295 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 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.

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 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 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 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.

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.

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).

The utility model relates to the technical field of iron mine tailing processing, in particular to iron mine tailing grading concentration equipment which comprises an iron mine tailing grading concentration machine box, a primary treatment box is fixedly connected to the left side of the iron mine tailing grading concentration machine box, and a water storage box with a water pump is fixedly installed at the top of the iron mine tailing grading concentration machine box. A spray washing pipe frame is fixedly installed at the top of the inner wall of the iron tailing grading and concentrating machine box, a transverse plate is fixedly connected to the position, close to the middle of the inner wall of the iron tailing grading and concentrating machine box, of the iron tailing grading and concentrating machine box, and a first driving motor is fixedly installed at the top of the transverse plate. The iron tailings are crushed, subsequent washing and soaking graded concentration treatment is carried out, the sorting table is additionally arranged, subsequent iron metal adsorption and collection can be conveniently carried out, and the recovery treatment effect of layered, graded, screened, precipitated and concentrated iron tailings is guaranteed.

The present invention generally relates to electrochemical energy storage and battery technology. Specifically, the present invention relates to bifunctional electrocatalyst for metal-air electrochemical device. More particularly, the present invention relates to Nickel-Iron metal¬ organic framework (NF-MOF) as bifunctional electrocatalyst for zinc-air battery application. Further, the present invention relates to synthesis of Nickel-Iron metal-organic framework (NF- MOF) by refluxing method.

This invention relates to the field of catalyst technology, specifically to an iron-based catalyst, its preparation method and application, and the FTO reaction. The catalyst comprises a support and an active component. The active component, expressed as an oxide, has the following general chemical formula: Fe 100 Mn a Nb b Cs c A d B e O x A is selected from Group VIII nonferrous metals and / or Group VIB elements; B is selected from La series elements; the value of a ranges from 30.0 to 130.0; the value of b ranges from 1.0 to 20.0; the value of c ranges from 0.1 to 10.0; the value of d ranges from 1.0 to 60.0; the value of e ranges from 0.1 to 10.0; x is the total number of oxygen atoms required to satisfy the oxidation states of each element in the catalyst. The iron-based catalyst of this invention exhibits excellent resistance to carbon deposition during use, and when used in the FTO reaction, it can achieve high CO feedstock conversion and C2-C4 olefin selectivity.

The utility model discloses classified screening equipment for waste metal recovery, which comprises an operation table, a mounting frame is arranged on the upper portion of the operation table and fixedly connected with the operation table, a mounting plate is arranged on the side face of the mounting frame, and a collecting box is arranged on the surface of the mounting plate. A driving shaft is arranged on the inner side of the mounting frame, a driving roller is arranged on the surface of the driving shaft, and a magnetic attraction belt is arranged on the surface of the driving roller. Waste metal needing to be screened is guided into the material box, discharged through the discharging port and conveyed to the lower portion of the magnetic attraction belt through the conveying belt, the motor drives the driving shaft to rotate, so that the magnetic attraction belt rotates along with the driving shaft, the magnetic attraction belt adsorbs iron-containing metal and iron products and conveys the iron-containing metal and the iron products to the upper portion through rotation, and the iron-containing metal and the iron products are separated from each other. By means of the device, continuous operation can be achieved, and the screening efficiency is greatly improved.

The construction waste recovery device comprises a conveying assembly, a crushing assembly, a separation assembly and an iron metal recovery assembly, on the basis, in the using process, construction waste can be put into the crushing assembly, the crushing assembly crushes the construction waste, and the iron metal recovery assembly is separated from the separation assembly; crushed construction waste falls into the separation assembly, concrete and iron metal of the construction waste can be separated through the separation assembly, after separation of the construction waste is completed, the concrete and the iron metal can be put on the conveying assembly, and the iron metal can be recycled through the iron metal recycling assembly; and the concrete waste is continuously conveyed by the conveying assembly. Based on the construction waste recovery device provided by the embodiment of the invention, the iron metal in the concrete waste can be effectively recovered, and the concrete waste can also be used as recycled aggregate by separating the iron metal from concrete, so that the resource recycling efficiency is improved.

This invention relates to iron single-atom composite catalysts with a double-layered carbon dot core-carbon-nitrogen shell structure and their applications. The catalyst preparation method is as follows: carbon source, nitrogen source, and iron metal salt are dispersed in a mixed solution of solvent and coordinating agent and stirred evenly, followed by hydrothermal reaction; after the reaction, the supernatant is filtered and dialyzed, and the dialysate is freeze-dried to obtain Fe. SA / CDs material; add zinc nitrate hexahydrate and iron metal salt to deionized water, add Fe SA / CDs aqueous solution, then add the solution of 2-methylimidazole completely dissolved in deionized water, ultrasonically stir, and after the reaction, obtain Fe. SA / CDs / Fe@ZIF-8 precursor; the precursor was subjected to Joule heat treatment and cooled to room temperature to obtain an iron single-atom composite catalyst with a bilayer carbon dot core-carbon-nitrogen shell structure. This invention effectively improves the catalytic activity and stability of the catalyst in the benzaldehyde oxidative nitrification reaction.

The application discloses a metal waste sorting and recycling device for an automobile accessory processing plant, and relates to the technical field of metal waste recycling.The device comprises an H-shaped base, a conveying belt for conveying metal waste is arranged above the inside of the H-shaped base, an adsorption and recycling mechanism is arranged on the upper portion of the H-shaped base, a limiting plate is arranged on one side of the adsorption and recycling mechanism on the upper portion of each side of the H-shaped base, a limiting groove is arranged on one side of each limiting plate, a scraping mechanism is arranged to slide transversely between the limiting grooves on the two limiting plates, and a collecting mechanism is arranged inside the lower portion of the H-shaped base.The metal waste sorting and recycling device for the automobile accessory processing plant drives the scraping rod to move horizontally and linearly through the linkage mechanism, and uniformly scrapes the accumulated waste on the conveying belt.This design effectively solves the problem of waste accumulation, ensures the uniform distribution of the waste on the conveying belt, and improves the adsorption effect of the electromagnet sleeve on the iron metal.

The invention discloses a method, equipment and system for measuring the thickness of an inner wall coating of material processing equipment, and relates to the technical field of ultrasonic measurement. According to the method, an ultrasonic sensor located on the outer wall of the material processing equipment is controlled to emit an ultrasonic signal, a target signal is received through the ultrasonic sensor, and the target signal comprises a first echo signal formed through reflection of an interface of a coating and a material in the material processing equipment and a second echo signal formed through reflection of the material. According to the method, based on a target signal and an ultrasonic signal, the first transmission duration of the ultrasonic signal reaching a first interface is determined, and then the thickness of the coating is determined based on the first transmission duration and the first transmission speed of the ultrasonic signal in the coating. The thickness of the coating on the inner wall of the material treatment equipment can be measured outside the material treatment equipment, so that the material treatment equipment does not need to be disassembled, iron metal foreign matters cannot be introduced into the material, and the influence of the coating thickness measurement process on the purity of the material can be avoided.

The invention discloses a method for testing the iron metal content of a lightly boron-doped silicon polished wafer, which comprises the following steps: (1) after finishing straight pulling of a lightly boron-doped crystal bar, tumbling and cutting off, and slicing along the crystal orientation (100) through a steel wire; (2) chamfering after slicing to form an R-shaped or T-shaped edge chamfer contour; (3) grinding after chamfering, and carrying out corrosion treatment on the surface after grinding; (4) polishing the slices; (5) cleaning the silicon wafer after polishing treatment; (6) feeding the cleaned silicon polished wafer into an epitaxial furnace for annealing treatment; and (7) testing the iron metal content of the 12-inch silicon polished wafer body. According to the method, the distribution of oxygen donors in the silicon wafer is changed through annealing treatment, so that the originally gathered oxygen donors are diffused, the interference of local high-concentration oxygen donors on the bulk iron metal test is reduced, and the content of the bulk iron metal of the silicon wafer is accurately obtained. The method is simple in technological process and obvious in effect, and has a good application prospect in the field of semiconductors.

The present invention provides an organic framework derivative phototherapeutic agent containing ruthenium and iron metal atoms for photothermal and photodynamic therapy, and a preparation method and application thereof. The preparation method of the phototherapeutic agent of the present invention includes the steps of: dissolving an iron salt, a ruthenium salt, a zinc salt and 2-methylimidazole in a solvent, stirring and reacting, and then centrifuging, washing and freeze-drying to obtain a precursor; the precursor is calcined to obtain the phototherapeutic agent. The phototherapeutic agent of the present invention has good structural stability, photothermal conversion characteristics and photosensitivity; not only has the property of converting light energy into heat energy, but also has the photosensitive property of converting light energy into kinetic energy and then generating reactive oxygen species; it can be effectively used for photothermal therapy and photodynamic therapy, and thus can be used as a phototherapeutic agent for the treatment of tumor cells.

There is provided an oxygen scavenger composition comprising iron, a metal salt and water, wherein the content of water per unit surface area of the iron present on the surface of the iron, [the content of water present on the surface of the iron] (g) / {the content of the iron (g)×the specific surface area of the iron (m2 / g)}], is 0.60 g / m2 or more and 2.00 g / m2 or less.