242 results about "Ionic solution" patented technology

The invention discloses a vanadium-doped modified ferric sodium pyrophosphate material based on spray drying as well as a preparation method and application of the vanadium-doped modified ferric sodium pyrophosphate material. The material has a spherical porous morphology, and the particle size is 1-10 microns; the chemical formula is Na (4-x) Fe (3-x) Vx (PO4) 2P2O7, wherein x is more than 0 and less than or equal to 0.1. The material is prepared by adopting a spray drying method, and atomic-scale mixing of vanadium and iron is ensured through a uniform and stable complexing ion solution; and the formation of porous spherical morphology is promoted through the volatilization of the acidic base solution in the rapid drying process. A spray drying method and a trace vanadium doping technology are combined, so that more active sodium sites in the ferric sodium phosphate pyrophosphate positive electrode material can be activated, the reversible de-intercalation sodium capacity can be improved, sodium ion diffusion can be promoted, the polarization voltage can be reduced, and the cycling stability of the material can be improved.

The invention relates to the field of water quality detection, in particular to a method, system and equipment for detecting solution impurities through a water quality detector and a medium. The method comprises the following steps: acquiring spectral data of a to-be-detected ion solution; a correction observation window is constructed on the spectral data according to the local concentration gradient and used for extracting local nonlinear features, and the local nonlinear features comprise absorbance gradient change features and fitting residual error anomaly features; establishing a mapping relation between the spectral data and a water quality detection result according to the local nonlinear characteristics in the correction observation window, and generating a correction coefficient through a scatter correction algorithm; correcting the spectral data according to the mapping relation and the correction coefficient; and identifying impurity components in the ion solution based on the corrected spectral data. The stable mapping relation between the absorbance and the impurity concentration can still be maintained in a strong ion interference environment, so that the measurement result can keep reliable precision even in a high-concentration ion intensity environment.

The invention provides a preparation method of n-p type ionic thermoelectric hydrogel based on a bi-crosslinked network structure. The preparation method comprises the following steps: (1) dissolving a binary hydrogel substrate in water according to a certain proportion; (2) adding a cross-linking agent; (3) dropwise adding the stirred solution into a mold, and carrying out curing molding and drying at a certain temperature; and (4) soaking the cured hydrogel in an n-type ion solution and a p-type ion solution with a certain concentration respectively, and after a period of time, assembling the hydrogel to obtain the n-p type ion thermoelectric hydrogel based on the double-crosslinked network structure. Different from thermoelectric hydrogel which only has a network structure and only uses one thermoelectric type, the technical scheme designs the thermoelectric hydrogel initiated by n-p type ions based on a double-crosslinking network structure, so that more efficient and more stable energy conversion and utilization can be realized; and a new solution is provided for the fields of flexible electronic equipment, low-grade heat energy recovery and the like.

The invention discloses a preparation method of a biodegradable material based on gamma-polyglutamic acid, which comprises the following steps: (1) preparing a low-molecular-weight polyglutamic acid aqueous solution, adjusting the pH value to be acidic to obtain a carboxylic acid group protonated polyglutamic acid solution, then adding a metal ion solution into the polyglutamic acid solution, and uniformly stirring and mixing to obtain a mixed solution; and (2) adjusting the pH value of the mixed solution obtained in the step (1) to be alkaline while stirring, then adding a cross-linking agent into the mixed solution, and carrying out cross-linking curing to obtain the biodegradable material. The material disclosed by the invention has mechanical properties, tensile strength, toughness and the like can be improved, so that the material can better meet the requirements of different application scenes, the application range of the material is widened, and meanwhile, the material has relatively good degradation performance, adsorption performance, antibacterial performance and moisture retention performance, can be produced by utilizing renewable resources, is wide in raw material source and sustainable, and is suitable for industrial production. The dependence on non-renewable resources such as petroleum is reduced.

The invention discloses a method for detecting cadmium ions and lead ions in a water body by utilizing a screen-printed electrode electrochemical sensor, which comprises the following steps of: constructing the screen-printed electrode electrochemical sensor by taking a screen-printed electrode of which the surface of a reaction end is modified with a ZIF-8 / MWCNT nano composite material as a working electrode; the method comprises the following steps: detecting the peak current change of a to-be-detected cadmium / lead ion solution by using a screen-printed electrode electrochemical sensor, and calculating the concentrations of cadmium ions and lead ions in the to-be-detected cadmium / lead ion solution by using a linear regression equation of the cadmium ion concentration, the lead ion concentration and the peak current change. The method provided by the invention has the advantages of simple operation, low cost, high detection efficiency, high detection accuracy and the like, can realize on-site detection of cadmium ions and lead ions in a water body, and has the advantages of convenient operation, high accuracy, strong anti-interference capability to interference factors, and good application prospect. The method is of great significance to efficient detection of heavy metal cadmium ions and lead ions in the water environment.

The invention relates to a manganese zinc ferrite composite magnetic catalyst and a preparation method thereof. The preparation method comprises the following steps: adding manganese nitrate, zinc nitrate and ferric nitrate into deionized water to form a metal ion solution; the preparation method comprises the following steps: adding ethylenediaminetetraacetic acid into a metal ion solution to form sol, performing heating dehydration treatment, grinding, and performing heat treatment to obtain manganese zinc ferrite nanoparticles; dissolving calcium nitrate, indium nitrate and thioacetamide in deionized water, then adding the manganese zinc ferrite nanoparticles to obtain a suspension of a reaction mixture, carrying out hydrothermal reaction, and carrying out subsequent extraction treatment to obtain the manganese zinc ferrite composite magnetic catalyst. The composite magnetic catalyst is prepared by utilizing a two-step hydrothermal method, the photocatalytic performance of the composite magnetic catalyst is remarkably improved, and the composite magnetic catalyst can be quickly and completely recycled through magnet adsorption, so that the photocatalytic performance of a single catalyst is improved, and quick recycling and cyclic utilization of the photocatalyst are realized; and the application cost of photocatalysis is reduced.

The invention belongs to the technical field of electrochemical energy storage and electrocatalysis, and provides a modified electrode for in-situ growth of copper sulfide, a preparation method of the modified electrode and a flow battery. The preparation method comprises the following steps: (1) doping sulfur atoms and fluorine atoms on a substrate material by adopting a plasma cleaning method to obtain a doped substrate; (2) spraying a copper ion solution on the doped substrate, fully wetting, spraying a sulfur ion solution on the surface of the wetted doped substrate, and reacting; and (3) cleaning and drying the doped substrate to obtain the modified electrode for in-situ growth of copper sulfide. The low-cost and high-performance modified electrode for in-situ growth of copper sulfide has the advantages of high conductivity, specific surface area, electrochemical activity, catalytic performance and stability, improvement of polysulfide redox reversibility and the like, and can be applied to a sulfur-based flow battery system taking polysulfide as an active substance.

The invention relates to the technical field of porcelain glaze, and discloses a preparation method for combining porcelain glaze of a carbon nano tube enhanced glass-lined reaction kettle, which comprises the following steps: firstly, preparing a carbon nano tube aqueous dispersion, slowly dropwise adding the carbon nano tube aqueous dispersion into a surfactant solution to obtain a positively charged carbon nano tube aqueous dispersion, adding glaze powder into a negative ion solution, and uniformly stirring to obtain the carbon nano tube enhanced glass-lined reaction kettle porcelain glaze. And fully mixing the glaze particles with negative charges to obtain glaze slip, carrying out centrifugal filtration to obtain preliminarily modified glaze particles, carrying out gradient pre-heating in an aerobic environment to obtain pre-calcined glaze particles, placing the pre-calcined glaze particles in calcination equipment, carrying out oxygen-isolated calcination, and in order to discharge pores in the sintered glaze particles, raising the temperature in the furnace again to enhance the fluidity of the glaze particles. The preparation method comprises the following steps: preparing a glaze block, preparing a vacuum environment by using a vacuum pump, recovering to a normal-pressure environment, stopping heating to obtain the glaze block with tightly combined inside, and finally grinding and crushing the glaze block in grinding equipment with the particle size capable of being adjusted according to downstream application requirements.

The invention relates to the technical field of ionic liquid cylinders, in particular to an ionic liquid seal compression cylinder assembly. An annular groove is formed in the edge of the top end of the piston, ionic liquid is arranged in the annular groove, and the ionic liquid inlet is connected with an ionic liquid circulating system; an isolation cavity is arranged between the piston and the cylinder body and is connected with an ionic liquid leakage detection system; an air valve liquid impact prevention structure is arranged in the front end cover; a top end buffering structure is arranged between the piston and the front end cover, and a bottom end buffering structure is arranged between the piston and the rear end cover. The use amount of the ionic liquid is greatly reduced, the cost of the whole compression cylinder is reduced, part of the ionic liquid exhausted along with gas can be recycled, consumption and waste of the ionic liquid are avoided, the pressure sensor is used for detecting a pressure signal in the isolation cavity and sending the pressure signal to the controller, a worker can stop and overhaul in time, equipment safety is ensured, and the working efficiency is improved. The air valve liquid impact prevention structure can reduce impact of ionic liquid on the air inlet valve and the exhaust valve, and the service life of the air inlet valve and the exhaust valve is guaranteed.

The invention discloses a silver particle modified and carbon coated lithium manganese iron phosphate positive electrode material and a preparation method thereof, and relates to the technical field of materials.The preparation method comprises the steps that a lithium source, an iron source, a manganese source and a phosphorus source are mixed and dissolved, and a mixed solution is obtained; adding a silver ion solution into the mixed solution, and carrying out a first hydrothermal reaction to obtain a reaction solution; mixing the reaction liquid with a carbon source and a reducing agent, carrying out a second hydrothermal reaction, and separating a solid phase to obtain a precursor; and sintering the precursor to obtain the lithium iron manganese phosphate positive electrode material. In the hydrothermal reaction stage, silver ions can inhibit rapid growth of high-energy crystal faces, and finally more high-energy crystal faces are exposed. And in the sintering stage, silver ions are reduced into simple substances to modify the carbon layer, a carbon-metal composite conductive network is formed, and the conductivity of the carbon layer is improved. The preparation method is simple and convenient to operate, can quickly and efficiently form the nanoscale lithium manganese iron phosphate positive electrode material with relatively good electrical properties and [001] crystal face orientation, and has a relatively good application prospect.

The invention relates to a preparation method of an oxygen vacancy-rich bismuth molybdate / bismuth vanadate composite photo-anode and a product and application thereof, and belongs to the technical field of photoelectrocatalysis. The invention discloses a preparation method of an oxygen vacancy-rich bismuth molybdate / bismuth vanadate (Bi2Mo2O9 / BiVO4) composite photo-anode, which mainly comprises the following steps: immersing a fluorine ion-doped tin dioxide (FTO) conductive glass substrate into a Bi < 3 + > ion solution and an I <-> ion solution to form a bismuth oxyiodide (BiOI) film, dropwise adding a dimethyl sulfoxide solution of vanadyl acetylacetonate (VO (acac) 2), and putting into a muffle furnace to prepare the BiVO4 photo-anode. And then vertically immersing into a Bi < 3 + > ion solution and a Mo < 6 + > ion solution, and carrying out annealing treatment in an argon atmosphere to prepare the Bi2Mo2O9 / BiVO4 composite photoanode rich in oxygen vacancies. The Bi2Mo2O9 / BiVO4 material rich in oxygen vacancies is a metal oxide composite photo-anode, the photoelectrocatalysis efficiency can be improved, and hydrogen peroxide (H2O2) can be continuously generated in natural seawater through photoelectrocatalytic oxidation of water for a long time.

Provided in the present invention is the use of an antibacterial catalytic metal and magnetic acid lanthanide oxide composite material in the elimination of phosphorus and resistance gene pollution in tail water, wherein the preparation process for the composite material is as follows: S01, using a dipping-calcining method, mixing a lanthanide element ion solution, a magnetic element ion solution and a carrier, and uniformly stirring, centrifuging and calcining same to obtain a calcined product, i.e., a magnetic acid lanthanide oxide-carrier; S02, using a heating precipitation method, adding the calcined product in S01 to an antibacterial catalytic metal element precursor solution, adding an ammonia water solution thereto in a dropwise manner, and continuously stirring and heating same in a water bath to obtain a mixed system of the composite material; and S03, using a mixed calcining method, calcining the mixed system obtained in S02 to obtain the composite material, i.e., a magnetic acid lanthanide oxide and antibacterial catalytic oxide heterojunction-carrier. The composite material obtained by using the preparation method can be used in the elimination of phosphorus and resistance genes in an agricultural water environment.

The invention provides a preparation method of an air cathode material of a mesoporous Cu-N-C zinc-air battery. The preparation method comprises the following steps: 1, uniformly spreading a zinc-based imidazole framework precursor embedded with SiO2 nanoparticles in a corundum boat, placing the corundum boat in the center of a tubular furnace, and carrying out pre-pyrolysis in an Ar atmosphere to obtain nitrogen-doped carbon NC powder containing SiO2 nanoparticles; and 2, removing the SiO2 nanoparticles by using a 40% hydrofluoric acid solution to obtain the mesoporous NC powder. And 3, preparing a copper ammonia ion [Cu (NH3) 4] < 2 + > solution with a certain concentration, adding the mesoporous NC powder, carrying out ultrasonic treatment at room temperature, stirring, and carrying out high-temperature pyrolysis to obtain the mesoporous Cu-N-C material. The material has rich mesoporous structures and excellent oxygen reduction activity, and realizes high power density and excellent charge-discharge cycle stability when being used as an air cathode of a zinc-air battery.

The invention provides a vanadium electrolyte and a preparation method and application thereof. The preparation method comprises the following steps: (1) mixing a compound containing pentavalent vanadium and a sulfuric acid solution to obtain a pentavalent vanadium solution; (2) the pentavalent vanadium solution obtained in the step (1) is subjected to electrolytic reduction, and a first vanadium ion solution is obtained; during the electrolytic reduction, carrying out first ultraviolet irradiation on the pentavalent vanadium solution in the electrolytic reduction process; or, after the electrolytic reduction is completed, the first vanadium ion solution is subjected to second ultraviolet irradiation, and a second vanadium ion solution is obtained; and (3) carrying out extraction and back extraction on the first vanadium ion solution or the second vanadium ion solution in the step (2) to obtain the vanadium electrolyte. By adopting the preparation method, the purity of the vanadium electrolyte and the recovery rate of vanadium are effectively improved, the content of vanadium ions with different valence states in the product can be flexibly regulated and controlled, and the preparation method can be widely applied to all-vanadium redox flow batteries and other industrial fields needing trivalent and tetravalent vanadium solutions.

The utility model belongs to the technical field of catalyst preparation devices, and particularly relates to an automatic catalyst preparation device which comprises a base, a bracket, a lifting mechanism, a stirring motor, an adapter shaft, a dispersion impeller, a slurry barrel and an ultrasonic dispersion pool assembly, the bracket and the ultrasonic dispersion pool assembly are respectively arranged on the base, and the slurry barrel is arranged in the ultrasonic dispersion pool assembly; the lifting mechanism is used for driving the stirring motor to lift, the upper end of the coupling shaft is connected with the driving end of the stirring motor, and the dispersing impeller is mounted at the lower end of the coupling shaft. The device can synchronously realize the actions of ultrasonic dispersion, automatic lifting of the dispersion impeller and high-speed stirring, can improve the mixing uniformity of a catalyst and an ionic solution in the preparation process, avoids the phenomenon of catalyst precipitation, helps research and production personnel to improve the uniformity of catalyst preparation, and improves the production efficiency. Synchronization and automation of the catalyst preparation process are achieved, product performance is effectively guaranteed, and the device is compact in overall structure, stable and reliable in operation and convenient and easy to disassemble, assemble and maintain.

The invention relates to the technical field of battery disassembling, and particularly discloses a new energy automobile battery disassembling, classifying and recycling device. According to the new energy automobile battery disassembling, classifying and recycling device, the purpose of separating battery fragments from an ionic solution is achieved, equipment is supported by a bottom plate support, the smashed battery fragments are stirred, mixed and heated through a stirring device, and therefore the reaction of ions and a medicament for reduction is accelerated; a stirred solution passes through the interior of the stirring device to be filtered, fragments are pushed out under the action of the stirring device, a medicament passes through the inner wall of the stirring device to reach the interior of the classification device to be concentrated and heated so as to solidify ions, and the ions are gathered and pushed out so as to be conveniently collected; and the evaporated water vapor is cooled by the material guiding device and is used for carrying out auxiliary heating on the new medicament again, so that the medicament reaction speed is increased.

The invention discloses a molybdenum disulfide nanoflower composite material loaded with copper particles as well as a preparation method and application of the molybdenum disulfide nanoflower composite material. The preparation method of the composite material comprises the following steps: firstly, preparing a molybdenum disulfide material with a three-dimensional flower-shaped structure through a hydrothermal method; ultrasonically dispersing the molybdenum disulfide material in water, mixing with a copper ion solution in a corresponding proportion, performing ultrasonic treatment, transferring into a photoreactor, keeping an anaerobic condition through nitrogen bubbling under illumination and stirring, injecting a reducing solution, performing photodeposition reaction to anchor nano-scale copper particles to the surface of the molybdenum disulfide material, and preparing the molybdenum disulfide material. The molybdenum disulfide nanoflower composite material with the three-dimensional structure and loaded with the copper particles is obtained. The composite material prepared by the invention is good in stability, can be applied to the field of sterilization, has a remarkable sterilization effect on escherichia coli, staphylococcus aureus and pseudomonas aeruginosa, and has a good application prospect, and the catalyst is not easy to lose and can be recycled.

The invention discloses a double-layer ion enhanced high-range high-linearity fabric-based flexible pressure sensor and a preparation method thereof, and belongs to the technical field of underwater flexible pressure sensors. The flexible pressure sensor comprises a first composite layer and a second composite layer, and a porous material is arranged between the first composite layer and the second composite layer. The first composite layer and the second composite layer are symmetrically arranged on the two sides of the porous material; the first composite layer sequentially comprises a flexible substrate, a nickel cloth electrode and an ionic membrane layer from outside to inside, the flexible substrate is formed by thermal bonding of a fabric and a TPU film, and the fabric is located on the outer side; the ionic membrane layer is formed by coating a nickel cloth electrode with a first ionic solution in a silk-screen printing manner; and thermally bonding the first composite layer, the porous material and the second composite layer, and wrapping the outer sides of the first composite layer and the second composite layer with PDMS to obtain the flexible pressure sensor. The flexible pressure sensor has the advantages of ultrahigh measuring range, high linearity, high sensitivity and the like.

The invention discloses a method for regenerating a nitrogen-doped carbon coating lithium iron phosphate positive electrode material, a regenerated positive electrode material and application of the regenerated positive electrode material, and belongs to the technical field of battery materials. The method for regenerating the N / C-coated LiFePO4 positive electrode material comprises the following steps: recycling a waste lithium iron phosphate material from a waste lithium battery by using a roasting and ultrasonic treatment method; uniformly mixing the waste lithium iron phosphate material with a reducing agent and a nitrogen source, and adding the mixture into a lithium ion solution for hydrothermal reaction; and centrifugally separating black powder from the mixed solution after the hydrothermal reaction, and freeze-drying to obtain the nitrogen-doped carbon coating lithium iron phosphate positive electrode material. According to the regenerated N / C-coated LiFePO4 positive electrode material obtained by the method, lithium loss, particle breakage and disordered carbon layer repairing are effectively repaired, and a new way is provided for recycling of the LiFePO4 positive electrode of the waste lithium ion battery.

The invention belongs to the technical field of solid waste treatment, and particularly relates to a stabilizing treatment method for iron-aluminum slag containing Ni, Co and F. The stabilizing treatment method comprises the following steps: (1) mixing the iron-aluminum slag with water to prepare first slurry, adding an alkaline substance under the condition of continuously introducing air, and reacting after stirring to obtain second slurry; and (2) under the conditions of continuously introducing air and stirring, adding a calcium-containing substance and a phosphate ion-containing solution into the second slurry, adjusting the pH value of the second slurry to be greater than or equal to 8, and carrying out solid-liquid separation after reaction to obtain filtrate and stabilized iron-aluminum slag.

The invention relates to the technical field of environmental protection and water treatment, in particular to a preparation method and application of a one-step aluminum modified fish scale calcium defluorination material. The defluorination material with economical efficiency and high efficiency is successfully prepared through combination of hydrochloric acid demineralization pretreatment and a sodium metaaluminate one-step modification process; the removal rate of the prepared composite material to a 10mg / L fluorine ion solution can reach 94.76%, the theoretical maximum adsorption capacity reaches 118.53 mg / g, the actual test adsorption capacity reaches 9.56 mg / g, and stable and efficient adsorption performance is kept within the pH range of 3-6; the method is simple in technological process and mild in reaction condition, the material preparation cost is remarkably reduced, and an innovative solution with practicability and economical efficiency is provided for fluorine-containing wastewater treatment.

A silver particle-modified carbon-coated lithium manganese iron phosphate cathode material and a preparation method thereof relate to the field of material technology. The preparation method comprises the following steps: mixing and dissolving a lithium source, an iron source, a manganese source, and a phosphorus source to obtain a mixed solution; adding a silver ion solution to the mixed solution, performing a first hydrothermal reaction, and obtaining a reaction solution; mixing the reaction solution with a carbon source and a reducing agent, performing a second hydrothermal reaction, separating the solid phase, and obtaining a precursor; and sintering the precursor to obtain the lithium manganese iron phosphate cathode material. During the hydrothermal reaction stage, silver ions can inhibit the rapid growth of high-energy crystal faces, ultimately exposing more high-energy crystal faces. During the sintering stage, the silver ions are reduced to a single substance to modify the carbon layer, forming a "carbon-metal" composite conductive network and improving the conductivity of the carbon layer. The preparation method is simple and convenient to operate, and can quickly and efficiently form a nanoscale lithium manganese iron phosphate cathode material with better electrical properties and a [001] crystal plane orientation, thus having good application prospects.

A hot-gas-generating apparatus for reacting a propellant comprises a combustion chamber, at least one injector that is arranged upstream of the combustion chamber and can be closed, on the combustion chamber side, to the propellant, electrodes being integrated in said injector, and at least one supply line for the propellant. In this context, the propellant is a monopropellant and a substantially water-free ionic solution having low vapor pressure, preferably with a residual water content of less than five percent by mass, which is capable of self-sustaining combustion at a given combustion chamber pressure, and the electrodes have at least two electrodes of opposite polarity which are suitable for electrically igniting the propellant by means of a flow of current through the propellant when this propellant flows between the opposite-polarity electrodes.

The invention discloses an ionic conductive hydrogel material as well as a preparation method and application thereof in an electrochemical electrode. The ionic conductive hydrogel material is prepared from the following raw materials in parts by weight: a nonionic water-soluble polymer, a water-soluble ionic polymer, a cross-linking agent, an initiator and a water-retaining agent. After the ionic conductive hydrogel is processed into a certain shape and soaked in a conductive ionic solution, the ionic conductive hydrogel can be used as a solid electrolyte to construct an electrochemical electrode suitable for on-site coating detection. The ionic conductive hydrogel disclosed by the invention has the advantages of optimal ionic conductivity, necessary mechanical property and mechanical stability, controllable swelling ratio and excellent chemical and electrochemical stability. The ionic conductive hydrogel is applied to an electrochemical electrode as a solid electrolyte, and high-concentration electrolytic active substances, namely conductive ions, are allowed to freely move in the hydrogel, so that the ionic conductivity of the hydrogel electrolyte is improved, and the reliability of the electrochemical electrode is ensured.

Systems and methods for generating hydrogen. The method includes activating an aluminum composition via alloying with at least one metal, reacting the activated aluminum composition in an aqueous ionic solution to produce hydrogen, and adding imidazole to the aqueous ionic solution and the activated aluminum composition to increase the reaction rate between the activated aluminum composition and the aqueous ionic solution.

The application discloses a preparation method of a cement-based material surface calcium carbonate crystalline layer, and comprises the following steps: step one, mixing cement and water, pouring into a mold for curing, demolding and curing to obtain a cement test block which is not completely hydrated; step two, adding sodium chloride, sodium sulfate, potassium chloride and sodium bicarbonate into deionized water to prepare an inorganic ion solution, and the concentration of sodium bicarbonate is greater than or equal to 0.20 g / kg; step three, soaking the cement test block which is not completely hydrated obtained in step one into the inorganic ion solution prepared in step two, rinsing the surface after taking out, terminating hydration, vacuum drying, and obtaining a cement test block surface calcium carbonate crystalline layer. The prepared crystalline layer is uniform and dense, the operation is simple, the surface mineralization can be carried out by using bicarbonate ions in the inorganic ion solution, the penetration of chloride ions and the potential negative effects accompanied by the penetration of chloride ions are avoided, and the cement test block can be further modified by silane to obtain high hydrophobicity and resist moisture infiltration.

Proposed is a self-current-generating skin-applicable patch with a first area in contact with the skin and a second area adjacent to and spaced apart from it, where either area contains a biodegradable metal, decomposable and absorbable through skin contact or reaction with tissue moisture. The patch includes a first electrode layer directly contacts the skin as a thin sheet integrated with the first area and has at least one fluid-transferable penetration part, a second electrode layer of a material with a different standard reduction potential is positioned opposite a skin-contacting side, partially extending to connect electrically to the second area, and a support layer, a hydrophilic sheet of predetermined thickness, is positioned opposite the skin-contacting side, having an ionic solution supported. Thus, sufficient iontophoresis and other micro-current effects with active ingredients are achieved through self-generated micro-current, even without a battery-like external power source.

The invention belongs to the technical field of new materials, and provides a preparation method of high-yield nickel disulfide (NiS2) or a nickel disulfide / sulfur compound (NiS2 / (x-2) S, 3 < = x < = 8) and an application of NiS2 or NiS2 / S in an electrode material. The preparation method comprises the following steps: mixing a nickel ion (Ni < 2 + >) solution with a sodium disulfide (Na2S2) solution or a sodium polysulfide (Na2Sx, x is greater than or equal to 3 and less than or equal to 8) solution, stirring and reacting for 0.5-12 hours, collecting precipitates obtained by reaction, washing and drying to obtain a NiS2 or NiS2 / (x-2) S (x is greater than or equal to 3 and less than or equal to 8) product. The preparation method is simple and easy to operate, low in cost, high in atom utilization rate, green and environment-friendly, high in safety and capable of realizing large-scale industrial production. And when used as an electrode material for a sodium ion battery, the composite material shows good electrochemical performance.

The invention provides a method for extracting rubidium and cesium from mixed salt or solution containing rubidium and cesium, which comprises the following steps: S1, providing a raw material, and purifying an ionic solution containing rubidium and cesium to obtain a solution containing rubidium and cesium; s2, aluminum sulfate and sulfuric acid are added into the solution containing rubidium and cesium for preferential crystallization of cesium, and a first batch of aluminum alum crystals and a first mother solution are obtained; s3, dissolving and purifying the first batch of alumen crystals to obtain high-purity cesium salt; s4, sequentially carrying out evaporation concentration and crystallization separation on the first mother liquor to obtain a second batch of alumen crystals and a second mother liquor; and S5, fusing and purifying the second batch of alumen crystals to obtain high-purity rubidium salt, and returning the second mother liquor to the step S1 for recycling, and the method has the effects of high extraction recovery rate and low cost.

The invention belongs to the technical field of electroplating, and particularly relates to a row hanging tool with auxiliary anodes. The main body part is arranged in the middle of the anode part and is used for supporting the device; the connecting supporting rods are symmetrically arranged on the left side and the right side of the main body component, and modified hooks are evenly arranged on the outer surfaces of the connecting supporting rods. After a metal piece needing to be electroplated is hung on the refitted hook of the device, the metal piece is immersed in an ion solution for electroplating work, and the rotary hook can realize a self-locking state in a manner that the inner rotary hook rod is inserted into the adaptive slot, so that the metal piece hung on the refitted hook cannot be separated from the device; when the metal part enters an ion solution for electroplating, the independent motor can drive the rotary hook and the metal part to rotate at the axis, so that the outer surface of the metal part is in full contact with the ion solution, and the problem that the contact part of the metal part and the modified hook cannot be effectively electroplated to cause electroplating flaws is solved.