132 results about "Manganese doping" patented 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.

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.

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.

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.

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.

The invention discloses a magnesium-manganese doped vacancy bismuth oxide nano material as well as a preparation method and application thereof, and belongs to the technical field of biomedical materials. The preparation method comprises the following steps: dissolving NaBiO3 and NaOH in deionized water, adding soluble magnesium salt and soluble manganese salt, stirring at room temperature, transferring the formed suspension solution into a reaction kettle, heating, reacting, separating, washing and drying the reaction product to obtain magnesium-manganese doped vacancy bismuth oxide, dispersing the magnesium-manganese doped vacancy bismuth oxide in a mixed solution of deionized water and ethanol, and ultrasonically crushing with ice water to obtain the magnesium-manganese doped vacancy bismuth oxide. Centrifuging, taking supernatant, centrifuging again, taking precipitate, washing, and drying to obtain a finished product. The MMBOx is synthesized by adopting a one-step hydrothermal method, the method is efficient and simple, the ROS programmable capability is achieved, the sonodynamic / enzymatic activity is improved through the piezoelectric effect and oxygen vacancy doping to promote ROS generation, meanwhile, the ROS is lowered through cascade catalytic enzyme activity, Mg < 2 + > is slowly released to promote tissue repair, the inflammation microenvironment is improved, and the method is particularly suitable for tissue infection repair.

This invention belongs to the field of hydrometallurgical technology, specifically relating to a method for enhanced gold extraction from cyanide tailings based on magnetically controlled hydrothermal magnetization activation and manganese doping treatment. The method includes: providing cyanide tailings particles; adding the cyanide tailings particles and a biomass reducing donor to an aqueous medium to form a slurry; adjusting the pH of the slurry to obtain an alkaline reaction system; adding a magnetothermal medium of ferric oxide or ferric chloride to the slurry and stirring with MnSO4 to obtain a reaction slurry; placing the reaction slurry in a closed magnetically controlled hydrothermal reactor and conducting a hydrothermal reaction under an external magnetic field; after cooling the reaction product, performing solid-liquid separation; performing graded magnetic separation on the solid phase; leaching the non-magnetic product using a thiosulfate-ammonia system to allow gold to enter the leaching solution; adding a recyclable magnetic gold-capturing carrier to the leaching solution for adsorption and enrichment; recovering the carrier through magnetic separation and regenerating it through analysis to obtain a gold-rich solution; and recovering gold from the gold-rich solution. The above method can stably achieve a synergistic gain in gold extraction and harm reduction under low-temperature hydrometallurgical conditions.

The invention relates to the technical field of sodium ion batteries, in particular to a modified ferric sodium pyrophosphate positive electrode material as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) reacting an oxalic acid source, an iron source and a manganese source in an aqueous solution to obtain an iron manganese oxalate intermediate; and (2) uniformly mixing the ferric manganese oxalate intermediate with sodium phosphate, sodium pyrophosphate and a reducing agent, heating to obtain a gelatinous solid, drying and sintering to obtain the modified ferric sodium phosphate pyrophosphate positive electrode material. The nucleation and growth rate of particles in the precipitation process is regulated and controlled through manganese ions by adopting a coprecipitation method, so that the particles are more tightly stacked, the compaction density of the product is effectively improved, meanwhile, the conductivity and the structural stability of the ferric sodium pyrophosphate can be effectively improved through manganese doping, and the performance of the ferric sodium pyrophosphate is improved. Therefore, the prepared modified sodium ferric pyrophosphate positive electrode material has relatively high discharge platform voltage and energy density, and excellent rate capability and cycle performance.

The present application relates to the field of water treatment catalysis, and discloses a zeolite-based bimetallic catalyst for selective generation of active oxygen species, a preparation method and application thereof, the preparation method comprising the following steps: step 1, treating a zeolite molecular sieve with an inorganic acid, filtering and drying the product to obtain a zeolite molecular cavity material with silanol cavity defects; step 2, mixing the zeolite molecular cavity material with a manganese salt solution, drying, grinding and calcining to obtain a manganese-doped catalyst; step 3, mixing the manganese-doped catalyst with a platinum salt solution, drying, grinding and calcining to obtain the zeolite-based bimetallic catalyst; by adjusting the molar ratio of manganese in the manganese salt and platinum in the platinum salt, the contribution rate of different active oxygen species generated by the zeolite-based bimetallic catalyst is controlled, and specific active oxygen species can be selectively generated under different environmental requirements, which is of great significance for efficient or selective degradation of organic pollutants under different environments.

The application belongs to the field of materials, and discloses a preparation method of a bifunctional alkaline water electrolysis manganese-doped nickel sulfide / porous nickel foam electrode. The application is prepared by two-step electrodeposition, first activates the nickel foam substrate, and then electrodeposits nickel sulfide on the activated porous nickel foam substrate and dopes manganese. The manganese-doped nickel sulfide nanostructure grown on the porous nickel foam builds an electrode that can be used for bifunctional water electrolysis. The porous structure of the electrode can effectively accelerate the mass transfer process and promote the rapid escape of the bubbles generated by the reaction under high current density. In addition, the doping of manganese optimizes the electronic structure of the nickel sulfide, and the nickel sulfide has the characteristics of enhanced conductivity, increased electrochemical active area, fully exposed active sites, and optimized intermediate adsorption. The preparation method provides an effective strategy for the preparation of high-performance electrodes in actual water electrolysis.

The invention discloses a sodium niobate / molybdenum diselenide heterojunction and a preparation method and application thereof. The invention provides a sodium niobate / molybdenum diselenide heterojunction which comprises manganese-doped sodium niobate and molybdenum diselenide, and the ion molar ratio of Nb to Mo in the manganese-doped sodium niobate and molybdenum diselenide is 1.5: (0.5-3). The doped sodium niobate / molybdenum diselenide heterojunction has high piezoelectric performance and sonodynamic performance and has enzyme-like activity, under high-power ultrasonic driving, the sonodynamic and enzyme-like activity of the material is enhanced through the piezoelectric effect of the material, multiple ROS are generated, bacteria are killed in a synergistic mode, and biological membranes are removed; under the driving of low-power ultrasonic waves, oxidative stress materials are relieved, osteoblasts are proliferated and differentiated, and potential application prospects are achieved in the aspect of treating infectious bone tissues.

The invention belongs to the technical field of ferroelectric materials, and particularly relates to a Sr0. 4Na0. 2NbO3 doped Bi0. 5Na0. 5TiO3 (BNT) based ferroelectric film and a preparation method of the Sr0. 4Na0. 2NbO3 based ferroelectric film. A modified sodium bismuth titanate Bi0. 5Na0. 5TiO3 (BNT)-based material is doped with A / B site elements, Sr0. 4Na0. 2NbO3 with a tungsten bronze structure is selected as a doping component, the chemical composition is (0.94-x) Bi0. 5Na0. 5Na0. 2NbO3, the doping amount of the Sr0. 4Na0. 2NbO3 is 0.01-0.1, the doping amount of the Sr0. 4Na0. 2NbO3 is 0.01-0.1, and 1 mol% of manganese is additionally doped on the basis of the Sr0. 4Na0. 2NbO3. The lead-free ferroelectric film is prepared by a sol-gel method. The breakdown resistance (Eb) and recoverable energy storage density (Wrec) of the sodium bismuth titanate-based lead-free ferroelectric film prepared according to the invention are remarkably improved, compared with an undoped sample, the Eb is improved by 56%, the maximum polarization intensity (Pmax) reaches 102.4 [mu] C / cm < 2 >, and the Wrec is improved from 94.11 J / cm < 3 > to 128.82 J / cm < 3 > and improved by 37%.

The invention relates to a preparation method of a Mn-EG-MoS2 flexible electrode with a hierarchical confinement structure. The Mn-EG-MoS2 flexible electrode with the hierarchical confinement structure is prepared mainly through a strategy of manganese (Mn) doping and ethylene glycol (EG) covalent intercalation. According to the invention, introduction of manganese atoms can limit and effectively regulate and control the electronic structure of MoS2 from an atomic level, promote conversion from a 2H phase to a 1T phase of MoS2, increase the density of active sites and improve the intrinsic conductivity. EG molecules expand the interlayer spacing of MoS2 through the covalent intercalation effect, so that re-stacking of nanosheets is effectively inhibited, the number of exposed active sites is increased, and meanwhile, a rapid channel is provided for ion transmission. According to the structural design, the specific capacitance and the structural stability of the material are greatly improved. When the material is applied to the negative electrode of the supercapacitor, the mass specific capacitance is increased to more than three times of that of unmodified molybdenum disulfide, and the material shows excellent cycling stability.

The present invention discloses a manganese-doped fluoride composite carbon material and its preparation method and application. The manganese-doped fluoride composite carbon material comprises: a perovskite-type KFe x Mn 1‑x The material matrix is ​​composed of F3 grains, and the surface of the material matrix is ​​doped with carbon; wherein 0.2≤x≤0.8. The preparation method comprises: S1, using KF, FeF2 and MnF2 as raw materials, mixing and ball milling according to a preset molar ratio to obtain KFe with a cubic perovskite structure x Mn 1‑x F3 material matrix; S2, adding carbon, and the KFe x Mn 1‑x The F3 material matrix is ​​mixed and ball-milled to obtain the manganese-doped fluoride composite carbon material. The manganese-doped fluoride composite carbon material of the present invention can be used as a negative electrode material for lithium-ion batteries or sodium-ion batteries.