58 results about "Oxygen adsorption" patented technology

The invention relates to the field of fabric preparation, in particular to a cold-proof and oxygen-resistant fabric applied to extreme working conditions and a preparation method of the cold-proof and oxygen-resistant fabric. The fabric is formed by compounding a honeycomb base body outer layer, a middle buffer layer and a functional inner layer. The outer layer is hexagonal honeycomb grid base cloth formed by weaving basalt filaments and PTFE modified polyimide core-spun yarns, and composite colloid is injected for stepped curing; the middle layer is formed by sewing a silicon dioxide aerogel felt subjected to electrostatic spraying of paraffin microcapsules and a flame-retardant pre-oxidized fiber felt; and the inner layer is an oxygen adsorption layer formed by activating polyimide / flame-retardant viscose blended yarns and then grafting the activated polyimide / flame-retardant viscose blended yarns with a ZIF-8 material. All the layers are separated through polybenzimidazole membranes, and the composite fabric with excellent cold resistance, flame retardance, oxygen resistance and structural stability is finally obtained through gradient hot pressing, water-cooling shaping and surface flame-retardant coating treatment and is suitable for protective equipment in an extreme environment.

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 belongs to the technical field of oxygen production, and particularly relates to low-pressure variable-pressure oxygen adsorption equipment which comprises an air compressor, a filter, a buffer tank, an oxygen storage tank and two groups of adsorption towers, and each group of adsorption towers is composed of an initial-end adsorption tower and a tail-end adsorption tower which are connected in series. The device further comprises a first valve assembly, a second valve assembly, a third valve assembly, a fourth valve assembly, a fifth valve assembly, a sixth valve assembly, a seventh valve assembly, an eighth valve assembly and a ninth valve assembly. The first valve assembly switches the two initial-end adsorption towers to be communicated with the buffer tank by collecting the same-end pressure difference of the same-end adsorption towers in the two sets of adsorption towers. The two groups of adsorption towers are automatically switched by using the pressure difference of the same ends of the two adsorption towers at the same end in the two groups of adsorption towers, so that the related structure for realizing the automatic switching is simple, and the cost is relatively low.

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.

This invention relates to the field of catalyst preparation, specifically disclosing a PEM water electrolysis hydrogen production catalyst material and its preparation method. Using a manganese-cobalt-samarium metal composite oxide as a support, iridium oxide is loaded onto it, forming a unique catalyst composite material structure. During the preparation process, by precisely adjusting the metal addition ratio and optimizing process parameters and preparation sequence, not only is a low iridium content ensured, but the catalyst's activity and stability are also significantly improved. The excellent electrical conductivity of the manganese-cobalt-samarium metal composite oxide, along with the crystallization of iridium oxide on its substrate, effectively improves electron binding, increases binding sites, and optimizes oxygen adsorption capacity. This allows the catalyst composite material to maintain high catalytic performance while achieving effective cost control, laying a solid foundation for its widespread application.

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 powder photocatalyst technology, specifically disclosing a self-floating triazine-based polymer nanosheet photocatalyst, its preparation method, and its application. The preparation method involves using melamine and 4,4'-biphenyl dicarboxylic acid to prepare a supramolecular precursor, which is then calcined and placed in a mixed solution of acetone and ethanol for prolonged light irradiation to obtain Pt nanoparticle-supported self-floating triazine-based polymer. This polymer can stably float on water and possesses oxygen adsorption capabilities, allowing it to adsorb oxygen from the air and participate in the photocatalytic H2O2 production reaction. This eliminates the need for additional catalytic material deposition on a buoyancy medium, solving the problem that most existing powder photocatalysts require additional catalytic material deposition on a buoyancy medium to achieve stable floating on water. Furthermore, the preparation method provided by this invention is simple and has broad market prospects.

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 carbon molecular sieve according to the present invention has a half-value width of a main peak in an oxygen adsorption rate constant distribution of 0.35 sec-1 or less, and a specific surface area of 300-600 m2 / g (inclusive) as determined by the BET method from a CO2 adsorption isotherm at 25 DEG C.

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 utility model discloses an efficient oxygen generation system capable of realizing heat exchange and energy recovery, which relates to the technical field of oxygen generation equipment and comprises an air compressor, a gas filter, an adsorption tower, a heat exchange component and an energy recovery component. Air is subjected to three-layer filtration by a gas filter and then enters a compressor, compressed air enters an adsorption tower, and a nitrogen strong adsorption molecular sieve is used for oxygen production. Waste gas of the adsorption tower is guided into the heat exchange component, cold air and hot waste gas are subjected to efficient heat exchange through a copper pipe and a spiral turbulent flow metal sheet in the heat exchange component, preheated air is recycled, and the waste gas subjected to heat exchange enters the energy recovery component to drive a turbine to drive a generator to generate electricity. Impurities in air are effectively removed, oxygen production purity and stable operation of equipment are guaranteed, energy consumption is greatly reduced through heat exchange and energy recovery, and the energy utilization rate is increased.

The application discloses a kind of gas purification device and glove box and regeneration method, comprising: air inlet pipeline;Air outlet pipeline;Adsorption column;Oxygen adsorption material layer is arranged in the adsorption column;Circulating fan;Regeneration device.The application completely changes the irreversible chemical adsorption oxygen-removing material and high temperature and hydrogen regeneration process in the prior art, but uses reversible adsorption oxygen-removing material and inert gas purging or vacuum physical method, using the reversibility of the combination of oxygen adsorption material and oxygen molecule and the mechanism affected by oxygen gas pressure, so that the oxygen molecule adsorbed by oxygen adsorption material is separated from the adsorption state, and the oxygen adsorption function of oxygen adsorption material is recovered by using inert gas purging or vacuum device.According to actual needs, (1) vacuum can be used;Or (2) normal pressure or low pressure inert gas purging;Or (3) multiple inert gas filling and vacuum way;Or (4) the above-mentioned 3 kinds of ways auxiliary heating, realize the regeneration of oxygen adsorption material.Overcome the complex and safe hidden trouble of hydrogen reduction regeneration process at about 200 DEG C currently used.

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 application provides a high-entropy ceramic oxygen adsorbent material and a preparation method thereof, relates to the technical field of ceramic materials, and aims to solve the technical problems of high sintering temperature and working temperature and low adsorption capacity during preparation of an oxygen adsorption medium. 2.5 Al 0.5 Fe 0.5 Ni 0.5 O7, and R is at least five of Yb, La, Pr, Sm, Ce and Gd. The nano high-entropy ceramic oxygen adsorbent material synthesized by the method can realize controllable powder particle size, has the advantages of low working temperature, large oxygen adsorption capacity, fast oxygen adsorption / desorption rate, high cycle stability and the like. The method has the advantages of simplicity, low cost, convenience, rapidness, high purity of prepared samples and the like, and can be mass-produced.

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 invention relates to a high-performance environment-friendly oxygen separation membrane and a preparation method thereof, and aims to provide an efficient and environment-friendly oxygen separation solution for the fields of medical treatment, chemical engineering and the like so as to overcome the defects that a traditional oxygen separation technology is high in energy consumption and complex in equipment, and an existing gas separation membrane is insufficient in selectivity, not environment-friendly in modification process and difficult to produce on a large scale. Hybrid nanoparticles of a metal organic framework (MOFs) and a covalent organic framework (COFs) are introduced into a polytetramethyl-1-pentene (PMP) matrix, a wet spinning technology is combined with a green solvothermally induced phase separation (TIPS) method, and functional modification of plasma grafting and electrochemical deposition is combined, so that the PMP film with a multifunctional surface is formed. The method is characterized in that a bio-based solvent is innovatively selected to replace a traditional toxic diluent, and hydrophobicity and oxygen adsorption capacity are enhanced through surface functionalization; the MOFs / COFs hybrid system is introduced into PMP membrane preparation for the first time, full-life-cycle environment-friendly design is achieved, remarkable advantages are provided for efficient oxygen separation from green bio-based solvent selection to waste recycling, and the dual-carbon target is assisted to be achieved.

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.