375 results about "Iron metal" patented technology

The invention relates to the field of fertilizers, in particular to a macroelement water-soluble fertilizer and a preparation method thereof.The preparation method comprises the steps that a composite biochar material is prepared from biochar, loaded metal modified biochar and an iron metal material, and then the composite biochar material is compounded with tripotassium phosphate, monopotassium phosphate, disodium octoborate tetrahydrate, zinc sulfate monohydrate and the like; the finally prepared fertilizer can realize accurate fertilizer supply, the iron metal organic framework material efficiently converts nitrate nitrogen into ammonium nitrogen and cooperates with a large amount of trace elements such as tripotassium phosphate, the requirements of crops at all stages are met, nutrients in key periods are guaranteed, pores of the composite biochar material adsorb the nutrients, nutrient slow release is realized, root system interpenetration resistance is reduced, stress resistance is enhanced, and the yield of the crops is increased. The soil conditioner has the advantages of simple preparation process, reduction of growth hindrance, optimization of soil aggregates, increase of pores, reduction of volume weight, improvement of ventilation, water permeability and water and fertilizer retention capabilities, substantial agricultural economy energization, substantial yield increase of crops, and wide application prospects.

The invention belongs to the field of air electrode materials of zinc-air batteries, and particularly relates to a self-supporting electrode and a preparation method and application thereof. The invention discloses a self-supporting electrode. The self-supporting electrode comprises a conductive substrate, a nitrogen-doped carbon nanotube and FeNi3 particles distributed in the nanotube, the nitrogen-doped carbon nanotubes grow on the surface of the conductive substrate. According to the self-supporting electrode provided by the invention, nickel has high OER catalytic activity, meanwhile, iron shows high ORR catalytic activity, and an efficient bifunctional catalyst is obtained by adding heteroatom iron into a nickel-based material under a synergistic effect; ferronickel metal is distributed in the nitrogen-doped carbon nanotube, so that metal particle aggregation in a high-temperature synthesis process or decomposition failure under an extreme working condition is effectively prevented; the self-supporting electrode is high in electrochemical activity, good in cycle performance, good in flexibility and portability, stable and excellent in battery performance and excellent in mechanical performance.

The invention relates to a preparation method of a three-dimensional ferrocobalt metal oxide oxygen evolution catalyst. According to the method, foamed nickel is selected as a carrier, the foamed nickel is pretreated, a metal ion and ethanol mixed solution is evenly adsorbed to the surface of the foamed nickel, then open fire ignition is carried out, and a second-level self-limiting combustion process is carried out, so that metal ions form a ferrocobalt metal oxide material with a three-dimensional network structure in situ on the surface of the foamed nickel. The method is simple and easy to implement, a target product can be generated within second-level time, and the area of a foamed nickel matrix is adjusted according to needs, so that the three-dimensional ferrocobalt metal oxide catalyst is prepared on a large scale. The material obtained by the invention is used as an oxygen evolution anode catalyst, and the three-dimensional network-shaped ferrocobalt metal oxide oxygen evolution catalyst shows excellent electrochemical performance.

The invention discloses a synthesis method and application of an iron-aluminum co-doped catalyst, and the synthesis method is characterized by comprising the following steps: S1, dissolving an aluminum metal salt and an iron metal salt in a beaker containing deionized water to obtain a solution A; s2, adding a phosphorus source into the solution A, and adjusting the pH to form a turbid liquid B; s3, biomass is added into the turbid liquid B to be stirred for 30 min, and a solution C is obtained; s4, adding a nitrogen source into the solution C, and drying the beaker in a water bath kettle; mixing the obtained dried product with an activating agent, and calcining under inert gas to obtain a catalyst crude product; and S5, grinding the catalyst crude product, washing with ethanol and deionized water, and carrying out vacuum drying to obtain the iron-aluminum co-doped catalyst. The preparation method is simple and low in equipment requirement. The invention discloses a novel nitrogen-doped carbon-coated zero-valent iron nanoparticle catalyst which can degrade pollutants by utilizing electron transfer of the pollutants and the catalyst under the condition of adding any oxidizing agent. Under the neutral room temperature condition, the catalyst has a very good removal effect on degradation of organic pollutants which are difficult to biodegrade, has very good stability, and is low in iron ion dissolution rate.

An electrochemical reactor, including a channel for containing and directing flow of an electrolyte stream, wherein the electrolyte stream includes an electrolyte and an iron-containing feedstock; an anode and a cathode positioned in contact with the channel; and a source of a magnetic field positioned in proximity to the cathode, wherein the electrochemical reactor is configured to electrochemically reduce at least a portion of the iron-containing feedstock to iron metal at a surface of the cathode and in a magnetic field of the source, and wherein the at least a portion of the iron-containing feedstock is electrochemically reduced to the iron metal at a current efficiency of at least 0.75, wherein the current efficiency is a ratio of charge used for the reduction of the iron-containing feedstock to a total charge provided to the cathode.

The invention provides a lithium manganese iron phosphate positive electrode material and a preparation method and application thereof. The method comprises the following steps: mixing manganese metal and iron metal, heating, melting and uniformly mixing in an inert gas atmosphere, and grinding into powder; adding an ammonium salt solution, continuously adding the ground manganese-iron alloy powder under heating to form a suspension, introducing compressed air and stirring, reacting, filtering, washing, drying, crushing and grinding to obtain a manganese-iron oxide precursor, feeding the manganese-iron oxide precursor, a lithium source, a phosphorus source and doped metal elements into pure water, adding a carbon source, mixing to form a suspension, and grinding and drying to obtain the lithium-phosphorus-doped manganese-iron composite material. And carrying out carbon thermal reduction in an inert gas atmosphere, and crushing to obtain the lithium manganese iron phosphate positive electrode material. The ferromanganese oxide precursor prepared by heating the metal manganese and the metal iron to a molten state and mixing the metal manganese and the metal iron realizes uniform dispersion of the manganese and the iron at an atomic level, avoids the problems of nonuniform mixing of the manganese and the iron and dissolution of the manganese, and improves the conductivity and the electrochemical performance of the material.

The utility model discloses a waste treatment device for solar photovoltaic panel production, which comprises a sorting box, a crushing box is fixedly embedded at the top of the sorting box, a feed port is arranged at the top of the crushing box, and a crushing component for crushing photovoltaic panel waste is arranged in the crushing box. The crushing box is arranged at the top of the sorting box, the crushing assembly is arranged in the crushing box, photovoltaic panel waste can be fully crushed, the crushed photovoltaic panel waste directly enters the sorting box, iron metal and plastic in the waste can be sorted by arranging the magnetic separation assembly in the sorting box, and the sorting efficiency is improved. A worker does not need to independently use third-party equipment for sorting operation, the use flexibility of the device is improved, the use functions of the device are richer, and in addition, a filter screen plate is arranged at the top of a bearing plate, so that dust and other fine impurities in the crushed waste can be filtered out.

The invention belongs to the technical field of water treatment, and particularly relates to an iron-carbon composite material, a preparation method of the iron-carbon composite material and application of the iron-carbon composite material to synchronous removal of perfluoro and polyfluoroalkyl compounds. According to the iron-carbon composite material provided by the invention, the iron metal element is anchored on the carbon carrier material in a nanocluster form, so that the problem of new pollution caused by iron dissolution is avoided, and the iron-carbon composite material is high in adsorption rate, large in adsorption capacity, recyclable and good in long-term stability. According to the invention, the PFAS is captured through hydrophobic interaction and electrostatic attraction by utilizing the coding characteristics, excellent adsorption performance is shown in treatment of various pollutants, rapid, efficient and synchronous removal of the PFAS is realized, and meanwhile, the high utilization rate of the iron-carbon composite material is ensured. As an adsorbent, the iron-carbon composite material provided by the invention is particularly suitable for repairing a perfluorooctanoic acid and / or perfluorooctane sulfonic acid combined polluted water body, the repairing is efficient, the cost is low, the removal condition of pollutants can be accurately judged, and the iron-carbon composite material is suitable for underground water or surface water.

The invention discloses a foreign matter detection method for a belt conveyor, and belongs to the technical field of coal transportation metal detection. Comprising a fluxgate sensor and a signal acquisition unit. Wherein the fluxgate sensor and the signal acquisition unit are integrated into an integrated unit, and a Doppler array structure is constructed by a plurality of integrated units; the signal acquisition unit comprises an excitation signal generation part, a signal processing part, an AD acquisition part and a data processing algorithm part; according to the metal detection device, the magnetic sensor is fixed above the conveying belt through the non-magnetic support, magnetic field environment data generated when no abnormal metal exists serves as the background, magnetic abnormal signals generated by metal on the conveying belt below are detected through the magnetic sensor, and local voice alarm is accessed locally or a sealing-tape machine is controlled to stop. Iron metal in the coal flow is detected, the relative size of the iron metal and the relative position after shutdown are judged, and identification is more accurate.

The invention discloses a bio-based gemini quaternary ammonium salt compound as well as a preparation method and application thereof. The bio-based gemini quaternary ammonium salt compound is a compound with a structural formula as shown in a formula I, wherein R1 is selected from one of cyclohexanone, cyclopentanone, acetone, 2-octanone and 2-pentanone; r2 is selected from C4-C24 alkyl groups (except C19 and C21); x is at least one of Cl, I and Br. The bio-based gemini quaternary ammonium salt compound disclosed by the invention takes 5-hydroxymethylfurfural as a raw material, has a furan ring, a quaternary ammonium salt substituent group and a long alkyl chain in the structure and can be used as a corrosion inhibitor, and a quaternary ammonium salt functional group and an alkyl long chain are constructed in the structure and respectively serve as a hydrophilic functional group and a hydrophobic functional group, so that the biological activity of the compound is improved. When the gemini quaternary ammonium salt corrosion inhibitor is in contact with steel (metal), a protective film can be formed on the surface of the steel (metal), so that the effect of protecting the steel (metal) is achieved, the corrosion speed of the steel (metal) is slowed down, and the economic benefit is extremely high; # imgabs0 #

The invention relates to the field of adsorption materials, and provides a preparation method of a multi-dimensional layer adsorption material for wastewater treatment. Firstly, a titanium-containing precursor solution is prepared through an ice template method, and an oriented porous titanium dioxide precursor framework is formed; and then, carrying out high-temperature calcination to obtain the columnar porous titanium dioxide adsorption material. Then, in-situ growth of an iron-containing metal organic framework (MOF) nanowire is carried out in the pore channel of the titanium dioxide adsorption material, and directional growth of the nanowire is realized by controlling the concentration of metal salt, a solvent system and magnetic field induction. And finally, multi-stage purification and structure stabilization treatment are adopted, so that the mechanical stability and the adsorption performance of the material are improved. By optimizing the pore structure and MOF loading, the adsorption capacity and degradation efficiency of the material to pollutants are improved, the problems that a traditional material is insufficient in mechanical strength and poor in stability are solved, and the material is suitable for efficient wastewater treatment.

The utility model relates to the technical field of cutting fluid recovery, and discloses a cutting fluid recovery device for metal cutting machining, which comprises a recovery outer barrel, a recovery inner barrel is clamped in the recovery outer barrel through a rotating disc, and a first motor is arranged at the lower end of the recovery outer barrel. The output end of the first motor is fixedly connected with a rotating disc in the recycling outer cylinder through a rotating shaft. A treatment box is fixedly arranged at the lower end of the recycling outer cylinder, and a liquid inlet pipe penetrates through the lower end of the recycling outer cylinder. According to the cutting fluid recycling device for metal cutting machining, fine iron metal and the like contained in cutting fluid can be adsorbed through the adsorption magnetic roller, pipeline blockage or influence on the use effect of the cutting fluid due to circulation of the cutting fluid is avoided, fine scraps attached to the surface of the adsorption magnetic roller can be cleaned through the discharging plate, and the cutting fluid recycling device is convenient to use and high in practicability. And the continuous adsorption effect of the adsorption magnetic roller is guaranteed, then the waste scraps can be pushed to the two sides of the treatment box through movement of the reciprocating scraper, and the purpose of automatically cleaning the interior of the treatment box is achieved.

The invention relates to an atomic-scale dispersed iron-based nitrogen-oxygen doped carbon material as well as a preparation method and application thereof, and belongs to the technical field of wastewater treatment. The preparation method of the atomic-scale dispersed iron-based nitrogen-oxygen doped carbon material comprises the following steps: (1) uniformly mixing a solution A and a solution B, and then centrifuging, cleaning and drying by distillation to obtain a precursor; the components of the solution A comprise dimethylimidazole and iron phthalocyanine; the component of the solution B comprises zinc nitrate hexahydrate; and (2) carbonizing the precursor at high temperature, cooling, pickling, washing with water, and drying to obtain the atomic-scale dispersed iron-based nitrogen-oxygen doped carbon material. The material prepared by the invention realizes selective adsorption of various new pollutants difficult to degrade by regulating and controlling the coordination of an iron metal atom active center, efficiently activates persulfate to degrade the new pollutants difficult to degrade in multiple ways of free radicals and non-free radicals, and widens the application range of advanced oxidation water pollution treatment.

The invention relates to a porphyrin-based iron metal organic framework (Fe-TCPP) catalyst for improving photoresponsiveness, which is characterized in that the Fe-TCPP nano catalyst is prepared by using an iron source and meso-tetra (4-carboxyphenyl) porphin (TCPP) as precursors through a simple solvothermal method, assisting coordination by virtue of polyvinylpyrrolidone (PVP), performing sealed reaction after ultrasonic dispersion, and preparing the Fe-TCPP nano catalyst. A purple suspension is obtained. And centrifuging, washing and drying to obtain the nano rod-shaped Fe-TCPP metal organic framework material. The Fe-TCPP catalyst prepared by the preparation method disclosed by the invention has a regular crystal structure and good dispersity, and can be stably coordinated to form a Fe-O cluster structure. The effective introduction of the TCPP enhances the charge transfer (LCCT) capability from the ligand to the metal cluster, effectively promotes the Fe (III) / Fe (II) circulation, and improves the photocatalysis-ozonation catalytic efficiency. The catalyst has the advantages of high thermal stability, less metal ion dissolution, good cycle performance and the like, and has wide application potential in the field of water treatment.

This invention relates to a defect-laden porous carbon support for a stable iron-based diatomic catalyst, its preparation method, and its application in air batteries, belonging to the field of catalyst preparation technology. The preparation method involves the following steps: ZIF-8 is subjected to high-temperature heat treatment under a nitrogen atmosphere, followed by rapid cooling under a liquid nitrogen atmosphere; then mixed with an iron metal source, and ethanol is added for defect backfilling. After stirring and drying, a second heating is performed to obtain the catalyst. This method can firmly and precisely anchor two metal atoms onto the carbon support, ensuring the formation of stable diatomic sites and their full exposure. This ensures that the active sites are in full contact with the substrate to exert their efficient catalytic effect, avoiding particle agglomeration that could lead to clusters or metal particle formation, causing some sites to be encapsulated and hindering their high activity. This method can be effectively applied in air batteries.

The invention belongs to the technical field of electrode materials, and particularly discloses a self-supporting electrolyzed water catalytic electrode material, a preparation method and application thereof, the self-supporting electrolyzed water catalytic electrode material comprises a foamed nickel-molybdenum alloy as a substrate, and the surface of the foamed nickel-molybdenum alloy is covered with a two-dimensional layered nickel-iron metal hydroxide. The nickel-molybdenum alloy self-supporting nickel-iron double-metal hydroxide obtained by the technology is used as a bifunctional catalyst for hydrogen evolution and oxygen evolution reaction in a non-acidic medium. The foamed nickel-molybdenum alloy is used as a raw material of a current collector and a catalytic active site at the same time, a fresh crystal nucleus is formed on the surface of the foamed nickel-molybdenum alloy through one-step ferric ion etching, then the foamed nickel-molybdenum alloy is placed in air, and the catalytic activity of the nickel-molybdenum alloy is improved under the combined action of water and oxygen. The nickel element from the foamed nickel-molybdenum alloy and the adsorbed iron element spontaneously grow on the surface of the nickel-molybdenum alloy to form the layered double-metal hydroxide nanosheet.

The invention provides an iron metal oxyhydroxide catalyst, a preparation method thereof and application of the iron metal oxyhydroxide catalyst in urea electrosynthesis, and belongs to the technical field of electrocatalysis, the iron metal oxyhydroxide catalyst comprises a stainless steel mesh substrate and a FeOOH layer coating the surface of the stainless steel mesh substrate; wherein the stainless steel mesh substrate is subjected to diluted hydrochloric acid soaking ultrasonic pretreatment. The iron metal oxyhydroxide catalyst with a polarized Fe0-Fe3 + structure is prepared by taking a stainless steel mesh pretreated by diluted hydrochloric acid as a substrate through an electrochemical deposition process. The catalyst has high C-N coupling selectivity and good cycling stability in a urea electro-catalysis synthesis reaction.

The invention relates to synthesis of a novel nano material and application of the nano material in the field of supercapacitors, and discloses preparation and application of island-shaped nickel-vanadium-iron phosphide in-situ decoration nickel-vanadium-iron metal organic framework nano flower / foamed nickel. The invention aims to solve the problem that the existing super capacitor is insufficient in specific capacitance and energy density. The preparation method mainly comprises the following steps: 1, preparing nickel-vanadium-iron metal organic framework nanoflower / foamed nickel (NiVFe-MOF / NF) by a solvothermal method; and 2, preparing the heterojunction (NiVFe-P coated NiVFe-MOF / NF) of the nickel-vanadium-iron metal organic framework decorated by the island-shaped nickel-vanadium-iron phosphide (NiVFe-P) by an in-situ partial phosphorization method. The preparation method has the advantages of simplicity, low cost, high yield and the like. Due to the controllable heterojunction and abundant heterogeneous interfaces, the material shows excellent electrochemical characteristics. The specific capacitance is 2368.5 C g <-1 > when the specific capacitance is 1A g <-1 >, and the capacitance retention rate is still 90% after 10,000 cycles at the specific capacitance of 10A g <-1 >. In a two-electrode system, when the power density is 1.16 W kg <-1 >, the energy density of NiVFe-P-coated NiVFe-MOF / NF / / activated carbon / NF can reach 109.4 Wh kg <-1 >.

The invention discloses a composition containing a honeysuckle extract, a tablet and a production method thereof, and belongs to the technical field of medicines.The preparation method comprises the steps that pseudo-ginseng, honeysuckle and radix isatidis are dried and ground into powder, a hydrogel film coating with an environmental response function is prepared, and the hydrogel film coating has porosity and environmental tolerance, can improve the slow release performance of a medicine, and has a good application prospect. The active ingredient preservation time of the medicine is protected, and the medicine effect is prolonged; according to the hydrogel film coating, natural plant-derived polysaccharide and microcrystalline cellulose with excellent biocompatibility are used as raw materials, the raw materials are subjected to swelling treatment and then grafted with a polyethylene glycol-maleic anhydride copolymer, then an iron metal framework sensitive to the pH value is subjected to hydrothermal synthesis on the surface, the iron metal framework serves as a crosslinking center, a hydrogel film structure is generated through crosslinking to serve as the coating, and the hydrogel film coating is prepared. Therefore, the permeation resistance and mechanical strength of the coating are balanced, the swelling rate difference is avoided, the structural stability of the coating is guaranteed, and the tablet prepared from the coating can be used for treating cold and has a good drug effect.

The utility model discloses a waste plastic screening and separating device which is characterized in that two crushing rollers are rotatably arranged in a box body, one end of each crushing roller is fixedly connected with a gear, one end of one crushing roller is fixedly connected with a first motor, the first motor is fixedly connected with the box body, and the other end of the crushing roller is fixedly connected with a second motor; a second motor is fixedly arranged on the outer side of the box body, a threaded rod is rotationally connected to the outer portion of the box body, one end of the threaded rod is fixedly connected with the second motor, a filtering plate and two material guiding plates are fixedly arranged in the box body, after waste plastic is screened, a partition plate is pulled out, then magnets are pulled up, and the second motor is fixedly connected with the second motor; and in the process of pulling the magnet, the scraper can scrape off the iron metal adsorbed on the surface of the magnet, so that when the iron metal in the filtering frame needs to be cleaned, the iron metal can be collected only by pulling out the bottom plate, the workload of workers is reduced, and the working efficiency is improved.

The invention discloses a high-toughness wear-resistant steel ball and a preparation method thereof, and belongs to the technical field of wear-resistant alloy steel. A medium-frequency induction furnace is used for smelting molten steel, and waste steel, a carburant, ferrochrome, ferrosilicon, metal aluminum and nitrided ferromanganese serve as main furnace charges. The method comprises the following steps: after the molten steel is subjected to slagging-off and standing, when the temperature is reduced to 1518-1533 DEG C, pouring the molten steel on a continuous casting machine to form a round steel bar with the diameter phi of 90-100mm, putting the round steel bar into a heating furnace for heating, after the round steel bar is uniformly heated to 1180-1250 DEG C and is subjected to heat preservation for 45-60 minutes, cutting the round steel bar into steel sections, controlling the length of the steel sections to be 180-225mm, then forging the steel sections into steel balls, and carrying out hot rolling on the steel balls to obtain the steel balls. And the steel balls are subjected to quenching and tempering treatment, so that the steel balls with high strength and hardness and good toughness and wear resistance are obtained, and the steel balls are applied to large mills, have good use effects and have good economic and social benefits in popularization and application.

The invention discloses a method for removing organic pollutants in a water body by activating persulfate with an alkali-modified copper-iron bimetallic catalyst, which is characterized in that the alkali-modified copper-iron bimetallic catalyst is used as a catalyst for activating the persulfate and degrading the organic pollutants in the water body. Wherein the alkali modified copper-iron bimetallic catalyst comprises a copper-iron metal compound (CuFeO2) and oxygen vacancies loaded on the copper-iron metal compound. The catalyst disclosed by the invention has the advantages of large specific surface area, large number of active sites, high catalytic activity, good structural stability and the like, can construct a core mechanism degradation system based on a non-free radical pathway when being used for activating persulfate, can more quickly and thoroughly remove organic pollutants in water when being used for degrading the organic pollutants in the water, and has a good application prospect. The method has the advantages of simple process, convenience in operation, low cost, high practicability, wide application range, high treatment efficiency, good degradation effect, environment friendliness and the like, and is high in use value and good in application prospect.

The invention discloses a method for removing nitrate nitrogen by recycling nickel and iron metals in an electroplating solid waste acid leaching solution to prepare a cathode. The nitrate nitrogen removal effect is achieved under different conditions through regulation and control of parameters in an acid leaching solution electrodeposition process. According to the electrode, nickel and iron heavy metals contained in electroplating wastewater metal solid waste acid immersion liquid serve as basic materials, loose and porous foamy copper CF with the large specific surface area serves as a substrate, the nickel and iron heavy metals grow on the surface of the foamy copper in situ in the form of LDH through an electrodeposition method, and the NiFe-LDH / CF electrode material is obtained. Meanwhile, the electrode is found to have an excellent electrochemical nitrate nitrogen removal effect by regulating and controlling the initial state of an acid leaching solution in the electro-deposition process. According to the prepared electrode material, heavy metal in electroplating wastewater serves as a source, electrodeposition is adopted, other chemical components do not need to be added, and electrodeposition wastewater is reused after being simply treated; when the electrode is used for treating nitrate nitrogen in electroplating wastewater, the purpose of treating waste with waste is achieved.

The invention discloses a low-cost alkaline medium oxygen evolution catalyst as well as a preparation method and application thereof, and relates to the technical field of electrochemistry. The preparation method comprises the following steps: step 1, mixing an iron metal source and a cobalt metal source, and preparing a salt solution A with a certain concentration; step 2, washing foamed nickel or a nickel metal source with concentrated hydrochloric acid and deionized water, drying, placing in the salt solution A, and standing for a certain time after ultrasonic treatment; step 3, preparing an alkali solution B with a certain concentration from an alkali solution source; slowly dropwise adding the alkali solution B into the salt solution A to precipitate metal ions; and step 4, taking out the foamed nickel or the nickel metal source in the solution, washing with deionized water and absolute ethyl alcohol, and drying to prepare the oxygen evolution catalyst. The oxygen evolution catalyst disclosed by the invention can be used for preparing a self-supporting OER electrode for catalyzing oxygen evolution, and has the advantages of low cost, high catalytic activity, capability of realizing large-scale production, relatively low environmental influence and the like.

The invention provides a titanium-steel cylindrical part construction method, which belongs to the technical field of metal material welding and comprises the steps of sample pretreatment, sample placement and diffusion welding. According to the method, appropriate parameters such as diffusion welding temperature, time and pressure are selected, the axial load of diffusion bonding equipment is applied to the upper end of the titanium alloy cylindrical part, flowing deformation of ceramic particles is restrained through the outermost hard alloy or graphite jacket, the axial load is converted into radial load through the fluidity of the ceramic particles, and the axial load is applied to the upper end of the titanium alloy cylindrical part. The radial load acts on a laminated structure interface through the titanium alloy layer from outside to inside, a transition solid solution can be formed at the structure interface, good interface combination is achieved, meanwhile, mutual diffusion of titanium and iron elements is prevented through the existence of the middle layer, and formation of brittle ferrotitanium intermetallic compounds is avoided. The welding joint obtained through the method has the advantages of being good in combination, free of pores and cracks and the like.

The invention provides a multistage resourceful treatment method for kitchen waste, which comprises the following steps: performing primary solid-liquid separation on the kitchen waste to obtain a first solid phase and leachate discharged from the bottom; inorganic heavy components and iron metal impurities are separated and removed from the first solid phase, and organic solid phase components are reserved; crushing the organic solid-phase component, pulping together with subnatant obtained by standing and layering the leachate, separating light fine slag, removing heavy slag such as inorganic sand and the like to obtain slurry, mixing the slurry with supernate of the leachate, and performing three-phase separation quality-divided treatment and multi-stage resource utilization; wherein the organic solid-phase components comprise fruit and vegetable long fibers, tissues, wooden chopsticks and plastics, and the inorganic heavy components comprise stones, glass and ceramics. According to the multi-stage resourceful treatment method for the kitchen waste, the residue rate is low, the quality of a biochar product is easy to control, the calorific value of biochar is high, and due to multi-stage resourceful utilization, the resource utilization degree is improved, and the wastewater treatment cost is reduced.

An electrochemical reactor comprising a source of a magnetic field positioned in proximity to a cathode and configured to generate a magnetic field; and an electrochemical cell comprising an anode and the cathode, and further comprising a catholyte channel configured to direct a catholyte stream comprising an iron-containing feedstock to the cathode; an anolyte channel configured to direct an anolyte stream comprising a metal chloride to the anode, wherein the catholyte channel and the anolyte channel are disposed between the cathode and the anode; and a separator disposed between the catholyte channel and the anolyte channel, wherein the electrochemical reactor is configured to electrochemically oxidize chloride anions to chlorine gas at a surface of the anode, and wherein the electrochemical reactor is further configured to electrochemically reduce the iron-containing feedstock to an iron particle comprising iron metal at the surface of the cathode and in the magnetic field.

The invention belongs to the technical field of electrochemical luminescence analysis and detection, and relates to an electrochemical luminescence sensor of a defective iron metal organic framework enhanced pyrenyl self-assembled hydrogen bond organic framework, and a preparation method and application thereof. Comprising the following steps: dispensing a PSA-HOF / Pca-MIL-88B (Fe) dispersion liquid on a GCE electrode, drying, dropwise adding a perfluorooctanoic acid aptamer, reacting at room temperature to finally obtain an aptamer modified PSA-HOF / Pca-MIL-88B (Fe) electrode as a working electrode, Ag / AgCl as a reference electrode and a Pt electrode as a counter electrode, and introducing the aptamer modified PSA-HOF / Pca-MIL-88B (Fe) electrode, Ag / AgCl as a reference electrode and a Pt electrode as a counter electrode into a PBS phosphate buffer solution containing potassium persulfate for detecting perfluorooctanoic acid. The prepared PSA-HOF / Pca-MIL-88B (Fe) system electrochemical luminescence sensor has the characteristics of simplicity, convenience and flexibility in operation, wide detection range, low detection limit, low detection cost and the like.

To provide an inspection method for a dissimilar metal connection joint, an inspection device for the dissimilar metal connection joint, a welding method, and a welding system capable of highly reliabily inspecting a joint strength when dissimilar metals are spot-welded, performing instantaneous inspection after welding, and facilitating automation.SOLUTION: This inspection method for the dissimilar metal connection joint in which a plate set stacking at least one steel first member 11 having a through-hole 11a in a plate thickness direction and a non-iron metal second member 13 together is spot-welded at the position of the through-hole 11a measures the projecting height H of a welded metal 15 formed through spot-welding and projecting from the surface of the first member 11 opposite to the second member 13, and determines the welding state of the spot-welding according to the measured projection height H.SELECTED DRAWING: Figure 1

Embodiments of the present disclosure describe metal organic framework (MOF)-like composite material (MOFite) including a salicylaldehydate-based iron metal organic framework composition and graphite, a lithium-ion battery including a cathode and an anode including a salicylaldehydate-based iron metal organic framework composition and graphite, and a scalable synthesis methods for salicylaldehydate-based metal-organic frameworks (SA-MOFs), specifically Fe-Tp, and their applications in lithium-ion batteries (LIBs).