32 results about "Nickel ferrite" patented technology

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 a polyurethane flame-retardant sound-insulation composite board with a multi-layer structure and a preparation method thereof, and belongs to the technical field of composite boards, nickel nitrate is used as a nickel source, ferric nitrate is used as an iron source, nickel ferrite powder is obtained through a solvothermal method and a high-temperature calcination method, the nickel ferrite powder is compounded with graphene oxide to obtain composite aerogel powder, the surface of the composite aerogel powder is coated with polydopamine, and the flame-retardant sound-insulation composite board with the multi-layer structure is obtained. The enhanced aerogel powder is obtained; the preparation method comprises the following steps: preparing functional rigid polyurethane foam from polyether polyol, polymethylene polyphenyl polyisocyanate, enhanced aerogel powder, ammonium polyphosphate, magnesium hydroxide and a foaming aid through a one-step foaming method, putting the functional rigid polyurethane foam as a core layer between an aluminum-magnesium-manganese alloy color steel plate and a porous sound insulation plate, and carrying out hot-pressing compounding, so as to obtain the aluminum-magnesium-manganese alloy color steel plate / porous sound insulation plate. The polyurethane flame-retardant sound-insulation composite board with the multi-layer structure is obtained; and comprehensive improvement of flame retardance, sound insulation, heat insulation, electromagnetic shielding and dimensional stability is realized.

The invention belongs to the technical field of carbon dioxide capture and regeneration, and particularly relates to a magnetic nanofluid pseudo-homogeneous-microwave synergistic carbon dioxide desorption method. The invention provides an application of a nickel ferrite material as a catalyst in carbon dioxide absorption pregnant solution regeneration. According to the invention, the carrier-free and undoped spinel-type structure NixFe3-xO4 is used as a catalyst for carbon dioxide absorption rich liquid regeneration, and the catalyst has microwave absorption, catalytic activity and magnetic responsiveness. According to the desorption method provided by the invention, the nickel ferrite material forms a stable quasi-homogeneous dispersion system in the carbon dioxide absorption rich solution, and then under the conditions of low-temperature microwave radiation and stirring, the CO2 desorption load rate reaches more than or equal to 55% within 10-30 min, the desorption reaction rate is increased by more than or equal to 20% compared with that of traditional thermal regeneration, and the desorption time is reduced by more than half compared with that of traditional thermal regeneration.

A method of preparing a nickel ferrite-based eutectic ceramic inert anode material, in which a mixture powder of NiFe2O4-based spinel powder and nickel oxide-based powder is mixed with a binder, and granulated to obtain a granular material; the granular material is subjected to compression molding under 100-200 MPa to obtain a green body, which is pre-sintered to obtain a pre-sintered body; the pre-sintered body is melted in an inert gas atmosphere to obtain a molten material; the molten material is cooled at a rate of 1-100° C. / min and solidified to obtain a ceramic solidified body; and the ceramic solidified body is processed at 1250-1400° C. for 2-6 h, and cooled to room temperature at a rate of 1-50° C. / min to obtain the nickel ferrate-based eutectic ceramic inert anode material.

The invention discloses a welding method for nickel ferrite-based metal ceramic and metal. The welding method for the nickel ferrite-based metal ceramic and the metal comprises the following steps that the to-be-welded face of nickel ferrite ceramic is ground and polished, and the to-be-welded nickel ferrite ceramic is obtained; the metal powder is put into a ball mill for ball milling, and brazing filler metal with uniform components is obtained; to-be-welded nickel ferrite ceramic and metal are placed in acetone to be subjected to ultrasonic cleaning, and the cleaned nickel ferrite ceramic and metal are obtained; and the cleaned nickel ferrite ceramic and metal are welded with brazing filler metal, and welding of the nickel ferrite-based metal ceramic and metal is completed. The invention provides a nickel ferrite-based metal ceramic and metal welding method. The nickel ferrite-based metal ceramic and metal welding method has the advantages of being easy to operate, few in process, low in cost, high in welding speed and the like.

The present invention relates to a process for fabricating an electrochemical device based on praseodymium-doped nickel-ferrite nanoparticles and an electrochemical device thereof. The nickel ferrites are synthesized using solution combustion method, with praseodymium doping concentrations varying from 0 to 0.02. The prepared nanoparticles are characterized for thorough analysis of their structural, morphological, and electrochemical properties, wherein a three-electrode system is developed for evaluation of electrochemical performance of the prepared nanoparticles. The results showed that optimal Pr-doping enhanced both the electrical conductivity and charge storage capacity of the material, wherein the sample with 0.01 Pr-doping (NP-3) exhibited the highest specific capacitance of 69.2 F / g at a current density of 0.1 A / g, with a low charge transfer resistance of 0.30 Ω, making it suitable for energy storage devices.

This application provides an electromagnetic shielding nanofiber composite membrane and its preparation method, belonging to the field of electromagnetic shielding material preparation technology. The electromagnetic shielding nanofiber composite membrane provided in this application includes a three-dimensional framework substrate, and conductive and magnetic media uniformly dispersed in the three-dimensional framework substrate. The substrate and the conductive and magnetic media form a special three-dimensional network porous structure through overlap and adsorption. The composite membrane provided in this application has a thickness of 20-30 μm, an electromagnetic shielding effectiveness of 59 dB, and a maximum tensile stress of 12 MPa. The preparation method of this composite membrane is as follows: carboxylated carbon nanotubes, copper nanowires, and nickel ferrite are uniformly loaded into PVA-co-PE nanofibers through vacuum-assisted filtration, cross-linking, and hot pressing processes. The membrane can be formed in a single filtration step. The preparation method is simple and has good repeatability.

The application discloses a kind of nickel ferrite solid-state reference electrode for concrete and its design method, nickel ferrite solid-state reference electrode for concrete, including tube body and wire, cement paste layer, alkaline colloid layer, electrode material layer, conductive layer and packaging layer are sequentially arranged in tube body, one end of wire passes through packaging layer and is connected with conductive layer.Design method includes the following steps: the resistivity of cement paste layer, alkaline colloid layer, electrode material layer, conductive layer and packaging layer is calculated;Determine the target resistance and inner diameter size of nickel ferrite solid-state reference electrode;The thickness of cement paste layer, alkaline colloid layer, electrode material layer, conductive layer and packaging layer is calculated;Prepare nickel ferrite solid-state reference electrode for concrete.The general reference electrode is prepared in the application, the contact area of electrode layer and conductive layer increases, since the conductive performance of conductive layer is significantly better than electrode layer material, use the electrode material containing nickel ferrite, the potential stability and repeatability of prepared reference electrode are significantly improved.

The invention discloses a film-forming lubricating wear-resistant lead screw working fluid and a preparation method thereof. The processing liquid is prepared from the following components in parts by weight: 12 to 28 parts of surface modified nano nickel ferrite, 2.5 to 8.5 parts of ferroferric oxide, 6 to 15 parts of a compound adhesive, 8 to 22 parts of a compound dispersant, 0.8 to 3.2 parts of a compound antioxidant and 50 to 99 parts of base oil. The preparation method comprises the steps of step-by-step modification, ultrasonic dispersion and high-shear homogenization. Through a magnetic synergistic lubrication system and a rapid film forming technology, the technical problems of insufficient lubrication performance, poor wear resistance and difficult film forming of the traditional screw rod working fluid are solved. Compared with the traditional cutting fluid, the optimal embodiment of the invention realizes the remarkable effects that the friction coefficient is reduced by 57.1%, the tool wear is reduced by 42.5%, the surface roughness is improved by 60.4%, and the dispersion stability exceeds 30 days.

A transmission line is disclosed which includes a first conductor, a second conductor, a composite disposed between the first conductor and the second conductor, the composite includes non-linear inclusions comprising one or more of non-linear dielectric and non-linear magnetic inclusions mixed in a matrix material, wherein the non-linear dielectric inclusions are selected from the group consisting of barium strontium titanate (BST), barium titanate, strontium titanate, barium zirconate titanate, lead zirconate titanate, lead titanate, lithium niobate, potassium niobate, lead scandium tantalate, strontium barium niobate, and combinations thereof, and the non-linear magnetic inclusions are selected from the group consisting of nickel zinc ferrite (NZF), manganese zinc ferrite, cobalt ferrite, manganese ferrite, zinc ferrite, nickel ferrite, and combinations thereof, wherein the non-linear inclusions by volume are about 25% NZF, about 10% BST / 15% NZF, and about 15% BST / 10% NZF, and wherein the first conductor, the second conductor, and the composite form a capacitor.

The application belongs to the technical field of metal-ceramic interface wetting, and relates to a titanium-doped nickel ferrite ceramic body for improving interface wetting, a preparation method and application thereof. The preparation raw material of the titanium-doped nickel ferrite ceramic body comprises nickel ferrite powder and titanium powder. The mass percentage of the nickel ferrite powder is more than 90wt% and the mass percentage of the titanium powder is less than 10wt% based on 100wt% of the total mass percentage of the nickel ferrite powder and the titanium powder. The particle size D50 of the nickel ferrite powder is less than 50um. The particle size D50 of the titanium powder is less than 30um. The titanium-doped nickel ferrite ceramic body improves the wetting between the nickel ferrite ceramic body and Cu, makes the interface connection between the nickel ferrite ceramic body and the metal copper compact, free of obvious holes and cracks, and improves the three-dimensional interlocking quality of the metal copper and the nickel ferrite ceramic.

The application relates to the field of photocatalysis, in particular to a composite photocatalyst for removing methylene blue and a preparation method and application thereof. The preparation method of the composite photocatalyst for removing methylene blue comprises the following steps: mixing a mixed solvent containing choline chloride, ethylene glycol and water, a nickel source, an iron source and citric acid, and performing a complexing reaction, then adjusting the pH value of the reaction system, and performing a self-propagating reaction by heating to obtain a precursor; the precursor is calcined to obtain the composite photocatalyst; the main components of the composite photocatalyst include NiFe2O4, alpha-Fe2O3 and Ni3Fe. The composite photocatalyst with the main components of NiFe2O4, alpha-Fe2O3 and Ni3Fe can be obtained by adopting the method, the composite photocatalyst can overcome the shortcomings of pure nickel ferrite and alpha-Fe2O3 as photocatalysts, and the photocatalytic capacity is further improved.

The invention discloses a preparation method of a magnetic super composite material with a weak negative dielectric constant, and relates to the technical field of electromagnetic super material preparation. Metal nickel powder and bismuth ferrite powder are poured into a ball milling tank, absolute ethyl alcohol is added as a ball milling medium, and a ball mill is started for mixing; placing the ball-milled wet material in drying equipment, and removing the absolute ethyl alcohol to obtain a dried mixed material; pressing the green body; sintering at high temperature; magnetic field treatment. According to the invention, metal nickel is taken as a conductive functional phase, bismuth ferrite is taken as a precursor, and a nickel and nickel ferrite percolation system is constructed through the processes of wet ball-milling mixing, blank pressing, high-temperature sintering under argon protection and external magnetic field treatment, so that the regulation and control of the percolation structure and carrier transport operation of the composite material are realized; and finally obtaining the magnetic super-composite material with weak negative dielectric constant and large saturation magnetization intensity in the target frequency band, wherein the absolute value of the real part of the dielectric constant is less than 1000.

The invention provides a preparation method of a nickel-iron sulfide loaded MOF (Metal Organic Framework)-based electrolytic seawater catalyst. The preparation method comprises the following steps: firstly, growing a ferro-nickel metal organic framework material NiFe-MOF on the surface of foamed nickel in situ through a solvothermal method; and then, part of NiFe-MOF is subjected to in-situ conversion into nickel iron sulfide nanoparticles by utilizing a vapor deposition technology, so that the sulfide-loaded NiFe-MOF (NiFe-MOF-S) is formed. The material can realize high activity and super durability required by direct seawater electrolysis in an alkaline seawater electrolyte. When the prepared sulfide-loaded NiFe-MOF material is used for seawater electrolysis oxygen evolution reaction, the electrocatalyst shows relatively low overpotential and good long-term operation stability.

The application provides a catalyst prepared by using waste polyester spun fabric and nickel-containing solid waste, a preparation method and application. The catalyst is prepared by using a water solvent method to load BDC and metallurgical solid waste product nickel ferrite. The MOF catalyst has the advantages of large specific surface area, excellent catalytic effect, high activity of loaded compounds and CO2 cracking effect higher than that of a single catalyst. Compared with the prior art, the catalyst prepared by introducing waste polyester spun fabric and nickel-containing solid waste can make important progress in environmental governance and resource utilization, and can crack CO2 by using the obtained catalyst while comprehensively utilizing the waste, thereby reducing the CO2 concentration in the atmosphere, and providing a new idea and direction for promoting sustainable development.

The invention discloses a preparation method and device of electrolytic magnesium, and belongs to the technical field of metal smelting. According to the method, a nickel ferrite-based eutectic ceramic inert anode and liquid metal lead or / and tin alloy are adopted as a cathode, and an industrial MgO raw material is electrolyzed in a MgF2-CaF2-LiF molten electrolyte at the temperature of 800-900 DEG C; after the magnesium-lead-tin alloy is generated through electrolysis, the high density of the metal lead-tin alloy is used for achieving effective isolation of the vacuum chamber and the electrolytic bath, and then the metal pure magnesium is obtained through online vacuum distillation separation by means of the vapor pressure difference of the metal lead-tin alloy and magnesium. According to the method, zero carbon emission in the electrolysis process can be achieved, and the used nickel ferrite-based eutectic ceramic anode can greatly improve the electrolysis current efficiency and the corrosion resistance; by adopting the lead-tin cathode liquid electrode, the production cost can be reduced; and the mode of separating the metal magnesium through online distillation can reduce the distillation energy consumption, and has remarkable environmental protection benefits and economic benefits.

The invention discloses a preparation method and application of eutectic composite metal ceramic. The method comprises the following steps: mixing ytterbium oxide, nickel oxide and iron oxide, carrying out pressure molding to obtain a green body, sintering the green body in an air atmosphere to obtain a sintered body, and melting, cooling and crushing the sintered body to obtain eutectic ceramic particles; and the eutectic ceramic particles, nickel ferrite powder and an adhesive are mixed and molded, then calcined, degummed and fired, and the eutectic composite metal ceramic is obtained. According to the method, a metal powder raw material is not used, a metal phase is separated out at the grain boundary of eutectic particles in an in-situ oxygen loss mode, and the corrosion resistance of the material is greatly improved on the basis that the conductivity of the material is guaranteed. The prepared eutectic composite metal ceramic inert anode material has important application in the fields of zero-carbon molten salt electrolytic aluminum, zero-carbon molten salt electrolytic magnesium, zero-carbon molten salt electrolytic rare earth, zero-carbon molten salt electrolytic carbon dioxide and the like.

FIELD: welding.SUBSTANCE: invention can be used for welding a ceramic inert anode based on nickel ferrite and a metal conductive block of an aluminium electrolyser. A ceramic inert anode based on nickel ferrite and a metal conductive block is produced and processed to form the surfaces to be joined. Producing a transition metal alloy foil and attaching the surfaces to be joined of a ceramic inert anode and a metallic conductive block, respectively, to two surfaces of the transition metal alloy foil to form a prefabricated connecting body. Vacuum diffusion welding is performed on a prefabricated connecting body at a diffusion temperature of 950 to 1200 °C, heating speeds from 10 to 30 °C / min, thermal insulation time from 2 to 20 min, pressure from 5 to 30 MPa and cooling rate from 4 to 8 °C / min.EFFECT: improved efficiency.6 cl, 3 dwg, 3 ex

The invention discloses a nickel ferrite catalytic material as well as a preparation method and application of the nickel ferrite catalytic material with a controllable crystal face, and belongs to the technical field of electro-catalysis. The preparation method comprises the following steps: fixing a conductive substrate in a cavity of a magnetron sputtering coating machine, ensuring that the substrate is parallel to a target surface, and setting a target-substrate distance to be 2-20cm; the cavity of the magnetron sputtering coating machine is pre-vacuumized, and glow cleaning is carried out after inert gas is introduced; nickel ferrite is used as a target material, a nickel ferrite catalytic layer is deposited in situ on the surface of the conductive base material through physical vapor deposition, and the nickel ferrite catalytic material is obtained. According to the method, the magnetron sputtering technology is adopted, the target-substrate distance is changed, effective regulation and control over the nickel ferrite crystal face structure are successfully achieved, and the electronic structure and the surface adsorption / desorption energy barrier of the material can be remarkably influenced by the fine change of the crystal structure; therefore, three bottlenecks of low activity, poor stability and slow dynamics confronted by nickel ferrite as an OER catalyst are synchronously broken through, and key material and technical support is provided for commercial application of an AEM electrolytic cell.

The invention relates to high-silicon molybdenum-nickel ferrite heat-resistant vermicular graphite cast iron and a preparation method thereof. The high-silicon molybdenum-nickel ferrite heat-resistant vermicular graphite cast iron comprises the following elements in percentage by weight: 2.80%-3.20% of carbon, 4.20%-4.80% of silicon, less than 0.30% of manganese, less than 0.050% of phosphorus, less than 0.020% of sulfur, 0.50%-1.0% of nickel, 0.40%-0.90% of molybdenum, 0.10%-0.50% of chromium, 0.05%-0.50% of niobium, 0.05%-0.50% of vanadium, 0.010%-0.020% of magnesium, less than 0.20% of copper, 0.10%-0.20% of titanium, less than 0.05% of rare earth and the balance of iron. The material has good high-temperature mechanical properties and high-temperature oxidation resistance, does not generate a microscopic structure with stable phase change as far as possible in a range from room temperature to working temperature, is small in thermal expansion coefficient, and can greatly improve the use performance and prolong the service life of the turbocharger.

The invention discloses a nickel ferrite-based electromagnetic wave-absorbing composite material and a preparation method thereof, and belongs to the technical field of wave-absorbing materials, nickel ferrite nano porous particles are subjected to carbon heat treatment to obtain heat-treated nickel ferrite matrix powder, and then a two-dimensional molybdenum disulfide nanosheet is loaded on the surface of the heat-treated nickel ferrite matrix powder with a three-dimensional structure to obtain the nickel ferrite-based electromagnetic wave-absorbing composite material. And finally, the nickel ferrite / molybdenum disulfide composite powder is subjected to surface modification through a conductive polymer polyaniline, and the electromagnetic wave-absorbing composite material based on the nickel ferrite can be obtained. The effective bandwidth of the electromagnetic wave-absorbing composite material can reach 9 GHz under the thickness of 2 mm through multi-stage cooperation of oxygen vacancies, sulfur vacancies, conductive coating, heterostructures and other characteristics, and continuous coverage of 8-18 GHz is achieved.

The invention relates to the technical field of catalysts, in particular to a supported chromium-based catalyst as well as a preparation method and application thereof. The supported chromium-based catalyst comprises a carrier and chromium oxyfluoride; the carrier comprises spinel type nickel ferrite, the chemical formula of the spinel type nickel ferrite is M1-xNixFe2O4, x is more than or equal to 0.5 and less than or equal to 1, and M comprises at least one of Zn, Co, Cu, Mn, Mg, Ba and Sr. When the supported chromium-based catalyst is used as a catalyst for a fluorination reaction, the fluorination reaction has high conversion rate and selectivity, and in addition, the catalyst also has the advantage of long service life.

The invention provides a ternary eutectic metal ceramic material and application thereof. In the melting process of a nickel oxide ceramic phase and a nickel ferrite ceramic phase, at least one of Cu and Ni metal particles is subjected to in-situ precipitation in a ceramic phase melt, so that the metal particles are uniformly dispersed and distributed between the nickel oxide ceramic eutectic phase and the nickel ferrite ceramic eutectic phase, and finally the ternary eutectic composite material of the metal phase, the nickel oxide phase and the nickel ferrite phase is formed. According to the invention, the balance of corrosion resistance and conductivity of the material can be realized by changing the ratio of the raw materials and adjusting the proportion of phases of the ternary eutectic, so that the basic requirements of the molten salt electrolysis industrial field on the performance of the inert anode material can be met.

The invention discloses a method for strengthening degradation and conversion of lignocellulose through photo-Fenton treatment, which comprises the following steps: (1) mixing crushed straws with a hydrogen peroxide solution, activated carbon doped nickel ferrite nanoparticles and deionized water to obtain a mixed solution; (2) carrying out white light irradiation on the mixed solution while carrying out oscillation treatment, and then carrying out solid-liquid separation to obtain supernate and residues; and (3) performing enzymolysis saccharification on the residues. The straw is pretreated by adopting a photocatalysis and Fenton reaction synergistic mode, so that the effects of degrading and removing lignin, well retaining cellulose and efficiently performing enzymolysis saccharification are achieved.

The application provides a preparation method of a nickel ferrite catalyst, and comprises the following steps: a) dissolving Ni(NO3)2 . 6H2O, Fe(NO3)3 . 9H2O in a mixed solvent to obtain a mixed metal salt solution; the mixed solvent is a mixed solvent of water and an alcohol solvent; b) adding a basic solution dropwise into the mixed metal salt solution to obtain a mixed solution; c) performing heat treatment on the mixed solution, and then performing solid-liquid separation to obtain an initial nickel ferrite powder; and d) performing annealing treatment on the initial nickel ferrite powder in a reducing atmosphere to obtain the nickel ferrite catalyst. The preparation method is simple and efficient, and can effectively solve the problems of low oxygen vacancy density of the nickel ferrite, unstable vacancy structure and high preparation cost, improve the OER performance of water electrolysis hydrogen production, and can be successfully used in the field of industrial water electrolysis under high current density.

The invention relates to the technical field of target material preparation, and provides a nickel ferrite target material and a preparation method thereof.The preparation method comprises the steps that NiO powder and Fe2O3 powder are provided and sequentially subjected to mixed ball milling, drying and calcination treatment with a dispersing agent and a solvent, and NiFe2O4 calcined powder is obtained; the A-doped Fe3O4 powder, NiFe2O4 calcined powder, a dispersing agent and a solvent are mixed, ball-milled and dried, and mixed powder is obtained; a is selected from at least one of MnO2, CuO, CoO, Cr2O3 and MgO; and carrying out pre-pressing treatment and hot-pressing treatment on the mixed powder, and then machining to obtain the nickel ferrite target material. The A-doped Fe3O4 powder is introduced, and Fe < 2 + > and Fe < 3 + > exist on octahedral sites in a crystal structure of the A-doped Fe3O4 powder at the same time, so that electron exchange can be realized through an oxygen ion bridge, a conductive path is constructed in the material, the conductivity of the target material is improved, and the requirement of a direct-current sputtering process is met.

The invention belongs to the technical field of powder metallurgy, and particularly relates to a multi-component high-entropy alloy nickel ferrite composite anode material and a preparation method thereof. Through cooperation of the high-entropy alloy and the nickel ferrite, the overall performance of the anode is remarkably improved, the high-entropy alloy provides good conductivity and structural support, and the nickel ferrite provides excellent corrosion resistance and electrochemical inertness. Moreover, the preparation method of the anode material is controllable in process, rich in raw materials and suitable for industrial amplification. The result of the embodiment shows that the anode material provided by the invention is high in density and excellent in corrosion resistance.

The application relates to the technical field of target material preparation, and provides a nickel ferrite target material and a preparation method thereof, which comprises the following steps: providing NiO powder and Fe2O3 powder, and sequentially mixing, ball milling, drying and calcining the NiO powder and the Fe2O3 powder with a dispersant and a solvent to obtain NiFe2O4 calcined powder; mixing, ball milling and drying Fe3O4 powder doped with A, the NiFe2O4 calcined powder, the dispersant and the solvent to obtain mixed powder; A is at least one selected from MnO2, CuO, CoO, Cr2O3 and MgO; and the mixed powder is subjected to pre-pressing treatment and hot-pressing treatment, and then is machined to obtain the nickel ferrite target material. The Fe3O4 powder doped with A is introduced, Fe 2+ and Fe 3+ exist on octahedral sites in the crystal structure of the Fe3O4 powder doped with A, so that electron exchange can be realized through oxygen ion bridges, a conductive path is constructed in the material, the conductivity of the target material is improved, and the direct-current sputtering process requirement is met.

The application relates to the field of material preparation, and relates to an aluminum and phosphorus co-doped heterostructure cobalt trioxide / iron nickel oxide / foam nickel composite nanomaterial and a preparation method and application thereof. The aluminum and phosphorus co-doped heterostructure cobalt trioxide / iron nickel oxide / foam nickel composite nanomaterial has a heterostructure of two-dimensional nanosheet layers grown on nanowires, is beneficial to mass and charge transmission, changes the electronic structure of Co3O4 and NiFe2O4 through aluminum and phosphorus co-doping, further improves the electrocatalytic performance, meanwhile, the aluminum and phosphorus co-doped heterostructure cobalt trioxide / iron nickel oxide / foam nickel composite nanomaterial preparation method adopts simple raw materials and process equipment, is low in cost, is beneficial to large-scale production, is expected to produce good social and economic effects, and has good catalytic electrolytic water oxygen evolution reaction activity in an alkaline environment.

The invention discloses a preparation method of a copper-nickel ferrite carbon nanotube and an application of the copper-nickel ferrite carbon nanotube in activating persulfate to degrade reactive black, and the preparation method comprises the following steps: by taking a hydroxyl carbon nanotube as a carrier, preparing a novel copper-nickel ferrite hydroxylated multi-walled carbon nanotube catalyst MWCNTs-OH / CuNiFe2O4 by using a coprecipitation method in a loading manner; the catalyst is used for activating peroxymonosulfate (PMS) and degrading active black RB5; results show that the degradation rate can finally reach 98.48% after the reaction time of 120 min under the room temperature condition, the peroxymonosulfate PMS is synergistically activated through the synergistic effect of the hydroxyl carbon nanotubes and the copper-nickel-iron metal, and efficient degradation of the active black RB5 can be completed under the simple condition; the invention provides a feasible strategy for efficiently degrading the active black, and has excellent popularization and application prospects.