1176 results about "Manganese salt" patented technology

The invention discloses a sulfur-manganese composite autotrophic denitrification filler as well as a preparation method and application thereof, and belongs to the technical field of environmental functional materials and polluted water treatment. The sulfur-manganese composite autotrophic denitrification filler contains manganese salt, a sulfur-based component and a cement-based component, the manganese salt comprises one or more of manganese carbonate, calcium manganese ore and rhodochrosite; the sulfur-based component comprises sulfur and sulfur manganese ore; the cement-based component comprises cement, fly ash pottery sand, silica fume, blast furnace slag and metakaolin; the cement comprises one or more of Portland cement, iron aluminate cement and sulphoaluminate cement. The nitrogen removal efficiency of the sulfur-manganese composite autotrophic denitrification filler is superior to that of a sulfur autotrophic denitrification system, the sulfate concentration and nitrite nitrogen accumulation in effluent are remarkably reduced, the service life of the filler is prolonged, and the efficient utilization rate of the material is improved.

The invention discloses a CoFeCuMn LDH nanosheet, a confinement catalytic membrane and a preparation method of the CoFeCuMn LDH nanosheet. The preparation method of the CoFeCuMn LDH nanosheet comprises the steps that A1, cobalt salt, ferric salt, copper salt and manganese salt are dissolved in pure water according to a preset proportion to prepare a first solution, sodium hydroxide is dissolved in pure water to prepare a second solution, and sodium carbonate is dissolved in pure water to prepare a third solution; a2, adding the first solution and the second solution into the third solution, and stirring to obtain a mixed solution; a3, carrying out hydrothermal reaction on the mixed solution; a4, centrifugally washing the product obtained in the step A3 to obtain a precipitate; and A5, the sediment is dried, and the CoFeCuMn LDH nanosheet is obtained. According to the CoFeCuMn LDH nanosheet, the confinement catalytic membrane and the preparation methods of the CoFeCuMn LDH nanosheet and the confinement catalytic membrane, the degradation efficiency and the degradation rate of new pollutants are remarkably improved.

The invention belongs to the technical field of volatile organic compound treatment, and relates to a VOCs catalyst, in particular to a nitric acid modified red mud-based VOCs catalyst as well as a preparation method and application thereof. The method comprises the following steps: carrying out modification treatment on Bayer process red mud by using 2.5-3.5 mol / L nitric acid, uniformly mixing the modified red mud and manganese salt in a solution to obtain a modified red mud and manganese composite precursor, and calcining the precursor at 500-600 DEG C to obtain the red mud-manganese composite material. According to the invention, the Bayer process red mud is modified by nitric acid, and the modified red mud is used as a carrier to load the transition metal Mn, so that the catalytic efficiency on toluene is obviously improved, and the catalytic treatment on VOCs is expected to be realized.

The invention discloses a zinc negative electrode protective layer material of an aqueous zinc ion battery as well as a preparation method and application of the zinc negative electrode protective layer material. The method comprises the following steps: dispersing a carbon material in an acidic liquid, stirring at room temperature, and fully mixing to obtain a uniform suspension; adding manganese salt into the mixed solution, stirring at room temperature, and then performing constant-temperature water bath; washing, centrifuging, drying and calcining a product obtained by the reaction to obtain expanded graphite; uniformly dispersing expanded graphite in a solvent, and stirring to obtain a dispersion liquid; adding a titanium-containing organic compound into the dispersion liquid and stirring; adding deionized water into the dispersion liquid and refluxing; and centrifuging, washing, drying and calcining to obtain the protective layer. According to the composite material, expanded graphite is prepared firstly, and then titanium dioxide quantum dots are anchored on the expanded graphite. Due to excellent zinc ion rate, compared with the prior art, the material has lower interface resistance and good cycling stability and rate capability, and the problems of interface dendritic crystal growth and the like are solved.

The present invention relates to a new method for preparing a ferromanganese oxalate precursor. The method comprises the following steps: mixing a water-soluble manganese salt, a water-soluble iron salt, a doping auxiliary agent 1 and a water-soluble oxalate in a water-organic solvent system, and subjecting same to a coprecipitation reaction. The present invention further relates to a method for preparing a lithium iron manganese phosphate positive electrode material. The method comprises the following steps: mixing the ferromanganese oxalate precursor with a lithium source, a phosphorus source and a doping auxiliary agent 2, drying same, then subjecting same to low-temperature roasting to obtain a lithium iron manganese phosphate precursor, mixing the precursor with an organic carbon source, then drying the mixture, and subjecting the mixture to high-temperature sintering, so as to obtain a carbon-coated lithium iron manganese phosphate positive electrode material. The present invention further relates to the ferromanganese oxalate precursor and the lithium iron manganese phosphate positive electrode material prepared by these methods.

The invention provides a preparation method of a lithium manganese iron phosphate composite material containing an MXene coating layer, and the method comprises the following steps: uniformly dispersing manganese salt, ferric salt, phosphorus salt and lithium salt solutions and an antioxidant in a dispersing agent respectively, and mixing to obtain a mixed solution; carrying out ultrasonic treatment on the mixed solution in a protective atmosphere to obtain a lithium manganese iron phosphate dispersion liquid; carrying out solid-liquid separation on the lithium manganese iron phosphate dispersion liquid, washing with water, and drying in a drying oven at a set temperature; calcining the lithium manganese iron phosphate solid, and cooling to room temperature to obtain a lithium manganese iron phosphate body material; the preparation method comprises the following steps: preparing a dispersion liquid from a lithium manganese iron phosphate body material, uniformly mixing the dispersion liquid with an MXene dispersion liquid, coating the outer surface of the lithium manganese iron phosphate body material with MXene under ultrasonic waves, and then filtering and freeze-drying to obtain the lithium manganese iron phosphate composite material. According to the lithium manganese iron phosphate composite material prepared by the invention, the conductivity of the material is effectively improved, and meanwhile, dissolution of manganese ions in the material can also be inhibited.

A green method for producing a nickel-cobalt-manganese new energy raw material from laterite nickel ore based on hydrometallurgy, mainly comprising ore blending, ore washing, ore separation, pressurization leaching or oxygen pressure leaching, cyclic leaching and neutralization, counter-current washing, multi-segment removal of iron chromium aluminum, multi-segment synthesis of nickel-cobalt-manganese hydroxide, ion extraction, preparation of a nickel-cobalt-manganese mixed salt solution, preparation of a separate nickel-cobalt-manganese salt solution, preparation of a nickel-cobalt-manganese mixed salt crystal, preparation of a separate nickel-cobalt-manganese salt crystal, preparation of a ternary precursor, comprehensive treatment of wastewater, waste gas, and waste residue, and other techniques and processes. Efficient simultaneous extraction of nickel-cobalt-manganese is achieved; ferrochrome, copper, zinc, scandium and other valuable metal elements are effectively recovered; a nickel-cobalt-manganese raw material meeting the requirement of a high-nickel ternary battery is produced; and a ternary precursor material directly used for manufacturing of the ternary battery is manufactured.

The invention belongs to a new energy material preparation technology, and particularly relates to a preparation method of high-tap-density chemical manganese dioxide and application of the high-tap-density chemical manganese dioxide in a lithium ion battery. The chemical manganese dioxide is obtained by carrying out one-step reaction on divalent manganese salt and an oxidizing agent at proper temperature and pH, the obtained chemical manganese dioxide is in a gamma crystal form, the tap density is greater than 2.38 g / cm < 3 >, the morphology is spheroidic, the purity is greater than 97%, and the impurity content reaches the industrial standard. Compared with a preparation method in the prior art, the preparation method is simple, low in cost and suitable for large-scale production, and the obtained manganese dioxide is high in tap density, good in crystallinity and excellent in electrochemical performance.

The invention discloses a high-specific-surface-area low-sodium-sulfur ternary precursor as well as a preparation method and application thereof. The preparation method comprises the following steps: adding a nickel-cobalt-manganese salt solution, a precipitant and a complexing agent into a first reaction kettle, and carrying out a co-precipitation reaction in an inert atmosphere to obtain a crystal nucleus with the particle size D50 of 1.0-1.6 [mu] m; and adding the crystal nucleus, a nickel-cobalt-manganese salt solution, a precipitator and a complexing agent into a second reaction kettle, carrying out a coprecipitation reaction in an inert atmosphere, then carrying out a coprecipitation reaction in an oxidizing atmosphere, and stopping the reaction when the product granularity D50 is 3.8-4.2 microns to obtain the high-specific-surface-area low-sodium-sulfur ternary precursor. The ternary precursor prepared by the method is narrow in particle size distribution and good in sphericity, primary particles are flaky and grow in the radial direction, secondary particles are porous, the product batch stability is high, and production operation is convenient.

The invention discloses a selective separation and resource utilization method of chromium in a sodium vanadium solution, which comprises the following steps: S1, measuring a predetermined volume of sodium vanadium solution, and heating to a predetermined temperature; s2, a preset amount of divalent manganese salt is added into the sodium vanadium solution, so that hexavalent chromium is subjected to a reduction reaction; s3, after the reaction is finished, carrying out solid-liquid separation and washing to obtain chromium and vanadium removed liquid and precipitates; s4, vanadium precipitation and calcination are conducted on the chromium and vanadium removal liquid, and a vanadium oxide product is obtained; and calcining the precipitate at high temperature to obtain the chromium-manganese oxide. According to the method, the sodium vanadium solution is used as a raw material, the divalent manganese salt is used as a reducing agent, hexavalent chromium is reduced into trivalent chromium, the trivalent chromium generates chromium hydroxide precipitate under the alkaline condition, vanadium is not reduced and is reserved in the solution, and efficient separation of vanadium and chromium is achieved; the dechromed vanadium liquid is subjected to vanadium precipitation and calcination, and a vanadium oxide product is obtained; after the precipitate is subjected to high-temperature calcination, chromium-manganese oxide is obtained and can be used for preparing chromium-manganese alloy, and resource utilization is achieved.

The invention discloses a preparation method and application of a manganese-based amino acid coordination polymer, and belongs to the technical field of nano-enzymes and nano-drugs. Divalent manganese salt, histidine and other amino acids are subjected to a co-precipitation reaction to prepare the manganese-based amino acid coordination polymer, and the polymer is of a nanoparticle structure, small in size and high in stability, has enzyme-like activity, catalyzes hydrogen peroxide to generate high-toxicity hydroxyl free radicals and is used for specifically killing tumor cells. The catalyst has the capability of catalytically generating singlet oxygen in the presence of hydrogen peroxide. Meanwhile, the manganese-based amino acid complex has glutathione oxidase-like activity, consumes glutathione to overcome the resistance of tumors to oxidative stress, improves the chemical kinetic curative effect, and has anti-tumor application potential.

The invention belongs to the technical field of supercapacitor electrode materials, and discloses a NiCoMoMnM-LDH high-entropy material and preparation and application thereof.The preparation method comprises the steps that a nickel salt, a cobalt salt, a manganese salt, an M salt and an ethanol water solution form a solution A; forming a solution B from molybdate, 2, 5-dihydroxy terephthalic acid and an organic solvent; mixing the solution A and the solution B, and performing hydrothermal reaction to obtain a precursor; dispersing the precursor in a sodium hydroxide solution, stirring, carrying out solid-liquid separation, washing, and drying to obtain a NiCoMoMnM-LDH high-entropy material; m salt is any one of zinc salt, ferric salt and copper salt. The preparation method disclosed by the invention not only avoids phase separation and element aggregation in the forming process of the high-entropy material, but also is high in universality, and the high-entropy hydroxide can be efficiently synthesized on a large scale; and the prepared high-entropy material is high in specific capacitance and good in rate capability and cycling stability, and can be applied to a positive electrode material of a supercapacitor.

The invention provides a method for preparing battery-grade lithium iron manganese phosphate from lithium iron phosphate lithium extraction slag and application of the battery-grade lithium iron manganese phosphate. The preparation method comprises the following steps: carrying out acid leaching on the ferrophosphorus slag to obtain a leaching solution and leaching slag; adding a manganese salt and an iron salt into the leachate to supplement manganese and iron, and then mixing with a precipitant solution and a complexing agent solution to carry out coprecipitation reaction to obtain a ferromanganese phosphate precursor; carrying out hydrothermal reaction on the ferromanganese phosphate precursor and a lithium source to obtain a lithium ferromanganese phosphate precursor; and sintering the lithium manganese iron phosphate precursor to obtain the battery grade lithium manganese iron phosphate, wherein acid adopted in the acid leaching process comprises phosphoric acid. According to the preparation method provided by the invention, the recovery rate of phosphorus and iron in the waste residues can reach 96% or above, the obtained lithium manganese iron phosphate material is high in purity, small in particle size and uniform in distribution, and the electrical property can reach the level of battery-grade lithium manganese iron phosphate; in addition, the preparation method is short in technological process, high in production efficiency and suitable for large-scale production.

The invention relates to a preparation method of a cobalt-free single crystal lithium-rich positive electrode material. The preparation method comprises the following steps: preparing a nickel-manganese oxygen-containing compound precursor from manganese salt and nickel salt by using a solid-phase method or a coprecipitation method; mixing the prepared nickel-manganese oxygen-containing compound precursor with a low-melting-point lithium source, pre-sintering and melting the mixture, performing high-energy ball milling, adding a conventional lithium source once or multiple times during ball milling, and calcining the mixture after ball milling to obtain an initial product of the cobalt-free single crystal lithium-rich positive electrode material; and carrying out acid treatment and secondary calcination on the initial product to obtain the cobalt-free single crystal lithium-rich positive electrode material product. The single crystal lithium-rich material with excellent performance can be prepared with high efficiency and low cost, and has excellent electrochemical performance.

The invention discloses an electrolyte for an aqueous manganese-based battery. The electrolyte comprises an electrolyte, and the electrolyte comprises a manganese salt; the weak acid is used for regulating and controlling proton dynamic release of the positive electrode / electrolyte interface to realize on-demand supply of protons of the positive electrode / electrolyte interface; and a solvent, wherein the solvent is deionized water; the PH range of the electrolyte is 2.0-3.5, and the electrolyte can realize on-demand supply of protons of a positive electrode / electrolyte interface in the charging and discharging process of the aqueous manganese-based battery, and promotes efficient and reversible deposition and dissolution reaction of a positive active substance manganese dioxide. According to the invention, the proton on-demand supply electrolyte is constructed by utilizing dynamic dissociation equilibrium of weak acid, so that on-demand supply of protons in the MnO2 dissolving process is realized, complete electrochemical dissolution of MnO2 is promoted, and generation of'dead manganese 'is inhibited, so that the cycling stability of the battery and the utilization efficiency of active substances are remarkably improved. The invention also discloses an aqueous manganese-based battery for realizing on-demand supply of protons and application of the aqueous manganese-based battery in the field of secondary energy storage.

The invention discloses a method for recovering all components of a waste lithium battery. The method comprises the following steps: finely disassembling the waste lithium battery to obtain a positive plate, a negative plate, a shell and a diaphragm; respectively carrying out electrochemical powder removal on the positive and negative plates by using pulse current to obtain an aluminum foil, positive powder and an electrolytic mother solution I after the powder removal of the positive plate, and obtaining a copper foil, negative powder and an electrolytic mother solution II after the powder removal of the negative plate; lower-layer inorganic components of the electrolytic mother liquor I and the electrolytic mother liquor II are used as electrolytes and are respectively returned to the positive plate and the negative plate for electrochemical powder removal, and upper-layer organic components can be used as organic fluorine raw materials; preferentially extracting lithium from the positive electrode powder to obtain a lithium salt, and extracting nickel, cobalt and manganese to obtain a nickel salt, a cobalt salt and a manganese salt; and purifying and repairing the negative electrode powder to obtain lithium salt and graphite carbon powder. According to the invention, high-efficiency fine separation and recovery of each component of the waste lithium battery can be realized, the recovery rate and purity of positive electrode powder, negative electrode powder, copper foil, aluminum foil and the like are relatively high, and diaphragms and fluorine resources can be completely recovered.

The invention discloses a manganese hydrogen phosphate precursor, lithium iron manganese phosphate, a preparation method of the manganese hydrogen phosphate precursor, a positive pole piece containing the lithium iron manganese phosphate, a battery containing the lithium iron manganese phosphate, and an electric device containing the lithium iron manganese phosphate. The preparation method comprises the following steps: firstly, carrying out primary precipitation reaction on soluble manganese salt and a precipitator to prepare manganese hydroxide, and then carrying out secondary precipitation reaction on the manganese hydroxide and phosphoric acid to prepare the manganese hydrogen phosphate precursor. The manganese hydrogen phosphate precursor with low impurity ion content and high yield is prepared through secondary precipitation reaction.

A lithium manganese iron phosphate substrate, cathode material, and their preparation method, as well as a lithium battery, belonging to the field of lithium-ion battery technology. The preparation of the lithium manganese iron phosphate substrate comprises the following steps: dissolving soluble ferrous salt, soluble manganese salt, phosphoric acid, and lithium hydroxide in deionized water to react, obtaining Material A; filtering Material A, taking the filter cake and drying it to obtain Material B; Heat treating Material B in an inert gas atmosphere to obtain the lithium manganese iron phosphate substrate. By coating the surface of the carbon-free nano lithium manganese iron phosphate substrate with metal oxides or metal salts and carbon, the coating layer formed on the surface of the composite lithium manganese iron phosphate material effectively prevents the reaction between the lithium battery and the electrolyte.

The invention relates to the technical field of lithium ion batteries, in particular to a modified cobalt-free lithium-rich manganese-based positive electrode material doped with anions and cations and a preparation method of the modified cobalt-free lithium-rich manganese-based positive electrode material. According to the method, a modified lithium-rich manganese-based precursor is prepared from a metal salt solution, a precipitator, a fluorine source and a complexing agent, and the anion-cation co-doped cobalt-free lithium-rich manganese-based positive electrode material is prepared from the modified lithium-rich manganese-based precursor and a lithium source. The metal salt solution contains manganese salt, nickel salt and aluminum salt. According to the method, by doping Al and F, the voltage attenuation is effectively reduced, the long cycle performance of the material is improved, the rate capability of the material is improved, and in addition, mixed arrangement of lithium and nickel cations is effectively inhibited, so that the cycle stability is improved.

The invention provides a nanometer casting and doping double-strategy improved lanthanum manganese perovskite catalyst, a preparation method thereof and application of the nanometer casting and doping double-strategy improved lanthanum manganese perovskite catalyst in degradation of halogenated organic pollutants. The preparation method of the nanometer casting and doping double-strategy improved lanthanum manganese perovskite catalyst comprises the following steps: taking transition metal salt as a doping agent, and mixing transition metal salt, lanthanum salt, manganese salt and a complexing agent in a solvent to form a mixed solution; then adding nano silicon dioxide, stirring and heating to a gel state, and drying to obtain a solid precursor; calcining the solid precursor to obtain a calcined product which comprises nano silicon dioxide and transition metal doped lanthanum manganese perovskite; and adding the calcined product into an alkaline solution, and etching to remove the nano silicon dioxide to form a nano pore channel structure so as to prepare the nano casting and doping double-strategy improved lanthanum manganese perovskite catalyst. The nano casting and doping double strategies have a synergistic improvement effect on lanthanum manganese perovskite, and the catalytic performance of the obtained catalyst is remarkably superior to that of a single-strategy improved catalyst.

The invention relates to the technical field of preparation of manganous-manganic oxide, in particular to a production and preparation process of a manganous-manganic oxide material for batteries, which comprises the following steps: dissolving high-purity manganese sulfate to prepare a manganese sulfate solution, and adding a dispersing agent and a surfactant to obtain a manganese salt solution; the method comprises the following steps: adding a base solution into a reaction kettle, stirring and heating, conveying a manganese salt solution and ammonia water, synchronously introducing oxygen, dividing the whole oxidation reaction process into two stages, controlling the flow velocity of the ammonia water in different stages, and dynamically adjusting the temperature; and carrying out suspension precipitation on manganous-manganic oxide obtained by the oxidation reaction, aging, and carrying out dehydration suction filtration, washing and drying to obtain the manganous-manganic oxide material for the battery. The invention aims to adjust the morphology of the manganous-manganic oxide finished product by controlling reaction conditions, effectively reduce the granularity of the product and enhance the uniformity of particle size distribution.

The invention discloses a boron manganese tannate nanoparticle as well as a synthesis method and application thereof. The synthesis method of the tannic acid boron manganese nanoparticles comprises the following steps: sequentially dropwise adding a bivalent manganese salt solution, a boric acid solution, a polyethylene glycol solution and a bovine serum albumin solution into pure water under water bath ultrasonic or magnetic stirring to obtain an assembly stock solution, and adding a tannic acid solution into the assembly stock solution to initiate assembly; and continuously carrying out water-bath ultrasonic treatment or magnetic stirring for a period of time, and then carrying out ultrafiltration to remove free drug molecules, so as to obtain the boron manganese tannate nanoparticles capable of mediating boron neutron capture therapy and magnetic resonance imaging. The boron manganese tannate nanoparticles can improve the boron intake in tumors and prolong the retention time of boron atoms in the tumors in boron neutron capture therapy, drug distribution is monitored through the nuclear magnetic resonance imaging technology, then the treatment effect of the boron neutron capture therapy is improved, the preparation method is simple, the stability is good, the size is uniform, the boron loading amount is high, and the application prospect is wide. The biological safety is good, and the repeatability is high.

The invention discloses a lithium-manganese-rich positive electrode material as well as a surface modification method and application thereof, and belongs to the technical field of preparation of battery positive electrode materials. The preparation method comprises the following specific processes: (1) stirring, dispersing and dissolving nickel salt, cobalt salt and manganese salt, and then adding a precipitator and a complexing agent to prepare a lithium-rich manganese-based precursor; (2) mixing the lithium-rich manganese-based precursor, a lithium source and fused salt, and calcining to obtain a single-crystal lithium-rich manganese-based oxide material; (3) stirring and reacting the single crystal lithium-rich manganese-based oxide material and a surface modifier through a wet chemical method to prepare coated precursor powder; and (4) grinding and calcining the coated precursor powder prepared in the step (3) to prepare the surface-modified lithium-manganese-rich positive electrode material. The preparation method provided by the invention is low in raw material cost, the in-situ surface modification adopts the combination of a wet chemical method and heat treatment, the operation is simple, the production environment requirement is low, the first coulombic efficiency and the cycling stability of the lithium-rich manganese-based positive electrode material are effectively improved, and the preparation method is suitable for large-scale batch production.

The invention discloses a nitrogen-doped zinc ion battery manganese-based positive electrode material and a preparation method and application thereof, and the preparation method comprises the following steps: mixing a strong oxidant and a manganese salt, putting the mixture into a beaker, adding deionized water, and uniformly stirring to form a mixed solution; transferring the mixed solution into a high-pressure reaction kettle with a polytetrafluoroethylene lining, and heating the high-pressure reaction kettle in a drying oven; cooling, precipitating, filtering and washing for multiple times, and then putting into a drying oven for vacuum drying to obtain an original manganese-based positive electrode material; the preparation method comprises the following steps: respectively weighing an original manganese-based positive electrode material and hexamethylenetetramine, flatly laying the original manganese-based positive electrode material at the bottom of a lining of a reaction kettle, and putting the hexamethylenetetramine into a beaker; and putting the beaker into a reaction kettle, moving the beaker and the reaction kettle into a drying oven, and heating to obtain the surface nitrogen-doped manganese-based positive electrode material.

The invention provides a lithium ferric manganese phosphate precursor and a preparation method thereof, and lithium ferric manganese phosphate and a preparation method thereof, and relates to the technical field of lithium ion battery positive electrode materials. A preparation method of a lithium ferric manganese phosphate precursor comprises the following steps: (1) respectively providing ferric salt, phosphorus salt and manganese salt, dissolving the ferric salt, the phosphorus salt and the manganese salt in pure water, uniformly stirring at normal temperature, adding organic fuel, and uniformly stirring to obtain a precursor solution; (2) sintering the precursor solution under the ultrasonic action to obtain a lithium ferric manganese phosphate precursor; the sintering temperature ranges from 350 DEG C to 750 DEG C, the sintering time ranges from 0.5 h to 2 h, and the ultrasonic power ranges from 1000 W to 2000 W. The synthesized lithium ferric manganese phosphate precursor has a fine and uniform three-dimensional pore structure, and the compaction density of the lithium ferric manganese phosphate positive electrode material and the capacity of the battery are improved.

The invention discloses an amorphous NiCoMox Mny heterojunction electrode material doped with crystalline Ag and a preparation method of the amorphous NiCoMox Mny heterojunction electrode material, the amorphous NiCoMox Mny heterojunction electrode material is composed of amorphous NiCoMox Mny and crystalline Ag, the crystalline Ag is doped in the amorphous NiCoMox Mny, in the amorphous NiCoMox Mny, x is larger than 0 and smaller than or equal to 1, y is larger than or equal to 0 and smaller than 1, and x + y is equal to 1. A one-step hydrothermal method is adopted for preparation, foamed nickel and a mixed solution in which cobalt salt, ammonium molybdate (or / and manganese salt) and silver salt are dissolved are evenly mixed, the foamed nickel serves as a Ni source and serves as an oxidizing agent for replacement to obtain crystalline Ag, the crystalline Ag is further doped into amorphous NiCoMox Mny to form the heterojunction electrode material, the method is simple, operation is controllable, the yield is high, and the method is suitable for industrial production. The repeated effect is good, and large-scale production is easy to realize.

The invention discloses a high-entropy metal oxide catalyst as well as a preparation method and application thereof in CO catalytic oxidation, and belongs to the technical field of flue gas treatment. The preparation method comprises the following steps: dissolving copper salt, manganese salt, cerium salt, cobalt salt, vanadium salt and a dispersing agent into water to form a uniform solution, and slowly adding excessive alkali precipitant into the uniform solution to form a solid-liquid mixture; the solid-liquid mixture is transferred into a high-pressure kettle to be subjected to a hydrothermal reaction and then quenched, an obtained hydrothermal reaction product is calcined, and the high-entropy metal oxide catalyst is obtained and is high in catalytic oxidation activity on carbon monoxide at the low temperature, excellent in water resistance and sulfur resistance and particularly suitable for treatment of complex flue gas.

The invention discloses a preparation method of a sodium ferromanganese vanadium phosphate material of a sodium battery positive electrode. The preparation method comprises the following steps: S1, preparing a hydrophosphate solution and a manganous salt solution; and S2, adding the hydrophosphate solution into the manganous salt solution, and reacting to obtain the manganous hydrogen phosphate crystal nucleus slurry. And S3, filtering and washing the manganese hydrogen phosphate crystal nucleus slurry, adding water into the manganese hydrogen phosphate material to prepare slurry, heating to 85-95 DEG C, respectively adding a ferrous source and a phosphorus salt solution, and reacting to obtain the manganese iron hydrogen phosphate slurry. And S4, filtering, washing and drying the iron manganese hydrogen phosphate slurry, adding water into the dried slurry to prepare slurry, adding phosphoric acid, heating to 90-100 DEG C, reacting to obtain an iron manganese phosphate compound precipitate, and filtering, washing and drying the precipitate to obtain an iron manganese phosphate material. The sodium manganese iron vanadium phosphate product is prepared by adopting a coprecipitation method and high-temperature sintering, and the method has the advantages of short process flow, simple process, only one-time sintering, low energy consumption and the like.

The invention provides a Mn-based metal organic framework derived Mn2O3 / Mn3O4 heterojunction material as well as a preparation method and application thereof, and belongs to the field of nano material preparation methods and electro-catalysis cross application. The preparation method comprises the following steps: S10, reacting manganese salt, a surfactant and a benzoic acid compound in a solvent to obtain a Mn-based metal organic framework material; s20, calcining the Mn-based metal organic framework material in an inert atmosphere to obtain a carbonized product; and S30, flattening the carbonized product, and calcining the flattened carbonized product in an air atmosphere to obtain the Mn-based metal organic framework derived Mn2O3 / Mn3O4 heterojunction material. The method can be applied to renewable energy sources, is simple in process, universal in preparation condition, high in yield, green and environment-friendly, stable in product morphology and excellent in catalytic activity, shows excellent activity and electrochemical performance in catalysis of lithium polysulfide conversion of a cathode of a lithium-sulfur battery, and is also suitable for medium-scale industrial production.

The invention discloses a Prussian blue analogue electrode and a preparation method and application thereof.The preparation method comprises the following steps that a manganese salt solution, a nickel salt solution and a potassium ferricyanide solution are prepared and added into water at the same time, a mixture with the molar ratio of manganese to nickel being larger than or equal to 0.1: 1 is obtained, aging, washing and drying are conducted, and the Prussian blue analogue electrode is obtained. And mixing the manganese-doped Prussian blue analogue with a binder, a conductive agent and a solvent, carrying out ultrasonic treatment to obtain an electrode slurry liquid, covering the surface of a current collector with the electrode slurry liquid, and drying to obtain the Prussian blue analogue electrode. The Prussian blue analogue electrode prepared by the method has the advantages of low energy consumption, high salt adsorption capacity, high salt adsorption rate and the like, can be used for desalting treatment as a capacitive deionization cathode, has the salt adsorption rate and the salt adsorption capacity which are more than two times of those of a conventional electrode, and is high in use value, good in application prospect and wide in application prospect. The method is of great significance in promoting wide application of the capacitive deionization technology.