158 results about "Manganese doping" patented technology

The invention relates to a preparation method and application of a manganese ion doped modified ferric sodium pyrophosphate positive electrode material, and belongs to the technical field of sodium ion battery positive electrodes. The preparation method comprises the following steps: adding a sodium source, a phosphorus source and a carbon source into ethanol, uniformly mixing to form a mixed solution, sequentially adding an iron source and a manganese source into the mixed solution, uniformly mixing to form slurry, and drying the slurry to obtain precursor powder; calcining in a protective atmosphere to obtain a manganese-doped carbon-coated ferric pyrophosphate sodium material; the calcining conditions are as follows: heating to the temperature of 300-350 DEG C at the heating rate of 2-3 DEG C / min, carrying out first-stage constant-temperature calcination for 2-3 hours, heating to the temperature of 500-550 DEG C at the heating rate of 5-8 DEG C / min, and carrying out second-stage constant-temperature calcination for 10-12 hours. By doping the manganese ions, the electronic conductivity and the ion diffusivity of the ferric sodium phosphate pyrophosphate composite material are improved, so that the discharge capacity of the ferric sodium phosphate pyrophosphate composite material at high rate is improved, and the battery has relatively high cycle stability.

The invention discloses a method for preparing a fluorescent material based on a waste NCM ternary lithium battery and application of the fluorescent material, and the preparation method of the fluorescent material comprises the following steps: disassembling the waste NCM ternary lithium battery to obtain a nickel cobalt lithium manganate waste material and preparing the nickel cobalt lithium manganate waste material into powder; impurities and part of ions in the nickel cobalt lithium manganate waste powder are removed, and manganese-containing powder is prepared; and mixing manganese-containing powder, a first perovskite fluorescent raw material, a ligand, a protective material and a solvent, heating and stirring under a vacuum condition, heating under a nitrogen atmosphere, adding a second perovskite fluorescent raw material solution into the system for reaction, and cooling after the reaction is finished to obtain the manganese-doped perovskite fluorescent material. According to the method, the efficient recycling of the waste NCM ternary lithium battery is realized, the preparation cost of the fluorescent material is reduced, the resource recycling rate is improved, the environmental pollution is reduced, and the manganese-doped perovskite fluorescent material is simple to operate when chloride ions are detected after being loaded on the carrier and can be used for field detection.

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.

The invention relates to the field of ceramic materials, provides a high-voltage-resistant PTC (Positive Temperature Coefficient) thermal sensitive ceramic material as well as a preparation method and application thereof, and aims to improve the voltage resistance and PTC effect stability of thermal sensitive ceramic. The material is composed of aluminum oxide-coated manganese-doped barium titanate nanorods, hollow-core silicon dioxide microspheres and a glass phase sintering aid, and the electric heating performance and the microstructure stability are optimized by constructing a core-shell structure and a three-dimensional composite system. A hydrothermal method and a sol-gel method are adopted to precisely control a raw material structure, and alcohol dispersion, tape casting and weak oxidizing atmosphere sintering are combined, so that the compactness and consistency of the ceramic are ensured. The material is suitable for high-voltage temperature control elements and over-current protection devices, and is widely applied to the fields of new energy automobile battery pack over-temperature protection, high-voltage power equipment current limiting elements, industrial automatic temperature control switches and the like.

Disclosed herein are manganese doped metal organic frameworks and methods of making and use thereof. For example, disclosed herein is a manganese doped metal organic framework (Mn-MOF) comprising a metal organic framework (MOF) comprising a zeolitic imidazolate framework (ZIF) comprising metal ions connected by imidazolate linkers, wherein the metal ions comprise Mn and Zn. In some examples, the Mn-MOF comprises from greater than 0% to 50% (mol%) Mn based on the total amount of metal ions. Also disclosed herein are methods of making and methods of use of the Mn-MOFs.

The invention discloses a preparation method of manganous ferric phosphate, and belongs to the technical field of battery positive electrode material manufacturing. Manganese element doping is mainly carried out in the aging stage, an oxidizing agent is not used, and the crystallization property and the iron-phosphorus ratio of the material are improved through secondary calcination. According to the invention, divalent manganese ions can be prevented from being oxidized into trivalent manganese ions when the divalent iron ions are oxidized in the synthesis stage, disproportionation and co-ion effect of the trivalent manganese ions are avoided, so that the divalent manganese ions stably exist in the product, the low-temperature discharge performance of the battery is improved, and meanwhile, the preparation cost is reduced.

The invention provides a preparation method of a carbon-coated manganese-titanium-doped sodium vanadium phosphate positive electrode material, which comprises the following steps: sequentially adding raw materials of a carbon source, a vanadium source, a phosphorus source, a sodium source, a manganese source and a titanium source into deionized water according to a molar ratio, stirring until the solution becomes clear, and carrying out high-temperature calcination through a sol-gel method and a tubular furnace to prepare a Na (4-x) MnV1-XTix (PO4) 3 / C positive electrode material. The target material is of a sea rock similar structure, the surface of the target material is provided with multiple holes, and due to the morphology, the specific surface area of the material is larger, multiple active sites are provided, and the reaction rate is increased. And the surface is coated with carbon, so that the conductivity of the material is greatly improved. Through a double-doping strategy of partially replacing transition metal vanadium sites with titanium and manganese doping, the prepared electrode material has relatively good cycle stability.

The invention discloses a preparation method of a manganese-doped iron-based sulfide / nitrogen-doped reduced graphene oxide composite electrode material for a sodium-ion battery, a simple solvothermal method is combined with annealing treatment, and iron atoms in a hexagonal system are replaced by part of manganese atoms in a hydrothermal process to form multivalent iron-based sulfide, so that the composite electrode material is prepared. The manganese-doped iron-based sulfide / nitrogen-doped reduced graphene oxide composite electrode material for the sodium-ion battery is successfully prepared by uniformly compounding the manganese-doped iron-based sulfide and the nitrogen-doped reduced graphene oxide, and the manganese-doped iron-based sulfide / nitrogen-doped reduced graphene oxide composite electrode material can effectively regulate and control the electronic state density, reduce the sodium ion migration energy barrier and promote the electron / ion transmission; meanwhile, continuous growth of iron-based sulfide particles is limited, so that the iron-based sulfide particles are uniformly dispersed on the surface of the graphene, more active sites are exposed, the electrochemical reaction activity is improved, and the structural stability is enhanced. The composite electrode material disclosed by the invention can be widely applied to a negative plate for a sodium-ion battery, and has excellent adaptability and application prospect in a wide temperature range and under a high-current working condition.

The invention provides a lithium manganese iron phosphate material and a preparation method and application thereof, and belongs to the technical field of lithium batteries, the lithium manganese iron phosphate material comprises a gradient manganese-doped core, a magnesium-doped layer, a carbon coating layer and an Al2O3 coating layer; the gradient manganese-doped inner core sequentially comprises a manganese-containing core layer, a manganese-containing transition layer and a manganese-containing shell from inside to outside, and the manganese ion concentration of the manganese-containing core layer is from high to low. According to the lithium manganese iron phosphate material disclosed by the invention, the gradient manganese-doped core is designed, so that the concentration gradient distribution of manganese ions is realized, and the electrochemical performance of the material is optimized. Meanwhile, due to the introduction of the magnesium doping layer, the cycling stability and the thermal stability of the material are further improved, and the manganese ion dissolution phenomenon in a high-temperature environment is reduced; in addition, the use of the carbon coating layer significantly improves the conductivity of the material and improves the charge and discharge performance of the material, and the Al2O3 coating layer can improve the structural stability of the material and reduce the dissolution of manganese ions, and also can improve the cycling stability and thermal stability of the material.

The invention discloses a manganese-doped Ir-Ta oxide composite coating titanium anode and a preparation method thereof. The titanium anode comprises an insoluble titanium base material, an oxide middle layer and an oxide catalyst layer which are sequentially arranged, wherein the oxide catalyst layer is composed of an iridium (Ir) oxide, a tantalum (Ta) oxide and a doped manganese (Mn) element. The preparation method comprises the following steps: carrying out sand blasting and surface treatment on a titanium substrate to increase the roughness and binding force of the surface, then carrying out proper intermediate layer coating on the surface of the substrate, and finally preparing the manganese-doped Ir-Ta oxide composite coating on the surface of the intermediate layer. Compared with a traditional titanium anode, the prepared manganese-doped Ir-Ta oxide composite coating titanium anode has the advantages of being higher in reaction specific surface area, lower in oxygen evolution potential, longer in catalytic life and the like, and meanwhile the transition metal element manganese is higher in reserve, lower in price and high in oxygen evolution activity.

A manganese-doped ruthenium dioxide nanofiber material, a preparation method thereof, and an application thereof in alkaline electrocatalytic hydrogen evolution and oxygen evolution at industrial-level current intensity belong to the technical field of controllable preparation of doped metal oxide nanomaterials. In the present invention, a manganese-doped ruthenium dioxide nanofiber material is prepared by two steps of electrospinning technology and calcination in an air atmosphere. The material exists in a uniform fiber morphology as a whole, and the surface is rough. This method is simple and efficient and can be applied to large-scale industrialization. The manganese-doped ruthenium dioxide nanofiber material prepared in the present invention, as a bifunctional electrocatalyst for electrocatalytic water splitting, exhibits excellent hydrogen evolution and oxygen evolution catalytic activities and stability at industrial-level current density, realizes the efficient and stable preparation of clean and green hydrogen energy, solves the disadvantages of low catalyst activity and poor stability in current industry, and provides an efficient solution to the increasingly serious environmental problems, having high practical application and economic value.

The invention provides a manganese-doped ferrocobalt oxide nano particle-coated carbon-nitrogen cubic composite material as well as a preparation method and application of the manganese-doped ferrocobalt oxide nano particle-coated carbon-nitrogen cubic composite material. The preparation method comprises the following steps: firstly doping ferrous sulfate and manganese chloride into ZIF-8, then mixing the ZIF-8 with cobalt nitrate and 2-methylimidazole in methanol, carrying out centrifugal separation to obtain a product, and finally carrying out one-step calcination to realize carbonitriding of the composite material, doping of manganese and generation of nano particles from ferrocobalt oxide. And finally, the manganese-doped ferrocobalt oxide nanoparticle-coated carbon-nitrogen cubic composite material is obtained. Compared with the traditional preparation method, the method disclosed by the invention is simple, mild in reaction condition and high in yield, and the prepared composite material is uniform in morphology and has excellent electro-catalytic performance on the water electrolysis oxygen evolution reaction.

The invention discloses a hydrophobic modified manganese-doped copper-based catalyst for preparing methanol through CO2 thermal reduction hydrogenation as well as a preparation method and application of the hydrophobic modified manganese-doped copper-based catalyst, and belongs to the technical field of catalysts. The preparation method of the catalyst comprises the following steps: mixing a metal salt mixed solution of a copper salt, a zinc salt, an aluminum salt and a manganese salt with an alkaline solution of a sodium salt, and controlling the pH value; heating, aging, standing and layering; washing the precipitate, drying and roasting to obtain a manganese-doped copper-based catalyst to be hydrophobically modified; the preparation method comprises the following steps: carrying out a hydrothermal reaction on divinyl benzene and a DMF solution of epoxy resin, washing and drying a white solid obtained by the reaction to obtain a hydrophobic material nano-porous polydivinyl benzene; the preparation method comprises the following steps: mixing a hydrophobic material and a manganese-doped copper-based catalyst to be hydrophobically modified, grinding, tabletting and forming to obtain the hydrophobically modified manganese-doped copper-based catalyst. The CO2 adsorption capacity of the catalyst is improved, the monatomic dispersion degree of the catalyst is promoted, and large-scale low-steric-hindrance hydrophobic modification of an active phase is realized.

The present invention discloses a self-supporting oxygen evolution electrode and its preparation method and application, which belongs to the field of alkaline water electrolysis hydrogen production; the electrode is obtained by combining a hydrothermal method and an electrodeposition method; the electrode grows manganese-doped basic cobalt carbonate nanowires vertically on the surface of nickel foam, and the nanowires are surrounded by multiple layered nickel-iron double metal hydroxide nanosheets to form a nanorod as a whole. The nanorods are uniform in size, 2 to 3 μm long, and 100 to 500 nm in diameter, growing vertically on the surface of nickel foam; the electrode has high catalytic activity and stability. After using nickel foam as a conductive substrate, it can still operate stably for a long time under a high electrolysis current and in a strong alkaline medium; the electrode is used to catalyze the oxygen evolution reaction of water electrolysis to produce hydrogen under alkaline conditions; the present invention can be applied to renewable fuel cells, photoelectrocatalysis, alkaline anion exchange membrane water electrolysis (AEMWE) and electrolysis hydrogen generator devices.

The invention discloses a preparation method of a scaly manganese-doped phosphorus / molybdenum sulfide nanosheet array electrolyzed water catalyst and a product thereof, foamed nickel and the like are used as carriers, transition metal phosphide / sulfide grows on the basis of molybdenum oxide with poor intrinsic activity through hydrothermal synthesis and heat treatment methods based on transition metal molybdenum, and the scaly manganese-doped phosphorus / molybdenum sulfide nanosheet array electrolyzed water catalyst is prepared. The flaky manganese-doped phosphorus / molybdenum sulfide nanosheet array electrolyzed water catalyst is obtained, the overpotential of electrolyzed water of the catalyst is fully reduced by utilizing the synergistic effect of the manganese-doped phosphorus / molybdenum sulfide nanosheet array electrolyzed water catalyst, the stability is relatively high, and meanwhile, the problems of high preparation cost and complicated preparation process of transition metal molybdenum-based binary oxide in the prior art are effectively solved; and the positive effect is achieved on water electrolysis hydrogen production commercialization.

The invention relates to a cobalt-free ultra-high nickel positive electrode material and a preparation method and application thereof, the preparation method comprises the following steps: ball-milling and mixing a nickel source, a lithium source and a dopant to obtain powder, and drying and sintering the obtained powder to obtain the cobalt-free ultra-high nickel positive electrode material, the doping agent comprises an aluminum-containing doping agent and a manganese-containing doping agent; the nickel source, the lithium source and the doping agent are mixed according to the molar ratio of the nickel element to the lithium element to the total doping element being (0.90-0.98): (1.03-1.06): (0.02-0.10). The Al and Mn elements are uniformly doped in the positive electrode material substrate through a solid-phase reaction method, the material performance is synergistically improved by utilizing the unique action mechanism of the doped elements, the electrochemical performance is synergistically improved on the premise of not depending on the cobalt element, and high initial discharge capacity, cycling stability and rate capability are kept in a wide voltage interval; and excellent capacity retention capability is shown in a wide multiplying power range.

The invention provides a preparation method of manganese-doped iron phosphate, and relates to the technical field of lithium ion battery positive electrode materials, the preparation method comprises the following steps: S1, preparing a phosphoric acid solution, a ferrite solution, a phosphorus-oxygen mixed solution containing a phosphorus source and an oxidizing agent, a divalent manganese salt solution and an oxidizing agent solution; s2, adding a base solution, and pumping the ferrite solution and the phosphorus-oxygen mixed solution while stirring to obtain slurry A; s3, filtering and washing the slurry A to obtain a filter cake; s4, mixing and pulping the filter cake and water, sequentially adding a divalent manganese salt solution, an oxidant solution and phosphoric acid, heating to 80-100 DEG C, and carrying out conversion reaction for 1-3 hours to obtain slurry B; s5, filtering, washing and drying the slurry B to obtain manganese-doped iron phosphate dihydrate, and calcining the iron phosphate dihydrate to obtain manganese-doped anhydrous iron phosphate; the manganese salt solution is added in the precursor preparation stage, so that the manganese element is doped into iron phosphate crystal lattices in the form of ions, and the bulk phase doping effect can be better improved.

The invention relates to the technical field of positive electrodes of hydrogen fuel cells, in particular to a method for preparing a positive electrode of a hydrogen fuel cell by using a waste manganese-based sodium-ion battery, which comprises the following steps: placing the waste manganese-based sodium-ion battery in a NaCl solution for discharging to obtain an electroless manganese-based sodium-ion battery; the method comprises the following steps of: crushing the waste carbon into manganese-based sodium-ion battery slag, blowing the slag to obtain manganese-based sodium-ion battery slag without a diaphragm and a plastic skin, soaking the manganese-based sodium-ion battery slag into an organic solvent, completely separating the waste carbon of the negative electrode from a current collector under the assistance of ultrasonic waves to obtain a clear solution, and preparing graphene oxide from the waste carbon of the negative electrode by utilizing a Hummers method; adjusting the pH value of the clarified solution, filtering to obtain sodium carbonate filter residues and manganese ion-containing filtrate, mixing graphene oxide and the filtrate, stirring, heating and drying to obtain the manganese-doped graphene catalyst, and applying the manganese-doped graphene catalyst to the positive electrode of the hydrogen fuel cell. The method can realize controllable full recovery of positive and negative electrode waste materials; selected materials are cheap and easy to control; and the prepared manganese-doped graphene catalyst has a good application effect.

This invention discloses a method for preparing 1,3-propanediol by hydrogenation of methyl 3-hydroxypropionate. Using manganese-doped layered copper silicate prepared by deposition precipitation as a precursor, a highly dispersed and stable copper-based catalyst is obtained through reduction. The manganese doping and layered copper silicate species enhance the interaction between copper and the support, improving the dispersion of active copper species. Simultaneously, the layered copper silicate increases the difficulty of copper species reduction, thereby improving the Cu content of the catalyst. + / Cu 0 The strong metal-support interaction and the dispersing effect of manganese can effectively inhibit the migration and aggregation of active copper species during the reaction, thus improving the stability of the catalyst. The copper-based catalyst prepared in this invention exhibits high conversion and 1,3-propanediol selectivity in the hydrogenation reaction of methyl 3-hydroxypropionate, with high catalytic activity and stability, and few byproducts, showing good prospects for industrial application.

The invention discloses a strontium chloride-assisted method for improving the fluorescence quantum yield of manganese-doped CsPbCl3 quantum dots, which comprises the following steps: adding cesium carbonate into octadecene, heating and stirring until uniform mixing, and injecting oleic acid to obtain a cesium oleate solution; the preparation method comprises the following steps: adding different amounts of strontium chloride auxiliary dopant, manganese chloride dopant, lead chloride, oleylamine and oleic acid into octadecene, heating and stirring to uniformly mix to obtain a precursor mixed solution; injecting the cesium oleate solution into the precursor mixed solution, reacting for a certain period of time, and cooling in ice water to room temperature to form a CsPbCl3 quantum dot stock solution; a certain proportion of a flocculating agent is added into the stock solution, and a CsPbCl3 quantum dot solution is obtained through centrifugal treatment. According to the preparation method disclosed by the invention, the quantum yield of Mn-emitted fluorescence of the Mn-doped CsPbCl3 quantum dot is improved by regulating and controlling the addition amount of the doping agent, and finally, the quantum yield of Mn-emitted fluorescence of the Sr and Mn co-doped CsPbCl3 quantum dot reaches up to 100%.

The invention discloses a preparation method of a manganese-doped CsPbBr3 single crystal, and belongs to the field of inorganic perovskite preparation. The preparation method specifically comprises the following steps: dissolving cesium bromide, lead bromide and manganese bromide in a DMSO (dimethyl sulfoxide) solvent, adding bromohexanoic acid, and fully mixing in a water bath to obtain a mixed solution I; then methanol, cyclohexanol and DMF (N, N-dimethylformamide) are fully mixed, and a mixed solution II is obtained; mixing the mixed solution I and the mixed solution II, fully stirring in a water bath, and filtering by using a filter to obtain a precursor solution; and putting a seed crystal into the precursor solution, putting the precursor and the container into silicone oil, and obtaining the manganese-doped CsPbBr3 single crystal by adopting an inverse temperature crystallization method. The manganese-doped CsPbBr3 single crystal prepared by the invention has excellent photoelectric properties and stability, and can be used for low-temperature semiconductor radiation detectors.

A manganese-doped mesoporous silica nanomaterial, and a preparation method therefor and the use thereof. The nanomaterial comprises a manganese-doped mesoporous silica nanosphere, an anti-angiogenic drug and a surface delivery system. The anti-angiogenic drug is adsorbed in the pores of the manganese-doped mesoporous silica nanosphere, and the surface delivery system is coated on the surface of the manganese-doped mesoporous silica nanosphere, wherein metal manganese ions are doped on the surface and in the framework of the mesoporous silica nanosphere. The anti-angiogenic drug is an HIF-2α inhibitor. After targeted degradation at a tumor site, the nanomaterial releases the manganese ions and the anti-angiogenic drug to realize the dual anti-tumor effects of activating local anti-tumor immunity and inhibiting angiogenesis within the tumor at a targeted tumor site; and the manganese ions and the anti-angiogenic drug have a synergistic effect. In addition, the nanomaterial has no potential toxic effect, has good biosafety, and provides a new choice for the treatment of tumors, especially pVHL-deleted tumors.

This invention relates to the field of lithium battery technology, and discloses a manganese-doped lithium iron phosphate material, its preparation method, a positive electrode, a lithium-ion battery, and electrical devices thereof. The chemical formula of the manganese-doped lithium iron phosphate material is LiMn. x Fe 1‑x PO4, where 0

The present application belongs to the technical field of lithium ion batteries, and particularly relates to a MnNiFe oxide nanosheet, a preparation method and application thereof. The present application first synthesizes NiFe LDHs nanosheets, then realizes manganese doping by using the nanosheets as a template and adopting an impregnation method, and further obtains MnNiFe oxide nanosheets after a further sintering process. The method has simple steps, low raw material cost, and potential market value. The doping of manganese ions can significantly adjust the crystallinity and structural stability of the three-metal nanomaterials. In the heat treatment process, the LDHs hydrotalcite structure is destroyed, and the anions and water disappear from the space between the layers, which promotes the formation of small pores in the material structure and also promotes the formation of nanosheets. The coordination among the three elements and the porous nanosheet structure can greatly improve the electrochemical performance, including the cycle performance and rate performance.

The invention provides a manganese-doped inorganic luminescent material as well as a preparation method and application thereof. The manganese-doped inorganic luminescent material has a chemical formula as shown in a formula I: Mg (1-x) AlGaO4: xMn (I), wherein x is greater than 0.2 and less than 1, and the manganese-doped inorganic luminescent material is capable of generating near-infrared region emission. The manganese-doped inorganic luminescent material disclosed by the invention can realize broadband near-infrared emission with the half-peak width of 133nm in a near-infrared region, the internal / external quantum efficiency can reach 93.8% / 56.8%, the thermal stability is good, the chemical property is stable, and the manganese ions serving as active ions are non-toxic and harmless, are low in cost and are convenient to realize industrial production.

A manufacturing method of a manganese-doped cobalt(II,III) tetroxide, comprising the following steps: (1) preparing an ammonium bicarbonate solution as a base solution in a reaction vessel under a protective atmosphere and a pressure of 0.1 MPa to 0.5 MPa, wherein a volume ratio of the base solution in the reaction vessel is 40% to 50% and a pH is 8 to 8.5; (2) adding a metal mixed solution and a precipitant into the reaction vessel in a constant pressure state for mixing, controlling a pH of the obtained mixed solution to decrease at a rate of 0.08 pH / h to 0.12 pH / h to a pH of 7.3 to 7.6 for reaction until a volume ratio of the mixed solution in the reaction vessel reaches 70% to 80%, and the mixed solution starts to concentrate and precipitate;During the concentration and precipitation period, continuously introducing the metal mixed solution and the precipitant to stabilize the volume ratio of the mixed solution in the reaction vessel; and stopping the reaction when a particle size of particles obtained by concentration and precipitation reaches 4 µm to 6 µm to obtain a manganese-doped cobalt carbonate particle slurry; wherein the metal mixed solution contains a cobalt salt, a divalent manganese salt, a crown ether surfactant, and a nonionic surfactant, and a mass ratio of the crown ether surfactant to the nonionic surfactant and a manganese element in the divalent manganese salt is 0.02-0.08:0.02-0.08:1;(3) after filtering the manganese-doped cobalt carbonate particle slurry, washing with an antioxidant solution for 10 minutes to 30 minutes, then drying and sieving to obtain a manganese-doped cobalt carbonate precursor;and(4) sintering the manganese-doped cobalt carbonate precursor at 650°C to 680°C for 3 to 5 hours to obtain the manganese-doped cobalt(II,III) tetroxide.;

The invention discloses application of a manganese-doped zinc germanate nanorod fluorescent probe in hypochlorous acid and sodium hypochlorite interference resistance in blood analysis, relates to the technical field of germanium-containing luminescent materials, and aims to solve the problem that hypochlorous acid and sodium hypochlorite can interfere blood detection. After the photobleached manganese-doped zinc germanate nanorod fluorescent probe disclosed by the invention is in contact with a sample containing hemoglobin, hypochlorous acid or sodium hypochlorite, fluorescence and continuous luminescence properties are recovered; the attenuation rate after the hypochlorous acid or sodium hypochlorite induced fluorescence and continuous luminescence are recovered is greater than the attenuation rate after the hemoglobin induced fluorescence and continuous luminescence are recovered; according to the method, residual bloodstains which are cleaned by hypochlorous acid or sodium hypochlorite and cannot be seen by naked eyes in the sun can be identified and detected by utilizing the characteristic that the fluorescence decay rate after the reaction fluorescence of photobleached ZGO: Mn NRs and hypochlorous acid or sodium hypochlorite is recovered is greater than the fluorescence decay rate after the fluorescence induced by hemoglobin is recovered.

The invention discloses a manganese-doped carbon dot and a preparation method and application thereof.The preparation method comprises the steps that citric acid is dissolved in deionized water, then MnCl2. 4H2O, ethanediamine and N-acetylcysteine are sequentially added and fully dissolved, and a hydrothermal reaction is conducted to obtain the small-particle-shaped manganese-doped carbon dot. According to the invention, the inorganic substance MnCl2. 4H2O which is widely anti-inflammatory and anti-oxidation is utilized to participate in the preparation of the carbon dots through a simple hydrothermal synthesis method, and the obtained manganese-doped carbon dots have the advantages of excellent multi-enzyme activity, good biocompatibility and the like, and have good application prospects in the aspects of inflammatory enteritis, colitis recovery and the like.

The application discloses a preparation method of a manganese-doped ruthenium-based metal nanoparticle catalyst, and relates to the technical field of catalysts, in particular to a preparation method of a manganese-doped ruthenium-based metal nanoparticle catalyst.The preparation method comprises the following steps: ultrasonic dissolving a ruthenium salt and a manganese salt in hydrochloric acid to obtain a homogeneous solution; adding carbon black into the homogeneous solution, stirring and drying to obtain a manganese-doped ruthenium-based metal nanoparticle catalyst precursor; carrying out high-temperature annealing reduction treatment on the precursor to obtain a manganese-doped ruthenium-based metal nanoparticle catalyst loaded on the surface of the carbon black; carrying out heat treatment to obtain a manganese-doped ruthenium-based metal nanoparticle catalyst without a carbon black carrier; and immersing in an acid solution to remove unstable manganese substances to obtain the manganese-doped ruthenium-based metal nanoparticle catalyst.The application further discloses the catalyst obtained by the above preparation method and application of the catalyst in electrocatalytic oxidation of nitrogen to prepare nitrate.The method can obtain a manganese-doped ruthenium-based metal nanoparticle catalyst in the form of uniform, super-small nanoparticles, and the manganese-doped ruthenium-based metal nanoparticle catalyst has good electrocatalytic oxidation of nitrogen performance and stability when applied in electrocatalytic oxidation of nitrogen to prepare nitrate.

The application relates to a manganese-doped lithium nickelate positive electrode material and a preparation method thereof, a positive electrode sheet, a battery and an electric device, the preparation method comprising the following steps: S1, mixing a nickel-manganese hydroxide precursor, a first lithium source and a chloride, and then obtaining an intermediate product through a molten salt method under an oxygen atmosphere, wherein the intermediate product comprises single-crystal manganese-doped lithium nickelate with a manganese valence of +3; S2, mixing the intermediate product with a second lithium source, and then performing heat treatment under an oxygen atmosphere to obtain single-crystal manganese-doped lithium nickelate with a manganese valence of +4; wherein the amount of the first lithium source is 100%-130% of the molar amount of the nickel-manganese hydroxide precursor; the amount of the second lithium source is less than 15% of the mass of the intermediate product; and the holding temperature of the heat treatment is 600 DEG C-700 DEG C. The preparation method can improve the oxidation state of manganese elements, and further improves the cycle stability of the prepared positive electrode material.