104 results about "Ferrocobalt" patented technology

The invention discloses a preparation method and application of an efficient photoelectrocatalytic water-decomposition oxygen-production electrode. According to the preparation method, with a three-dimensional porous pucherite nanofilm as a substrate, a ferrocobalt hydroxide/pucherite (CoFe-H/BiVO4) composite catalytic photoanode is prepared through an electrochemical deposition method. The amorphous catalyst CoFe-H shows excellent electrochemical catalysis oxygen-production performance (the Tafel value is about 28 mV/decade) and good light transmission. The CoFe-H/BiVO4 composite photoanode prepared through the method has a high-quality catalyst/semiconductor interface, so that the capacity to absorb visible light is enhanced to a great extent, and effective generation and efficient utilization of photon-generated carriers are achieved. Under the 100 mw/cm<2> sunlight simulation condition, the light current density of the CoFe-H/BiVO4 composite photoanode can reach 2.48 mA/cm<2> under 1.23 V. Meanwhile, the preparation method of the composite photoanode is simple, efficient and environmentally friendly, the raw material cost and the synthesis cost are low, and the preparation method is suitable for industrial application of photoelectrocatalytic water-decomposition oxygen production and has broad scientific significance.

The invention discloses a nitrogen-doped graphene/ ferrocobalt hydrotalcite-like compound non-precious metal difunctional oxygen-reduction catalyst and a preparing method and application thereof. A bimetallic oxide is used as a precursor, the memory effect of a hydrotalcite-like compound is utilized, oxidized graphene and the ferrocobalt hydrotalcite-like compound are assembled, and then the compound is doped with carbon nitride nanosheets under the reduction condition to obtain a nitrogen-doped graphene/ ferrocobalt hydrotalcite-like compound composition. The oxygen-reduction catalyst has high catalytic activity to oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) at the same time under the alkaline condition and has high stability and excellent methyl alcohol tolerance, the cost of adopted raw materials is low, the preparing method is simple, operation is easy, and large-scale production can be achieved conveniently.

The invention belongs to the field of new energy materials and electrochemical energy conversion devices, and particularly relates to ferrocobalt selenide and a preparation method and application thereof. Ferrocobalt selenide is prepared by means of a two-step hydrothermal method, firstly, a ferrocobalt basic carbonate precursor with a uniform and dense nanosheet shape is prepared by adopting a first-step hydrothermal reaction, and secondly, the precursor is selenized through second-step hydrothermal treatment on the premise of not damaging the uniform and dense nanosheet shape; the preparation method is simple, safe, efficient and controllable. When ferrocobalt selenide is used as an oxygen generating catalyst, since ferrocobalt selenide has a spinel structure, selenized ferrocobalt selenide is a thin nanosheet, more catalytic active sites are exposed, ferrocobalt selenide has high catalytic activity, the starting voltage of the catalyst is low, the overvoltage at a place of 10 mA m<2> is 217 millivolts, and ferrocobalt selenide has electrochemical properties such as lower Tafel slope and good catalytic stability.

The invention discloses a magnetic nano composite catalyst, in particular to a preparation method of a ferrocobalt oxide/graphene magnetic nano composite catalyst and an application of the magnetic nano composite catalyst in degrading organic wastewater. The catalyst acts on sulfate radicals with a strong oxidizing property generated by peroxysulfate and therefore efficiently removes organic matters from the wastewater. The catalyst serving as a solid phase catalyst has larger specific surface area, higher catalytic activity and a lower ion release rate, so that the catalyst can continuously and efficiently activate the sulfate radicals generated by peroxysulfate and effectively reduce cobalt ion leakage. The preparation method of the catalyst is simple; the catalyst has high catalytical performance, does not cause secondary pollution and is an environment-friendly material; since the catalyst is magnetic and can be recycled after reaction, the treatment cost of the organic wastewater is lowered; wide application prospects are provided for the treatment of the degradation-resistant organic wastewater.

The invention provides an application of magnesium oxide-loaded ferrocobalt metal magnetic nanometer material on degrading orange colour II in wastewater, which is particularly applied to degrading organic pollutant orange colour II in the wastewater. The magnesium oxide-loaded ferrocobalt metal magnetic nanometer material has the chemical formula of CoxFey/MgzO and is prepared by roasting magnesium cobalt molten iron talc (MgzCoxFey(CO3)w(OH)2.mH2O) serving as a precursor at high temperature under the environment of shielding gas. At room temperature, the material and hydrogen peroxide form a heterogeneous Fenton system for processing the organic pollutant orange colour II in the wastewater when the pH is neutral, and the material has good processing effect. Compared with the traditionalFenton system, the system is characterized in that solid and liquid are easy to separate, and no new impurities are lead into the water so as to avoid secondary pollution of water quality in the water treatment process. The invention has the advantages of simple technical operation, high efficiency, low cost, wider pH applicable range and better practical application value.

The invention discloses a preparation method for a self-support ferrocobalt phosphide nanosphere electrocatalyst, and relates to the preparation method of the electrocatalyst. The preparation method comprises the steps that firstly, commercial cobalt chloride hexahydrate, ferric trichloride hexahydrate, ammonium fluoride and urea are weighed, a nickel net is adopted, then the weighed reagents aremixed and stirred to obtain a mixed reagent, a reaction is conducted for some time in a reaction kettle, and a precursor is obtained; the obtained precursor is calcined in a tube furnace, and CoFeP isobtained. The preparation method is low in cost, the preparation technology is simple, ferrocobalt phosphide nanospheres have the larger specific surface areas, and more active sites are exposed. When the molar ratio of an iron source to a cobalt source is 1:2, the reaction is conducted for 10 hours in a drying oven, the ferrocobalt phosphide nanospheres have good stability and good catalytic activity, no other adhesive agents are needed, and electron transmission is increased. The preparation method is applied to the field of fossil fuel.

In the invention, pore templet in Nano alumina is prepared by method of electrochemic anode oxidation, and nano line array of ferrocobalt is prepared by method of electrochemic deposition. Diameter of line array of ferrocobalt is in 10nm-50nm, constituent of ferrocobalt is as CoxFe1-x , 20 more than or equal to 20 and less than or equal to 0.60. low temperature annealing of Nano line array of ferrocobalt obtained from electrochemic deposition obtains thin film material of permanent magnetism, performances of which are best when content of cobalt is 30%-40%, and diameter of Nano line is as 10nm-22nm.

The invention discloses an in-situ composite electrode of a nitrogen-phosphorus co-doped carbon nanotube coated ferrocobalt bimetallic alloy catalyst and preparation method thereof, and application ofin-situ composite electrode. The preparation method comprises the following steps of: preparing an in-situ flaky MOF precursor on a carbon paper substrate; dipping the carbon paper on which the MOF precursor grows into a ferrous sulfate solution, and obtaining iron-containing MOF in the cation exchange process of the aqueous solution; after drying, putting the iron-containing MOF into a reactionkettle containing a phosphorus source, and performing heating to achieve gas-phase phosphorus doping; and in Ar gas flow or N2 gas flow, discharging urea for annealing and in-situ preparation of the carbon nanotubes. The product obtained by the technical scheme provided by the invention constructs a variety of high electrocatalytic active sites, and includes metal particles coated at the top end of a carbon nanotube and nitrogen-phosphorus co-doped carbon active sites. The in-situ composite electrode provided by the invention has the excellent and stable three-function catalytic activity of HER, OER and ORR.

The invention discloses a flue gas desulfurization and denitration agent, a preparation method and application thereof. The flue gas desulfurization and denitration agent comprises the following components: 70-93 parts by weight of carbide slag, 5-25 parts by weight of magnesium oxide, and 1-5 parts by weight of a catalyst, wherein the catalyst is selected from one or more of TiO2, Al(OH)3, V2O5,WO3, K2O, binuclear ferrocobalt phthalocyanine (II) or CaSiO3, and the flue gas desulfurization and denitration agent does not contain calcium oxide. The flue gas desulfurization and denitration agentprovided by the invention can remove SO2 and NOX from flue gas simultaneously. In addition, during use of the flue gas desulfurization and denitration agent provided by the invention, under the premise of satisfying high desulfurization and denitration efficiency, the carbide slag dosage needed by unit removal can be significantly reduced.

The invention provides a torsional mode guided-wave magnetostrictive sensor based on a double-ring permanent magnet array. The sensor mainly comprises two symmetrical semi-ring sensor components which are connected and coated on the pipeline surface through an elastic fastener. Each semi-ring sensor component mainly comprises a double-row permanent magnet array, two ferrocobalt strips, detection coils, a rubber shell and an epoxy resin layer; the two ferrocobalt strips are pre-bent into an arc to adapt to an outer diameter of a tested pipeline, and two sides are fixed by a molding base; the detection coil is wound on the two ferrocobalt strips in a fixed spacing manner, and alternating current is introduced to form an alternating magnetic field along the length direction of the ferrocobalt strips; rectangular permanent magnets in the double-row permanent magnet array are adsorbed on the outer sides of the ferrocobalt strips in the same direction, and a static magnetic field along the width direction of the ferrocobalt strips is provided. Alternating current signals with a phase difference of 90 degrees are introduced into two groups of detection coils in the sensors, and direction controllable torsional mode guided-waves are generated to be used for pipeline defect detection.

The invention discloses a two-dimensional conductive metallic organic compound array material, a preparation method and application. The material comprises a three-dimensional substrate as a carrier and two-dimensional conductive metallic organic compound nanosheets grown on the three-dimensional substrate, wherein the conductive nanosheets are metallic organic compound nanosheets of nickel, ferronickel, nickel manganese, nickel cobalt, nickel tantalum and 2,5-thiophene dicarboxylic acid when the three-dimensional substrate is foamed nickel; when the three-dimensional substrate is foamed iron,the conductive nanosheets are metallic organic compound nanosheets of ferronickel, ferromanganese, ferrocobalt, ferrobismuth and 2,5-thiophene dicarboxylic acid; and when the three-dimensional substrate is foamed copper, the conductive nanosheets are metallic organic compound nanosheets of copper bismuth and 2,5-thiophene dicarboxylic acid. The array has excellent conductivity and a regularly arranged two-dimensional array structure, is capable of implementing charge and substance conduction effectively, and thus has wide application prospects in fields such as energy and catalysts.

A surface treated steel plate for battery cases having an improved electrical contact with the battery positive electrode active material, its manufacturing method, a battery case, and a battery are disclosed. The surface treated steel plate has a graphite-dispersed nickel plating layer in which graphite is dispersed or a graphite-dispersed nickel alloy plating layer at least on the inner surface of a battery case. The alloy plating layer is preferably of a nickel-cobalt alloy, a nickel-cobalt-iron alloy, a nickel-manganese alloy, a nickel-phosphorus alloy, or a nickel-bismuth alloy. The battery case is produced by forming the surface treated steel plate by drawing, DI, or DTR. The battery uses the battery case.

The invention relates to a preparation method for a mono-dispersed lithium iron phosphate and lithium ferrocobalt phosphate core-shell structured composite cathode material. A core material of the core-shell structured cathode material is lithium iron phosphate and is obtained by a solvothermal synthesis method, and a shell material of the core-shell structured cathode material is a lithium ferrocoablt phosphate material and is obtained by the solvothermal synthesis method and growing the lithium ferrocoablt phosphate material on the surface of the lithium iron phosphate core material. By the preparation method, the problems of long reaction time, high reaction temperature, low energy density, low discharge specific capacity, large energy waste and the like in the prior art are solved better.

The invention belongs to a method for synthesizing a nanometer material from top to bottom by a physical mode, and discloses a method for synthesizing a cobalt oxide and ferrocobalt layered bimetal hydroxide compound. The method comprises the steps of taking a block-shaped ferrocobalt alloy target as a raw material, and polishing and cleaning to remove an oxide layer on a surface; placing the block-shaped ferrocobalt alloy target in a container, and adding a sodium chloride solution to a position above the alloy target by 3-4 centimeters; performing ablation on the alloy target for 20-30 minutes by employing a nanosecond pulse laser liquid phase with a wavelength being 1,064 nanometers; and finally, taking out a brown solution in the container, performing freezing and drying to obtain a powder compound product after centrifugation. The ferrocobalt alloy target in the sodium chloride solution is ablated by a nanosecond laser liquid phase ablation technology to obtain the cobalt oxide and ferrocobalt layered bimetal hydroxide compound, the defect of poor conductivity of the material is effectively overcome by a synergistic effect of the cobalt oxide and ferrocobalt layered bimetal hydroxide, and meanwhile, the catalytic activity of water electrolysis to generate oxygen is also greatly improved; and the method is simple in process, ingenious in design and low in cost, and is safe and controllable.

The invention belongs to the technical field of functionalized nanometer electrode materials, and relates to a preparation method of low-crystallinity zirconium-doped ferrocobalt layered double hydroxide. The preparation method comprises the following steps: dissolving a divalent cobalt source, a trivalent iron source and a tetravalent zirconium source in a deionized water solution of potassium nitrate, and carrying out stirring at a constant speed to fully and uniformly mix the above sources; placing a pretreated substrate NF in a solution obtained in the previous step, and carrying out constant-voltage electro-deposition of deposition negative potential for 600-1200 s by using a three-electrode system; and washing a prepared material, and carrying out vacuum drying at 60-80 DEG C for 2-4 hours to obtain the product. The prepared low-crystallinity zirconium-doped ferrocobalt layered double hydroxide is applied as an anode and a cathode of water electrolysis to hydrogen production through water electrolysis. The preparation method disclosed by the invention is simple and easy to operate, wide in raw material source, low in price, mild in reaction and friendly to environment. The prepared catalyst has high bifunctional electrocatalytic activity, can be applied to a full-electrolysis water electrocatalyst of seawater, and can also be used for desalting seawater.

The invention discloses a preparation method and application of a composite cathode integrating efficient in-situ electrosynthesis of hydrogen peroxide and catalytic performance, and relates to the technical field of preparation of electrode materials. The method comprises steps: soaking carbon nanotubes in a cobalt chloride solution and then complexing with potassium ferricyanide to form ferrocobalt prussian blue analogue loaded carbon nanotubes; preparing ferrocobalt alloy carbon nano tubes through nitrogen calcination, loading the ferrocobalt alloy carbon nano tubes on a foamed nickel metalelectrode of the carbon nano tube by adopting a dispensing process, preparing the composite cathode integrating in-situ electrosynthesis of hydrogen peroxide and catalytic performance, and successfully applying the composite cathode to a heterogeneous electro-Fenton system to degrade organic pollutants.

The invention discloses a high-strength 1J22 strip and a manufacturing method thereof and belongs to the field of alloy material machining and processing. According to the high-strength 1J22 strip, Nband Cr are added to original components, mechanical properties of the 1J22 strip are promoted significantly with a special processing technology, thus the high-strength 1J22 alloy can meet the requirements that coercive force Hc is smaller than or equal to 110 A/m, tensile strength Rm is larger than 590 MPa, and the yield strength ReL is larger than 360 MPa. The manufacturing method of the 1J22 strip relates to fast cooling, brine ice quenching and other technical points, and the technical problems that after heat treatment is conducted on an existing ferrocobalt 1J22 strip, the material is high in magnetic performance, but mechanical property strength is poor, and product life is short are solved.

The invention relates to the technical field of furnace tube defect detection, in particular to a method for detecting defects of a furnace tube based on a magnetostrictive ultrasonic guided wave detection technology. The method comprises the following steps: forming T-mode guide waves on a furnace tube to be detected by a magnetic field applying device in an MsS ultrasonic guided wave system, wherein the magnetic field applying device comprises a thin ferromagnetic ferrocobalt belt and a magnetizing device; transmitting a current pulse with a fixed frequency in the furnace tube by an adapter of the MsS ultrasonic guided wave system; collecting an echo signal returned on the furnace tube by an echo signal collecting device of the MsS ultrasonic guided wave system; receiving the echo signal by a host computer of the MsS ultrasonic guided wave system, and generating a furnace tube defect detection chart; determining the defects of the furnace tube according to the furnace tube defect detection chart, wherein the determined defects comprise crack defects and corrosion defects. The state of the whole furnace tube can be observed by utilizing the method, and quick detection and positioning for the defects of the furnace tube are realized, so that the technical problem that the defects of the furnace tube cannot be effectively defected in the prior art is solved.

The invention belongs to the technical field of functional material preparation and electrocatalysis, and provides a double-layer composite water electrolysis anode catalyst and a preparation method thereof. The catalyst is a double-layer composite catalyst, wherein an inner-layer catalyst is a cobalt-based catalyst generated after high-temperature carbonization of ferrocobalt Prussian blue, an outer-layer catalyst is a nickel-based catalyst, and a mesoporous fibrous silicon dioxide and mesoporous mulberry-shaped carbon shell layer with high specific surface area is arranged between the inner-layer catalyst and the outer-layer catalyst. The surface area of the carbon layer reaches 285-325 m<2>/g, so that sufficient dispersion and stable existence of the internal and external catalysts arefacilitated. The preparation method comprises the following steps: preparing the mesoporous silica shell layer by adopting a double-liquid-phase method, preparing a mulberry-shaped carbon layer precursor by adopting a water-phase synthesis method, carbonizing at high temperature in an inert atmosphere, and loading a nickel-based catalyst. The catalyst prepared in the method has the advantages of large hollow volume, high specific surface area, unique double-layer catalyst structure, high-efficiency water electrolysis catalytic activity and good catalytic stability.

The invention provides a magnetic cobalt iron ferrite prepared by a hard template method and a method for preparing the same. The adopted preparation method comprises the following steps: paper fibre or porous organism is used as a hard template; Co<2+>Fe<2+>Fe<3+>-LDH is synthesized in the surface and holes of the hard template and roasted to prepare the magnetic cobalt iron ferrite; as the function for fixing the houghite position is produced by the obstruction and adsorption of the hard template, the occurrence of the sintering phenomenon is greatly avoided, thereby preparing the magnetic cobalt iron ferrite with a consistent shape and even granularity. The method can be used to prepare the tubular or granular magnetic cobalt iron ferrite; the saturated magnetization intensity is 69-72Delta/emu.g<-1>, wherein the tubular magnetic cobalt iron ferrite has the tube diameter of between 0.3 and 1.0 micron, the tube length of between 0.8 and 1.5 micron and even distribution; and the granular magnetic cobalt iron ferrite has the grain diameter of between 50 and 80 nanometers and even distribution. The provided preparation method has the characteristics of simple operation, simple process, low requirement to equipment, high safety, etc.

The invention discloses a preparation method of a nanosheet self-assembly ferrocobalt hydroxide. The preparation method is characterized by comprising the following steps: (S1) Co2+, Fe3+ and NO3- are used as solute ions for preparing electric deposition solution; (S2) foam nickel is used as a cathode; and graphite sheets are used as anodes to respectively dip in the electric deposition solution to obtain an electric deposition product; (S3) the electric deposition product prepared in the step (S2) is cleaned; and (S4) a sample prepared in the step (S3) is dried. The invention further discloses the nanosheet self-assembly ferrocobalt hydroxide prepared by the preparation method. The preparation method has such characteristics as simplicity, high efficiency, low cost and low environmental pollution, and facilitates large-scale technological production. The prepared nanosheet self-assembly ferrocobalt hydroxide greatly improves the nanosheet structure stability, meanwhile, prominently increases the activity specific surface area when serving as an electrode material, and accelerates the conveying speed of ions in the electrode materials.

The present invention discloses a preparation method of self-supporting nanometer flake CoFeB supercapacitor electrode materials. Ferric nitrate, cobalt nitrate and sodium borohydride are main raw materials, and supercapacitor electrode materials are prepared through adoption of a chemical reduction method. The preparation method mainly comprises the steps of: performing acid treating of nickel foam, preparing nanometer flake ferrocobalt boride, and finally, testing the supercapacitor performances of the nanometer flake ferrocobalt boride materials. The three-electrode test of the supercapacitor performances of the nanometer flake ferrocobalt boride materials is performed in 6M KOH aqueous solution, wherein a platinum net and an Ag/AgCl electrode are respectively taken as a counter electrode and a reference electrode. The method performs acid treating of nickel foam and directly grows the ferrocobalt boride at the surface of the nickel foam to reduce the tedious coating process, takesthe nickel foam matrix as a conductive collective to be easier for electron transmission so as to improve the conductivity, and the obtained ferrocobalt boride is an extra-thin nanometer flake structure to facilitate contact of the active materials and the electrolyte so as to improve the electrochemical performance and have a wide application prospect.