131 results about "MANGANESE ACETATE" patented technology

The invention discloses a photocatalytic material with a baseball-shaped structure as well as a preparation method and application of the photocatalytic material, and belongs to the technical field of photocatalytic synthesis of ammonia. The invention discloses a photocatalytic material with a baseball-shaped structure. The photocatalytic material comprises FeMOF with a rod-shaped structure and MnMOF with a spherical structure, the photocatalytic material with the baseball-shaped structure takes FeMOF with a rod-shaped structure as a substrate, and MnMOF with a spherical structure grows on the FeMOF with the rod-shaped structure; and the MnMOF with the spherical structure contains acetate ions. The preparation method comprises the following steps: dissolving an iron source and a manganese source in a solvent, adding an organic ligand, carrying out ultrasonic treatment, and carrying out a hydrothermal reaction; the manganese source is manganese acetate tetrahydrate. According to the photocatalytic material with the baseball-shaped structure, MnMOF with the spherical structure uniformly grows on FeMOF with the rod-shaped structure to form an electron and hole conversion channel, so that the electron and hole transmission rate is enhanced, the photocatalytic performance of the bimetal organic framework structure is enhanced, and the yield of photocatalytic synthesis ammonia is remarkably improved.

The invention discloses a method for synthesizing a Mn0. 43Cd0. 57S / Cu2MoS4 photocatalyst by adopting a solvothermal method, and belongs to the technical field of catalysts. The preparation method comprises the following steps: preparing copper molybdenum sulfide by using cuprous oxide as a template, synthesizing copper molybdenum sulfide with high purity and good crystallinity by combining a solvothermal method, preparing manganese cadmium sulfide by using manganese acetate, cadmium acetate, sodium hydroxide and thioacetamide as raw materials, adding copper molybdenum sulfide before a hydrothermal reaction, successfully modifying the manganese cadmium sulfide by constructing a heterojunction, and preparing the copper molybdenum sulfide modified manganese cadmium sulfide. The Mn0. 43Cd0. 57S / Cu2MoS4 photocatalyst is synthesized, and the photocatalytic hydrogen production rate of the cadmium manganese sulfide is improved. Moreover, the hydrogen production rate of the Mn0. 43Cd0. 57S / Cu2MoS4 photocatalyst prepared by the invention can reach 8233 mu mol / (g.h), which is 2.08 times of the hydrogen production rate of pure cadmium manganese sulfide, and 1.24 times of the hydrogen production rate of cadmium manganese sulfide loaded with 1% platinum.

The present invention relates to the technical field of plastic recycling, and disclosed are a method for preparing a regenerated resin from PET recyclate and a use thereof. The method comprises the following steps: mixing PET recyclate, a polyol, and a catalyst; carrying out elevated temperature reaction; after cooling, adding a polybasic acid or a polybasic acid anhydride for reaction; and after the reaction is finished, cooling to obtain a regenerated resin. The polyol is selected from at least one of diethylene glycol, tripropylene glycol, and polyethylene glycol; the average functionality of the polybasic acid is greater than 2; and the catalyst is selected from at least two of zinc acetate, manganese acetate, and tetrabutyl titanate. According to the present invention, the regenerated resin is applied to the preparation of water-based ink, so that the water-based ink achieves the same printing performance as acrylic resin ink. In the method of the present invention, no waste is generated during polymerization, achieving a 100% recycling rate for waste plastic. Fossil raw materials are saved, and PET recyclate is also fully utilized, achieving the objective of turning waste into wealth.

The invention relates to a composite honeycomb activated carbon adsorption material and a preparation method thereof, and belongs to the technical field of activated carbon, and the composite honeycomb activated carbon adsorption material comprises the following raw materials: composite modified activated carbon, a binder, a polytetrafluoroethylene emulsion and deionized water. Manganese acetate, zirconium tetrachloride and copper acetate are added in the process of preparing the composite modified activated carbon, three elements of manganese, zirconium and copper are introduced to achieve a synergistic effect, meanwhile, a 2-imidazolone aqueous solution is added to introduce a nitrogen-containing functional group with high electronegativity, a sodium para aminobenzoate aqueous solution is added to introduce an amino functional group, and the composite modified activated carbon is prepared. And formaldehyde can be effectively adsorbed and removed, so that the prepared composite honeycomb activated carbon adsorption material finished product has excellent formaldehyde adsorption and purification performance.

The anionic manganese oxide nanoparticle nucleic acid scavengers are biodegradable anionic scavengers with low cytotoxicity, which are able to scavenge (bind) cell-free nucleic acids (e.g., extracellular ssRNA, dsRNA, and unmethylated DNA), providing treatment for various medical conditions. The main component of the scavenger is manganese oxide, which may be synthesized by using a manganese compound (e.g., manganese acetate) and an acid (e.g., tannic acid) at high temperature (e.g., 100-150° C.). Synthesis may be performed by mixing a manganese compound and an acid in water forming a mixture, which is stirred, heated, and allowed to cool. The anionic manganese oxide nanoparticles are extracted from the cooled mixture. The typical size of the resultant nanomaterials ranges from 30 to 100 nm; the zeta potential of the as-prepared nanomaterials is about −20 mV. The nanoparticles have various uses, including administration to a subject to treat inflammation or to treat cancer.

The application discloses a kind of potassium-doped chain-like trimanganese tetroxide positive electrode materials and its preparation method and application, belong to the field of aqueous zinc-ion battery, preparation method includes: configuration isopropanol and deionized water mixed solution with a portion of.In magnetic stirring, manganese acetate, potassium chloride and nitrilotriacetic acid are dissolved into mixed solution, K-Mn-NTA, i.e.K-Mn-NCs precursor is prepared by hydrothermal method;Afterwards, K-Mn3O4-NCs is prepared by annealing method;Finally, polyaniline is in-situ polymerized on K-Mn3O4-NCs to obtain K-Mn3O4-NCs@PANI;The positive electrode material of the application is applied to zinc-ion battery, can improve the cycle performance and rate capability of zinc-ion battery, improve the conductivity of positive electrode material while inhibiting the dissolution of Mn, improve the electrochemical performance of zinc-ion battery.

The invention relates to a preparation method of a low-cost high-performance sodium-ion battery cell. The low-cost high-performance sodium-ion battery cell comprises a positive electrode, a negative electrode, a diaphragm and an electrolyte, the preparation method comprises the following steps: adding sodium carbonate, ferrous oxalate, manganese acetate, ammonium dihydrogen phosphate, a mercaptoethyl guanidine dihydrobromide complexing agent, glucose and ethanol into a ball milling tank for ball milling, and performing vacuum drying to obtain a precursor; placing the precursor in a tubular furnace, and performing high-temperature calcination in an argon atmosphere to obtain an active material; uniformly stirring and mixing an active material, a carbon nanotube, a binder and dimethyl sulfoxide, coating a titanium sheet with the mixture, and drying to obtain a positive electrode; the mercaptoethyl guanidine dihydrobromide complexing agent is prepared from mercaptoethyl guanidine (MEG) dihydrobromide, ethylene oxide and allyl trimethyl ammonium bromide; the prepared battery cell of the ion battery has excellent rate capability and capacity retention ratio, shows excellent structural stability and electrochemical performance, and has a relatively good application prospect.

This disclosure presents a pure-phase alkaline earth metal Mn-based perovskite catalyst and its preparation method, belonging to the field of catalytic material preparation technology. The preparation method includes: weighing the A-site ion raw material corresponding to the product and manganese acetate, adding deionized water and stirring until completely dissolved, then continuing stirring for a first time to obtain a metal ion solution; adding a complexing agent to the metal ion solution, stirring until glycine is completely dissolved, then continuing stirring for a second time to form a stable complex solution; evaporating the complex solution under water bath conditions to a viscous liquid, and then heating the viscous liquid to obtain a powdered precursor; calcining the powdered precursor, and cooling to obtain a pure-phase AMnO3 perovskite catalyst powder free of impurities. By optimizing the complexation process and calcination parameters, stable preparation of pure-phase AMnO3 perovskite with Mg, Ca, Sr, and Ba at the A-site is achieved, while ensuring excellent catalytic performance of the catalyst.

The invention discloses a photocatalyst for hydrogen production by reforming a formaldehyde solution and a preparation method of the photocatalyst, and belongs to the crossing field of catalyst preparation and a hydrogen energy technology. The photocatalyst is a bimetallic structure material with different Mn and Ni molar ratios, and the molecular formula of the photocatalyst is MnxNiy / C3N4. The preparation method comprises the following steps: adding manganese acetate and nickel chloride in different proportions to adjust the feeding ratio of Mn to Ni in the catalyst, uniformly dispersing the mixture in deionized water containing C3N4, dropwise adding a sodium borohydride solution, continuously stirring to obtain a precursor, and calcining in a hydrogen atmosphere to obtain the catalyst. The photocatalyst can synchronously realize formaldehyde degradation and stable hydrogen production, and the hydrogen production rate can reach 134.53 mmol.h <-1 >. G <-1 >. The photocatalyst shows excellent photocatalytic formaldehyde reforming hydrogen production performance under the mild reaction condition without a sacrificial agent, the problem that a traditional catalyst depends on the sacrificial agent can be solved, and the dual benefits of pollutant degradation and clean energy preparation can be achieved through efficient conversion of formaldehyde.

The invention belongs to the technical field of battery materials, and provides a sea urchin-shaped Mn2O3 positive electrode material and a preparation method and application thereof. The preparation method comprises the following steps: mixing manganese acetate, polyvinylpyrrolidone and ethanol to obtain a mixed solution; mixing trimesic acid and ethanol to obtain a trimesic acid solution; mixing the mixed solution and a trimesic acid solution, heating and stirring to obtain a precursor; and calcining the precursor. The Mn2O3 positive electrode material provided by the invention has a sea urchin-shaped morphology, provides more reaction active sites, has a relatively high specific surface area, increases the contact area with an electrolyte, accelerates electrochemical reaction, and improves the electrochemical activity and structural stability of an aqueous battery; the sea urchin-shaped morphology is beneficial to relieving volume expansion caused by the positive electrode material in the charging and discharging process, and the cycling stability is improved; the preparation method is simple, raw materials are easy to obtain and low in cost, the method is simple, and the prepared sea urchin-shaped Mn2O3 positive electrode material is good in controllability and suitable for large-scale production.

The invention discloses a supported catalyst and a method for preparing the catalyst based on laser etching, and the method comprises the following steps: 1, adding manganese acetate and one or more transition metal salts into water, and fully stirring and mixing to obtain a transition metal mixed solution A; 2, a chelating agent is added into the transition metal mixed solution A, the pH value of the mixed solution is adjusted, and a mixed solution B with the pH being 7-8 is obtained; 3, foamed nickel is placed in a reactor, the mixed solution B is added to immerse the foamed nickel, a water bath reaction is conducted till jelly is formed on the surface of the foamed nickel, then the foamed nickel and the jelly are dried together, and a precursor C is obtained; and 4, performing laser etching on the precursor C by using CO2 to obtain the catalyst MnO2 / MxOy (at) NF. The catalyst is simple in preparation process and low in price, and the prepared catalyst has high catalytic activity for oxidizing NO and has excellent thermal stability and long service life.

The application discloses a kind of step-by-step doping preparation ultra-thin BME ceramic dielectric capacitor and preparation method, and the ultra-thin BME ceramic dielectric capacitor is by dielectric layer and dielectric layer mutual superposition and is fired, the dielectric layer includes dielectric layer and electrode printed on dielectric layer, the dielectric layer includes the following raw materials: coated BSCT main matrix, liquid flux agent;Coated BSCT main matrix includes the following raw materials: BSCT material, magnesium nitrate, manganese acetate, oxovanadium oxalate, rare earth nitrate;Liquid flux agent is by nano copper oxide, tetraethyl orthosilicate, tributyl borate in proportion, targeted doping is carried out by step-by-step doping, and new three-layer structure is formed to obtain good comprehensive performance.

This invention discloses a method for coupling physicochemical treatment and biodegradation of plastics. The method includes the following steps: S1. Mixing plastics, organic solvents, and a metal catalyst, and reacting to degrade them to obtain organic products. The metal catalyst is cobalt acetate and / or manganese acetate; S2. Biodegrading the organic products from step S1 using a mixed colony, which includes *Pseudomonas*, *Bacillus*, *Flavobacterium*, and *Rhodococcus*. This invention uses cobalt acetate and / or manganese acetate as metal catalysts. The catalytic oxidation of the metal catalyst can efficiently depolymerize traditional plastics, overcoming the bottleneck of C-C bond breaking that is difficult for microorganisms to achieve. It can successfully convert plastics into organic products mainly composed of dicarboxylic acids, benzoic acid, and terephthalic acid, and the mixed colony process completely mineralizes the organic products. This method achieves complete removal of plastics without producing any toxic or harmful substances.

The invention discloses a peach ketone synthesis method, which relates to the technical field of essence and perfume synthesis, and comprises the following steps: adding cyclopentanone and glacial acetic acid into a reaction container, starting stirring, adding manganese acetate (II) and cobalt acetate (II), and then adding acetic anhydride; introducing dried air below the liquid level, heating to 80-100 DEG C, dropwise adding D-limonene, and carrying out a heat preservation reaction after dropwise adding is finished; gC monitors the reaction endpoint, and the reaction is stopped when the product purity of the reaction liquid is not increased any more; after the reaction is finished, filtering, carrying out reduced pressure distillation to recover cyclopentanone, glacial acetic acid and unreacted D-limonene, after the recovery is finished, adding methanol and n-heptane into kettle liquid, carrying out water extraction, washing and liquid separation, washing an organic phase with a sodium bicarbonate aqueous solution, carrying out reduced pressure distillation on the organic phase to recover n-heptane, and after the recovery is finished, obtaining a peach ketone crude product; and carrying out crude drawing and rectification on the peach ketone crude product to obtain a peach ketone finished product. The method has the advantages of mild reaction conditions, low safety risk and few three wastes, and can obtain a high-purity peach ketone finished product.

The application belongs to the field of fine chemical industry and provides a catalyst system and a continuous process for producing trimellitic anhydride, which comprises: a first-stage oxidation catalyst composed of 0.02-1% of cerium acetate and 0.5-5% of hydrogen peroxide; and a second-stage oxidation catalyst composed of 0.01-0.05% of copper acetate and 0.01-1% of manganese acetate. The application reduces the types and addition amount of catalysts, reduces the metal content in the product, and improves the yield of the product. Meanwhile, the application designs a continuous process flow, realizes continuous and efficient oxidation of trimethylbenzene, and realizes continuous production of rapid anhydride formation. Through continuous removal of acetic acid and water in the oxidation and anhydride formation processes, the reaction heat and product water are removed, the process is intensified, the forward reaction is promoted, and then the solvent acetic acid is reused through rectification separation. In addition, the continuous production process also solves the technical defect problems existing in the batch method.

The application belongs to the field of catalysis technology, and discloses a carbon sponge supported nanometer array monolithic catalyst, a preparation method and application thereof, and comprises the following steps: (1) preparing nitrogen-doped carbon sponge; (2) preparing a precursor solution: dissolving metal salt in water, then adding a precipitant to prepare the precursor solution; the metal salt is manganese acetate and metal nitrate, and the metal nitrate is rare earth metal nitrate and / or transition metal nitrate; (3) adding a template agent to the precursor solution, stirring until completely dissolved, adding nitrogen-doped carbon sponge, then performing hydrothermal reaction, cooling, washing, and drying to obtain the carbon sponge supported nanometer array monolithic catalyst. The preparation method is green and efficient, the denitration efficiency of the prepared catalyst can reach 100%, the catalyst has high sulfur and water resistance, and the waste catalyst is easy to handle.

The invention relates to the technical field of SCR denitration catalyst preparation, in particular to an environment-friendly strong-arsenic-resistance denitration catalyst and a preparation method thereof.The preparation method comprises the following steps that anatase type TiO2 or a commercial vanadium-titanium-based catalyst, KMnO4 and manganese acetate are evenly mixed and subjected to ball milling, and mixed powder is obtained; dissolving an auxiliary agent precursor salt in an organic solvent, adding the mixed powder, and violently stirring to obtain a mixed solution A; dissolving NaOH or KOH in an organic solvent, and slowly adding into the mixed solution A to obtain a mixed solution B; transferring the mixed solution B into a hydrothermal kettle for hydrothermal crystallization, cooling and centrifuging to obtain sediment, and washing and drying the sediment to obtain the environment-friendly strong arsenic-resistant denitration catalyst. The catalyst prepared by the method has the effects of wide active temperature window and excellent arsenic poisoning resistance.

The invention discloses a method for preparing manganese sulfate from sulfur-free low-grade rhodochrosite. The method comprises the following steps: by taking low-grade rhodochrosite as a raw material, grinding and pretreating the low-grade rhodochrosite, mixing the low-grade rhodochrosite with water, adding acetic acid, fully stirring, heating and leaching, and carrying out solid-liquid separation after the reaction is finished, so as to obtain a liquid-phase manganese acetate mother solution and solid-phase sulfur-free manganese slag; sulfuric acid is added into the manganese acetate mother liquor, heating and reduced pressure distillation are conducted, acetic acid is vaporized and then condensed and recycled for ore leaching, and manganese sulfate is crystallized and separated out in the heating process to serve as a product. Sulfuric acid is not in direct contact with manganese ore, the manganese slag does not contain sulfur, resource utilization is facilitated, and the treatment cost of the manganese slag can be remarkably reduced; and residual acid in the slag can be neutralized by lime water to stably exist, so that the risk of secondary pollution is avoided. The concentration of the acetic acid is not high, cyclic utilization is achieved in the method, the production cost is reduced through recycling of the acetic acid, the resource utilization rate is further increased, and the method is particularly suitable for the manganese extraction process of low-grade rhodochrosite.

The present invention discloses the preparation method of β-phosphonyl-enamine derivative. The preparation method comprising the following steps: dissolving the enamine derivative, organic phosphine compound, manganese acetate and potassium carbonate in the solvent, reacting at room temperature to obtain the β-phosphonyl-enamine derivative. The enamine derivative was as the starting material, and the raw materials are easy to obtain and a great many varieties. The various forms of the products obtained therein can be directly applied and can be used in further reactions. The reaction conditions are mild, the reaction speed is high, the reaction operation and the post-treatment process are simple, the production is convenient, and the method is suitable for large-scale production.

This invention discloses a baseball-shaped photocatalytic material, its preparation method, and its application, belonging to the field of photocatalytic ammonia synthesis technology. The baseball-shaped photocatalytic material comprises rod-shaped FeMOF and spherical MnMOF. The baseball-shaped photocatalytic material uses rod-shaped FeMOF as a substrate, with spherical MnMOF grown on top of the rod-shaped FeMOF. The spherical MnMOF contains acetate ions. The preparation method involves dissolving an iron source and a manganese source in a solvent, adding an organic ligand, and ultrasonically treating the mixture, followed by a hydrothermal reaction. The manganese source is manganese acetate tetrahydrate. This invention's baseball-shaped photocatalytic material, through the uniform growth of spherical MnMOF on rod-shaped FeMOF, forms an electron-hole conversion channel, thereby enhancing the electron-hole transport rate, improving the photocatalytic performance of the bimetallic organic framework structure, and significantly increasing the yield of photocatalytic ammonia synthesis.

The invention discloses a method for removing trimethylamine through catalysis of a manganous-manganic oxide catalyst, and belongs to the technical field of atmospheric pollution control in environmental chemical engineering. The preparation method comprises the following steps: dissolving manganese acetate tetrahydrate in a mixed solution of ethylene glycol and water, heating, then adding a Na2CO3 solution in a nitrogen atmosphere, stirring for reaction, and then washing, drying and calcining to obtain a spherical manganous-manganic oxide catalyst; and finally, in a nitrogen atmosphere containing trimethylamine and oxygen, realizing catalytic removal of the trimethylamine by the spherical manganous-manganic oxide catalyst at 50-250 DEG C. By controlling the morphology of the manganous-manganic oxide catalyst, the obtained spherical manganous-manganic oxide catalyst can completely catalyze and decompose trimethylamine at a relatively low temperature (175 DEG C), and the spherical manganous-manganic oxide catalyst does not have an obvious inactivation phenomenon when the degradation reaction of the spherical manganous-manganic oxide catalyst on the trimethylamine is performed for 45 hours. When the trimethylamine is catalytically removed by the manganous-manganic oxide catalyst, the spherical manganous-manganic oxide catalyst has excellent nitrogen and carbon dioxide selectivity.

The invention discloses a preparation method of spherical manganous-manganic oxide particles for well drilling or well cementation, which is characterized in that manganese nitrate and manganese acetate are compounded to realize the coupling of rapid oxidation and mild decomposition, effectively inhibit shell burst and hollow structure and improve the density and integrity of the particles; the introduced polyvinyl alcohol and citric acid can make the fog drop drying process more stable, and the problems of carbon residues and impure phases caused by a traditional surfactant are avoided. Furthermore, a three-stage spray pyrolysis method is adopted, stable evaporation, rapid phase formation and low-temperature curing of the solvent are achieved, and the problems of agglomeration, secondary sintering and insufficient crystal form development in the prior art are solved. The prepared spherical manganous-manganic oxide particles are concentrated in particle size, high in density and good in sphericity degree, can effectively reduce the viscosity of cement paste and reduce the settlement risk, have excellent suspension stability and flowability, are suitable for weighting requirements of high-density oil well cement paste and drilling fluid, and have wide application prospects in oil and gas drilling and well cementation.

The application discloses a kind of low-defect manganese-based prussian blue under solid-liquid dynamic balance fast preparation method, comprising the following steps: S1, sodium citrate is dissolved in deionized water, then add manganese acetate and ascorbic acid, form the solution A containing manganese complex;Wherein, the molar ratio of sodium citrate, manganese acetate and ascorbic acid is (4.5-5.5): 1:(0.3-0.4);S2, sodium ferrocyanide is added to deionized water, stirring is formed at a set temperature containing unsolved sodium ferrocyanide solid supersaturated suspension B;Wherein, the addition amount of sodium ferrocyanide is far more than its saturated solubility at the temperature, so that the system maintains solid-liquid two-phase equilibrium state;Crystalline integrity is higher: thanks to "whole process dynamic saturation" environment, the manganese-based prussian blue prepared by the application has more obvious monoclinic phase characteristics (corresponding XRD double peak is obvious, intensity is obvious, signal-to-noise ratio is good) compared with comparative document, lattice vacancy and coordination water content are significantly lower than comparative document scheme, and electronic conductivity is increased by nearly 50%.

The invention discloses a novel sacrificial catalyst for medium-high temperature H2S removal and short-chain alkane catalytic oxidation as well as a preparation method and application of the novel sacrificial catalyst. The catalyst is prepared by a hydrothermal method and comprises the following specific steps: dissolving manganese acetate in deionized water, and sequentially adding concentrated nitric acid, potassium permanganate and cerous nitrate according to a certain proportion; after uniformly mixing, transferring the precursor solution into a hydrothermal kettle, and carrying out crystallization reaction; and washing, drying, grinding and calcining the obtained precipitate to finally obtain the composite metal oxide catalyst. According to the present invention, under the medium-high temperature environment of 250-500 DEG C, the complete removal of H2S can be achieved, the H2S is not released in the form of SO2, and the poisoning effect of H2S on the post-catalyst is delayed; meanwhile, the sacrificial agent also has a short-chain alkane catalytic oxidation function, and shows good catalytic activity to ethane.

The application discloses a synthesis method of a lithium nickel manganese oxide positive electrode material and relates to the technical field of lithium ion battery materials, aiming at solving the problems of complex post-treatment after using nitrate raw materials, poor product morphology after spraying acetate raw materials and influence on performance; the method comprises the following steps: dissolving nickel acetate, manganese acetate and ammonium nitrate in deionized water to obtain a mixed solution; the mixed solution is spray dried to prepare mixed acetate of nickel and manganese; the mixed acetate is heat-treated in an oxygen atmosphere to obtain a nickel manganese oxide precursor; the nickel manganese oxide precursor is mixed with a lithium salt and then heat-treated in an oxygen atmosphere to obtain the lithium nickel manganese oxide positive electrode material; the spray drying method is adopted to prepare the precursor, thus avoiding the disadvantages of uneven precipitation and complex post-treatment of the reaction solution in the coprecipitation method, and the acetate is adopted to replace the nitrate, thus avoiding the complex post-treatment; in addition, the added ammonium nitrate can solve the problem of poor product morphology caused by the acetate raw material.

The invention relates to the technical field of hard carbon negative electrode materials, in particular to a hard carbon negative electrode material and a preparation method and application thereof. The hard carbon negative electrode material is prepared by carbonizing fluorine-doped porous hard carbon nanospheres adsorbed by manganese acetate, the fluorine-doped porous hard carbon nanospheres are prepared by carbonizing a precursor which is prepared from double-bond siloxane, a fluorine-containing acrylic monomer and methacryloyloxypropyl heptaisobutyl POSS (Polyhedral Oligomeric Silsesquioxane). The preparation method of the hard carbon negative electrode material comprises the following steps: S1, dissolving manganese acetate in an ethanol solvent, then adding fluorine-doped porous hard carbon nanospheres, mixing and stirring, and drying to obtain a negative electrode material precursor; and S2, in a nitrogen atmosphere, heating the negative electrode material precursor to 300-400 DEG C, keeping the temperature constant for 2-3 hours, then heating to 500-600 DEG C, keeping the temperature constant for 4-6 hours, and finally cooling to room temperature to obtain the hard carbon negative electrode material. The hard carbon negative electrode material provided by the invention has relatively high first coulombic efficiency.

This invention discloses a method for synthesizing Mn using a solvothermal method. 0.43 Cd 0.57 This invention relates to a method for producing S / Cu2MoS4 photocatalysts, belonging to the field of catalyst technology. First, copper molybdenum sulfide is prepared using cuprous oxide as a template. A solvothermal method is then used to synthesize copper molybdenum sulfide with high purity and good crystallinity. Next, manganese cadmium sulfide is prepared using manganese acetate, cadmium acetate, sodium hydroxide, and thioacetamide as raw materials. Before the hydrothermal reaction, copper molybdenum sulfide is added, and manganese cadmium sulfide is successfully modified by constructing a heterojunction, thus synthesizing Mn. 0.43 Cd 0.57 The S / Cu2MoS4 photocatalyst improved the photocatalytic hydrogen production rate of manganese cadmium sulfide. Furthermore, the Mn prepared in this invention... 0.43 Cd 0.57 The S / Cu2MoS4 photocatalyst can produce hydrogen at a rate of 8233 μmol / (g·h), which is 2.08 times that of pure manganese cadmium sulfide and 1.24 times that of manganese cadmium sulfide loaded with 1% platinum.

The invention discloses a preparation method of a ruthenium-manganese alloy catalytic material, which comprises the following steps: adding ruthenium chloride, manganese acetate and cetyltrimethylammonium bromide into a polyacrylonitrile solution with the mass fraction of 10-12% (the solvent is N, N-dimethylformamide), the mass ratio of ruthenium chloride to polyacrylonitrile is 1: 15, and the mass ratio of manganese acetate to ruthenium chloride is (1-5): 1; the self-supporting RuMn alloy catalyst (C (at) RuMn / CNFs) is prepared by utilizing electrostatic spinning and high-temperature carbonization, and the RuMn alloy particles are wrapped by a plurality of carbon layers, so that the method has the advantages of no need of adopting a binder, no covering of catalytic active sites and no shedding of the RuMn catalyst.

The invention discloses a graphene self-supporting intercalation sodium ferric manganese phosphate pyrophosphate positive electrode material and application, and a preparation method of the positive electrode material comprises the following steps: dissolving a soluble raw material in deionized water to prepare a precursor solution; the soluble raw materials comprise sodium acetate, manganese acetate and ferrous dihydrogen phosphate or disodium hydrogen phosphate, manganous dihydrogen phosphate and ferrous acetate; a carbon source and graphene are added into the precursor solution, or a dispersing agent is added, stirring and sanding are performed to obtain positive electrode slurry, the carbon source comprises one or two of starch, glucose and cane sugar, and polymeric monomers of the dispersing agent comprise ethyl 3-(trifluoromethyl) crotonate, 1, 4-dicyano-2-butene and styrene; and carrying out spray drying and briquetting on the positive electrode slurry, calcining for 10-18 hours at 500-700 DEG C under the protection of nitrogen, and crushing to obtain the positive electrode material with the particle size of 1-6 microns. The material has excellent conductivity and rate performance, is suitable for the sodium ion battery, and promotes the performance breakthrough and industrialization of the positive electrode material of the sodium ion battery.

The invention provides a lignin-based Mn3O4 composite carbon nanofiber film and a preparation method and application thereof, and belongs to the technical field of carbon nanofiber materials, and the preparation method comprises the following steps: extracting lignin from rice straw; preparing a spinning solution containing lignin, polyacrylonitrile and manganese acetate; preparing the spinning solution into a composite fiber membrane through electrostatic spinning; and carrying out pre-oxidation and carbonization on the composite fiber film to obtain the lignin-based Mn3O4 composite carbon nanofiber film. Renewable resources of rice straw are used as raw materials, so that the production cost is reduced; the electrostatic spinning process is simple and efficient, and large-scale production can be realized; the lignin-based Mn3O4 composite carbon nanofiber thin film prepared by the method does not need to add a binder, has good flexibility and mechanical strength, can be directly used as an electrode, can be used for constructing a light, bendable and portable supercapacitor device, meets the development requirements of wearable electronic devices, and has wide application prospects. Wide application prospects and commercial values are realized in the field of energy storage.