61 results about "Hydrogen dioxide" patented technology

The invention provides a CoCe-SNC catalyst and a preparation method and application thereof, and belongs to the technical field of hydrogen fuel cell / metal air cell cathode catalysts. The preparation method comprises the following steps: mixing and grinding a metal organic framework ZIF-8 and KSCN, carrying out first pyrolysis, compounding the obtained nitrogen and sulfur-containing co-doped carbon with two metal complexes Co-PM and Ce-PM, and carrying out second pyrolysis to obtain the CoCe-SNC diatomic catalyst. According to the invention, the two-dimensional lamellar structure carbon material and the asymmetric coordination diatomic metal are compounded, so that the catalytic performance of the whole catalyst is improved, and meanwhile, the yield of hydrogen peroxide generated by side reaction is reduced. The catalyst is applied to a hydrogen fuel cell / metal air cell, and the defects that in the prior art, a noble metal catalyst is high in cost, and a non-noble metal catalyst is low in catalytic activity, high in hydrogen peroxide yield, poor in catalyst stability and the like are overcome.

The invention discloses a preparation method of tert-butyl peroxyneodecanoate, which is characterized in that zinc oxide is uniformly dispersed on a graphene oxide / attapulgite composite carrier interface in a nano-particle form through a hydrothermal method to form a supported catalyst with a high specific surface area, active sites are fully exposed, the catalytic efficiency is obviously improved, and the catalytic activity is improved. Zinc oxide and a carrier form strong interaction, in the reaction process, an adaptive alkaline system is optimized, the composite catalyst shows high selectivity in a sodium hydroxide / tert-butyl hydroperoxide system, the residual quantity of byproducts is smaller than or equal to 0.01%, reaction conditions are mild, high-temperature and high-pressure equipment is not needed, the catalyst can be recycled, and the content of metal ions in waste liquid is smaller than or equal to 0.1 ppm; the purity of the obtained product tert-butyl peroxyneodecanoate is more than or equal to 99.5%, the active oxygen content reaches 7.2-7.5%, the decomposition temperature is more than or equal to 120 DEG C, the 10h half-life period temperature is 75-80 DEG C, the initiation efficiency is more than or equal to 95% when the tert-butyl peroxyneodecanoate is used as an initiator, the light transmittance is more than or equal to 92%, the molecular weight distribution index is less than or equal to 2.5, no implosion phenomenon exists in the polymerization process, and the advantages of high efficiency, low consumption

The present invention comprises: a stack (1) obtained by stacking a plurality of cells (11) that generate hydrogen and power by switching between an electrolysis mode in which hydrogen and oxygen are generated by water electrolysis and a fuel cell mode in which hydrogen is oxidized to generate power; and a gas transfer controller (7) that performs fuel cell mode gas transfer control for transferring a hydrogen-containing gas (22) and an oxygen-containing gas (32) from the high-temperature side toward the low-temperature side of the stack in the fuel cell mode and / or electrolysis mode gas transfer control for transferring water vapor (52) and an oxygen electrode gas (62) from the low-temperature side toward the high-temperature side of the stack or from the high-temperature side toward the low-temperature side in accordance with the operation of the stack in the electrolysis mode.

The invention discloses an indium manganese sulfide-covalent organic framework MIS / BT50 composite photocatalyst as well as a preparation method and application thereof, and belongs to the technical field of photocatalysis. According to the preparation method, a solvothermal method synthesis strategy is adopted, indium manganese sulfide is introduced into a covalent organic framework, and the indium manganese sulfide-covalent organic framework MIS / BT50 composite photocatalyst is constructed; the composite photocatalyst has excellent visible light response capability, hydrogen peroxide can be efficiently prepared under visible light, and the yield of hydrogen peroxide in a pure water system reaches up to 3519 [mu] mol.g <-1 >. H <-1 >; meanwhile, under the condition that no extra iron source is added, the composite photocatalyst can rapidly inactivate escherichia coli in a water body, and the limitation that a traditional Fenton reaction depends on the iron source is broken through; the invention discloses a preparation method of the composite photocatalyst, and a solvothermal method is simple and controllable in preparation process, mild in reaction condition, high in raw material utilization rate and suitable for large-scale production.

The invention belongs to the technical field of semiconductors, particularly relates to an efficient and uniform TiN film layer cleaning process and device, discloses a cleaning process and device named'efficient and uniform TiN film layer cleaning process and device ', and aims at solving the problems that an existing TiN film layer is not uniform in cleaning, a base material is corroded, the environment is polluted and the operation safety is poor. The method is characterized in that chemical cleaning liquid containing ammonium fluoroborate, hydrogen peroxide and the like is adopted, ultrasonic activation, multi-stage soaking, rinsing and high-pressure washing are assisted, and accurate cleaning is achieved through an automatic mechanical arm and a central control system. The method can realize thorough, uniform and lossless cleaning of sediments, remarkably improves efficiency, reduces cost, prolongs the service life of equipment, and ensures operation safety and environment friendliness.

The invention relates to the field of oxidative desulfurization of oil and sulfur-containing liquid hydrocarbon fuels (including diesel fuel) and can be used to reduce harmful emissions and exhausts (in the form of sulphur oxide and carbon monoxide - SO2 and CO) of oil refineries, as well as various industrial enterprises (including energy), facilities and engines using hydrocarbon fuels. Method of oxidative desulfurization of oil and liquid hydrocarbon fuel and reducing harmful emissions of sulfur oxides and carbon provides a process of oxidation in tanks or pipelines by ozone (O3) or ozone-containing gases, in which sulfur oxides (SO2 and SO), without releasing them into the atmosphere, mix in a closed vessel or pipeline with carbon monoxide (CO) and by means of chemical reactions of sulfur monoxide decomposition (2SO↑ → SO2↑+S↓) and sulfur recovery (SO2↑ + 2CO↑ → S↓ + 2CO2↑) elemental sulfur (S) is extracted from oil or liquid hydrocarbon fuel and carbon monoxide (CO) is converted into its dioxide (CO2). The oxidation, also decomposition and recovery reactions are carried out one-step or sequentially, in the presence of oxidation-recovery group catalysts corresponding to these reactions, such as tert-Butyl hydroperoxide (C₄H₁₀O₂). Ozonized atmospheric air is used as ozone-containing gas.

Embodiments described herein generally relate to processes for making carbon quantum dots (CQDs). A method includes adding a coal product, a H2O2 solution, and water to a reactor. The coal product, the H2O2 solution, and the water form a mixture. The reactor is heated to a temperature of about 60°C to about 100°C to catalyze the carbon quantum dot (CQD) production mechanism within the mixture to form a CQD. The CQD is collected. The CQD includes carbon spheres with a diameter of about 15 nm or less. A controller may be programmed to perform the method.

The invention relates to a preparation method of a solar cell and the solar cell. The preparation method of the solar cell comprises the following steps: carrying out chemical cleaning on a silicon substrate, and removing an oxide layer on the surface of the silicon substrate; the chemical cleaning of the silicon substrate comprises the following steps in sequence: carrying out first soaking on the silicon substrate by using an ammonium fluoride solution; performing second soaking on the silicon substrate by using a mixed solution of hydrogen chloride and hydrogen peroxide; performing third soaking on the silicon substrate by using a hydrogen fluoride solution; depositing an amorphous silicon passivation layer on the surface of the silicon substrate after chemical cleaning, wherein the thickness of the amorphous silicon passivation layer is 6-8 nm; and performing hydrogen plasma treatment on the amorphous silicon passivation layer. According to the preparation method of the solar cell, a good passivation effect on the silicon substrate can be achieved, so that the interface defect state density is reduced, and the open-circuit voltage of the solar cell is improved.

1. The name of the design product: hydrogen peroxide low-temperature plasma sterilizer (PS-80X). 2. The use of the design product: for sterilization of medical wire cables, optical lenses and glass lenses, power equipment and batteries, rigid endoscopes, catheters and surgical instruments. 3. The design points of the design product: in the combination of shape, pattern and color. 4. The picture or photo that best shows the design points: perspective view. 5. The design claimed contains color.

An apparatus for producing an organic hydride includes: a cathode electrode that generates an organic hydride and hydroxide ions from a substance to be hydrogenated and water; an anode electrode that generates oxygen by oxidizing the hydroxide ions; and an electrolyte membrane that is composed of an anion exchange membrane and is arranged between the cathode electrode and the anode electrode so as to transfer the hydroxide ions from the cathode electrode side to the anode electrode side.

A humidifier device for generating a purge gas for a lithographic apparatus, the device comprising: a first gas inlet configured to receive a first flow of a first gas; a second gas inlet configured to receive a second flow of the first gas; an enricher configured to generate an enriched gas flow comprising the second flow of the first gas and water or hydrogen peroxide; and a mixer configured to mix the first flow of the first gas with an enriched gas derived from the enriched gas flow to generate the purge gas.

The application discloses a PHI / zinc oxide heterojunction photocatalyst and a low-temperature synthesis method and application thereof. The structure of the photocatalyst is that PHI nanosheets grow well on the surface of ZnO and are tightly wrapped with ZnO, forming a sheet-shaped core layer structure, the thickness of the PHI nanosheet is 3-5 nm, and the ZnO is a wurtzite crystal structure. The low-temperature synthesis method comprises the following steps: mixing and heating a PHI precursor and a molten salt to obtain PHI, placing the PHI and a zinc oxide precursor in an aqueous solution, adding an alkali to adjust the pH, and then reacting to obtain the photocatalyst PHI / ZnO. The photocatalyst can be used for activating molecular oxygen to oxidize the C-H bond at the benzyl position of CM to prepare cumene hydroperoxide, and can also be used for a cascade oxidation reaction to form imine and sulfoxide series compounds. The application shows the advantages of the high-activity carbon nitride-based photocatalyst in the field of organic conversion, and provides an important platform for realizing the essence safety, green and efficient oxidation reaction by the peroxide strategy.

The invention relates to the technical field of semiconductor material processing, in particular to a method for polishing a gallium oxide crystal, which comprises the following steps: a) a surface pretreatment step: treating the surface of the gallium oxide crystal by adopting CF / Oplasma to form a GaF and Ga (OH) mixed modified layer; b) a main polishing step: carrying out main polishing on the pretreated gallium oxide crystal by using a polishing solution containing a hydrogen peroxide system activated by bicarbonate in a low-temperature environment in combination with ultrasonic assistance; c) a precision polishing step: in a lower temperature environment, using a polishing solution with lower pressure and an improved formula to carry out precision polishing on the gallium oxide crystal; and d) a cleaning and post-processing step: a multi-stage cleaning process is adopted to remove polishing residues and repair surface defects, the material removal rate is increased by about 2.3 times (reaching 1.2 [mu] m / h), and the surface roughness Ra is reduced by about 2 times (reaching 0.09 nm).

The present invention relates to the technical field of cumene oxidation, and specifically to a cumene oxidation reaction system and method, comprising an oxidation tower and a gas-liquid separator; the oxidation tower is sequentially provided with a bubbling reactor and a microbubble generator from top to bottom; the bottom of the oxidation tower is connected to a gas supply device and a liquid supply device, respectively, and the top is connected to the gas-liquid separator; the top of the gas-liquid separator is connected to a condensing device and the gas supply device, respectively, and the condensing device is connected to an oxygen analysis device; a liquid circulation device is provided between the bottom of the gas-liquid separator and the bottom of the oxidation tower, for circulating the liquid inside the gas-liquid separator to the inside of the microbubble generator. Utilizing this system, the efficiency of cumene oxidation to produce cumene hydroperoxide can be effectively improved, and the system has the advantages of high cumene hydroperoxide production rate, high selectivity, and high safety.

The application relates to a titanium etching solution, a preparation method thereof and application of the titanium etching solution to surface treatment of a semiconductor ceramic plate. The titanium etching solution comprises raw materials with the following weight components: 1.8-3.0% of inorganic alkali; 4.0-10.0% of hydrogen peroxide; 0.5-1.0% of a stabilizer; 0.05-0.3% of a copper surface protective agent; 0.2-0.6% of an accelerator; and the balance of deionized water. The preparation method of the titanium etching solution specifically comprises the following steps: providing the raw materials of the above components, adding the deionized water, the inorganic alkali, the hydrogen peroxide, the stabilizer, the copper surface protective agent and the accelerator into an etching tank in sequence and stirring for 5-10 min. When the titanium etching solution is applied to surface treatment of the semiconductor ceramic plate, the temperature of etching treatment is constant titanium removal at 50-60 DEG C, and the time of etching treatment is 30-100 s. The application provides the titanium etching solution with good etching uniformity, high etching rate and high etching factor.

The application discloses a kind of water removing agent and its preparation method and application.The water removing agent of the present application is a composite water removing agent composed of inorganic matrix calcium oxide, silicon oxide and activated carbon;Among them, the content of calcium oxide is 21-53wt%, the content of silicon oxide is 18-50wt%, and the content of activated carbon is 29-61wt%.The water removing agent of the present application can remove trace water in cumene hydroperoxide.The water removing agent has the advantages of good water removal effect, low cost and stable performance.

A control device (100) and method for operating a hydrogen direct injection compression ignition combustion engine (3). The method comprises injecting (S101) a pilot agent into the combustion chamber (35), thereby promoting auto-ignition of hydrogen gas fuel, wherein the pilot agent consists of a solution comprising hydrogen peroxide. The present disclosure also relates to a combustion engine system (10) comprising a direct injection compression ignition combustion engine (3) operable with hydrogen and the control device (100). The combustion engine system (10) can be comprised in a vehicle (1).

The invention relates to a method for preparing a hierarchical porous catalyst layer of a high-drainage porous membrane electrode based on micro-nano bubbles, which comprises the following steps of: generating oxygen bubbles under the catalysis of carbon-loaded platinum by taking hydrogen peroxide as a bubble source, and constructing the high-drainage porous membrane electrode by taking the micro-nano bubbles as a template; the specific method comprises the following steps: dissolving a carbon-supported platinum catalyst PtC and a Nafion solution in ethanol and water to obtain a solution, carrying out ultrasonic treatment on the solution, dropwise coating the solution on carbon paper at 80 DEG C, and dropwise adding a hydrogen peroxide solution in the coating process; and drying in a vacuum freeze drying box after air drying. According to the invention, the membrane electrode with high porosity is constructed, so that liquid water is effectively prevented from blocking pores, and the phenomenon of water logging in the battery is relieved. According to the preparation method, shrinkage and agglomeration of catalyst particles are avoided, and the hierarchical porous catalyst layer of the porous membrane electrode with high drainage performance is obtained. The invention also provides application of the porous membrane electrode in the field of fuel cells.

The present disclosure relates to a fuel cell including a durability-enhancing layer and a method for manufacturing the same. The fuel cell includes: an electrolyte membrane-electrode assembly; a durability-enhancing layer formed on at least one side of the electrolyte membrane-electrode assembly; and a gas diffusion layer formed on a side of the durability-enhancing layer opposite the side on which the electrolyte membrane-electrode assembly is formed. The durability-enhancing layer includes a hydrogen peroxide decomposition catalyst and a hydrogen ion conductive polymer and is formed on at least a portion of at least one side of the electrolyte membrane-electrode assembly.

The application provides a preparation method and application of hollow cerium dioxide nanoparticles, and the preparation method comprises the following steps: (1) preparing nanosilica particles by a solvothermal method to obtain a powder; (2) generating a cerium dioxide shell layer on the surface of the nanosilica particle template by the solvothermal method to obtain a powder; (3) calcining the obtained powder; and (4) etching the core-shell structure nanoparticles by alkali to obtain the hollow cerium dioxide nanoparticles. The nanoscale hollow cerium dioxide nanoparticles are synthesized through a simple reaction, the size and morphology are uniform, the synthesis steps are simple, and the hollow cerium dioxide nanoparticles are suitable for batch production. Through experiments, the hollow cerium dioxide nanoparticles have peroxidase and superoxide dismutase enzyme-like activities, so that the hollow cerium dioxide nanoparticles have good scavenging capacity for active oxygen and are suitable for application in biomedical research.

The application belongs to the technical field of electrocatalytic materials, and discloses a Fe3C / Fe SA -N-C catalyst and a preparation method and application thereof; the Fe3C / Fe SA -N-C catalyst comprises a nitrogen-doped carbon carrier, and iron monatomic atoms and Fe3C nanoparticles loaded on the nitrogen-doped carbon carrier; the iron monatomic atoms are atomically dispersed on the nitrogen-doped carbon carrier; and the Fe3C nanoparticles are coated by a carbon layer in the nitrogen-doped carbon carrier. The catalyst has high electrocatalytic activity, optimal reaction kinetics performance, good stability, and low hydrogen peroxide production rate. When the catalyst is used for an air electrode of a zinc-air battery, the peak power density of the zinc-air battery is as high as 167 mW·cm ‑2 , and the zinc-air battery has excellent charge-discharge cycle stability of up to 1200 h.

The present application relates to a kind of preparation method of red fluorescent carbon dots and application in detecting hypochlorite;Firstly, N,N'-(1,4-phenylene) bis(N-(4-aminophenyl) phenyl-1,4-diamine), tert-butyl hydroperoxide and hydrochloric acid are dispersed in ethanol, then the mixture is carbonized by solvothermal method, after separation and purification, the carbon dots of red fluorescent emission are obtained;The prepared red fluorescent carbon dots can be applied to the rapid detection of residual hypochlorite ions in utensils.Compared with prior art, the red fluorescent carbon dots in the present application have long emission wavelength, and the preparation method is simple, fast response (~10 seconds), high selectivity, wide applicable pH range (5-9), good reproducibility and other advantages, and has broad application prospect in rapid detection of residual hypochlorite in utensils.

A rocket engine configured to run on a liquid fuel and liquid hydrogen peroxide is started by impinging high pressure streams of a fuel and liquid H2O2 into a combustion chamber under pressure and temperature conditions sufficient to decompose the liquid H2O2 into hot water stream and oxidizer and achieve ignition.

The invention provides a preparation method of a porous carbon / nano-manganese dioxide composite material and application of the porous carbon / nano-manganese dioxide composite material as a positive electrode material of a zinc ion battery, and relates to the technical field of electrochemical energy storage. The method comprises the following steps: dissolving manganese nitrate tetrahydrate and sorbitol in deionized water to form a mixed solution, drying, adding ammonium chloride into the obtained blocky mixture, and grinding into powder; the powder is heated to 600-800 DEG C in an argon atmosphere, heat preservation is conducted for 1 h, then the temperature is reduced to 200-350 DEG C, heat preservation is conducted for 1 h, and air is continuously introduced in the heat preservation process after cooling; and placing the product in a hydrogen peroxide solution, adjusting the pH value to 13, stirring for reaction, filtering, washing and drying to obtain the porous carbon / nano manganese dioxide composite material. The method can solve the problems of low manganese dioxide conductivity, slow diffusion kinetics, manganese dioxide dissolution and the like in the prior art. The obtained porous carbon / nano manganese dioxide shows good electrochemical performance as a zinc ion battery positive electrode material, and has a good application prospect.

The invention provides a recombinant algal strain for expressing glycollate oxidase, catalase, glyoxylate polyaldolase and hydroxymalonate semialdehyde reductase as well as a construction method and application of the recombinant algal strain, and belongs to the technical field of genetic engineering. The invention provides a recombinant microalgae strain, which is a microalgae strain for expressing glycollic acid oxidase, catalase, glyoxylic acid polyaldolase and hydroxymalonic semialdehyde reductase in chloroplast. The recombinant microalgae strain can decompose a light respiration by-product glycollic acid into carbon dioxide, the carbon dioxide concentration of chloroplast is improved, the carbon sequestration efficiency of microalgae is effectively improved, and fixed CO2 can be converted into biomass, pyruvic acid, starch, grease and other metabolites and bioactive substances. The recombinant microalgae strain disclosed by the invention has a wide application prospect in the aspects of biological carbon sequestration, synthesis of microalgae metabolites and preparation of microalgae bioactive substances.

The utility model relates to the technical field of chemical industry production, and discloses a device for filtering impurities in tert-butyl hydroperoxide production, which comprises a siphon barrel body and a filter plate, the top of the siphon barrel body is in threaded connection with a cover plate, the inside of the cover plate is fixedly connected with a hand hole, and the right side of the inside of the cover plate is fixedly connected with a water injection port. A tank outlet is fixedly connected to the interior of the left side of the siphon barrel body, a tank inlet is fixedly connected to the interior of the right side of the siphon barrel body, a tuning fork is fixedly connected to the exterior of the siphon barrel body, a discharge port is fixedly connected to the front side of the siphon barrel body, and fixing blocks are fixedly connected to the front side and the rear side of the interior of the siphon barrel body. According to the utility model, the mounting and dismounting of the filter screen are realized, so that the tedious bolt screwing process is avoided, the manpower is effectively saved, the labor intensity is reduced, the dismounting of the filter screen becomes easy and convenient, the filter screen can be maintained in time, and the production continuity is guaranteed.

The invention discloses a safe and efficient combined concentration device for cumyl hydroperoxide and a concentration method thereof, and particularly relates to the technical field of concentration production of cumyl hydroperoxide. Comprising a raw material storage unit, a first-stage rising film evaporation separation unit, a multi-stage combined falling film evaporation separation unit, a condensation recovery unit, a vacuum system unit and a cooling storage unit, by designing the two-stage and three-stage combined falling-film evaporators, the number of the falling-film evaporators can be adjusted according to the production load requirement, and when the load is lower than the lowest flow of the combined falling-film evaporators and the requirement for film forming in the falling-film evaporators cannot be met, the falling-film evaporators can be separated. By closing feeding valves entering the second-stage falling film evaporator A or the second-stage falling film evaporator B and the third-stage falling film evaporator A or the third-stage falling film evaporator B, operation of a single set of system is kept, the film distribution effect in the falling film evaporators is ensured, the low-load operation requirement is met, double-set cooperative operation can be achieved during high load, the treatment efficiency is improved, and the energy consumption is reduced. And different productivity requirements can be perfectly met.

A rocket engine configured to run on a liquid fuel and liquid hydrogen peroxide is started by impinging high pressure streams of a fuel and liquid H2O2 into a combustion chamber under pressure and temperature conditions sufficient to decompose the liquid H2O2 into hot water stream and oxidizer and achieve ignition.

The present invention discloses a method for producing propylene oxide with low energy consumption by the cumene method, which includes: S1 reacting cumene with an oxygen-containing gas in a gas-liquid bubble column reactor to obtain an oxidation liquid with a cumene hydroperoxide concentration of 30-70%, and obtaining dry cumene hydroperoxide after removing impurities; S2 reacting the dry cumene hydroperoxide with propylene in a shell-and-tube fixed-bed reactor, and first recovering the excessive propylene from the obtained epoxidation material, and then obtaining propylene oxide and crude α,α-dimethylbenzyl alcohol through separation and purification; S3 subjecting the crude α,α-dimethylbenzyl alcohol to a hydrogenolysis reaction with hydrogen to be converted into crude cumene; S4 subjecting the crude cumene to removal of heavy components, removal of light components and alkali washing, and returning it to step S1 after removing the impurities therein. By increasing the oxidation depth of cumene in the oxidation unit, the present invention greatly reduces the circulation amount of cumene and significantly reduces the energy consumption of the device, and improves the economy of the device.

The application discloses a gas generator of an air turbine rocket engine, which comprises a shell, an ignition device, a liquid supply system and a combustion chamber; the gas generating agent used by the gas generator comprises ADN ionic liquid solution, kerosene and high-metal solid fuel; the liquid supply system comprises an ionic liquid storage tank and a kerosene storage tank, and the ionic liquid storage tank and the kerosene storage tank store ADN ionic liquid solution and kerosene respectively; the liquid supply system adopts an electric pump to supply liquid to the combustion chamber in the shell, and the electric pump is used to adjust the delivery pressure and flow rate; the ignition device is arranged in the combustion chamber, and a high-metal solid fuel grain is arranged at the tail of the inner cavity of the shell; the high-metal solid fuel grain is of an inner hole combustion type, and the surface of the central hole is of a spiral groove structure. The application has the advantages of solid high energy density and liquid adjustability, overcomes the problems of high danger of traditional hydrogen peroxide and low-temperature use of liquid oxygen, and significantly improves the specific impulse, safety and mission adaptability of the engine.