40 results about "Oxygen adsorption" patented technology

The present application provides a kind of biomass gasification coupling SOEC co-electrolysis system and process of green fuel, the present application is coupled with biomass gasification and solid oxide electrolytic cell (SOEC) co-electrolysis synthesis gas path, with forestry waste biomass as raw material, adopt oxygen-carrying-CO2 adsorption functional material, construct gasification-adsorption integrated and SOEC co-electrolysis deep coupling system;System includes gasification unit, first heat exchange unit, gas purification unit, regeneration oxidation unit, SOEC electrolysis unit and fuel synthesis unit;With wind power, photovoltaic and other green electricity as SOEC electrolysis unit driving energy, integration biomass directional conversion, CO2 in situ capture-function material regeneration cycle, SOEC high temperature co-electrolysis is integrated, rely on heat cascade utilization, achieve system material closed loop reuse;By adjusting the amount of water vapor in the system, obtain specific hydrogen carbon ratio synthesis gas, so as to realize the production of green fuel, whole process saves traditional water gas shift process, improve system energy efficiency, avoid carbon loss, reduce high temperature energy consumption.

The invention discloses an opencast coal mine coal spontaneous combustion incubation period prediction method suitable for a negative temperature condition, and relates to the technical field of coal spontaneous combustion prediction. The method comprises the following steps: firstly, carrying out an oxygen adsorption dynamic experiment on a to-be-detected coal sample at a constant temperature of-20 to 100 DEG C to obtain a low-temperature oxygen adsorption rate constant and establishing a function relationship between the low-temperature oxygen adsorption rate constant and the temperature; secondly, calculating ice melting latent heat according to the ice content in the coal sample to be detected, and introducing the ice melting latent heat as a key energy loss item into the heat-mass transfer model of the coal pile; further, establishing a coal pile energy balance equation comprehensively considering oxidation heat release, ice melting latent heat consumption and a heat dissipation process; and finally, solving the equation through a numerical method, and calculating the time required by the coal pile from the initial negative temperature rise to the critical spontaneous combustion temperature so as to obtain the accurate coal spontaneous combustion latency. The method is particularly suitable for mines in cold regions, surface mines and winter coal storage yards.

The application discloses a lithium type X molecular sieve adsorbent and a preparation method thereof, and belongs to the technical field of adsorption separation. The preparation method of the lithium type X molecular sieve adsorbent comprises two steps of preparing a low-silicon aluminum X molecular sieve and ion exchange. The lithium type X molecular sieve adsorbent prepared by the method has a lithium ion exchange degree of 97.9-99.1%, a molar ratio of SiO2 and Al2O3 of 2.01-2.10, a nitrogen adsorption amount of 32.62-34.94 mL / g, an oxygen adsorption amount of 2.40-2.75 mL / g, and a nitrogen-oxygen separation coefficient of 11.86-14.56.

The utility model belongs to the technical field of air separation, and particularly discloses an internal compression air separation poor krypton xenon extraction device and a start-stop control system, which comprise a lower tower, a main cooler, an upper tower, a gas-liquid separator, a liquid oxygen evaporator, a liquid oxygen adsorber, a liquid oxygen pump and a liquid jet evaporator, all the devices are communicated through pipelines, liquid oxygen is buffered through the gas-liquid separator before entering the liquid oxygen pump, the capacity of rapidly switching two working conditions of producing poor krypton xenon and not producing poor krypton xenon is achieved, and due to the fact that the gas-liquid separator does not participate in heat exchange and rectification, potential safety hazards do not exist in the change of the liquid level of the gas-liquid separator. Therefore, the safety of rapid working condition switching equipment can be guaranteed, and stable working condition operation of the main tower is guaranteed.

This invention provides a method for detecting the oxygen recombination efficiency of AGM batteries, belonging to the field of lead-acid battery technology. The method first weighs the oxygen adsorption device to obtain m1, and then charges a fully charged battery until a mixed gas is released. The resulting mixed gas is then subjected to deacidification and drying, and then adsorbed by the oxygen adsorption device to obtain the remaining gas. After oxygen testing, the test continues. After t hours of testing, the oxygen adsorption device is weighed to obtain m2. Then, according to n1=(m2-m1) / M 氧 Calculate the amount of oxygen contained in the battery under test, n1; then select a supersaturated battery and determine the oxygen content using the above steps to obtain the amount of oxygen contained in the supersaturated battery, n2; finally, apply the formula η 氧气 The oxygen recombination efficiency of the battery under test can be obtained by calculating (n2-n1) / n2. The detection method of the present invention can ensure that the gas values ​​of collected oxygen are more reliable.

The present disclosure relates to a water splitting catalyst including a porous carbon layer, a bimetallic metal alloy core dispersed on the porous carbon layer, and a single-atom precious metal dispersed on the bimetallic metal alloy core, in which oxygen is adsorbed on the surface of the bimetallic metal alloy core.

The invention provides a rainwater bioretention facility capable of removing halogenated benzene pollutants, and belongs to the technical field of water treatment.The rainwater bioretention facility comprises a plurality of treatment units which are arranged in a stepped mode and each comprise a pond body, a planting filler layer, a dissolved oxygen adsorption filler layer, a dechlorination filler layer and a first gravel layer, and the planting filler layers, the dissolved oxygen adsorption filler layers, the dechlorination filler layers and the first gravel layers are sequentially arranged in the pond bodies from top to bottom; a water outlet is formed in the lower part of the rear side of the tank body of the lowest treatment unit, and L-shaped pipes arranged at the lower parts of the tank bodies of the rest treatment units are connected with the next-stage treatment unit; except the first-stage treatment unit, transparent step-shaped stop blocks and splash plates are arranged above the planting filler layers of the other treatment units at intervals; and a plurality of herbaceous plants are planted on the planting filler layer. The bioretention facility can effectively remove toxic halogenated benzene series pollutants in rainwater, avoid the toxic action of the halogenated benzene series pollutants on nitrification and denitrification microorganisms, guarantee the efficient denitrification efficiency of the bioretention facility, effectively intercept particulate matters in the rainwater, avoid filler blockage and prolong the service life.

The application relates to the field of coating materials, and discloses a pure titanium material coating sensor for detecting low-concentration ammonia gas as well as a preparation method and application of the sensor. The sensor comprises a pure titanium material, a micro-arc oxidation coating and an electrode; the micro-arc oxidation coating is arranged on the surface of the pure titanium material through micro-arc oxidation of a sodium silicate, sodium stannate trihydrate and zinc acetate electrolyte; and the electrode is arranged on the micro-arc oxidation coating. The SnO2 / TiO2 coating capable of being applied to the detection of low-concentration ammonia gas under a high-humidity environment is formed on the surface of the pure titanium material through micro-arc oxidation of the composite electrolyte of sodium silicate, zinc acetate and sodium stannate trihydrate; the electrode is arranged, and the oxygen adsorption-desorption principle is utilized for detection; compared with conventional gases, the sensor exhibits excellent sensitivity and selectivity to ammonia gas, and therefore can effectively, timely and simply detect ammonia gas.

The invention relates to the technical field of lithium ion batteries, and discloses slurry for a battery diaphragm, the battery diaphragm, application of the battery diaphragm and a lithium ion battery. The slurry contains a main agent and an auxiliary agent, and the main agent contains an oxygen adsorbent and an oxygen fixing agent; the oxygen adsorbent is a zeolite molecular sieve, and the oxygen fixing agent is oxygen-deficient titanium dioxide; the content mass ratio of the oxygen adsorbent to the oxygen fixing agent is 1: (0.1-10). The slurry provided by the invention is coated on a diaphragm, so that oxygen in a battery can be reduced, the problem of battery expansion caused by gas production of a lithium-rich nickel-based lithium supplementing agent is solved, the safety risk of the battery is reduced, and the cycle life and the safety of the battery are improved.

The invention relates to the technical field of metal materials, in particular to an antioxidant steel component design method based on first principle calculation, which comprises the following steps: constructing an initial surface model, calculating oxygen adsorption energy and adsorption configuration, screening alloy elements and constructing a surface adsorption model. And the influence of alloy elements on the surface adsorption energy of oxygen molecules in the Fe (100) surface model is determined, so that component screening, optimization and design are carried out on the anti-oxidation steel. Through the introduction of first principle calculation, the trial and error cost and period of component design are greatly reduced, the oxidation resistance of the steel is remarkably improved, and the service life of the steel in a high-temperature environment is prolonged.

The invention discloses application of a Zn2In2S5 / PDA photocatalytic material with a photo-thermal synergistic effect, and belongs to the technical field of photocatalytic composite materials and hydrogen peroxide (H2O2) production. The Zn2In2S5 / PDA photocatalytic material is used for photocatalytic production of H2O2, and the catalytic rate of the Zn2In2S5 / PDA photocatalytic material can reach 9180 [mu] M.h <-1 >. G <-1 >. The material is prepared through an in-situ polymerization method and comprises the following steps: firstly, carrying out hydrothermal synthesis on Zn2In2S5 nanoflowers, and then adding dopamine hydrochloride into a weakly alkaline solution containing Zn2In2S5 to carry out in-situ auto-polymerization, so as to obtain the PDA modified Zn2In2S5 composite material. According to the invention, the p-n type heterojunction is successfully constructed, the introduction of PDA not only widens the photoresponse range to the full spectrum, but also improves the microcosmic temperature of the surface of the catalyst by using the photothermal effect of PDA, effectively promotes the separation and transmission of photon-generated carriers, and optimizes the oxygen adsorption capacity. Compared with pure Zn2In2S5, the photocatalytic H2O2 production performance of the composite material is remarkably improved, the preparation process is simple, the structure is stable, and a new way is provided for efficient H2O2 production.

The invention relates to the technical field of integrated circuit manufacturing, and discloses a multilayer composite ceramic metal packaging method for a high-temperature pressure sensor, and the method comprises the steps: executing atmosphere chemical potential pinning operation when the temperature of a sintering furnace enters a maximum shrinkage rate temperature region of a metalized functional layer; the dew point is increased to a pinning set value by adjusting the wet-hydrogen ratio of the process gas, so that the oxygen partial pressure is in a metastable state interval of oxidation-reduction reaction balance; according to the method, by introducing a chemical potential control dimension independent of a thermal field and utilizing a metastable state oxygen adsorption micromechanism, excessive shrinkage of the refractory metal in a specific temperature zone is inhibited in a targeted mode, and therefore the thermal field of the refractory metal can be effectively controlled. Transient shear stress generated by dynamic mismatch of a heterogeneous interface is eliminated, and the air tightness and the mechanical stability of the packaging structure under the high-temperature working condition are improved.

The invention provides an integrated buried rural black and grey water reclamation device, and relates to the technical field of sewage treatment, the integrated buried rural black and grey water reclamation device comprises a device body, the device body is internally provided with a cavity, and the cavity internally comprises a septic unit, a main body reaction unit and a tail water recovery unit which are sequentially arranged along the flowing direction of black and grey water; the septic unit comprises a first septic area, a second septic area and a third septic area which are communicated in sequence, a blow-off pipe is arranged at one end of the device body, one end of the blow-off pipe is communicated with the input end of the first septic area through a connecting pipe, and the main body reaction unit comprises an anaerobic area, an anoxic area, an aerobic adsorption area and an aerobic oxidation area which are communicated in sequence. The anaerobic zone is communicated with the third septic zone, and the aerobic oxidation zone is communicated with the tail water recovery unit. The device body does not need to be provided with any power driving devices such as a lifting water pump and an air blower in the operation process, black and grey water naturally flows through the septic unit, the main body reaction unit and the tail water recovery unit under the action of gravity, and the energy consumption and the operation cost are reduced.

The application discloses a kind of composite adsorbing material for nitrogen production process and its preparation method, it is related to gas separation material technical field.The composite adsorbing material includes: surface modification carbon molecular sieve 30~50 parts, modified silica gel 20~40 parts, silicon solution 5~10 parts, nano alumina 2~5 parts;Surface modification carbon molecular sieve is carbon molecular sieve after acid solution oxidation treatment, and modified silica gel is silica gel after modification treatment by ammonium salt solution.The preparation method includes: respectively surface modification and modification are carried out to carbon molecular sieve and silica gel;Mixing, crushing and sieving;Add silicon solution, nano alumina and water to pulp;Compression molding;Cooling after high-temperature sintering under protective atmosphere.The application enhances oxygen adsorption and impurity adsorption capacity by surface modification, improves stability and strength by combining silicon solution and nano alumina, realizes efficient nitrogen-oxygen separation and simultaneously removes impurities, simplifies nitrogen production pretreatment, improves nitrogen purity and nitrogen production efficiency, and the process is simple and easy to industrial production.

This utility model discloses a pressure swing adsorption (PSA) oxygen generation adsorption tower, relating to the technical field of gas separation equipment, including a tower body structure, a base structure, a pressure swing structure, and a transmission structure. The tower body structure sequentially comprises an inlet chamber, a first molecular sieve layer, an intermediate chamber, a second molecular sieve layer, and an outlet chamber. The base structure converts rotational motion into linear reciprocating motion via a drive motor, a geared disc, a transmission wheel, and an eccentric rod. The pressure swing structure includes a first air bladder and a second air bladder connecting the inlet chamber and the intermediate chamber, with spring-loaded pressure plates connected to their bottoms. The transmission structure drives a first cam and a second cam with a 90° phase difference via a rack and pinion to alternately compress the air bladders. During operation, the compression of the first air bladder increases the air pressure in the inlet chamber, while the expansion of the second air bladder reduces the air pressure in the intermediate chamber, creating a pressure difference that accelerates gas transport; conversely, it enhances the inlet efficiency. This design integrates a self-generating gas pressure mechanism, eliminating the need for an external gas source system, and offers advantages such as compact structure, low energy consumption, and high gas transmission efficiency.

This invention relates to the field of catalyst preparation technology, and discloses a catalytic oxidation catalyst, its preparation method, and its application. The catalytic oxidation catalyst comprises: a support, wherein the support is an acid-treated structured support; a coating attached to the support, the coating containing ZSM-5 molecular sieve and optionally a metal oxide; and an active component dispersed in the coating, the active component containing a noble metal and optionally an alloy metal; wherein the coating has a particle size of 50-500 nm, a mesopore size of 3-50 nm, and a specific surface area of ​​300-600 m². 2 / g, wherein the particle size of the active component is 1-8nm. The catalytic oxidation catalyst of the present invention has high oxygen adsorption and activation capacity, high catalytic oxidation efficiency, high mechanical strength, and is suitable for high space velocity and large volume gas processing conditions; moreover, the pore structure of the catalyst coating matrix is ​​adjustable, which has the advantages of strong quantitative adjustment and strong raw material adaptability.

The application discloses an olefin-connected pyridyl covalent organic framework material and a preparation method and application thereof, and belongs to the technical field of photocatalysis. The material is formed by olefin bridging of 2,4,6-trimethyl-1,3,5-triazine monomers and aromatic aldehyde monomers containing pyridine units and bipyridine units, and 2,4,6-trimethyl-1,3,5-triazine, pyridine-2,5-dimethyl formaldehyde or 2,2'-bipyridine-5,5'-dimethyl formaldehyde are heated and reacted under sealed conditions; after the reaction is completed, natural cooling to room temperature is carried out, vacuum filtration is carried out and filter residues are collected, washing is carried out, and vacuum drying is carried out, and the material is obtained. The pyridine and bipyridine units are used for constructing different oxygen adsorption modes of Pauling type and Yeager type respectively, the oxygen reduction reaction path is changed, a two-step single electron path and a one-step two electron path are realized, the photocatalytic efficiency is effectively improved, and the material has a wide application prospect as a photocatalyst for photocatalytic oxygen reduction and synthesis of hydrogen peroxide.

The invention discloses a solid-state zinc-air battery and a preparation method thereof. The solid-state zinc-air battery comprises a catalyst positive electrode, a conductive titanium sheet, carrier gel and a battery negative electrode, and a catalyst of the catalyst positive electrode is formed by dispersing metal iridium on the surface of reduced graphene oxide; and the surface of the battery negative electrode is provided with a protective film with the thickness of 50-120nm. According to the invention, metal iridium is uniformly distributed on the surface of porous reduced graphene oxide and in holes, a metal catalyst is anchored on the surface of rGO, and loss of Ir is inhibited, so that precise regulation and control of oxygen adsorption capacity are realized, the catalytic effect of the battery is improved, and the cost is reduced.

The application discloses an ionic COF catalyst, a preparation method thereof and application of the catalyst in photocatalytic production of hydrogen peroxide. The catalyst is prepared from 2,4,6-triformylphloroglucinol and a phenanthridine monomer containing a double amino group through Schiff base condensation reaction under catalysis of acetic acid in a mixed solvent, and has an ionic covalent organic framework structure connected with beta-ketoenamine. The catalyst prepared by the application has irregular sheet-like agglomeration, a layered porous structure, a high specific surface area and a controllable ionic microenvironment, and can simultaneously strengthen oxygen adsorption activation and photogenerated carrier separation efficiency. When the catalyst is applied to photocatalytic production of hydrogen peroxide, efficient production of hydrogen peroxide can be realized under the conditions of pure water, visible light and no sacrificial agent, and the yield can reach 457 μM h ‑1 The application provides a green, mild and sustainable new solution to solve the problems of high energy consumption and high pollution of the traditional anthraquinone method and the bottleneck problem of the existing COF photocatalytic performance.

The invention provides a coal gasification fine slag-biochar porous composite fuel and a preparation method and application thereof, and belongs to the technical field of composite fuels, the porous composite fuel uses biochar prepared from industrial by-product coal gasification fine slag and agricultural waste as a base material, and a foaming agent composed of a foaming agent A and a foaming agent B is matched to prepare the porous composite fuel. Forming a porous structure through a foaming process; the base material raw material is a core framework of the porous composite fuel, the foaming agent is used for constructing a porous form of the porous composite fuel, and the base material raw material and the foaming agent have a synergistic effect, so that the porous composite fuel meets the raw material requirement of a liquid oxygen fracturing scene. The problems that in the prior art, the liquid oxygen adsorption amount is low, the ignition point temperature is high, combustion is incomplete and the blasting power is insufficient are solved, recycling of the coal gasification fine slag and agricultural waste is achieved, only CO2 and H2O are produced through thermal decomposition of the prepared porous composite fuel, and toxic emission is avoided; and the requirements of green blasting and rock crushing in the field of liquid oxygen fracturing can be efficiently met.

The application discloses a kind of carbon nitride photocatalyst based on multiple asymmetric active sites in hydrogen peroxide production application. Sulfur-doped carbon nitride nanotubes are synthesized by thermal polymerization method, and then a photocatalytic material S-CNT-Zn is obtained by impregnation-calcination method, in which zinc monatomic atoms are loaded on the sulfur-doped carbon nitride nanotubes. The preparation process is simple, and the preparation process is simple. The carbon nitride photocatalyst with multiple asymmetric active sites can break the symmetry of carbon nitride material, form a gradient charge distribution, realize multi-path charge transfer, and promote the migration and separation of carriers. And zinc monatomic atoms as oxygen adsorption sites can promote the adsorption of oxygen and reduce the formation energy barrier of intermediates. In the visible light driven oxygen reduction synthesis of hydrogen peroxide, the carbon nitride photocatalyst with multiple asymmetric active sites maintains the stability of the catalyst and high hydrogen peroxide yield, thereby realizing clean, stable and efficient photocatalytic reduction of oxygen to synthesize hydrogen peroxide.

The application relates to a preparation method and application of a cerium monatomic-anchored polyhydroxyl porphyrin covalent organic framework-based photocatalyst, and relates to a preparation method and application of a photocatalyst. The application aims to solve the problems that the existing technology has low light-generated carrier separation efficiency, lacks oxygen adsorption sites and catalytic active centers for oxygen reduction in preparation of a porphyrin-based covalent organic framework photocatalyst. In the application, a ligand 5, 10, 15, 20-tetrakis(4-aminophenyl) porphyrin and a linker 2, 5-dihydroxy terephthaldehyde are selected in a preparation stage, an imine condensation reaction is carried out under the action of an acetic acid initiator to form an imine bond, and the introduction of a carboxyl group is realized through a Doebner three-component reaction of pyruvic acid. The pyruvic acid serves as a nucleophilic reagent, attacks a carbon atom in the imine bond, and nucleophilic addition-cyclization-aromatization are carried out to produce a 4-carboxy quinoline bond, so that a polyhydroxyl porphyrin COF catalyst is formed. The polyhydroxyl porphyrin COF is adsorbed with cerium atoms in methanol in which nitric acid cerium is dissolved, stirring is carried out, and finally, a cerium monatomic-anchored polyhydroxyl porphyrin COF photocatalytic material is formed.

The present application relates to the technical field of corrosion inhibitor, especially to a modified nano-lignin sulfonate corrosion inhibitor and its preparation method and application, which comprises the following raw materials: lignin sulfonate, potassium persulfate, methacryloyloxyethyl trimethyl ammonium chloride and tetrahydrofuran; the mass ratio of lignin sulfonate, potassium persulfate and methacryloyloxyethyl trimethyl ammonium chloride is 0.1-1:0.01-0.05:0.3-3.The technical scheme provided by the present application grafts methacryloyloxyethyl trimethyl ammonium chloride onto nano-lignin sulfonate through polymerization reaction to synthesize modified nano-lignin sulfonate corrosion inhibitor, which has multiple nitrogen and oxygen adsorption sites, can provide lone pair of electrons to form coordination bond with iron atom, so that the corrosion inhibitor molecules can be better adsorbed on the metal surface to slow down the corrosion process.

The invention provides a full-light-operated artificial synaptic device based on an oxygen plasma modified single-walled carbon nanotube film and a preparation method of the full-light-operated artificial synaptic device, and belongs to the technical field of neuromorphic calculation and microelectronic devices. According to the device, Si / SiO2 is adopted as a substrate, Au is adopted as a planar electrode, and a single-walled carbon nanotube (SWCNT) film is adopted as a photoelectric memristor layer. According to the preparation method, oxygen-containing functional groups are actively grafted on the surfaces of the carbon nanotubes through an oxygen plasma treatment technology, and a high-density and reversible oxygen adsorption / desorption active center is constructed; according to the invention, capture and release of environmental oxygen molecules by an active center are stimulated and regulated by light with different wavelengths, and full-light-control bidirectional control of synaptic plasticity is realized: under irradiation of 650nm visible light, adsorption of the oxygen molecules at the active center is promoted and electrons in a single-walled carbon nanotube film are captured, so that hole concentration is increased, and the device outputs excitatory post-synaptic current (EPSC); when 365nm ultraviolet light irradiation is switched, photon-generated carriers drive oxygen molecules to desorb, electron-hole recombination is accelerated, and hole concentration is reduced, so that an inhibitory post-synaptic current (IPSC) is generated. The full-light-operated artificial synapse device is simple in structure, the size of the device can be reduced to the nanometer magnitude, reversible adjustment of the conductivity change range can be achieved by means of visible / ultraviolet light signals, and a reliable hardware basis is provided for constructing a neuromorphic visual system with high performance and high integration level.

The application relates to the technical field of oxygen generators, in particular to a low-resistance pressure swing adsorption structure based on a bionic flow channel and an oxygen generator. An adsorption auxiliary assembly is arranged at the bottom end of the inner cavity of an adsorption tower main body to improve the oxygen adsorption and collection efficiency, that is, the adsorption and collection efficiency of oxygen is improved by arranging a supporting disc body and uniformly arranging a plurality of first ventilation holes on the supporting disc body; and the supporting disc body is supported by an arranged mounting cover, and a spacing cavity is formed between the two, which avoids the plugging of the oxygen absorption flow channel caused by the spherical molecular sieve in the adsorption tower main body; the application also arranges a connecting fitting at the top of the supporting disc body, that is, an auxiliary disc piece is arranged and a second ventilation hole is uniformly arranged in the auxiliary disc piece, a plugging prevention supporting cone head is equidistantly arranged at the top hole position of the second ventilation hole, and the spherical molecular sieve is supported, so that the plugging of the second ventilation hole caused by the spherical molecular sieve is avoided, and the pressure of oxygen adsorption and collection is reduced.

To provide a packaging material that can stably preserve the contents of cosmetics and other products containing specific components that are prone to deterioration due to oxygen adsorption over a long period of time. [Solution] A package 1 comprising: contents 10 containing at least one selected from the group consisting of retinol, retinol derivatives, ascorbic acid, ascorbic acid derivatives, and salts thereof; an inner container 20 containing the contents 10; an oxygen adsorbent 50; and a bag 60 in which the contents 10, the inner container 20, and the oxygen adsorbent 50 are sealed and contained.

The invention provides a method for forming an MTJ (Magnetic Tunnel Junction) barrier layer thin film, which comprises the following steps of: executing a chamber environment treatment step before depositing the barrier layer thin film: bombarding a first target material in a radio frequency sputtering manner to form an oxygen adsorption layer on the inner wall of the periphery of a chamber; performing oxygen treatment on the chamber, providing oxygen atoms, and combining the oxygen adsorption layer with the oxygen atoms; and a barrier layer thin film deposition step is executed, specifically, a second target material is bombarded in a radio frequency sputtering mode, and metal atoms bombarded from the second target material attract oxygen atoms combined with the oxygen adsorption layer in the deposition process and supplement the oxygen atoms to the formed MTJ barrier layer thin film. According to the invention, the crystal structure and the quality of the MTJ barrier layer thin film can be optimized.

This invention discloses a method for preparing a spherical zinc-tin composite metal oxide and its application as a gas-sensitive sensing material. The invention prepares a spherical ZnSn-LDHs precursor, which, after calcination, yields porous spherical ZnO / SnO2. Macroscopically, the spherical structure has a large specific surface area and porosity, increasing the reaction area. The formation of mesopores increases gas permeability, effectively enhancing the reaction between the analyte gas and the gas-sensitive material. Microscopically, it possesses a large number of oxygen vacancies, activating the surface, increasing surface energy and activity, and enhancing oxygen adsorption. This results in a thicker depletion layer, increasing the initial resistance and leading to higher sensitivity and response values. The porous spherical zinc-tin composite metal oxide, as an H2S gas-sensitive sensing material, exhibits a fast response recovery time and excellent H2S selectivity. Furthermore, it has a simple structure, a simple working principle, low cost, and can be mass-produced.

The utility model discloses an easy-to-adjust pressure tower device of a VPSA (Vacuum Pressure Swing Adsorption) oxygen production adsorption tower. The easy-to-adjust pressure tower device comprises a tower body, a movable plate arranged in the tower body and a hollow plate nested and attached to the inner side of the left lower end of the tower body, a pressure regulating structure is arranged outside the movable plate, the pressure regulating structure comprises a first electromagnetic valve, an external connecting pipe, an electric telescopic rod, a limiting sleeve, a limiting rod and a sealing ring, and the first electromagnetic valve is fixedly mounted on the inner side of the upper end of the tower body; a pressure control structure is arranged on the inner side of the left end of the tower body and the inner side of the left end of the movable plate. The pressure control structure comprises a pressure sensor, a displayer, a controller and a second electromagnetic valve. According to the easily-adjusted pressure tower device of the VPSA oxygen production adsorption tower, the pressure tower device can conveniently adjust the pressure of the adsorption tower, sealing is conveniently guaranteed, pressure sensing regulation and control are convenient, the purpose of accurately adjusting the pressure of the adsorption tower is achieved, pressure-adjusted air is conveniently purified, the influence of pressure adjustment on the adsorption tower is avoided, and an activated carbon purification plate is conveniently replaced.

The invention provides a pressure swing adsorption oxygen production device, and belongs to the technical field of oxygen preparation, the pressure swing adsorption oxygen production device comprises a shell and an oxygen enrichment mechanism installed in the shell, the oxygen enrichment mechanism comprises two molecular sieve extensions, a dust removal assembly and a reverse blowing reversing valve, the two molecular sieve extensions are arranged parallel to the front wall and the rear wall of the shell, and the dust removal assembly is arranged in the shell. Oxygen-enriched membranes are arranged on the front and rear sides of the molecular sieve extensions, the dust removal assembly comprises four mounting frames which are located on the front and rear sides of the two molecular sieve extensions correspondingly and are parallel to the molecular sieve extensions, a plurality of connecting water pipes are mounted in the mounting frames, are in a net shape and communicate with one another, and dust removal nozzles are arranged on the sides, close to the molecular sieve extensions, of the connecting water pipes; the top and the bottom of the dust removal assembly are provided with transmission assemblies used for driving installation frames on the front side and the rear side of the molecular sieve separator to get close to the dust removal assembly. The floating dust on the oxygen-enriched membrane can be comprehensively and effectively removed, and the situation that the floating dust affects the oxygen adsorption and collection effect of the oxygen-enriched membrane and reduces the oxygen production efficiency of the oxygen production device is avoided.