319 results about "Potassium permanganate" patented technology

The invention belongs to the technical field of denitration catalyst preparation, and discloses a meerscham-TiO2 composite carrier loaded manganese cerium medium and low temperature denitration catalyst and a preparation method and application thereof, the preparation method comprises the following steps: (1) mixing meerschaum and nitric acid, then heating and stirring for reaction, then carrying out suction filtration and washing, and drying to obtain a meerschaum-TiO2 composite carrier loaded manganese cerium medium and low temperature denitration catalyst; after the treated sepiolite is drained, drying and screening are conducted, and nitric acid acidified sepiolite is obtained; and (2) mixing the meerschaum acidified by nitric acid and TiO2, then adding the manganese source precursor solution into the acidified meerscham-TiO2, then dipping and stirring, dropwise adding a potassium permanganate solution into the solution, then adding a cerium nitrate solution, stirring and then carrying out suction filtration, drying, grinding and screening the obtained filter cake, and then calcining to obtain the catalyst. According to the invention, the acidified sepiolite and TiO2 are compounded, so that complementary advantages of the two carrier materials are realized, and the obtained catalyst not only has good denitration efficiency, but also can significantly reduce the production cost.

The invention discloses a metal element doped MnO2 and MnFe oxide composite catalyst as well as a preparation method and application thereof, and belongs to the technical field of flue gas desulfurization and denitrification. The preparation method comprises the following steps: dissolving potassium permanganate, divalent manganese salt and doped metal salt in water for reaction to prepare metal element doped MnO2; and mixing and reacting with a template agent, ferric salt and sodium salt, drying and roasting to obtain the final catalyst. The MnO2 electronic structure is modulated by doping metal elements, and the three-dimensional porous structure of the MnFe oxide is constructed by using the template agent, so that the catalyst has efficient adsorption and strong catalytic oxidation capacity, NO and SO2 can be synergistically removed at the same time, and the catalyst has desulfurization and denitrification activity in a wide temperature range of 30-300 DEG C, and is suitable for industrial production. And liquid ammonia does not need to be used in the purification process, so that the purification agent is high in safety and is particularly suitable for purification treatment under complex flue gas conditions in the non-electric industry.

The application discloses a preparation method of a manganese residue-based catalyst and application thereof, and belongs to the technical field of solid waste treatment. The application comprises the following steps: manganese residue is added into water and uniformly mixed to obtain a manganese residue turbid liquid; a soluble manganese salt solution and a potassium permanganate solution are mixed, and then added into the manganese residue turbid liquid to perform a hydrothermal reaction; and after washing and drying, a manganese residue-based catalyst is obtained. The catalyst prepared by using the manganese residue as a main raw material can efficiently degrade common organic wastewater, and the purpose of "waste treatment by waste" is achieved. In addition, the raw material manganese residue and the modifier are cheap and easy to obtain, the preparation method is simple, the production cost is low, and the application is beneficial to industrial popularization and use.

The invention provides a preparation method of an acoustic / photosensitizer-manganese dioxide nanoparticle and a product thereof. According to the method, firstly, a potassium permanganate reduction method is adopted to precisely synthesize the high-purity MnO2 nano-substrate, and according to the method, the size uniformity and dispersion stability of nano-particles can be precisely controlled by regulating and controlling the pH value and temperature of a reaction system and the concentration of a reducing agent. On the basis, amphiphilic high-molecular polyethylene glycol-polycaprolactone (PEG-PCL) is modified on the surface of the MnO2 nanometre. The whole preparation process is green and mild, and complex equipment is not needed; the reaction conditions are mild, nanoparticles are uniform, and the acoustic / photosensitizer can be combined and applied to an imaging technology to realize real-time monitoring.

The invention relates to the technical field of metallurgy, discloses a composite bentonite core material for metallurgical pellets as well as preparation and application of the composite bentonite core material, and aims to solve the technical bottlenecks that the TFe grade is low and the SiO2 content is high due to a large amount of bentonite in existing pellet production, and titanium-containing and high-sulfur fine iron powder pellets are easy to burst and insufficient in strength. The core material is formed by compounding 60% of corn gelatinized starch, 20% of sodium humate, 10% of lignosulfonate and 10% of macromolecular copolymer, and 2%-3% of borax or 2%-3% of polyacrylamide is added for titanium-containing iron fine powder for optimization; 3%-4% of potassium permanganate is added for optimization aiming at the high-sulfur iron fine powder. According to the composite bentonite, the compressive strength of finished product balls can be improved by 20%-30%, the ball cracking rate is reduced by 90% or above, the TFe grade is improved by 0.3%-1.3%, the multiple purposes of reducing the dosage, improving the grade and adapting to special fine powder are creatively achieved, and the composite bentonite has remarkable technical and economic values.

The invention discloses road and bridge anti-heavy load concrete and a preparation method thereof, relates to the technical field of concrete technology, and belongs to the patent classification number C04B28 / 00. The preparation method of the concrete comprises the following steps: firstly, impregnating and activating polypropylene fibers with a potassium permanganate acid solution, then treating with aminopropyltriethoxysilane to obtain interface modified fibers, preparing a suspension from the interface modified fibers, mixing with a premixed solution of nano silicon dioxide containing a water-borne epoxy resin emulsion, and reacting to obtain a fiber reinforced composite material; the preparation method comprises the following steps: mixing metakaolin and silica fume, adding waterborne polyurethane and carboxylated multi-walled carbon nanotubes, carrying out high-speed shearing, carrying out spray drying to obtain interface reinforced microspheres, carrying out dry mixing on cement, machine-made sand, granite gravel, mineral powder and a fiber reinforced material, adding a polycarboxylic acid water reducer solution, carrying out high-speed stirring, adding the microspheres, and carrying out medium-speed stirring to obtain the concrete. The concrete prepared by the invention has excellent mechanical strength, so that the heavy load resistance is realized.

The invention discloses a silicon carbide substrate rough polishing composition and a preparation method and application thereof, and belongs to the technical field of semiconductor device processing. The rough polishing composition for the silicon carbide substrate is a polishing composition obtained by adjusting the pH value of a basic system to 3-4 by using a pH regulator; the basic system comprises the following components in percentage by mass: 2-10% of an abrasive, 2-6% of a first oxidant, 2-10% of a second oxidant and 0.5-2% of a dispersing agent besides water; the first oxidant is potassium permanganate; the second oxidizing agent is potassium persulfate or ferric persulfate. According to the method, the combination of potassium permanganate and persulfate is used as an oxidizing agent, and the rough polishing efficiency and uniformity of silicon carbide are remarkably improved through oxidation potential complementation, acidic environment synergy, free radical catalysis chain reaction and surface wettability optimization.

This invention provides a temperature-resistant shape memory polymer plugging agent, its preparation method, and its application, belonging to the field of oil and gas drilling technology. The preparation method of this plugging agent includes the following steps: mixing acetic acid and perchloric acid to obtain a mixed acid, then adding bromate, potassium permanganate, and natural flake graphite, and stirring to obtain low-temperature expanded graphite; mixing cyanate ester, linear aliphatic epoxy resin, and an active diluent, then adding low-temperature expanded graphite, organotin compounds, and amine catalysts, and carrying out a curing reaction to obtain a temperature-resistant shape memory polymer material; testing the glass transition temperature (Tg) of the synthesized temperature-resistant shape memory polymer material, compressing it at (Tg+5)~(Tg+10)℃, and then cooling, pulverizing, and granulating to obtain the final product. The plugging agent of this invention can rapidly recover its original shape at high temperatures, accumulate and seal leakage channels, and form a high-strength sealing layer in fractures, meeting the requirements of safe and efficient drilling.

The invention discloses a purple phosphorus-manganese dioxide nano-composite enzyme as well as a preparation method and application thereof, and belongs to the technical field of biological medicines. The purple phosphorus-manganese dioxide nano-composite enzyme is formed by compounding a purple phosphorus nanosheet and nano-manganese dioxide through in-situ mineralization, and the surface of the purple phosphorus-manganese dioxide nano-composite enzyme is modified with methoxy polyethylene glycol amine. The preparation method comprises the following steps: preparing a purple phosphorus nanosheet material through ultrasonic liquid phase stripping; and at room temperature, dropwise adding a potassium permanganate aqueous solution into the purple phosphorus nanosheet material aqueous solution, then adding a methoxy polyethylene glycol amine aqueous solution, stirring overnight, and centrifugally collecting precipitate to obtain the purple phosphorus-manganese dioxide nano compound enzyme. The purple phosphorus-manganese dioxide nano-composite enzyme provided by the invention is composed of a manganese dioxide nano-material with self-enhanced chemical kinetic catalytic performance and a purple phosphorus nanosheet with near-infrared photothermal conversion performance, and the effect of killing tumor cells under NIR-II synergistic chemical kinetic catalysis can be realized.

The present application belongs to the technical field of waste oil recycling, and particularly relates to a method for recycling and processing by-products of edible vegetable oil processing, comprising the following steps: S1, mixing raw materials with deionized water and potassium permanganate, wherein the raw materials comprise soapstock, oil foot and deodorized distillate; S2, performing gradient separation treatment on the mixed liquid obtained in step S1, wherein the gradient separation treatment comprises centrifugal separation, mixed solvent extraction and ultrasonic-assisted separation; and S3, recycling oil and fat products and solid products obtained in step S2. The present application realizes the collaborative treatment of multiple types of by-products, the comprehensive recovery rate of oil and fat reaches more than 85%, the energy consumption is reduced by 35%, the use of strong acid and strong base is avoided, it is green and environmentally friendly, the operation is simple, and it is suitable for industrial application.

The invention discloses a method for removing diatom through combination of pre-oxidation of sodium hypochlorite and potassium permanganate and coagulative precipitation enhancement, and belongs to the technical field of water treatment. The method comprises the following steps: adding sodium hypochlorite and potassium permanganate into diatom-containing water step by step, and carrying out a combined pre-oxidation reaction for 30-60 minutes; and then adding a coagulant to react, and standing and precipitating for about 60 minutes, so that the diatom cells in the water can be efficiently removed. Aiming at the problems of low diatom oxidation removal rate, poor coagulation effect, filter tank blockage and the like in a conventional water treatment process, straight-chain diatom cell membrane structures are primarily destroyed through sodium hypochlorite, negative electricity groups on cell surfaces are exposed, and a favorable reaction interface is provided for potassium permanganate; in-situ manganese dioxide generated by further adding potassium permanganate can coat cells and neutralize surface charges, and an ideal condition is created for the coagulant to form an adsorption bridge, so that a coagulation interface is remarkably improved, and the removal efficiency of diatom cells is improved.

The present application relates to the field of medicine synthesis, and discloses a preparation method and application of brominated piperonal carboxylic acid, wherein the brominated piperonal carboxylic acid compound is prepared from o-vanillin as a starting material through acetyl protection, bromination reaction, deprotection and demethylation reaction, cyclization reaction and Pinnick oxidation reaction.No longer through a brominated piperonal intermediate, and without using a live LDA reagent low-temperature lithiation reaction, the safety and stability are greatly improved.The deprotection and demethylation reaction is carried out in one pot, and the use of boron tribromide and other reagents is avoided;finally, the oxidation step from aldehyde to acid avoids using traditional silver oxide or potassium permanganate oxidation, and adopts Pinnick oxidation, which is economic, environmental protection and cost reduction, and greatly improves the yield.The whole has the advantages of easy-to-obtain raw materials, short steps, mild reaction conditions, low production cost, environmental protection, high yield and high purity, and can meet the high quality requirements of pharmaceutical products.

The invention relates to the technical field of agricultural cultivation, in particular to a breeding method of water horn seeds. The method comprises the following steps: storing dried water chestnut seeds at 8-16 DEG C for 8-24 days, and soaking the water chestnut seeds in a potassium permanganate aqueous solution for 15-25 minutes; and sowing the soaked water horns seeds in a matrix, and culturing for 18-22 days to obtain seed seedlings. According to the method provided by the invention, the germination rate of the water pod seeds is extremely high and reaches 99%; and the method is short in operation period and simple in operation steps, does not need any plant hormones and chemical substances, effectively solves the breeding problem of the water hormones, and has important significance for reducing the endangered degree of the water hormones.

Composition, characterized in that: —it comprises, in a solution of demineralized water: between 10 and 80, preferably between 15 and 20, more preferably 17, g / l of a composition of phosphoric acid H3PO4, and between 2 and 15, preferably between 4 and 8, more preferably 6, g / l of a composition of potassium permanganate KMnO4, —the weight ratio H3PO4 / KMnO4 is between 1.5 and 10, preferably between 1.8 and 5, mote preferably equal to 2.8, —said composition has a pH between 2.4 and 3, preferably 2.5.

The invention discloses a method for testing the content of trivalent metal elements in a metal oxide, and belongs to the technical field of chemical analysis. The method comprises the following steps: firstly, reducing trivalent metal elements in a sample into divalent metal elements by using a reducing agent ammonium ferrous sulfate in a strong acid environment, wherein unreacted ammonium ferrous sulfate remains in a system; then, potassium permanganate is adopted for titration of unreacted ammonium ferrous sulfate, the end point is based on the fact that the solution becomes light pink and keeps color fastness for 15 seconds, and meanwhile a blank solution is set to eliminate system background interference; by comparing the difference between the blank titration volume and the sample titration volume and combining the titration concentration and the sample mass, the content of the trivalent metal elements in the sample can be accurately calculated. The method has the advantages of simplicity and convenience in operation, strong anti-interference capability, high detection precision and wide application range, is suitable for various metal oxide material systems, and is particularly suitable for quality control and performance analysis of new energy materials and catalysts.

The utility model discloses a mobile groundwater pollution control device which comprises a base, two universal wheels are installed on the left portion and the right portion of the lower end of the base respectively, a storage device is installed on the front portion of the upper end of the base, a water storage tank is installed on the left portion of the upper end of the base, and a first water pump is installed on the right portion of the upper end of the water storage tank. The mixing kettle is installed on the right portion of the upper end of the base, the connecting pipe is jointly installed at the upper ends of the mixing kettle and the first water pump, the stirring device is installed in the middle of the upper end of the mixing kettle, the heating device is installed on the lower portion of the right end of the mixing kettle, and the adding opening is formed in the right portion of the upper end of the mixing kettle. According to the movable underground water pollution prevention and control device, the servo motor drives the connecting column, the connecting column further drives the stirring column and the stirring shaft to rotate along with the connecting column, potassium permanganate is stirred, and the heater is matched to drive the heating pipe to heat water in the kettle body. Therefore, the mixing efficiency of potassium permanganate is improved.

The present application relates to the technical field of wastewater treatment, and specifically discloses a method for recycling fluorine from copper smelting flue gas, which comprises the following steps: adding water glass with a certain concentration into flue gas scrubbing liquid in a certain proportion, obtaining waste acid original solution by power wave scrubber, adding potassium permanganate into the waste acid original solution, obtaining transformation slag and post-transformation liquid, adding water and alkaline compounds into the transformation slag for hydrolysis, obtaining neutralization liquid, adding oxidizing agent and reducing agent into the neutralization liquid, obtaining purification slag and post-purification liquid, obtaining crude potassium fluoride crystal by concentrating and crystallizing the post-purification liquid, and obtaining refined potassium fluoride crystal and post-recrystallization liquid by recrystallizing the crude potassium fluoride crystal. The method can recycle most of the fluorine-containing pollutants in the copper smelting flue gas, and convert them into potassium fluoride, an important industrial product, which not only solves the corrosion of fluorine to process equipment and the pollution to the environment, but also greatly improves the economic benefits of enterprises.

The application belongs to the technical field of catalyst preparation, and particularly discloses a Cu 2‑x The application discloses a preparation method and application of an S / carbon / MnO2 / attapulgite composite catalyst. Attapulgite is used as a carrier, and is reacted with thiophene and potassium permanganate to uniformly load flaky manganese dioxide on the attapulgite carrier, and simultaneously, the thiophene is oxidized into a polymer to prepare polythiophene / MnO2 / attapulgite. A copper source is added, and complexation and coordination occur between sulfur atoms (S) in the thiophene and copper ions (Cu 2+ ), so that the copper ions are adsorbed in situ to the surface of the polythiophene / MnO2 / attapulgite composite, and Cu 2‑x S / carbon / MnO2 / attapulgite is prepared by pyrolysis. The prepared catalyst has both thermal catalysis function and plasmonic photothermal effect, greatly reduces the reaction temperature when the catalyst catalyzes and oxidizes VOCs, and realizes the purpose of coupling and catalyzing and oxidizing VOCs under low-temperature conditions.

The invention belongs to the technical field of graphite materials and particularly relates to a preparation method and application of flexible graphite. The preparation method of the flexible graphite comprises the following steps: S1, adding graphite and potassium permanganate into a reaction container at room temperature, dropwise adding a mixed solution of phosphoric acid and an ionic liquid while ultrasonicating, the ultrasonic power being 130-140 W and the ultrasonic temperature being 30-40° C., continuing ultrasonicating for 2-3 hours after the dropwise addition is completed, washing until neutral, and drying to obtain expandable graphite; S2, adding the expandable graphite obtained in step S1 into an impregnation solution and soaking for 15-20 minutes, filtering, and drying to obtain modified expandable graphite; and S3, expanding the modified expandable graphite obtained in step S2 at 920-960° C. to obtain graphite worms, cooling the graphite worms and pressing them at 85-95° C. and 19-21 MPa for 130-170 seconds to obtain flexible graphite. The flexible graphite prepared by the preparation method of the present invention has good expansion property, excellent compressibility, resilience and high temperature resistance, and good tensile strength.

The present application relates to the technical field of graphite material, and provides a method for preparing high-expansion-volume expanded graphite by activation or pretreatment. In the method, natural flake graphite, potassium permanganate, concentrated sulfuric acid and an activating agent are mixed to perform an oxidation intercalation reaction, and then high-expansion-volume expanded graphite is obtained by high-temperature expansion. Alternatively, in the method, natural flake graphite is pretreated by a pretreatment agent, and then an oxidation intercalation reaction and high-temperature expansion are performed to obtain high-expansion-volume expanded graphite. By activation or pretreatment, the method can improve the expansion volume of expanded graphite. In particular, when the pretreatment method is used, the method can prepare expanded graphite with significantly increased expansion volume on the basis of reduced use of oxidizing agent and intercalating agent, and the expansion effect is more significant.

The application relates to a chromium ion form analysis method based on electrochemical and Raman bimodal detection signals. Au-Ag Janus NPs solution is added dropwise on the surface of a glassy carbon electrode, the DPV signal value and the Raman signal value of a to-be-detected solution containing Cr 6+ and Cr 3+ are detected, the concentration of Cr 6+ in the to-be-detected solution is obtained, Cr 6+ in the to-be-detected solution containing Cr 3+ and Cr 3+ is oxidized into Cr 6+ under the conditions of strong alkalinity and heating by using potassium permanganate, then a reducing agent is added to obtain a mixed solution, the concentration of Cr 6+ in the mixed solution is detected through the DPV signal value and the Raman signal value, Cr 3+ is completely converted into Cr 6+ , the total chromium concentration is measured, finally the concentration of Cr 3+ is obtained by subtraction, and finally the chromium ion form analysis is realized. The method improves the accuracy and efficiency of Cr ion form detection, and is suitable for rapid analysis of Cr ion forms in environment and biological samples.

The invention relates to the technical field of medical and chemical medicines, in particular to a novel synthesis method of L (-)-threo-3-hydroxyaspartic acid hydrochloride. The preparation method comprises the following steps: by taking cheap and easily available D-phenylglycinol as an initial raw material, firstly protecting amino with Boc anhydride, then oxidizing to obtain N-BOC-D-phenylalanine aldehyde 3, then carrying out Grignard reaction on the N-BOC-D-phenylalanine aldehyde 3 and vinyl magnesium bromide at low temperature to obtain corresponding o-amino alcohol, then reacting the o-amino alcohol with 2, 2-dimethoxypropane at 0 DEG C under the catalytic action of p-toluenesulfonic acid, and finally obtaining the 2, 2-dimethoxypropane. The obtained compound 4 is subjected to Upjohn dihydroxylation reaction and sodium periodate oxidation to obtain corresponding aldehyde, and then the aldehyde is oxidized by potassium permanganate under a weak acidic condition to obtain corresponding carboxylic acid 5. Oxidizing a benzene ring by taking ruthenium trichloride as a catalyst and sodium periodate as a co-oxidant to obtain dicarboxylic acid; and finally, refluxing and deprotecting by using hydrochloric acid to obtain the L (-)-chloro-3-hydroxyaspartic acid hydrochloride.

The invention provides nickel modified manganese dioxide as well as a preparation method and application thereof. The preparation method of the nickel modified manganese dioxide comprises the following steps: S1, providing potassium permanganate, a reducing agent and nickel salt; s2, mixing the potassium permanganate, the reducing agent and the nickel salt in a water body to obtain a pretreatment solution; the molar ratio of the potassium permanganate to the reducing agent is (1-3): (0.6-2), and the molar ratio of the potassium permanganate to the nickel salt is (6-30): 1; s3, carrying out hydrothermal treatment on the pretreatment liquid to obtain a reaction liquid; the temperature of the hydrothermal treatment is 130-200 DEG C, and the duration of the hydrothermal treatment is 5-12 hours; and S4, carrying out solid-liquid separation treatment on the reaction liquid to obtain the nickel modified manganese dioxide. Nickel modification is carried out based on potassium permanganate and divalent manganese salt, exposure of the 110 crystal face is controlled, and the thallium removal rate of the manganese dioxide material can be increased.

The invention discloses a waste graphite material recovery method, which comprises: 1, mixing concentrated sulfuric acid and sodium nitrate under a first reaction condition, uniformly stirring, sequentially adding a waste graphite material and potassium permanganate, and uniformly stirring to obtain a solution A; 2, stirring and diluting the solution A under a second reaction condition, a first reaction condition and a third reaction condition in sequence, and adding peroxide to obtain a solution B; 3, stirring the solution B under a first reaction condition, performing suction filtration, and sequentially performing acid pickling and drying on filter residues to obtain a graphene oxide material; and 4, heating the graphene oxide material in inert gas, and cooling to room temperature to obtain the recycled reproduced graphene. Compared with the prior art, according to the recycling method, the improved Hummers method is adopted for recycling the waste graphite material, impurities are removed, the prepared graphene oxide has larger interlayer spacing and richer oxygen-containing functional groups, meanwhile, efficient recycling of resources is achieved, the regenerated graphene can be used as a battery conductive agent, and the resource utilization efficiency is remarkably improved.

This invention belongs to the field of catalyst technology, and relates to a flower-like multifunctional CuO@MnO2 composite material, its preparation method, and its application. The composite material constructs a flower-like core-shell structure with CuO as the core and thin-film MnO2 as the shell. The preparation method is as follows: rod-shaped copper hydroxide is added to deionized water and ultrasonically mixed to obtain a copper hydroxide suspension; potassium permanganate is dissolved in the copper hydroxide suspension and ultrasonically mixed to obtain a mixed solution B; mixed solution B is subjected to a hydrothermal reaction, and after the reaction is completed, it is cooled, washed, and dried to obtain the flower-like multifunctional CuO@MnO2 composite material. This method not only maximizes the interfacial contact area between the two phases and promotes interfacial charge transfer to achieve a synergistic catalytic effect, but also provides a MnO2 shell with good stability, forming a physical and chemical barrier for the CuO core and effectively inhibiting the excessive leaching of copper ions. Furthermore, the prepared CuO@MnO2 exhibits good catalytic performance, stability, and reproducibility.

The application provides a kind of plasma-based manganese dioxide electrode material, preparation method and application;The preparation method comprises the following steps: S1, obtaining the mixed solution containing potassium permanganate and reducing agent;S2, the mixed solution is hydrothermally treated, and the product of the hydrothermal treatment is solid-liquid separated, to obtain an intermediate material;The temperature of the hydrothermal treatment is 90-145 DEG C, and the duration of the hydrothermal treatment is 6-24h;S3, the intermediate material is subjected to plasma treatment, to obtain a manganese dioxide electrode material;The gas source of the plasma treatment is inert gas.The application can reduce the manganese dissolution rate on the basis of ensuring the thallium removal rate, thereby improving the cycle performance of the electrode material.

The invention provides a fly ash fiber and a preparation method thereof, and belongs to the technical field of fly ash, the preparation method specifically comprises the following steps: firstly, mixing a fly ash raw material with a composite oxidant and a dispersant, the composite oxidant comprises a main oxidant and an auxiliary oxidant, the main oxidant is potassium permanganate, and the auxiliary oxidant is sodium hydroxide; the auxiliary oxidant is manganese dioxide; carrying out ball milling treatment on the obtained mixture, and drying to remove the dispersing agent to obtain a homogenized mixture; then placing the mixture in an air atmosphere, heating to a first preset temperature and preserving heat for a first preset time, then heating to a second preset temperature and preserving heat for a second preset time to prepare clinker liquid, and then quenching the clinker liquid to obtain glassy clinker; and finally, drawing and forming the glassy clinker through a platinum-rhodium alloy bushing plate to obtain the fly ash fiber.

The invention belongs to the field of metal ion concentration detection, and particularly relates to a method for detecting the concentration of vanadium ions in a vanadium battery negative electrode electrolyte through two-step potentiometric titration. Aiming at the problems of inaccurate measurement result, large error and complicated operation of the existing vanadium battery negative electrode electrolyte, the vanadium ion concentration in the vanadium battery negative electrode electrolyte is detected by adopting two steps of potentiometric titration, the first titer is that the negative electrode electrolyte is added into a mixed acid solution containing excessive pentavalent vanadium and sulfur and phosphorus in an open system, and the second titer is equal to the first titer; 2-valent and 3-valent vanadium ions in the solution are all oxidized into 4-valent vanadium ions by pentavalent vanadium ions, meanwhile, part of pentavalent vanadium ions are reduced into 4-valent vanadium ions, and then potassium permanganate is used for titration of the concentration of the 4-valent vanadium ions in the solution so as to solve the problem of exposure oxidation of the 2-valent vanadium ions; in the second step of titration, potassium permanganate is directly used for titration of vanadium ion concentration in the negative electrode electrolyte. Results prove that the method is small in detection result deviation, high in precision and accuracy, portable in carried instrument and suitable for real-time monitoring of the energy storage power station.

The invention discloses a 1, 3-propane diamine intercalated potassium manganese oxide positive electrode material, a preparation method thereof and an application of the 1, 3-propane diamine intercalated potassium manganese oxide positive electrode material in an aqueous zinc ion battery, and belongs to the technical field of materials. The preparation method comprises the following steps: dissolving potassium permanganate and 1, 3-propane diamine in deionized water, stirring, adjusting the pH value of the solution, transferring the mixed solution into a stainless steel reaction kettle with a polytetrafluoroethylene lining, carrying out a hydrothermal reaction, cooling to room temperature, carrying out centrifugal cleaning, and carrying out vacuum drying to obtain the positive electrode material DP-KMO. DP-KMO is prepared through a simple one-step hydrothermal method, DP is inserted into the electrode material through further reaction, the introduction of DP not only enlarges the interlayer spacing of KMO, but also participates in the storage of zinc ions, increases the active sites of the KMO, effectively promotes the diffusion of ions and charge transfer, improves the conductivity of the material, reduces the internal resistance of the material, and improves the electrochemical performance of the material. And the structural flexibility and stability of the material are maintained, so that the overall performance of the water-based zinc ion battery is improved.

The invention relates to the technical field of biomedicine, in particular to a preparation method of sequential targeting mesoporous manganese oxide nano-enzyme and application of the sequential targeting mesoporous manganese oxide nano-enzyme in treatment of ischemia reperfusion induced acute kidney injury. Adding a potassium permanganate solution into the silicon dioxide nanoparticle dispersion liquid under ultrasonic waves, and carrying out alkali etching to obtain mesoporous manganese oxide nanoparticles (HMN); and after surface amination modification, connecting with a mixed PEG spacer layer, and reacting with thiolated SS31 and azidoacyl hyaluronic acid to obtain the nano-enzyme. The preparation can effectively penetrate through a damaged glomerulus filtration barrier and is passively enriched in a damaged kidney, damaged renal tubular epithelial cells over-express CD44 receptor mediated hyaluronic acid modified nano-particle endocytosis is enhanced, SS31 modified nano-particles achieve lysosome escape mitochondrial targeting in cells, the level of active oxygen in mitochondria can be reduced, and the activity of the mitochondria can be improved. The mitochondrial function is recovered, the renal function and tissue pathological injury are improved, and accurate anti-oxidation treatment on the acute kidney injury is realized.