458 results about "Oxygen rich" patented technology

This disclosure relates to the adsorption and separation of fluid components, such as oxygen, in a feed stream, such as air, using zeolite ITQ-55 as the adsorbent. A process is disclosed for adsorbing oxygen from a feed stream containing oxygen, nitrogen and argon. The process comprises passing the feed stream through a bed of an adsorbent comprising zeolite ITQ-55 to adsorb oxygen from the feed stream, carrying out an equalization step to improve recovery, thereby producing a nitrogen product stream depleted in oxygen as well as a waste stream can be collected to have enriched oxygen. The feed stream is exposed to the zeolite ITQ-55 at effective conditions for performing a rapid cycle of kinetic separation, in which oxygen exhibits greater kinetic selectivity than nitrogen and argon.

The invention discloses an oxygen-enriched destressing crystal growth method and a crystal growth furnace, and relates to the technical field of crystal growth, and the oxygen-enriched destressing crystal growth method comprises the following steps: step 1, pre-treating a PMNT polycrystal material, and putting the pretreated PMNT polycrystal material into a crucible; 2, pre-flushing the growth furnace and creating an oxygen partial pressure environment; 3, raising the temperature in the growth furnace to melt and homogenize the PMNT polycrystal material in the crucible; step 4, the crucible moves downwards for directional solidification of the crystal, a solid-liquid interface is formed and stably moves upwards, and in the process, a dynamic regulation and control strategy is adopted in the growth furnace to control an oxygen-enriched environment to promote crystal growth, so that the crystal digests growth stress in the growth process, and formation of oxygen vacancies is inhibited; and step 5, after crystal growth is finished, gradient cooling is performed to room temperature in an oxygen-enriched environment, and a crystal ingot is obtained. Oxygen is used as a regulation and control tool, the stress problem caused by oxygen vacancy is physically solved, the color center and performance problems caused by oxygen vacancy are chemically solved, and the crystal growth quality is improved.

The utility model provides refrigeration equipment. The oxygen adjusting device comprises an oxygen adjusting storage container and an electrolysis oxygen adjusting module, the oxygen adjusting module is arranged in the oxygen adjusting container so that the oxygen-rich atmosphere or the oxygen-poor atmosphere can be supplied to the oxygen adjusting container, the oxygen adjusting container comprises a first oxygen adjusting container body and a second oxygen adjusting container body, the first oxygen adjusting container body is arranged in the second oxygen adjusting container body, and the electrolysis oxygen adjusting module is arranged in the second oxygen adjusting container body. Or the second oxygen adjusting container is arranged in the first oxygen adjusting container. By means of the arrangement, the concentration of oxygen in the oxygen adjusting container can be adjusted, and meanwhile the equipment structure is more compact.

The invention belongs to the technical field of titanium alloy additive manufacturing, and particularly relates to an electron beam additive manufacturing method for oxygen-enriched titanium alloy. According to the method, circulating titanium alloy coarse powder with the oxygen content being 0.25 wt.%-0.30 wt.% is adopted, the circulating titanium alloy coarse powder is dried and then subjected to printing forming, and a powder layer is obtained; according to the method, electron beam powder bed cladding is conducted on a powder layer under the environment that the vacuum degree is 10 <-3 > Pa to 10 <-5 > Pa, a BCC phase is reserved by means of a steady-state thermal field formed by electron beam powder bed cladding at a preheated substrate at the temperature of 700 DEG C to 800 DEG C, in the deformation process, transformation from BCC to HCP and transformation from HCP to FCC are induced by stress, and the high-toughness oxygen-enriched titanium alloy is obtained; the excellent performance matching of the tensile strength of 1220 MPa and the elongation percentage of 14.5% is realized, and meanwhile, the uniform elongation percentage of 8.1% is kept.

The utility model discloses a fresh-keeping device for a refrigerator and the refrigerator, and relates to the field of refrigerators. The refrigerator is provided with at least two mutually independent fresh-keeping chambers, the fresh-keeping device comprises an oxygen-enriched assembly, the oxygen-enriched assembly comprises an oxygen-enriched membrane, a collection cavity and an oxygen reduction bin, the collection cavity and the oxygen reduction bin are arranged on the two opposite sides of the oxygen-enriched membrane, the oxygen-enriched assembly is used for enabling more oxygen in the oxygen reduction bin to penetrate through the oxygen-enriched membrane and enter the collection cavity relative to nitrogen, and the oxygen reduction bin is provided with at least two ventilation openings; the at least two air vents are used for communicating the at least two fresh-keeping chambers; the air inlet end of the air extractor is communicated with the collecting cavity of the oxygen enrichment assembly; and the switch piece is used for controlling opening and closing of the at least one ventilation opening and adjusting the proportion of the circulation areas of the at least two ventilation openings. According to the fresh-keeping device, the single air extractor and the single oxygen enrichment assembly are used for efficiently reducing oxygen in the at least two fresh-keeping chambers, and the cost is low. And the oxygen reduction capacity of the fresh-keeping chamber can be adjusted, and the requirements for oxygen concentration of different types of food materials can be met.

The present invention provides an oxygen-dominated supra-nano dual-phase catalytic reaction material, which includes a uniform oxygen-enriched amorphous shell and a core encapsulated within the uniform oxygen-enriched amorphous shell. This invention exhibits ultrahigh HER performance, a critical reaction in water splitting, making it suitable for application in hydrogen production industries, battery companies, new energy vehicle enterprises, and large power stations.

The application discloses a preparation method and application of nitrogen-doped oxygen-rich hierarchical porous carbon, and adopts a one-step co-activation method to prepare the nitrogen-doped oxygen-rich hierarchical porous carbon, which is simple in process and low in energy consumption. The structure and surface chemical performance of the prepared nitrogen-doped oxygen-rich hierarchical porous carbon catalyst are easy to control. The prepared TNS-X material has a large specific surface area and a developed pore structure, which is beneficial to exposure of catalytic sites and diffusion of reactants. Through ammonia and water vapor co-activation, efficient doping of nitrogen atoms and oxygen atoms is realized, the number of catalytic sites is increased, and the catalytic activity is improved. The TNS-800 material exhibits high catalytic performance in a peroxymonosulfate (PMS) activation process, and can completely remove organic pollutants such as acetylaminophenol in a short time.

The invention relates to application of a molybdenum-based electrocatalyst cathode in electrocatalytic degradation of antibiotics in wastewater. According to the cathode, foamed nickel serves as a substrate, and carbon-doped oxygen vacancy-enriched molybdenum oxide C-MoO2-X is loaded on the surface of the substrate. The preparation method of the electrocatalyst is simple to operate, low in cost and environment-friendly, and the NF net structure with excellent performance can effectively avoid MoO2 agglomeration in the calcination process. According to the preparation method, pressure stress is generated by utilizing lattice shrinkage after carbon doping, adjacent O atoms are forced to be separated from lattices, stable oxygen vacancies are formed in MoO2 lattices through electron reconstruction, electron transfer is enhanced, strong Mo-C bonds are formed, Mo atoms are stabilized, oxidation dissolution of the Mo atoms is inhibited, the oxygen adsorption behavior is optimized, and an activation energy barrier from O2 to H2O2 to O2 is reduced. According to the invention, by designing a carbon-doped pyrolysis process, the selective generation of O2 of more than 90% is realized. The research provides a new design scheme for preparing an efficient and cheap non-noble metal ORR catalyst.

The invention discloses a bismuth oxyiodide modified oxygen-vacancy-enriched titanium dioxide nanotube array and a preparation method and application thereof, which realize wide-range and efficient light response efficiency: BiOI (forbidden bandwidth is approximately equal to 1.8 eV) is used as an excellent visible-light-driven photocatalyst and forms a semiconductor heterojunction with TNAs after being loaded, the spectral response range of the material is widened to a visible light wave band, and the visible-light-driven visible-light-driven photocatalyst can be used for preparing a visible-light-driven photocatalyst. And the construction of interface oxygen vacancies also improves the transmission efficiency of photon-generated carriers, so that the photocatalytic efficiency and the visible light utilization rate of the material are greatly improved. The material prepared by the invention can be used for a long time after being fixed in a reactor, and after the material is recycled for 20 times, the degradation rate of typical refractory organic matters in single 60 minutes can still be kept above 90%.

The present application relates to a kind of textile gas setting machine of configuration oxygen-rich control wet energy-saving system, the oxygen-rich control wet energy-saving system, including: oxygen-rich oxygen generator, with the one-to-one correspondence setting of gas burner on the textile gas setting machine, for generating oxygen-enriched air;Three-way bypass and bypass valve, with the one-to-one correspondence setting of gas burner, one end is communicated the oxygen-enriched air outlet of oxygen-rich oxygen generator, the other end is communicated the pipeline between corresponding gas burner and gas access solenoid valve on textile gas setting machine;High-temperature humidity sensor, with the one-to-one correspondence setting of each air draft section of the air draft branch pipe on the textile gas setting machine, for obtaining the exhaust gas discharge humidity parameter of setting machine section;Variable frequency control induced draft fan, replace the induced draft fan corresponding to the air draft branch pipe;Controller, with the variable frequency control induced draft fan, high-temperature humidity sensor connection;With the starting switch of connected gas burner, the oxygen-rich machine vacuum pump frequency converter circuit connection.

This invention discloses a preservation method for refrigerators, relating to the field of refrigerators. The refrigerator has at least two independent preservation compartments. The preservation device includes: an oxygen-enriching component, comprising an oxygen-enriching membrane, a collection chamber, and an oxygen-reducing chamber, with the collection chamber and oxygen-reducing chamber located on opposite sides of the oxygen-enriching membrane; at least two vents in the oxygen-reducing chamber for connecting the at least two preservation compartments; an air extraction device; an oxygen-reducing adjustment component, used to adjust the airflow of at least one vent after the air extraction device is activated, thereby adjusting the level of the preservation compartment; and a controller to control each adjustable preservation compartment to alternately enter an oxygen-reducing mode and a stable mode. The preservation device of this invention has an adjustable oxygen-reducing capacity for the preservation compartments, adapting to the oxygen concentration requirements of different types of food. This preservation method is simple and has low energy consumption.

The application discloses a magnetic LDH biochar as well as a preparation method and application thereof, and belongs to the technical field of pollution prevention and control. The preparation method of the magnetic LDH biochar comprises the following steps: sequentially performing puffing treatment and pyrolysis carbonization treatment on iron-containing biomass to obtain magnetic biochar; mixing a magnesium salt solution and the magnetic biochar, and then performing hydrothermal reaction to obtain magnetic loaded iron-magnesium hydrotalcite biochar; mixing the magnetic loaded iron-magnesium hydrotalcite biochar and a nitrogen source, and then heating and doping to obtain the magnetic LDH biochar. The magnetic LDH biochar prepared by the application can adsorb dissolved oxygen around the carbon material, improve the mass transfer efficiency and dissolved oxygen utilization rate of microbial degradation of pollutants in the artificial wetland, rapidly enrich oxygen, increase the dissolved oxygen concentration of the water body, has the advantages of low energy consumption, difficulty in blocking, high nitrogen and phosphorus removal efficiency and the like, and when the magnetic LDH biochar is applied to the intermittent aeration artificial wetland, the nitrogen and phosphorus treatment performance of the artificial wetland can be effectively strengthened.

The invention belongs to the technical field of zinc smelting, and discloses a method for producing a high-zinc high-iron acid solution through zinc hydrometallurgy and removing iron in an oxygen pressure kettle at medium temperature. According to the oxygen-enriched pressurized direct leaching process based on zinc hydrometallurgy, in order to improve various economic and technical indexes, a high-zinc and high-iron acid solution is produced after process technology optimization is carried out. Then, the first-stage high-zinc high-iron acid solution is treated, an oxygen pressure kettle medium-temperature iron removal method is adopted, the iron content of the obtained iron-removed solution is 0.5-1.5 g / L, the iron-removed solution is fed to neutralization iron removal operation, the dosage of a neutralizer and the dosage of an oxidizing agent are reduced, and a qualified iron-removed supernatant solution is obtained; and hematite with iron content of more than or equal to 55% in the slag sample is obtained, and byproducts have value of sale. According to the method, efficient separation of zinc and iron is achieved, the slag rate of the system is reduced, and safe, continuous and stable operation of the full-wet-process pressure leaching zinc smelting system is guaranteed.

The invention is applicable to the technical field of treatment of organic pollutants in water, and provides a catalytic material for degrading perfluoro-polyfluorinated compounds as well as a preparation method and application of the catalytic material. Through defect engineering and crystal face regulation and control, the CoFe2O4 / BiOCl (010)-Ovs heterojunction material rich in oxygen vacancies is constructed. According to the material, the conductivity is remarkably enhanced, the light response range is widened, reaction active sites are enriched, separation and migration of photon-generated carriers are promoted, the electron-hole utilization efficiency is improved, and then the photoelectrocatalysis performance is improved. The material accelerates the redox cycle of Co < 2 + > / Co < 3 + > and Fe < 2 + > / Fe < 3 + >, significantly improves the activation efficiency of PMS and the generation of active oxygen species, and has the multifunctional characteristics of photoelectrocatalysis and PMS activation. The PMS / PMS composite material is prepared into a photo-anode, the photo-anode is applied to a photoelectrocatalysis-PMS coupling system, under low voltage, PMS is activated through photon-generated carriers to generate ROS, a multi-ROS synergistic oxidation path is formed, and efficient degradation and defluorination mineralization of PFASs are achieved. The system has excellent stability and environmental adaptability, and has a wide application prospect.

The invention relates to the technical field of agricultural cultivation, in particular to a root oxygen regulation-oriented Chinese rose cultivation system and method, and aims to solve the problems that existing cultivation is limited by fixed planting density, so that plant space competition is limited, oxygen-enriched liquid is difficult to uniformly diffuse in a deep root system area due to shallow spraying, and hypoxia decline of a root system is caused. The system comprises a cultivation frame, a moving module, a cultivation module and a regulation and control module. The moving wheel set is connected with the driving module so as to drive the moving chain set arranged on the cultivation frame, and the cultivation plates bearing Chinese roses are arranged on the chain set. A regulation and control module containing the root oxygen unit and the regulation and control unit is arranged beside the cultivation frame and used for intensively regulating and controlling the oxygen content of the root system when the cultivation disc moves; the automatic circulation of dynamic and static decoupling is realized, and the plant circulation is promoted to eliminate the disadvantage of space competition; meanwhile, the leakage risk of a complex pipe network is avoided, fixed-point intervention is carried out through side centralized equipment, matrix hardening is accurately broken, deep waste gas replacement and uniform diffusion of enriched oxygen are achieved, and the root system is effectively rejuvenated and weakened.

The invention belongs to the technical field of indoor environment construction in high-altitude areas, and particularly relates to an indoor oxygen-enriched humidifying air cooperative regulation and control system and method for a building in a high-altitude area. The system comprises a shell, wherein an air inlet and an air outlet are formed in the shell; an oxygen enrichment module used for air oxygenation and a humidification module used for air humidification are arranged in the shell. Along the air flow from the air inlet to the air outlet, the oxygen enrichment module comprises an induced draft fan, a primary filter screen and an oxygen generator which are arranged in sequence; an oxygen-enriched air bypass pipe is arranged on one side of the oxygen generator and used for feeding oxygen prepared by the oxygen generator into the humidifying module; an electromagnetic valve is arranged on the oxygen-enriched air bypass pipe; the humidifying module comprises a preheating coil, a humidifying chamber, a surface air cooler, a reheating coil, a pressure stabilizing chamber, a secondary filter screen and an air supply fan which are sequentially arranged. The problems of equipment system redundancy, low control precision, mutual interference of oxygen-enriched gas flow humidification air and local dew formation and water accumulation caused by humidification due to regulation and control of a humidity subsystem and an oxygen subsystem in the prior art are solved.

1. Name of the product in this design: Cleaner (Oxygen-enriched Fresh Air). 2. Purpose of this design: To purify indoor air and release negative ions in an oxygen-rich environment. 3. The key design feature of this product is its shape. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The application discloses a plateau intelligent nursing bed with an oxygen enrichment function, and belongs to the technical field of nursing bed mattresses, which comprises a bed frame, a bed board arranged on the bed frame, a head oxygen enrichment mechanism arranged in a head region of the bed board and surrounding the bed board to form a closed partial oxygen enrichment space for accommodating a patient's head, an oxygen concentration sensor arranged in the head oxygen enrichment mechanism, and a controller electrically connected with the oxygen concentration sensor and used for maintaining the oxygen concentration in the oxygen enrichment space in a preset suitable range. The closed partial oxygen enrichment space is provided through the head oxygen enrichment mechanism, the oxygen concentration sensor and the controller are combined, real-time monitoring and automatic adjustment of the oxygen concentration in the oxygen enrichment space are realized, the head region of the patient is ensured to be always in a suitable oxygen concentration range, discomfort caused by plateau hypoxia is effectively relieved, and oxygen inhalation comfort and efficiency are improved.

1. The name of the design product: micro-pressure oxygen-enriched cabin. 2. The use of the design product: the design product is used for oxygen inhalation and oxygen therapy in a family environment and similar family environment, and has the functions of assisting breathing and improving blood oxygen concentration. 3. The design points of the design product: the shape of the product. 4. The picture or photo that best indicates the design points: perspective view.

1. The name of the design product: micro-pressure oxygen-enriched cabin. 2. The use of the design product: the design product is used for oxygen inhalation and oxygen therapy in a family environment and similar environments, and has the functions of assisting breathing and improving blood oxygen concentration. 3. The design points of the design product: the shape of the product. 4. The picture or photo that best indicates the design points: perspective view. 5. The design claimed contains color.

The invention provides an oxygen-enriched anion water mist generating device which comprises a liquid storage device used for storing liquid; the anion water mist generator is used for atomizing liquid; the mixer comprises a shell, the shell defines an inner cavity, the inner cavity comprises a liquid supply cavity and a mixing cavity which are isolated, the negative ion water mist generator is installed in the mixing cavity, liquid in the liquid supply cavity enters the negative ion water mist generator to be atomized to generate negative ion water mist, and the negative ion water mist is used for generating negative ion water mist. Oxygen leaving the anion water mist generator is mixed with oxygen in the mixing cavity to generate oxygen-enriched anion water mist. On the premise of miniaturization and integration, the device has the advantages of being small in size, high in safety, stable in oxygen-enriched anion water mist concentration and the like.

The utility model provides a stabilizing treatment system for a household garbage landfill, which comprises a PLC (Programmable Logic Controller) control device which is respectively connected with a gas extraction well, a water replenishing well and a gas injection well through a gas extraction pipeline, a water replenishing pipeline and a gas injection pipeline; a monitoring and control device and a pollutant treatment device are arranged in each of the air exhaust pipeline and the air injection pipeline; and a monitoring and control device and a pollutant treatment device are also arranged in the water replenishing pipeline. According to the system, through arrangement of various devices, a good oxygen-enriched environment is formed in the domestic garbage body, rapid decomposition of organic matter in a domestic garbage heap body can be accelerated, the purpose of rapidly degrading the organic matter in the domestic garbage heap body is achieved, the domestic garbage in the heap body is stabilized, and garbage excavation and site comprehensive utilization in the later period are facilitated.

This invention relates to a modified zero-valent iron / biochar composite material with oxygen-rich vacancies and its application. The modified zero-valent iron / biochar composite material comprises a biochar carrier and zero-valent iron loaded on the biochar carrier. The surface of the zero-valent iron is coated with sulfur-containing iron compounds and / or boron-containing iron compounds, and the surface of the zero-valent iron contains abundant oxygen vacancies. The modified zero-valent iron / biochar composite material is specifically prepared by the following method: dispersing the biochar carrier and zero-valent iron in oxygen-free water and grinding; adding a sulfur source or boron source to the ground suspension, stirring and grinding thoroughly, and drying; subsequently soaking in a reducing solution, followed by high-temperature calcination and cooling to obtain the modified zero-valent iron / biochar composite material. Compared with the prior art, the modified zero-valent iron / biochar composite material prepared by this invention can be used synergistically with compound oxidants to achieve effective remediation of organically contaminated soil.

The present invention relates to a method by which intravenous fluids, blood or artificial blood containing high levels of mechanically infused dissolved oxygen can be used to maintain appropriate oxygen levels in venous blood to provide short term oxygenation support to a compromised patient or trauma patient. In one aspect, a system and method for oxygenating a biological fluid for a compromised subject or trauma subject in need of oxygenation support to maintain the subject at an appropriate oxygen level is provided, the method comprising: supplying oxygen from an oxygen source; and dissolving an amount of the supplied oxygen into the biological fluid to obtain an oxygen enriched biological fluid.

The present invention relates to the technical field of cement production and in particular to a calcination system and a calcination process for low-carbon cement clinker. The calcination system comprises: a kaolin calcination assembly comprising a preheater and a decomposition furnace; wherein the preheater is provided with a multi-stage cyclone; wherein the preheater is provided with an inlet and an outlet; wherein the decomposition furnace is provided with a fuel inlet and a raw material inlet; wherein the raw material inlet is connected to the outlet; wherein the decomposition furnace calcines to produce activated kaolin; wherein the calcination temperature in the decomposition furnace is between 700°C and 850°C, the calcination time is between 0 and 1.5 hours, and the calcination atmosphere in the decomposition furnace is an oxygen-rich atmosphere or a CO reduction atmosphere.and a cement calcining unit configured for calcination to produce cement clinker; wherein the activated kaolin is added to the outlet side of the cement calcining unit in a predetermined proportion of the activated kaolin in the cement clinker. It can reduce the use of carbon-containing feedstocks in clinker production, decrease the carbon emissions of the clinker, and adjust the hydration rate of the cement clinker.

The application relates to an ultrasonic treatment method of high-impurity copper anode slime. The ultrasonic treatment method is realized through hierarchical ultrasonic strengthening and synergistic leaching. In the first-stage leaching, hydrogen peroxide-oxygen-rich air composite oxidants are combined with ultrasonic cavitation effects to realize efficient oxidation leaching of arsenic, antimony and bismuth; in the second-stage leaching, sulfuric acid-sodium sulfite mixed leaching agents are used to remove harmful impurities such as arsenic, antimony and bismuth under ultrasonic strengthening, and to efficiently enrich valuable metals such as gold, silver, selenium and tellurium, so that the treatment period is shortened, energy consumption and reagent consumption are reduced, resource comprehensive utilization is improved, and the method is suitable for efficient separation and resource recovery of high-impurity copper anode slime containing refractory impurities such as arsenic, antimony and bismuth and valuable metals such as gold, silver, selenium and tellurium.

The application discloses a low copper loss double-side blown bath smelting method and belongs to the technical field of copper pyrogenic smelting. The method constructs a vertical oxygen potential gradient in the same smelting furnace: 70%-85% of oxygen-rich air is blown into the tuyere at the lower part of the furnace body to form a strong oxidation smelting zone; and a reducing medium such as natural gas or pulverized coal is sprayed into the slag layer at the upper part of the furnace body to form a weak reduction clarification zone. The amount of the reducing medium sprayed is dynamically adjusted by on-line monitoring of the CO content in the flue gas or the Fe3O4 content in the slag, and the Fe3O4 content in the slag is controlled to be 3%-6%. The method efficiently reduces Fe3O4 in the slag into FeO, significantly reduces the viscosity of the molten slag, and improves the slag-ice-copper separation condition, so that the copper content in the discarded slag is stably reduced from more than 1.8% in the conventional method to less than 1.3%, and the metal recovery rate is improved. Meanwhile, the method realizes integration of smelting and tempering, simplifies the process, reduces energy consumption, and enhances the adaptability to complex raw materials.

The application discloses an energy-saving nitrogen production equipment and method with pressure swing adsorption function, and relates to the technical field of nitrogen production. The application comprises a nitrogen production tank, further comprises a partition disc and a top sealing disc fixedly installed in the nitrogen production tank, and a partition plate fixedly installed between the partition disc and the top sealing disc for partitioning the nitrogen production tank into a first nitrogen production area and a second nitrogen production area; the first nitrogen production area and the second nitrogen production area are both provided with a nitrogen production assembly; a pressure swing adsorption unit comprises a gas guiding assembly and a pressure increasing assembly; and an equalizing desorption unit comprises a gas storage assembly and a stamping assembly. The application has the advantages that the alternate operation of the first nitrogen production area and the second nitrogen production area can effectively improve the production capacity, the gas flow direction can be flexibly controlled during the nitrogen production, the oxygen and nitrogen separation effect is enhanced by self-pressurization, the gas production efficiency is improved, the residual pressure energy can be recycled and utilized to realize the equalization of the pressure of the first nitrogen production area and the second nitrogen production area, the discharge of the oxygen-rich tail gas is accelerated in the pressure relief stage, the operation energy consumption is effectively reduced, and the energy-saving effect is remarkable.

The invention belongs to the technical field of photocatalysis and photoelectrochemistry, and discloses a preparation method of an oxygen-vacancy-enriched BiVO4 photo-anode co-modified by hydroxyl ferronickel oxide and carbon quantum dots and application of the oxygen-vacancy-enriched BiVO4 photo-anode in a urea photoelectrolysis reaction. According to the method, a BiVO4 photo-anode is prepared firstly, then NiFeOOH and CQDs modification is carried out in sequence, and a Bi2S3 thin film is converted into the BiVO4 photo-anode through a two-step annealing method. Experiments show that compared with an unmodified BiVO4 photo-anode, the modified photo-anode can effectively reduce the recombination rate of photon-generated carriers and improve the charge separation efficiency and the surface catalytic activity. Experimental data show that the photocurrent density Jph of the BiVO4 / NiFeOOH / CQDs photoanode under 1.23 VRHE reaches 5.4 mAcm <-2 >, which is nearly 11 times higher than that of a pure BiVO4 photoanode, and the charge separation efficiency is improved from 42% to 73.49%. The preparation method is simple in process and low in cost, and the prepared photo-anode is excellent in performance in a photoelectrolysis urea reaction and integrally shows good application potential.

A ventilation device comprising a pressurized gas source connectable to a patient interface and an oxygen inlet valve for enriching respiratory gas with oxygen, characterized in that the inlet valve can be coupled to the housing of the ventilator via at least one coupling element (15, 18, 19) which interacts with a connection element of the ventilator, wherein an oxygen-conducting connection to the ventilator is established via the coupling of the oxygen outlet (15) of the inlet valve with an oxygen inlet (29) of the ventilator, wherein oxygen is introduced from the oxygen inlet (29) via a connecting tube through the device housing into the air passage in the area of ​​the blower box (27) which surrounds the blower of the ventilator.