82 results about "Manganese doping" patented technology

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 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.

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.

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.

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 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 application relates to a preparation method and application of a rich-pore nanospherical manganese-doped sodium vanadium fluorophosphate positive electrode material. The preparation method is as follows: a vanadium source, hydrogen peroxide and a solvent are uniformly mixed to obtain a mixed solution A; then, a sodium source, a phosphorus source and a fluorine source are added to obtain a mixed solution B; after the mixed solution B is transferred into a reaction kettle and high-temperature reaction, solid powder A is obtained through washing and drying, then, inert gas heating sintering is carried out, and the rich-pore nanospherical fluorophosphate of vanadium is obtained. The material has a rich-pore structure, can effectively shorten the electron and ion transmission path, the multi-pore structure can effectively buffer the volume change of the material in the charging and discharging process, guarantees the structural stability of the material, meanwhile, manganese doping further improves the intrinsic conductivity of the material, stabilizes the structure of the material, and improves the cycle performance of the material. Therefore, the material exhibits excellent long cycle performance as a sodium ion battery positive electrode.

This invention discloses a Mo-Mn biodegradable molybdenum alloy, its preparation method, and its applications. The alloying elements include Mo and Mn, with Mn accounting for >0-30% by mass, and the remainder being Mo. Manganese-doped molybdenum powder is prepared by wet chemical methods or mechanical alloying. The manganese-doped molybdenum powder is then subjected to hot pressing sintering or multi-step spark plasma sintering to obtain the Mo-Mn alloy. The Mo-Mn biodegradable molybdenum alloy of this invention possesses excellent mechanical properties, providing long-term effective mechanical support in vivo, and exhibits good cell compatibility, blood compatibility, and tissue / organ compatibility, making it suitable for use as a biomedical implant.

A glass-ceramic that includes: SiO2 from 40 mol % to 80 mol %; Al2O3 from 3 mol % to 20 mol %; B2O3 from 3 mol % to 50 mol %; WO3 plus MoO3 from 1 mol % to 18 mol %; Fe2O3 plus MnO2 from 0.1 mol % to 2 mol %; and R2O from 0 mol % to 15 mol %. The R2O is one or more of Li2O, Na2O, K2O, Rb2O and Cs2O. Further, R2O—Al2O3 ranges from −12 mol % to +4 mol %.

This invention proposes a method for preparing a honeycomb-structured biomatrix-mediated hydrophobic calcium-based adsorbent, comprising the following steps: preparing a stabilizer gel, a template agent solution, and a precursor mixture containing calcium and manganese sources respectively; mixing the template agent solution and the stabilizer gel to form a supramolecular mixture; adding the supramolecular mixture dropwise to the precursor mixture to form microspheres and aging them; subjecting the microspheres to directional freezing and then freeze-drying to form honeycomb-like channels within the microspheres; calcining the microspheres under an inert atmosphere to form a hydrophobic carbon film and inducing manganese doping to form oxygen vacancies, thereby obtaining a honeycomb-structured biomatrix-mediated hydrophobic calcium-based adsorbent. This invention reduces the diffusion resistance of carbon dioxide in the calcium-based adsorbent, making it difficult for the calcium-based adsorbent to aggregate during high-temperature cycling, reducing the interference of water molecules, and improving the adsorption performance for carbon dioxide.

The invention discloses preparation and application of a manganese oxide doped graphene flexible electrochemical sensor, and belongs to the technical field of electrochemical sensing. The preparation method comprises the following steps: firstly, preparing a manganese oxide doped graphene electrode through one-step laser induction, then preparing a manganese oxide doped graphene flexible electrochemical sensor by using the manganese oxide doped graphene electrode, and then detecting fenitrothion through the flexible electrochemical sensor. The detection result shows that the flexible electrochemical sensor has excellent detection effect and detection stability on fenitrothion.

The application relates to the field of ceramic materials, and provides a high-pressure-resistant PTC (Positive Temperature Coefficient) thermosensitive ceramic material, a preparation method and application, aiming to improve the pressure resistance and PTC effect stability of the thermosensitive ceramic. The material is composed of alumina-coated manganese-doped barium titanate nanorods, hollow silica microspheres and glass phase sintering aids, a core-shell structure and a three-dimensional composite system are constructed, and the electric heating performance and microstructure stability are optimized. The structure of raw materials is precisely controlled through a hydrothermal method and a sol-gel method, alcohol dispersion, flow casting and weak oxidation atmosphere sintering are combined, and the ceramic density and consistency are ensured. The material is suitable for high-voltage temperature control elements and overcurrent protection devices, and is widely applied to the fields of over-temperature protection of new energy automobile battery packs, current limiting elements of high-voltage power equipment and industrial automation temperature control switches.

The application discloses a preparation method and application of manganese-doped micron iron modified material, and the preparation method is as follows: using a divalent manganese salt and micron zero-valent iron as raw materials, doping the divalent manganese salt on the surface of the zero-valent iron through a solid-phase ball milling method to obtain micron iron whose surface is modified by the divalent manganese. 0 The preparation method utilizes a mechanical ball milling technology to strengthen the action of manganese ions on the surface of the micron iron and promote the electron transmission capacity of the core Fe of the micron iron, so that the reduction capacity of the micron iron is improved. The prepared manganese-doped micron iron modified material is added into a solution containing hexavalent chromium pollutants, and is used for reducing and removing the hexavalent chromium, so that the problem of low activity of the micron iron in treating the hexavalent chromium is solved, and the manganese-doped micron iron modified material has a good prospect in repairing a hexavalent chromium pollution environment.

The application discloses a monatomic manganese-doped Ti3C2 nanomaterial self-supporting film, a preparation method and an assisted in-vivo curved surface mass spectrum imaging method.The monatomic manganese-doped Ti3C2 (Mn@Ti3C2) has the advantages of low background interference, good salt resistance and protein resistance, high stability and accuracy, and lower detection limit and quantitative limit, as compared with traditional organic matrixes DHB and CHCA.Secondly, the Mn@Ti3C2 self-supporting film which is bendable and has high adsorption is used to assist LDI-MSI, so that the molecular coverage and resolution are improved, metabolites such as lactic acid, inositol, amino acid and coenzyme of the skin are in-situ detected, and the spatiotemporal dynamic change mechanism of metabolism is in-situ and non-invasively revealed from a microscale.The application has important significance for exploring biomarkers for disease diagnosis and provides theoretical guidance and technical support for the research on metabolic mechanisms of other in-vivo curved surface parts.

The invention discloses a manganese-doped ruthenium oxide nano-catalyst, a preparation method thereof, an electrode and a water electrolysis hydrogen production device, and relates to the technical field of catalytic materials. The molar ratio of ruthenium to manganese in the catalyst is (5-9): 1; the average particle size of the catalyst is 6-8 nm. The manganese element is introduced to construct a stable composite structure, the structural stability is greatly improved while high intrinsic activity is maintained, in addition, good oxygen evolution and corrosion resistance are achieved, water oxidation of the acid electrolyte is driven at a low potential, good stability is maintained, and the service life of the acid electrolyte is prolonged. And the defect of poor stability of a commercial ruthenium oxide catalyst in an acid medium is overcome. The catalyst can well adapt to large-scale hydrogen production application in the future, and reaches the application standard of clean energy in the future. The preparation method belongs to one-pot molten salt synthesis, is simple, convenient and efficient in preparation, and provides a key material solution for an efficient and long-life proton exchange membrane water electrolysis hydrogen production technology.

The invention relates to a manganese-doped cerium-tungsten composite oxide catalyst as well as a preparation method and application thereof, the chemical general formula of the manganese-doped cerium-tungsten composite oxide catalyst is MnaCe1-aWbOx, 0 lt, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 A < lt >; 0.15, 0.1 lt, 0.15, 0.1 lt; blt; and 0.3. The manganese-doped cerium-tungsten composite oxide catalyst provided by the invention shows excellent catalytic activity in a temperature range of 175-450 DEG C, and has more excellent sulfur resistance and water resistance at 250 DEG C. The manganese-doped cerium-tungsten composite oxide catalyst prepared by adopting a coprecipitation method has a very wide active temperature window and excellent sulfur resistance, can be applied to the field of denitration of fixed-source low-concentration sulfur-containing flue gas, and is simple in preparation method, environment-friendly and low in cost.

The invention discloses a manganese-doped copper sulfide catalyst as well as a preparation method and application thereof, and belongs to the technical field of electrochemical resource recovery. The technical problem to be solved is to provide a manganese-doped copper sulfide catalyst which can significantly improve the separation purity of target metal, reduce the operation energy consumption of a system and ensure long-term stability. According to the technical scheme, the manganese-doped copper sulphide catalyst for metal recovery is provided, a multi-stage potential gradient reaction device is coordinated, and multivalent metal ions are selectively recovered through a potential gradient-forced mass transfer mechanism coupling method. The method has the technical effects that the selective recovery efficiency of multivalent metal ions is remarkably improved, and the method has the advantages of wide potential adaptability, low-energy-consumption operation and high stability.

The invention discloses a preparation method and application of magnesium-manganese double-doped lithium iron phosphate, and belongs to the technical field of preparation of lithium iron phosphate. The method comprises the following steps: ball-milling and mixing a lithium source, an iron source, a phosphorus source, a manganese source, a carbon source and a solvent together, drying to obtain a precursor A, and calcining the precursor in a nitrogen environment to obtain a manganese-doped lithium iron phosphate material; mixing the manganese-doped lithium iron phosphate material with a magnesium source and a carbon source, grinding in a ball mill by taking absolute ethyl alcohol as a dispersion medium, and drying to obtain a precursor B; and calcining the precursor B under a nitrogen condition to obtain the magnesium-manganese double-doped lithium iron phosphate positive electrode material. Bimetal step-by-step doping treatment is provided, through secondary sintering treatment, the specific capacity of lithium iron phosphate is improved, the electrochemical performance of the lithium iron phosphate is improved, and the lithium iron phosphate is also excellent in performance under the low-temperature condition.

This application discloses a manganese-doped two-dimensional hybrid perovskite material, its preparation method, and its applications, belonging to the field of materials science. The chemical formula of the manganese-doped two-dimensional hybrid perovskite material is C2. 22 H 36 Br4N2Pb: 5.8–60% Mn. This manganese-doped two-dimensional hybrid perovskite material is an organic-inorganic hybrid perovskite compound with excellent scintillation properties. Its synthesis method is simple, low-cost, mild under mild reaction conditions, and highly stable. It has good application prospects in photodetectors, photovoltaic devices, field-effect transistors, light-emitting diodes, and scintillator imaging.

The invention relates to a water-soluble manganese-doped titanium dioxide nanorod as well as a preparation method and application thereof, and belongs to the technical field of nano material preparation. The preparation method of the water-soluble manganese-doped titanium dioxide nanorod comprises the following steps: adding titanium tetrachloride into oleic acid to prepare a titanium oleate compound precursor; dissolving manganese oleate in oleic acid, carrying out ultrasonic treatment, adding the titanium oleate compound precursor, and continuously carrying out ultrasonic treatment to obtain a titanium oleate and manganese oleate compound precursor; the preparation method comprises the following steps: taking a compound precursor of titanium oleate, adding a mixed system of oleylamine, oleic acid and octadecene, injecting the compound precursor of titanium oleate and manganese oleate to obtain an oil-soluble manganese-doped titanium dioxide nanorod, and carrying out water-soluble surface modification through sodium citrate to obtain the water-soluble manganese-doped titanium dioxide nanorod. The nanorod prepared by the invention can be used as an excellent T1 magnetic resonance molecular imaging contrast agent, and has important application value and wide application prospect in the biomedical imaging fields of tumor detection, angiography and the like.

This invention discloses a fluorescent material of divalent manganese-doped Zn₂GeO₄, its preparation method, and a high-sensitivity optical pressure measurement application based on this material, belonging to the field of fluorescent material preparation and pressure sensing applications. The material is prepared using a DC arc method and has the general chemical formula: Zn₂GeO₄:xMn 2+ Where 0.002 ≤ x ≤ 0.030. Mn 2+ Replace Zn 2+ The location shows a single broadband green light emission at 533nm, originating from... 4 T1( 4 G) to 6 A1( 6 S) Energy level transition. The preparation method of the divalent manganese-based fluorescent material described in this invention is low-cost, convenient to operate, and also has the characteristics of green synthesis. The intensity ratio pressure measurement method based on the single fluorescence emission peak of this material exhibits extremely high pressure sensitivity and has important application prospects in the field of optical pressure measurement under extreme environmental pressure scenarios.