4 nanospheres are assembled from stacked nanosheet layers. The NiS nanoparticles and g-C3N4 nanospheres form an in-situ covalently bonded heterojunction through Ni-S and Ni-N bonds, constructing a p-n heterostructure. The preparation method involves mixing melamine, glucose, CTAC, nickel acetate, and thiourea, and simultaneously achieving the condensation polymerization of g-C3N4 and the growth of NiS using a low-temperature one-pot hydrothermal method. Under alkaline conditions, the HER overpotential of this catalyst is only -2 mV at 10 mA cm⁻¹. ‑2 The overpotential of OER is 270 mV at 10 mA cm⁻¹. ‑2 In the dual-electrode total water splitting system, only 2.4 V is required to achieve 20 mA cm⁻¹. ‑2 It achieves a high current density and operates stably for over 24 hours, exhibiting excellent catalytic activity and stability in seawater. This invention boasts advantages such as a simple synthesis process, strong interfacial coupling, superior catalytic performance, and resistance to seawater corrosion.

The invention discloses a preparation method of modified in-situ ZTA composite ceramic with good wettability with high-chromium cast iron, and relates to the technical field of ceramic-based composite materials. The preparation method comprises the following steps: fully stirring and mixing a ZTA precursor solution prepared from aluminum ammonium sulfate, zirconium oxychloride, yttrium nitrate, polyethylene glycol and ammonium bicarbonate through chemical coprecipitation with a Ni precursor solution prepared from nickel acetate hydrate and potassium hydroxide through a chemical precipitation method, carrying out liquid-liquid doping, and carrying out calcination and reduction processes to obtain powder; a modified authigenic ZTA multiphase ceramic block with good wettability with high-chromium cast iron can be obtained after vacuum hot pressed sintering, and the ceramic block can be used in a ceramic particle reinforced iron-based composite material after being broken and sieved; the ZTA composite ceramic is in-situ synthesis, nickel is dispersed and uniformly distributed in ZTA, an interface is improved through a wetting and diffusion mechanism, and the wettability of the ZTA and high-chromium cast iron can be effectively improved under the condition that the performance of the ZTA is not affected.

This invention discloses a preparation process for high-carbon ferrochrome based on plasma spheroidization technology, belonging to the field of powder metallurgy. The process involves crushing and ball milling high-carbon ferrochrome blocks to obtain pre-formed powder, adding tannic acid, urea, nickel acetate tetrahydrate, and citric acid for coating, followed by spray drying. After pre-reduction carbonization in an argon-hydrogen atmosphere, the powder is then spheroidized using a radio frequency inductively coupled plasma torch. In-situ nanostructure growth is achieved in a mixed atmosphere of argon, hydrogen, and acetylene. Nickel acetate is reduced to catalytically active elemental nickel nanoparticles under the action of hydrogen and carbon monoxide. The powder is then cooled, graded, and inertly encapsulated to obtain a high-sphericity, low-oxygen-content, high-carbon ferrochrome-based core-shell structured spherical powder. The process flow of this invention is continuous and controllable, effectively improving powder flowability, bulk density, hardness, and corrosion resistance, and is applicable to additive manufacturing, thermal spraying, and powder metallurgy forming.

The invention discloses a low-resistance LaNiO3 ceramic target material as well as a preparation method and application thereof, and belongs to the technical field of magnetron sputtering target material preparation. Lanthanum nitrate and nickel acetate are used as raw materials, and the low-resistance LaNiO3 ceramic target material is prepared through the steps of dissolution, drying, heat treatment, compression molding, sintering and the like. According to the low-resistance LaNiO3 ceramic target material and the preparation method thereof, introduction of impurities is avoided in the preparation process, high purity and excellent performance of the target material are guaranteed, and the low-resistance LaNiO3 ceramic target material has the advantages of being economical, capable of saving energy and suitable for industrial batch production. Meanwhile, due to the low-power build-up characteristic of the target material in the magnetron sputtering process, the energy consumption is further reduced, the service life of the target material is prolonged, the quality and performance of the thin film are improved, more reliable and efficient target material selection is provided for application of the LaNiO3 thin film in the semiconductor fields of electronic devices, sensors and the like, and a remarkable gain effect is achieved.

The invention provides nickel sulfide as well as a preparation method, an electrochemical performance test method and application thereof, and relates to the technical field of electrochemical materials. The method comprises the following steps: adding nickel acetate hexahydrate and thioacetamide into a container, adding ultrapure water into the container, and uniformly stirring to obtain a mixed solution; transferring the mixed solution into a reaction kettle, sealing the reaction kettle, putting the reaction kettle into a drying oven, heating the reaction kettle to a first temperature for a first duration, and carrying out a hydrothermal reaction to generate nickel sulfide; and after the hydrothermal reaction is finished, after the reaction kettle is cooled to room temperature, opening the reaction kettle, and washing nickel sulfide in the reaction kettle to prepare nickel sulfide. According to the method, the concentration in nickel sulfide is accurately controlled by regulating and controlling the hydrothermal reaction time, and the electro-catalytic hydrogen evolution performance is improved, so that the performance of the nickel sulfide electrochemical material is optimized.

The invention relates to a synthesis method of a polyacrylamide modified Ni-Pt bimetallic nano-enzyme and application of the polyacrylamide modified Ni-Pt bimetallic nano-enzyme in detection of penicillin residues. Nickel acetate, platinum acetylacetonate (II), sodium acetate and polyacrylamide (PAM) are used as basic raw materials, a solvothermal synthesis method is adopted, the Ni-Pt bimetallic nano-enzyme which is simple in process, excellent in catalytic performance and stable in material property is synthesized, and the Ni-Pt bimetallic nano-enzyme is successfully applied to construction of a penicillin direct detection method system. The system has the characteristics of high sensitivity, good selectivity, low cost, convenience and rapidness, and penicillin in a water sample can be efficiently and directly detected. According to the invention, not only is the prospect of the high-activity bimetallic nano-enzyme shown, but also an expected way is provided for environmental antibiotic monitoring.

A method for preparing a SnO2 hollow sphere / NiO cross-linked nanosheet composite-based gas sensor with high sensitivity for detecting triethylamine gas belongs to the field of thermoelectric materials technology. This invention aims to solve the problem of poor selectivity of SnO2 for triethylamine in existing methods. The method includes: 1. Injecting anhydrous tin tetrachloride liquid into anhydrous ethanol, followed by the sequential addition of distilled water and concentrated hydrochloric acid; 2. Preparing SnO2 hollow nanosphere powder; 3. Preparing a dispersion of SnO2 hollow nanospheres; 4. Preparing a nickel acetate solution; 5. Adding ammonia water to the nickel acetate solution; 6. Preparing SnO2 hollow nanosphere powder with Ni(OH)2 cross-linked nanosheets grown on its surface; 7. Preparing SnO2 hollow nanosphere powder with NiO cross-linked nanosheets grown on its surface; 8. Preparing the gas sensor. This invention is used for preparing a SnO2 hollow sphere / NiO cross-linked nanosheet composite-based gas sensor with high sensitivity for detecting triethylamine gas.

The application discloses a method for synthesizing N-(hetero) aryl sulfonamide compounds. The method uses bipyridine as a ligand, nickel acetate or nickel chloride as a catalyst, low-cost low-activity (hetero) aryl chloride and different types of sulfonamides as substrates, 1,8-diazabicycloundec-7-ene, tetramethyl guanidine, 7-methyl-1,5,7-triazabicyclo[4.4.0]dec-5-ene and the like as organic bases, and tetra-n-butylammonium iodide as an additive. The C-N coupling reaction of (hetero) aryl chloride and sulfonamide is realized by light-induced nickel catalysis in an argon atmosphere, so as to realize the synthesis of various (hetero) aryl sulfonamide compounds. The reaction system is simple, the operation is simple, the reaction condition is mild, the post-treatment is simple, the yield is good, the substrate range is wide, the use of traditional expensive metal catalysts and inorganic bases is avoided, the problems of complex catalytic system reaction and poor functional group compatibility are solved, and the method is a simple and efficient method for synthesizing (hetero) aryl sulfonamide compounds. The method has good application prospect.

The application discloses a La2O3-ZnO-NiO / ZrO2 oxygen carrier and a preparation method and application thereof, and belongs to the technical field of ammonia decomposition. The technical scheme comprises the following steps: 1) synthesis of a ZrO2 carrier: adding NH3H2O into a zirconyl nitrate solution to induce precipitation; 2) preparation of La2O3 / ZrO2: adding lanthanum nitrate hexahydrate and urea to obtain a precipitate, drying and finally calcining; 3) preparation of La2O3-ZnO / ZrO2: adding zinc nitrate hexahydrate and urea, standing to obtain a precipitate, drying and calcining; and 4) preparation of La2O3-ZnO-NiO / ZrO2: adding NH3H2O, then adding nickel acetate and thiourea, reacting, drying and twice calcining to obtain a target product. The application adopts lattice oxygen in the oxygen carrier to catalyze and oxidize ammonia gas decomposition, the oxygen carrier can be used repeatedly, and is suitable for future industrial application.

The invention discloses an anodic oxidation treatment method for medical equipment, which is characterized by comprising the following steps which are carried out in sequence: a hard anodic oxidation step: carrying out hard anodic oxidation at the temperature of 0-5 DEG C so as to form an anodic oxidation film with the thickness of 50-80 microns on the surface of a workpiece; in the first sealing step, a nickel acetate sealing agent with the concentration of 10%-15% is adopted for sealing the workpiece treated in the hard anodic oxidation step at the temperature of 90-95 DEG C, and the sealing time is 2400-3000 seconds. Compared with the prior art, the technical bottleneck of the requirement for special corrosion resistance of the medical equipment anode technology is broken through, the hard anode technology is used, and the corrosion resistance of the workpiece is greatly improved. Nickel acetate, an organic corrosion inhibitor and a water-soluble polymer sealing process are used after anodizing, the condition of corrosion resistance test requirements of medical equipment customers (the surface of the product is not subjected to bubbling test after being soaked in 5% hydrochloric acid for 20 H) is met, and the sealed product has no influence on the appearance and environmental protection and meets the Rohs requirement.

The invention discloses an Er2O3 / Ni3ZnC0.7 catalyst, preparation of the Er2O3 / Ni3ZnC0.7 catalyst and application of the Er2O3 / Ni3ZnC0.7 catalyst to improvement of hydrogen storage performance of magnesium hydride. The preparation method comprises the following steps: (1) dissolving nickel acetate, zinc acetate and erbium nitrate in DMF (Dimethyl Formamide), and magnetically stirring to form a solution A; (2) dissolving terephthalic acid and triethylamine in DMF (Dimethyl Formamide), and magnetically stirring to form a solution B; (3) pouring the solution B obtained in the step (2) into the solution A, and continuing magnetic stirring to obtain metal organic gel C; (4) carrying out vacuum filtration on the gel C obtained in the step (3), and washing with DMF (Dimethyl Formamide); and (5) carrying out high-temperature calcination on the gel obtained in the step (4) in an argon atmosphere, and grinding to obtain the Er2O3 / Ni3ZnC0.7 catalyst. The method has the characteristics of simplicity and convenience in operation, low cost, controllable catalyst morphology and high catalytic efficiency.

The invention discloses a preparation method and application of a p-n type NiO / Bi5O7I heterojunction photocatalyst, and belongs to the technical field of photocatalysis. The invention aims to solve the problems of limited visible light utilization depth and photon-generated carrier separation efficiency and lower specific surface area restriction performance of the existing Bi5O7I and overcome the defects of low light utilization efficiency and insufficient photocatalytic activity under visible light caused by wide band gap and low Ni < 3 + > concentration of the existing NiO photocatalyst. The preparation method comprises the following steps: 1, dissolving bismuth nitrate and nickel acetate in ethanol; 2, dissolving potassium iodide in water; 3, mixing reaction; 4, carrying out hydrothermal reaction; and 5, high-temperature calcination. According to the application, the strain is used for degrading perfluorooctanoic acid in a water environment The preparation method is used for preparation and application of the p-n type NiO / Bi5O7I heterojunction photocatalyst.

This invention provides a method for preparing Ni3C / Bi5O7I composite material and its application, relating to the field of photocatalysis technology. The preparation method includes: Step 1: Adding KI to a suspension containing Bi(NO3)3·5H2O and NaOH, stirring, and then carrying out a hydrothermal reaction. The resulting product is cooled to room temperature, centrifuged, washed, and dried to obtain Bi5O7I; Step 2: Adding nickel acetate to an oleylamine aqueous solution under a nitrogen atmosphere, carrying out a hydrothermal reaction, cooling to room temperature, and the resulting precipitate is centrifuged, washed, and dried to obtain Ni3C; Step 3: Adding Bi(NO3)3·5H2O solution dropwise to a suspension containing Bi5O7I and Ni3C under vigorous stirring, and then carrying out a hydrothermal reaction. The resulting precipitate is centrifuged, washed, and vacuum dried to obtain Ni3C / Bi5O7I. This invention improves the photocatalytic activity of Bi5O7I by introducing Ni3C into it, and gives the resulting photocatalytic material the ability to efficiently and stably degrade phenol in water, which has potential application value in the field of phenol-containing wastewater purification.

The invention discloses a knittable magnetic fiber material with an angle sensitive characteristic as well as a preparation method and application of the knittable magnetic fiber material. Cobalt acetate and nickel acetate are used as raw materials, under the alkaline condition, the magnetic fiber material of a CoNi single face-centered cubic crystal structure is prepared through solvothermal reaction under directional induction of a magnetic field, and the magnetic fiber material is in a long fiber shape with the smooth surface and has high orientation, angle sensitivity and weaving performance. According to the invention, the height orientation and the high length-diameter ratio of the magnetic fiber are realized through the oriented induction growth of the magnetic field, the magnetic anisotropy is obviously improved, and the material is endowed with angle-sensitive electromagnetic response. The shape of the magnetic fiber material is suitable for a weaving process, a fabric with functionality and certain flexibility can be prepared by combining conductive warp and weft materials, a woven body formed by weaving shows angle-dependent electromagnetic shielding and microwave thermal response performance, and the magnetic fiber material is suitable for the field of controllable electromagnetic protection and intelligent thermal management. And a new technical approach is provided for the development of flexible magnetic functional materials.

The invention discloses a preparation method of a nickel oxide supported platinum hydrogen evolution catalyst, and belongs to the technical field of catalytic materials. The preparation method comprises the following main steps: weighing 0.2 g of nickel acetate tetrahydrate and 0.2 g of graphite, uniformly grinding, then transferring into a muffle furnace, calcining for 1-3 hours in an air atmosphere at 450-750 DEG C to obtain a precursor A, weighing 4-18 mg of the precursor A, putting into a certain amount of H2PtCl6 solution with the concentration of 0.2-1.5 mmol / L, carrying out ultrasonic treatment for 30-60 minutes, then heating for 5-10 hours in a reaction kettle at 160-200 DEG C to complete a hydrothermal reaction, cooling to room temperature, carrying out suction filtration, and drying, so as to obtain the nickel acetate / graphite composite material. The prepared catalyst is obtained. The prepared catalyst has the catalytic effect equivalent to that of commercial Pt / C, the usage amount of platinum is remarkably reduced compared with that of commercial Pt / C, and the catalyst has commercial application prospects.

The application discloses a kind of magnetic foam structure composite material and its preparation method and application, belong to heat-conducting-wave-absorbing multifunctional material preparation technical field.The in-situ bubble assisted annealing process disclosed in the application is to dissolve iron nitrate, nickel acetate and polyvinylpyrrolidone in deionized water to obtain a mixed solution, then dry the solution to a viscous state, then place the viscous liquid in a tube furnace, pass inert gas and perform high-temperature annealing treatment to obtain the product.The application is simple to operate, has strong repeatability, low production cost, short cycle, is green and environmentally friendly, and can be prepared on a large scale.It can also prepare a series of magnetic foam structure composites by changing the feeding ratio and annealing temperature.The obtained magnetic foam has adjustable composition, texture, high thermal conductivity and wideband microwave absorption characteristics, and has good industrial application potential in heat management, microwave absorption and other fields.

The application discloses a high-efficiency stable Lewis acid-containing heterogeneous catalyst and a preparation method and application thereof, and belongs to the technical field of cycloaddition reaction catalysts.The heterogeneous catalyst has strong nucleophilic groups and strong electrophilic groups.The Lewis acid-containing raw material is selected from one of zinc acetate, cobalt acetate, copper acetate, ferrous acetate, magnesium acetate, nickel acetate, calcium acetate, manganese acetate, lead acetate and tin acetate.The prepared Lewis acid-containing heterogeneous catalyst is applied to catalyzing the cycloaddition reaction of an epoxide and CO2, and the cycloaddition reaction of ethylene oxide (EO) / propylene oxide (PO) and CO2 is preferentially adopted.The problems of difficult separation of a homogeneous catalyst and insufficient activity of a heterogeneous catalyst are preferably solved.

The application relates to the preparation of nanomaterials and the field of energy catalysis, and provides a phosphide nickel nanoflower catalyst loaded with superfine CeO2 nanoparticles, a preparation method and application. The nanoflower catalyst is composed of Ni2P nanosheets with a thickness of about 3.6 nm, and the nanoflower is uniformly loaded with superfine CeO2 nanoparticles with a particle size of 5.5 nm. A non-ionic surfactant P123 is dissolved in acetone, and is poured into a solvent in a stirring state. Cerium nitrate and nickel acetate are added. Hexamethylenetetramine is added, the mixed solution is transferred to a reaction kettle after being fully stirred, is taken out after being reacted in a reaction oven, is centrifuged, washed and freeze-dried to obtain a powder sample. Sodium hypophosphite is put into a quartz tube furnace for phosphorization treatment to obtain the catalyst X-CeO2 / Ni2P. The preparation method is simple, raw materials are cheap and easy to obtain, and the catalyst can be prepared in a large amount. The catalyst is widely applied to electrocatalytic water decomposition, oxygen reduction reaction (ORR), carbon dioxide reduction reaction (CO2RR), organic catalytic reaction and zinc air battery catalytic reaction.

The present application relates to a kind of thick nickel plating method of tungsten alloy surface directly.The steps of the present application are obtained by the following: first, the surface of tungsten alloy is pretreated to its to be plated surface exposes fresh metal and the roughness Ra of welding surface is less than or equal to 0.2 μm;Then with nickel acetate electrolyte as main electroplating solution, and SDS is added to it, the concentration of SDS is 0.04-0.1 g / L, after being dissolved sufficiently, start electroplating, control current density 0.3-1.1 A / dm 2 When electroplating, pH 3.5-5.5.The initial concentration of sodium chloride in the used nickel acetate electroplating solution is 3-14 g / L, the initial concentration of Ni 2+ Ion is 5-10 g / L, and the initial pH is 3.5-5.5.The number of drugs used in the present application is small, highly dangerous reagents such as hydrofluoric acid and sulfuric acid do not need to be used, expensive electroplating equipment such as pulse power is also not needed, the requirement for instrument is low, safety is good, production efficiency is high, and quite thick and dense nickel plating layer can also be stably obtained, which provides a low-cost, industrialized production method for the surface of tungsten alloy used for diffusion bonding to electroplate thick nickel layer.

The invention discloses a corrosion-resistant aluminum alloy and a preparation method thereof, relates to the technical field of metal surface treatment, and aims to solve the problems of serious pollution, high cost, non-lasting protection and the like of an existing corrosion-resistant means for an aluminum alloy shell of a fuel accessory. The preparation method comprises the following four steps: anodizing an aluminum alloy to lay a substrate for subsequent protection; then soaking in 96-100 DEG C acidic hot water for at least 30 minutes, and soaking in 90-100 DEG C nickel acetate solution for 10-15 minutes for double sealing to strengthen physical barrier; then the aluminum alloy is subjected to hydrophobic treatment, and adhesion of a corrosive medium is reduced; and finally polymerizing and hardening to ensure the stability of the protective layer. According to the corrosion-resistant aluminum alloy prepared through the method, the corrosion resistance is greatly improved, the corrosion-resistant aluminum alloy can be free of corrosion for 1800 h through a neutral salt spray test, the technology is environmentally friendly, the cost is controllable, operation is clear, the service life of a fuel accessory aluminum alloy shell can be prolonged, the safety and reliability of a fuel system can be improved, and the corrosion-resistant aluminum alloy is suitable for large-scale industrial application.

The invention belongs to the technical field of catalytic hydrogenation, and particularly relates to a petal-shaped nickel oxide-silicon dioxide hydrogenation catalyst which is prepared by the following steps: adding nickel acetate and urea into SiO2 microsphere dispersion liquid, carrying out heating reaction, filtering to obtain solid, washing, drying, roasting, carrying out hydrogen reduction, and passivating to obtain the hydrogenation catalyst. The surface of the SiO2 microsphere is coated with a petal-shaped NiO coating layer to form a hydrogenation catalyst, so that the yield of the aldehyde-terminated polyene ether converted into ether-terminated polyene ether through catalytic hydrogenation can be greatly improved, and the highest yield can reach 98%.

The invention discloses a preparation method of biomass-derived magnetic porous carbon nanoparticles, which comprises the following steps: by taking sodium alginate, polyvinyl alcohol, nickel acetate and the like as raw materials, preparing the magnetic porous carbon nanoparticles by adopting a wet solution spraying technology in combination with drying, low-temperature pre-oxidation treatment and a high-temperature carbonization technology. The magnetic porous carbon nanoparticles prepared by the method are uniform in size, large in specific surface area, high in metal loading capacity and strong in magnetism, and have great application prospects in the field of electromagnetic wave absorption. In addition, the wet solution spraying technology is simple to operate, low in cost, high in efficiency and easy for large-scale production.

The invention discloses a non-magnetic chemical nickel plating solution and a deposition process, and relates to the technical field of metal surface plating treatment. A non-magnetic chemical nickel plating solution comprises water-soluble nickel salt, a reducing agent, a composite complexing agent, a stabilizing agent, a buffering agent, a brightening agent and the balance water, the water-soluble nickel salt is selected from at least one of nickel sulfate, nickel acetate and nickel aminosulfonate, and the reducing agent comprises sodium hypophosphite. The composite complexing agent comprises at least one of lactic acid, citric acid, glycine and aspartic acid. According to the technical scheme, iron, cobalt and other magnetic metal impurity ions are not directly introduced into the plating solution, nickel ions and phosphorus ions in the plating solution can be stably deposited, and the hardness and thickness uniformity of a plating layer can be improved while non-magnetic chemical nickel plating is achieved.

The application provides a cellulose catalytic fermentation preparation method of industrial ethanol and a catalyst thereof, and belongs to the technical field of preparing industrial ethanol fuel from cellulose. The preparation method comprises raw material choline chloride-lactic acid eutectic solvent heat treatment, catalytic hydrolysis fermentation and product separation. The composite catalyst is prepared by compounding Zn-MOF-CNTs-OH composite precursor, lignin-cellulose-PMMA composite precursor, ammonium molybdate and melamine, sintering, NaOH etching, sequentially sulfonating by concentrated sulfuric acid and chlorosulfonic acid to introduce double acid sites, and finally mixing with ammonium iron citrate, nickel acetate, copper acetate and PVP-VA copolymer, and adding sodium borohydride aqueous solution to react. The crystalline structure of cellulose is broken by eutectic solvent pretreatment, the magnetic composite catalyst with double acid sites and metal alloy is used to realize efficient hydrolysis, the in-situ fermentation and catalyst regeneration process are combined, and the conversion efficiency and economy are significantly improved.

The invention belongs to the technical field of voltage-sensitive ceramic material preparation, and particularly relates to multi-element doped ZnO voltage-sensitive ceramic as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) mixing a gallium source, a nickel source, a zirconium source, aluminum nitrate and a solvent, and adjusting the pH value to 7-8 to obtain a mixed solution; the gallium source comprises gallium nitrate and / or gallium acetate; the nickel source comprises nickel nitrate and / or nickel acetate; the zirconium source comprises zirconium nitrate and / or zirconium acetate; the molar ratio of the gallium source to the nickel source to the zirconium source is (0.2-1.5): (0.5-1.8): (0.2-1); and (2) mixing the mixed solution with the remaining raw materials to obtain a mixture, granulating and forming to obtain a green body, and sintering. The gallium source, the nickel source and the zirconium source are used as raw materials in the form of salt at the same time, the prepared ZnO voltage-sensitive ceramic has large discharge-current capacity, high voltage gradient, low leakage current and low residual voltage ratio, the comprehensive performance meets the ionization protection requirement, for example, the ZnO voltage-sensitive ceramic is used for overvoltage protection of lightning protection insulators and ionization equipment.