775 results about "Catalytic decomposition" patented technology

The invention provides an efficient and stable ship hybrid power generation system which comprises a hydrogen production unit and an ammonia supply system, and the hydrogen production unit comprises an ammonia decomposer, a hydrogen separator, a high-pressure hydrogen storage tank, a fuel cell and an ammonia-hydrogen internal combustion engine. The ammonia decomposer enables the ammonia flow to enter the ammonia decomposer in a segmented constant mode for catalytic decomposition through four set working conditions; the hydrogen separator is used for separating and purifying the generated mixed gas, and the separated and purified hydrogen is respectively fed into the fuel cell and the ammonia-hydrogen internal combustion engine through valves for power generation; the molten salt system recycles high-temperature tail gas of the ammonia-hydrogen internal combustion engine through the heat exchanger for heat energy storage and power generation through the steam Rankine cycle system. The regulation and control method is used for stabilizing the system and prolonging the service life of equipment by limiting the dynamic loading rate and start-stop times of the fuel cell and the ammonia-hydrogen internal combustion engine, and is used for waste heat recovery power generation through the molten salt and the steam expansion machine, so that the efficiency of the system is improved.

The detachable reactor comprises a water supply pipe, a communicating pipe and a plurality of barrel sets, each barrel set is formed by splicing a top cover, an upper barrel, an upper grating net, a main barrel, a lower grating net, a lower barrel and a bottom cover, and the bottom cover is connected with a water inlet pipe, a water drainage pipe and a series connection pipe through a first reversing valve; the top cover is provided with a water outlet pipe with a valve and flushing pipes, the water supply pipe is provided with a water supply pump and a box body, the box body is provided with a sewage pipe and a dosing mechanism, the communicating pipe is communicated with the series connection pipes and the flushing pipes and provided with a second reversing valve, inner cavities of the upper cylinder and the lower cylinder are filled with filter materials, and an inner cavity of the main cylinder is filled with catalytic filler. Sewage is filtered and catalytically decomposed by using the filter material and the catalytic filler in the cylinder group, the cylinder group is convenient to disassemble for cleaning and replacement, and series connection, parallel connection and backwashing work of the plurality of cylinder groups can be realized through cooperation of each pipeline and each valve, so that the sewage treatment effect is ensured, and the sewage treatment efficiency is improved.

The invention discloses a self-cleaning photovoltaic super-hydrophobic coating based on a nano-porous structure and a preparation method of the self-cleaning photovoltaic super-hydrophobic coating, and belongs to the technical field of photovoltaic panel coatings. The coating comprises the following components in percentage by mass: 15-25% of nano porous silicon dioxide particles, 5-10% of a low surface energy modifier, 3-8% of photocatalytic nano titanium dioxide, 30-40% of organic silicon resin and the balance of deionized water. The coating has super-hydrophobicity, photocatalytic decomposition of organic matters and wear resistance, can solve the problems of photovoltaic panel dust accumulation, bird droppings, organic matter pollution and the like, and improves the power generation efficiency of a photovoltaic system.

An atmosphere water collection coupling water electrolysis hydrogen production system comprises an electro-catalysis hydrogen production subsystem, an atmosphere water collection subsystem and an electro-catalysis oxygen production subsystem, and the atmosphere water collection subsystem is located between the electro-catalysis hydrogen production subsystem and the electro-catalysis oxygen production subsystem; a moisture absorption material is placed in the atmosphere water collection subsystem, and one side of the moisture absorption material is in contact with a cathode catalyst placed in the electro-catalysis hydrogen production subsystem to generate an electro-catalysis hydrogen production reaction; the other side of the moisture absorption material is in contact with an anode catalyst placed in the electro-catalysis oxygen production subsystem to generate an electro-catalysis oxygen production reaction; the cathode catalyst and the anode catalyst are respectively connected with two electrodes of the energy input subsystem through wires, and under the driving of the energy input subsystem, an atmospheric water electro-catalytic decomposition reaction is carried out; the atmosphere water collection technology is coupled with electro-catalytic water decomposition, atmosphere water is decomposed to produce hydrogen while atmosphere water collection is achieved, the utilization rate of atmosphere water and the efficiency of electro-catalytic decomposition of atmosphere water to produce hydrogen are improved, and the in-situ hydrogen production device has the advantages of being environmentally friendly, capable of saving energy, sustainable and the like and is an ideal in-situ hydrogen production mode.

The invention discloses a Fe-Beta molecular sieve for N2O catalytic decomposition and a preparation method of the Fe-Beta molecular sieve. According to the method, chitosan and metal Fe < 3 + > ions are complexed to form a chitosan Fe < 3 + > complex, and then the complex, a silicon source, an aluminum source and a template agent are used as raw materials to prepare the Fe-Beta molecular sieve in one step through a hydrothermal method. Hydroxyl, amino and other groups rich in a chitosan molecular chain can effectively complex metal Fe < 3 + > ions to form a stable chitosan Fe < 3 + > complex, and the stable chitosan Fe < 3 + > complex is used as a Fe source to realize uniform dispersion of Fe species in the molecular sieve and effectively reduce formation of FexOy clusters and Fe2O3 nanoparticles, so that the N2O decomposition catalytic performance of the Fe-Beta molecular sieve is improved. Inorganic alkali metal ions are not introduced, so that a large amount of ammonia-nitrogen wastewater generated in a subsequent tedious ammonium exchange process can be avoided, the synthesis period is effectively shortened, and energy consumption, material consumption and environmental pollution are reduced.

The invention belongs to the technical field of photocatalytic nanometer materials, particularly provides a low-cost photocatalyst for hydrogen production and oxygen production through pure water decomposition and a preparation method of the low-cost photocatalyst, provides an efficient photocatalytic nanometer material SrTiO3, and supports PtNix-coated CrOy as a hydrogen evolution cocatalyst and CoOOH as an oxygen evolution cocatalyst. The invention relates to a different PtNix-coated CrOy / SrTiO3 / CoOOH composite nanometer photocatalytic material with the PtNix-coated CrOy / SrTiO3 / CoOOH cocatalyst loading capacity of 0.5 wt%-5wt%. The catalyst disclosed by the invention can realize a photocatalytic reaction under ultraviolet-visible light, can realize pure water decomposition under visible light in a photocatalytic water decomposition reaction, and has excellent photocatalytic activity and relatively high photocatalytic efficiency in the photocatalytic reaction; the preparation process is simple to operate, the experimental environment is safe, the reaction condition is mild, the technical cost is low, the price of used reagents is low, expandability is achieved, and possible market demand increase in the future is met.

The invention discloses a preparation method and application of oxide coated multifunctional resin, and belongs to the technical field of new material preparation and advanced oxidation. The preparation method comprises the following steps: firstly preparing a coupling agent alcohol-water solution swelling resin, then mixing the resin with a potassium permanganate solution, then dropwise adding a mixed solution containing low-valence metal and Mn < 2 + >, forming an oxide layer on the surface of the resin after an oxidation-reduction reaction, and finally regulating and controlling the loading capacity of the oxide layer by adopting hydrothermal synthesis. According to the method, the amphiphilic characteristic of the coupling agent is utilized, so that the combination of the oxide and the resin is firmer, the active components are not easy to wear and fall off, the material performance is improved, and the service life is prolonged. The material has excellent VOCs adsorption capacity under high humidity, the outer-layer oxide has Fenton-like catalytic performance, VOCs are catalytically decomposed at normal temperature, and secondary pollutants such as nitric oxide and dioxin are prevented from being generated. And after the VOCs are adsorbed and saturated, the material can be recycled and regenerated through an advanced oxidation technology and is repeatedly used, so that the treatment cost of the VOCs is reduced.

The invention discloses a method for preparing tantalum carbide powder by carburization based on a double-effect synergistic effect of molten salt activation and catalytic decomposition, which comprises the following steps: mixing molten salt powder A and tantalum powder to obtain mixed powder, heating the mixed powder to 600-1200 DEG C for activating treatment to obtain activated tantalum powder, separately placing molten salt powder B and the activated tantalum powder in a heating furnace, heating the heating furnace to 100-200 DEG C, heating the heating furnace to 100-200 DEG C, and heating the heating furnace to 100-200 DEG C to obtain the tantalum carbide powder. The heating furnace is heated to enable the molten salt powder B to be converted into molten salt, then carbon source gas firstly flows through the molten salt to form active gas, the active gas makes contact with the activated tantalum powder to react, and the tantalum carbide powder is obtained. On one hand, the tantalum powder is subjected to surface activation treatment through the molten salt, and the reaction activity of the tantalum powder is improved; the molten salt medium assists in organic gas decomposition, the thermal decomposition efficiency of the organic gas is improved, the production energy consumption is effectively reduced under the cooperation of the molten salt auxiliary gas decomposition and the molten salt activation tantalum powder process, and the product purity and uniformity are improved.

The invention relates to the technical field of sewage treatment, and discloses a method and system for oxygenolysis of refractory pollutants based on ozone bubble water. The method comprises the following steps: carrying out grid interception, sand setting and pH regulation pretreatment on sewage; air is compressed, dried and subjected to oxygen generation, and then is introduced into an ozone generator to generate high-concentration ozone gas; enabling the pretreated effluent and ozone gas to form micro-nano bubble water in a shearing spiral-flow type generator; carrying out contact oxidation on the bubble water and the pollutants in a vertical flow reactor; preliminarily oxidized effluent enters a catalytic bed for advanced treatment; and the generated tail gas is absorbed and catalytically decomposed. According to the invention, the solubility and stability of ozone in water are improved, the contact time of ozone and pollutants is prolonged, the oxidation efficiency of ozone is enhanced, and the treatment energy consumption is reduced, so that efficient oxygenolysis of refractory pollutants is realized.

The invention discloses a method for improving the crystallinity and catalytic water decomposition performance of a polyheptazine imino carbon nitride photocatalyst, and belongs to the technical field of photocatalytic material preparation. The preparation method comprises the following steps: firstly, by taking melamine as a precursor, carrying out thermal polymerization to obtain an oligomer melt consisting of heptazine units; then carrying out high-temperature fused salt calcination treatment in a nitrogen atmosphere to obtain carbon nitride with a certain crystallinity; and adding sodium chloride as a structure regulator, fully grinding, calcining in vacuum, washing with water, and drying to obtain the crystalline-phase carbon nitride photocatalyst with high crystallinity. The method is simple, the cost is low, the actual production requirement is met, and the synthesized photocatalyst has good polymerization degree and light absorption performance, has excellent activity of fully decomposing water to produce hydrogen and oxygen under the condition of no sacrificial agent, and has the potential of realizing photocatalytic full-decomposition water diversion and the prospect of industrial application.

The invention discloses a preparation method and application of octahedral cuprous oxide containing defects, and belongs to the technical field of material preparation. In order to solve the problems that in existing cuprous oxide preparation, a defect structure is difficult to accurately regulate and control, and the crystal form uniformity is insufficient, the method comprises the steps that a copper source solution, a glucose solution, a sodium citrate solution and an ammonium fluoride solution with specific concentrations are mixed according to the volume ratio, the pH is adjusted to 10.5-11, then a hydrothermal reaction is conducted, and a target product is obtained through centrifugation, filtration, washing and drying. The method comprises the following specific steps: mixing solutions, reacting in a high-pressure reaction kettle at 140-165 DEG C for 4-6 hours, and realizing octahedral crystal form construction and defect regulation and control by controlling the raw material ratio and reaction conditions. The preparation method is simple in process and high in controllability, and the prepared octahedral cuprous oxide containing defects can serve as a catalyst to be applied to the fields of catalytic decomposition of ammonium perchlorate and the like and has good industrial application prospects.

The invention discloses an integrated closed circulation system for an RBCC engine, and solves the problems that a constant-pressure extrusion mode of an existing RBCC engine propellant supply system is not suitable for variable working condition adjustment of an RBCC rocket thrust chamber, and a high-pressure storage tank is huge in structure, large in weight and not beneficial to application and expansion of the system on the day. According to the system, high-temperature oxygen is generated through catalytic decomposition of hydrogen peroxide and acts on the turbine, then the hydrogen peroxide pump and the coal oil pump are driven to work, integrated pressurization, supply and adjustment of propellants can be carried out on the multiple rocket thrust chambers and the ramjet combustion chamber at the same time, and therefore wide-range fuel oil adjustment is met, and a widely-applied electric pump system can be replaced; and the structural envelope and weight are greatly reduced, so that the power requirement of a longer voyage is met.

The invention discloses an efficient and lasting multifunctional refrigerator deodorant which comprises the following components: (a) 50-85wt% of a porous adsorption material with a high specific surface area; (b) 5-30 wt% of a catalyst capable of effectively catalyzing and decomposing organic odor molecules in a low-temperature environment of 0-10 DEG C; and (c) 3 to 15 weight percent of long-acting slow-release type broad-spectrum antibacterial agent. According to the efficient and lasting refrigerator deodorant and the preparation method thereof, the dual effects of physical adsorption and low-temperature catalytic decomposition are utilized, multiple types of peculiar smell molecules can be rapidly adsorbed and thoroughly decomposed, and the deodorization efficiency is remarkably higher than that of a single adsorbent; the service life is greatly prolonged and is 3-5 times that of common activated carbon, the food decay speed is reduced, the food fresh-keeping period is indirectly prolonged, and food safety is guaranteed. The use process is safe and reliable, the use is convenient, external conditions such as illumination and heating are not needed, the device can be directly placed in a refrigerator, the replacement frequency is reduced due to long-term effect, and the comprehensive use cost is low.

The invention discloses an antibacterial composite material for water treatment and a preparation method thereof in the technical field of composite materials, and the antibacterial composite material is prepared from the following components in parts by weight: 20-25 parts of a magnetic nano material, 19-22 parts of acrylic acid, 6-9 parts of allylamine, 1.8-2.2 parts of N, N '-methylene bisacrylamide, 1.3-1.6 parts of azodiisobutyronitrile and 4.3-5.5 parts of plant polyphenol. Cobalt ferrite is used as a magnetic core to prepare a magnetic nano material to improve the recovery rate, acrylic acid and allylamine are used as polymeric monomers to form a polymer layer with high adsorption capacity, and plant polyphenols are combined on the surface, so that the adsorption performance and the catalytic decomposition performance are enhanced, and the antibacterial effect of the material is improved at the same time; further, the composite material with the functions of adsorbing heavy metal ions, decomposing organic pollutants and resisting and inhibiting bacteria is obtained.

The invention relates to a plant for preparing H2 by catalytically decomposing NH3. The plant according to the invention can be operated in a start-up mode in order to heat apparatuses of the plant to an increased operating temperature using a heat-transfer medium, e.g. following interruption of a continuous operation of the plant due to maintenance work. After heating to the operating temperature, the plant according to the invention can be operated in a production mode for continuous production of H2. The invention also relates to a method for starting up a plant for preparing H2 by catalytically decomposing NH3.

The invention provides an organic phosphoric acid molecule modified tungsten oxide ammonia gas sensor as well as a preparation method and application thereof, and belongs to the field of nanostructure materials and ammonia gas detection. According to the invention, the catalytic decomposition capability of organic phosphoric acid molecules on ammonia gas is utilized, so that the adsorption and catalytic oxidation of ammonia gas molecules on the surface of tungsten trioxide are promoted, and the sensitivity and selectivity of tungsten trioxide on ammonia gas are enhanced; on the other hand, phosphorus-oxygen groups in organic phosphoric acid molecules can be bonded with Lewis reaction active sites (uncoordinated W < 6 + >) on the surface of tungsten trioxide in a covalent form, so that the surface activity of tungsten trioxide is protected, and the service life of the sensor is prolonged. The result of the embodiment shows that the sensitivity of the prepared organic phosphoric acid molecule modified tungsten oxide ammonia gas sensor to ammonia gas is remarkably improved, the organic phosphoric acid molecule modified tungsten oxide ammonia gas sensor has good selectivity to ammonia gas, the performance is not obviously attenuated after 5-month test, and the service life is long.

The utility model discloses VOCS (volatile organic compounds) adsorption and catalysis integrated equipment and belongs to the field of environmental protection and waste gas treatment. VOCS adsorption and catalysis integrated equipment comprises a box body, and the interior of the box body is sequentially divided into a spraying bin, a filtering bin, an adsorption bin, a heat exchange bin, a heating bin and a catalysis bin; according to the VOCS organic waste gas treatment device, the spraying mechanism, the dry type filtering mechanism, the activated carbon layer, the desorption mechanism, the heat exchange bin, the heating bin, the catalysis bin and other components are arranged in the box body, the overall structure is small in occupied area, all the components are matched with one another, and according to the two basic principles of adsorption and catalytic combustion, comprehensive and efficient treatment on VOCS organic waste gas is achieved; the waste gas treatment equipment has the advantages that pollutants such as odor, dust and paint mist in waste gas are effectively removed, organic substances are converted into harmless substances through catalytic decomposition, the purpose of environment-friendly emission is achieved, meanwhile, the equipment has the advantages of being high in resource utilization rate, easy and convenient to operate and maintain and the like, and the waste gas treatment efficiency and economic benefits are remarkably improved.

The invention discloses an in-vehicle intelligent mosquito repelling method, and relates to the technical field of intelligent vehicle environment control, and the method comprises the steps: synchronously collecting in-vehicle multi-modal data through a sensor, and carrying out the preprocessing of the in-vehicle multi-modal data, and obtaining the preprocessed in-vehicle multi-modal data; a chemical mosquito repelling mode or a physical mosquito repelling mode is selected based on the preprocessed multi-mode data, and in-vehicle mosquito repelling control is carried out; the mosquito density at the air outlet of the air conditioner is calculated, and if the mosquito density in the unit volume exceeds the preset density, an ultraviolet LED lamp is turned on for catalytic decomposition of dimethyl phthalate residues in the air; according to the method, historical driving data of a user is obtained through a vehicle-mounted T-BOX, an LSTM neural network is adopted for mosquito occurrence probability prediction, a pre-mosquito-repelling request is pushed to a user mobile terminal according to a prediction result, and in-vehicle intelligent mosquito repelling based on multi-modal sensing is completed. Efficient, safe and low-pollution mosquito repelling measures are achieved, response can be conducted quickly, and the health and comfort of passengers are guaranteed.

The invention discloses a preparation method and application of a bimetallic sulfide / three-dimensional porous carbon catalyst, and relates to the technical field of electrolyzed water catalysts.The preparation method comprises the following steps that melamine sponge is cleaned, and the clean melamine sponge is obtained; the preparation method comprises the following steps: dissolving metal salt 1 and metal salt 2 in an ethanol aqueous solution, and adding alkali and an aniline monomer to obtain a precursor solution; completely soaking the clean melamine sponge in a precursor solution, carrying out constant-temperature hydrothermal reaction, and sequentially washing and drying to obtain the melamine sponge anchored with bimetal ions; introducing inert gas for protection, and performing high-temperature vulcanization treatment to obtain the three-dimensional porous carbon catalyst embedded with the bimetallic sulfide heterostructure. The catalyst comprises uniformly dispersed bimetallic sulfide nanoparticles and a spongy three-dimensional porous carbon carrier, shows excellent bifunctional catalytic activity and stability when being applied to an electro-catalytic water decomposition reaction, and has a wide application prospect.

The invention belongs to the technical field of nano-drugs, and discloses a multifunctional nano-drug delivery system for treating neovascular eye diseases and a preparation method of the multifunctional nano-drug delivery system. The nano drug delivery system disclosed by the invention is a composite nano preparation which takes dendritic mesoporous silica nanoparticles as a carrier and co-loads cerium zirconium oxide nano enzyme and an anti-VEGF (vascular endothelial growth factor) drug, various active oxygen can be efficiently removed, oxygen is continuously released through catalytic decomposition of hydrogen peroxide, a retina hypoxia microenvironment is improved, and the retina hypoxia effect is improved. According to the present invention, the anti-VEGF drug delivery system can reduce the oxidative stress induced retinal pigment epithelial cell apoptosis rate, reduce the inflammatory reaction, and simultaneously achieve the slow release and the controlled release of the anti-VEGF drug, and the drug effect maintenance time can achieve more than 60 days, such that the multi-target synergistic treatment can be achieved through the synergistic regulation of the multiple pathological links such as oxygen deficit-oxidative stress-inflammation-angiogenesis, and the anti-VEGF drug delivery effect can be achieved. The choroidal neovascularization can be effectively inhibited by single intravitreal injection, and a new strategy of multi-target collaborative treatment is provided for neovascular macular degeneration and other eye diseases.

The invention belongs to the technical field of catalysts and relates to a cobalt-based porous aluminum catalyst for catalytic decomposition of N2O in nitric acid production tail gas as well as a preparation method and application of the cobalt-based porous aluminum catalyst. The catalyst takes Al2O3 as a carrier, Co3O4 as an active component and KF and K2O as auxiliaries, and the preparation method comprises the following steps: firstly, uniformly dispersing a certain amount of cobalt salt, villiaumite and pseudo-boehmite in deionized water to form a turbid liquid, regulating the pH value of the turbid liquid to a certain range by taking potassium salt as a precipitant to obtain a corresponding precipitate mixture, and then carrying out suction filtration and washing on the precipitate. And drying, roasting and forming the obtained filter cake to obtain the catalyst. The preparation method is simple, and industrial amplification is easy to realize. The prepared catalyst can realize direct catalytic decomposition of N2O at a low temperature, has excellent O2 resistance, NO2 resistance and water vapor resistance, has high crushing strength, and can be well applied to emission reduction of N2O in nitric acid production tail gas.

The invention relates to the technical field of catalytic decomposition of N2O, in particular to a transition metal oxide catalyst with biomass as a surface structure control agent and application of the transition metal oxide catalyst in low-temperature catalytic decomposition of N2O. The preparation method comprises the following steps: dissolving biomass (agar) in water, adding a transition metal oxide soluble salt, heating and stirring for reaction, and after the reaction is finished, drying, grinding and calcining the obtained product to obtain a target product. The prepared catalyst takes a transition metal oxide as a catalytic main body, takes an improved sol-gel method as a preparation means, and assists the preparation of a high-activity transition metal oxide catalyst by adding low-price agar as a surface structure control agent of the catalyst, so that the performance of the catalyst for catalytically decomposing industrial waste gas N2O pollution is improved. According to the invention, chemical reaction between the agar and the transition metal oxide is utilized to achieve the purposes of increasing the specific surface area of the catalyst, destroying surface lattices and forming a large number of oxygen vacancies and lattice defects, so that the performance of the catalyst for catalytically decomposing N2O is improved.

The invention provides a formaldehyde-removing hot-melt composite elastic material and bedding using the same. The material comprises 60-80 parts of a polymer matrix, 15-25 parts of a formaldehyde catalytic decomposition agent, 5-10 parts of a polarity regulator and 0.5-2 parts of a processing aid, and is formed in one step through melt blending-hot pressing foaming. A polymer matrix is in an island phase state constructed by thermoplastic polyurethane and an ethylene-vinyl acetate copolymer through melt blending, the Shore hardness of 80A-95A and the glass transition temperature smaller than or equal to 30 DEG C are both considered, and low-temperature high resilience is achieved. The catalytic decomposition agent is compounded by MIL-101 (Cr)-NH2 and aminated carbon quantum dots according to a ratio of (3-5): 1, and formaldehyde is continuously oxidized into CO2 and H2O at normal temperature without light. The silane-modified tourmaline is used as a polarity regulator, and particle agglomeration is inhibited and an interface polarization electric field is enhanced through epoxy group covalent bonding. The density of the obtained material is 40-60 kg / m < 3 >, the aperture ratio is larger than or equal to 80%, the air permeability is larger than or equal to 500 L / (m < 2 >. S), and the material is applied to comfortable layers of mattresses, pillows or back cushions and keeps efficient formaldehyde removal and mechanical supporting functions for a long time.

The invention provides a composite polymer coconut shell charcoal tufted carpet as well as a preparation method and application thereof, and belongs to the field of polymer composite carpets. The adsorption layer is compounded on the back surface of the bonding layer, so that organic matters and toxic and harmful substances in the carpet are efficiently removed. The coconut shell charcoal in the adsorption layer is acidified by nitric acid, then an active functional group is introduced, the coconut shell charcoal and a titanium source are subjected to a hydrothermal reaction, then calcination is performed to improve the crystallinity and the interface bonding force, and the adsorption-photocatalytic decomposition dynamic cycle of volatile organic compounds is achieved. And meanwhile, interlayer adhesion is enhanced by combining a needling process, and high mechanical strength and environmental protection performance are synchronously realized. Through multi-component cooperation and process optimization, a carpet solution with functionality and durability is provided for the fields of automotive interiors and the like.

The invention relates to the technical field of combustion equipment, and discloses a pure ammonia combustor carrying ammonia catalytic combustion and decomposition compositing and a control method.The pure ammonia combustor comprises a combustion sleeve, the combustion sleeve comprises an inner sleeve body and an outer sleeve body, an outer cavity is formed between the inner sleeve body and the outer sleeve body, and the inner sleeve body is provided with an inner cavity; the inner cavity comprises a combustion nozzle, a combustion cavity and a to-be-combusted cavity, a first ignition device is arranged between the combustion cavity and the to-be-combusted cavity, the to-be-combusted cavity communicates with a first air inlet, and the outer cavity comprises a preheating cavity, a combustion catalysis cavity and a catalytic decomposition cavity; the preheating cavity is located on the periphery of the combustion cavity. The combustion catalysis cavity is located on the periphery of the to-be-combusted cavity and provided with an ammonia catalytic combustion catalyst and a second ignition device, and the catalytic decomposition cavity is provided with an ammonia catalytic decomposition catalyst and communicates with the to-be-combusted cavity. The problems that pure ammonia ignition is difficult, the laminar flow combustion speed is low, flames are difficult to stabilize, and NOx emission is high are solved.

The invention relates to a self-supporting electrode and a preparation method and application thereof, and belongs to the technical field of new energy and alkaline electro-catalytic water decomposition. A preparation method of a self-supporting electrode comprises the following steps: taking a nickel net, foamed nickel or a stainless steel net as a substrate, taking deionized water containing a ferric iron compound and phosphate as an etching solution, soaking the substrate in the etching solution at room temperature, taking out the substrate, and drying at room temperature to obtain a surface-modified self-supporting electrode; according to the method, PO4 < 3-> is introduced while the Fe / M self-supporting electrode is synthesized through a one-step etching method, so that the free energy of * OH and * O intermediates is adjusted, the valence state is adjusted, and the oxygen evolution reaction rate is increased; meanwhile, PO4 < 3-> and Fe sites act, so that the Fe coordination sites are stabilized, and precipitation of iron is prevented; the self-supporting electrode prepared by using a room-temperature one-step chemical etching method not only has good water electrolysis oxygen evolution reaction activity, stability and repeatability, but also is simple and rapid in preparation process and low in cost, and large-scale industrial production can be realized.

This application relates to the technical field of batteries, and in particular, to a composite electrode and a preparation method thereof, a battery, and an electrical device. The composite electrode includes a current collector, a first active layer, and a second active layer. The first active layer is disposed on the current collector. The second active layer is disposed on one side, oriented away from the current collector, of the first active layer. The first active layer includes a lithium manganese iron phosphate material. At least a part of a surface of the lithium manganese iron phosphate material is coated with a conductive coating material. A mass of the conductive coating material is 1% to 10% of a mass of the lithium manganese iron phosphate material. The conductivity of the lithium manganese iron phosphate material is improved by the conductive coating material. The second active layer disposed on one side, oriented away from the current collector, of the first active layer, reduces the risk of direct contact between an electrolyte solution and the lithium manganese iron phosphate material coated with the conductive coating material in the first active layer, reduces a risk of catalytic decomposition of the electrolyte solution at a high potential, alleviates the problems of gas production reactions and battery cell swelling, and alleviates capacity fading while improving the conductivity of the composite electrode.

The invention discloses preparation of a manganese-cobalt spinel catalyst and application of the manganese-cobalt spinel catalyst in catalytic ozonation of VOCs, and belongs to the technical field of materials. Comprising the following steps: adding manganese salt and cobalt salt into water for ultrasonic dissolution, dipping a honeycomb ceramic substrate into the obtained solution for growth, and taking out the treated honeycomb ceramic substrate after the solution becomes light purple; repeatedly dipping for three times; drying and calcining the honeycomb ceramic substrate subjected to dipping treatment; and soaking the calcined honeycomb ceramic substrate in an acetic acid solution, then blowing away the redundant solution in the pore channels, then soaking the honeycomb ceramic substrate in a lanthanum salt solution, taking out the honeycomb ceramic substrate, continuously blowing away the redundant solution in the pore channels, drying the honeycomb ceramic substrate, and heating and calcining the honeycomb ceramic substrate again to obtain the manganese-cobalt spinel catalyst. The manganese-cobalt spinel catalyst prepared by the method provided by the invention has 100% catalytic decomposition activity to toluene, methanol and propylene at room temperature, and has 100% catalytic decomposition activity to ethyl acetate at 53 DEG C. A test result of further simulating a real environment shows that the catalytic ozonation decomposition efficiency of the manganese-cobalt spinel catalyst to three mixed components of toluene, xylene and ethyl acetate at room temperature reaches 100%.

The invention discloses a method for treating high-concentration ammonium fluoride wastewater in the electronic industry, which specifically comprises the following steps: firstly, carrying out induced crystallization fluorine resourceful treatment to remove fluoride in the wastewater; performing enzyme catalytic decomposition of hydrogen peroxide to remove hydrogen peroxide in the wastewater; and finally, carrying out integrated anaerobic ammonia oxidation treatment to remove ammonia nitrogen in the wastewater. According to the method disclosed by the invention, a combined process of induced crystallization fluorine recycling, enzyme catalysis hydrogen peroxide decomposition and integrated anaerobic ammonia oxidation is adopted, fluoride removal and fluorine recycling are synchronously realized through an induced crystallization process, and hydrogen peroxide is efficiently removed through an enzymatic reaction; high-efficiency treatment of high-ammonia-nitrogen wastewater is realized through a short-cut nitrification-anaerobic ammonia oxidation process under a low-energy-consumption condition, and the problems of high agent consumption, high sludge yield, high operation cost and low ammonia-nitrogen removal rate of a traditional ammonium fluoride wastewater treatment process (air stripping and chemical coagulation) are solved.

The present invention relates to a catalyst for low-temperature catalytic decomposition of nitrous oxide (N2O), and a preparation method therefor, an activation method therefor and the use thereof. In the catalyst of the present invention, a rare earth metal element and an alkaline earth metal element are used as auxiliary agents to assist in dispersing active components and optimizing the electronic structure of the catalyst, and after activation by means of H2 pretreatment, the activity of catalytic decomposition of N2O is stably promoted, and a low-temperature N2O decomposition catalyst having good catalytic performance is obtained. In the preparation method for the catalyst of the present invention, the electronic structure of the catalyst is optimized by means of the co-doping of a rare earth element and the alkaline earth element Ba; subsequently, activation is carried out by means of H2 pretreatment, surface defects are generated, and the interaction between the active components and the auxiliary agents is adjusted, thereby significantly improving the activity of the catalyst on the premise that a good service life of the catalyst is maintained.