282 results about "Catalytic decomposition" patented technology

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 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 discloses an indoor intelligent formaldehyde detection and purification device and a use method thereof. The device comprises a movable shell, a self-adaptive intelligent control system, a pretreatment unit, an efficient adsorption unit and a core catalysis unit. The pre-treatment unit is used for filtering and dehumidifying, the efficient adsorption unit is used for adsorbing formaldehyde and desorbing to realize regeneration of a composite adsorbent layer, and the core catalysis unit is used for catalytically decomposing formaldehyde and desorbed formaldehyde; and the self-adaptive intelligent control system is used for acquiring outdoor air data, dynamically tracking formaldehyde pollution and regulating and controlling purification. Through three stages of units, in combination with a multi-stage cooperative processing and intelligent feedback control technology, formaldehyde is efficiently and directionally removed by virtue of a three-stage linkage mechanism of pre-adsorption enrichment, gradient desorption regeneration and catalytic deep decomposition, the selectivity is good, safety is realized, no extra volatile organic compound is released, and the catalytic efficiency is high; adsorbent regeneration improves stability and reduces cost.

The present invention relates to reactors and reactor components which have good resistance to NH3 and N2 and possibly to H2O at high temperatures and moderate pressures and thus can be used in industrial-scale reactions for the catalytic decomposition of NH3 into N2 and H2.

The application discloses a bifunctional In-doped Ni2Mo3N@Mo2C binary heterojunction catalyst and a preparation method and application thereof. A dimethyl imidazole solution is slowly added into a Mo salt solution to obtain a suspension liquid containing a Mo metal organic framework Mo-MOF; the suspension liquid is left to stand, and a precipitate is centrifuged and washed, and vacuum dried to obtain the Mo-MOF containing the Mo metal organic framework; a Ni salt, an In salt and the Mo-MOF are added into an anhydrous ethanol solution to perform ion exchange, and the precursor is vacuum dried to obtain the bifunctional In-doped Ni2Mo3N@Mo2C binary heterojunction catalyst. The catalyst material has excellent basic oxygen evolution and urea oxidation activity, and has a good application prospect in electrocatalytic decomposition of water, urea-assisted electrolysis of water and treatment of sewage containing urea.

The application discloses a metal surface heat treatment device with a self-diagnosis function and a treatment method, relates to the technical field of metal heat treatment devices, and comprises a main base, the upper surface of the main base is provided with a cooling soaking pool, and the upper surface of the main base is further provided with an auxiliary mechanism; the auxiliary mechanism comprises a material conveying component and a gas collecting assembly; the material conveying component comprises a conveying frame body arranged on the upper surface of the cooling soaking pool and provided with a feeding conveyor belt on the upper surface; the gas collecting assembly is composed of a detection component and a processing component; the gas collecting assembly comprises a side base connected with one side surface of the main base, and the upper surface of the side base is provided with a treatment box body; and the processing component comprises a regenerative catalytic oxidizer and a receiving pool. In the scheme, the gas collecting assembly can intelligently collect organic mist generated during metal quenching, and the organic mist is treated through condensation or catalytic decomposition; in addition, the treatment product can be reused to improve the performance of the cooling liquid.

The invention discloses a carbon dioxide catalytic decomposition material which is characterized in that the main effective component of the carbon dioxide catalytic decomposition material is biomass activated carbon / Rh2O3 / NiO phase. The material provided by the invention can more efficiently and stably realize the treatment of decomposing and converting carbon dioxide into carbon monoxide, so that the material is more beneficial to large-scale production and preparation.

The invention relates to the technical field of ammunition destruction flue gas treatment, in particular to a flue gas purification device for ammunition destruction and a use method thereof, and the flue gas purification device comprises a quench tower, a rotational flow spray chamber, a dry adsorption bin, a catalytic decomposition reactor and a discharge monitoring terminal; according to the device, rapid cooling, acid gas neutralization, organic matter and heavy metal adsorption and NOx catalytic reduction are achieved for high-temperature and high-toxicity flue gas generated by ammunition pyrolysis through a multi-stage collaborative purification process, PLC intelligent control and online monitoring are integrated, and three operation modes of conventional operation, emergency operation and regeneration are supported; the system can effectively improve the purification efficiency, realizes independent maintenance of the module, dynamically responds to the destroying working condition change, and ensures that the emission reaches the standard.

The invention discloses decorative cement with formaldehyde adsorption and catalytic decomposition functions and a preparation and construction method thereof, and belongs to the technical field of building materials. The decorative cement is prepared from the following dry powder raw materials in parts by weight: 78-83 parts of an inorganic powdery cementing material, 4-6 parts of a formaldehyde adsorption catalytic decomposition component A, 9-13 parts of a formaldehyde adsorption catalytic decomposition component B and 2-3 parts of an additive. Through compounding of multiple components, efficient adsorption, catalytic oxidation and thorough decomposition of formaldehyde can be achieved under the conditions of normal temperature, normal pressure and natural light, and meanwhile the comprehensive functions of long-acting formaldehyde removal, moisture resistance, bacterium resistance and the like are achieved. The material is simple and convenient in preparation process, can be smeared or sprayed after being mixed with water according to a water-binder ratio during construction, is good in construction performance, can be used as an indoor wall decoration material to replace traditional plastering gypsum, and has environment friendliness, high efficiency and durability.

The invention relates to a plant for producing H2 by catalytic decomposition of NH3. The plant according to the invention can be operated in a start-up mode in order to heat the devices of the plant to an elevated operating temperature using a heat transfer medium, for example after interruption of the continuous operation of the plant due to maintenance work. After heating to an operating temperature, the apparatus of the invention may be operated in a production mode to continuously produce H2. The invention also relates to a method for starting up a plant for producing H2 by catalytic decomposition of NH3.

The invention discloses preparation of a nickel and cerium doped cobalt-based catalyst and application of the nickel and cerium doped cobalt-based catalyst in catalytic decomposition of nitrous oxide. The nickel and cerium doped cobalt-based catalyst is of a Ni and Ce co-doped spinel type Co3O4 structure and has a mesoporous structure, and the molar ratio of cobalt to nickel to cerium is 1: 0.12: 0.04. The preparation method comprises the following steps: preparing a mixed solution in which the molar ratio of cobalt nitrate to nickel nitrate to cerium nitrate is 1: 0.12: 0.04 by adopting a coprecipitation method, adding sodium carbonate as a coprecipitator into the mixed solution, adjusting the pH value of the mixed solution to 9 while stirring, carrying out coprecipitation and aging, then washing and drying the precipitate, and roasting for 3 hours in an air atmosphere at 300-400 DEG C to obtain the nickel and cerium doped cobalt-based catalyst. The catalyst provided by the invention has good low-temperature nitrous oxide decomposition capability and anti-interference capability under complex working conditions.

The invention discloses a sulfonated MXene sensing layer, a preparation method thereof and a biosensor, and belongs to the technical field of electrochemical sensors. The sensing layer contains a sulfonated MXene material, and the sulfonated MXene material is obtained by performing covalent bond modification on a sulfonic acid group on the MXene material. According to the preparation method, sulfonic acid groups are covalently grafted on the surface of MXene through plasma treatment, so that the MXene has high specific surface area, excellent electron conductivity, efficient enzyme immobilization capability and H2O2 catalytic decomposition activity. The biosensor constructed based on the sensing layer comprises a flexible substrate, a three-electrode system and a limited diffusion layer, the response speed, the detection precision, the stability and the anti-interference performance (such as uric acid resistance and ascorbic acid resistance) of the sensor are remarkably improved, and the biosensor is particularly suitable for being applied to an implantable continuous glucose monitoring system.

The application discloses a gold leaching method for pyrite-containing gold ore, and comprises the following steps: after the pyrite-containing gold ore is finely ground, water is added to obtain a slurry; a gold leaching reagent solution is added into the slurry to obtain a mixed leaching solution; the pH value of the mixed leaching solution is adjusted to alkaline, and leaching treatment is performed; and after filtration, a gold-containing leaching solution is obtained; the gold leaching reagent solution comprises polyphosphate, copper salt and thiosulfate; in the gold leaching reagent, polyphosphate is added; under alkaline conditions, polyphosphate ions can be selectively adsorbed or complexed on the surface active sites of pyrite to form a physical or chemical masking layer, thereby effectively blocking the direct contact of pyrite with dissolved oxygen and thiosulfate in the solution, inhibiting the catalytic decomposition of pyrite, significantly reducing the invalid consumption of thiosulfate, stabilizing the pH value and potential of the leaching system, and guaranteeing the efficient leaching of gold.

This invention relates to the field of automatic control technology, specifically to a method for stabilizing and controlling the effective chlorine content of sodium hypochlorite solution. During the cooling stage of the sodium hypochlorite solution, an online electrochemical sensor acquires the concentration signal of free trace metal ions in the solution. When the signal reaches a preset threshold of the controller, the controller instructs a peristaltic pump to add a compound stabilizer to the solution. The compound stabilizer is prepared by mixing a specific short peptide containing cysteine ​​and histidine with a silicate buffer solution. After adding the compound stabilizer, the solution undergoes short-term ultrasonic cavitation treatment. This method uses a specific short peptide instead of traditional aminopolycarboxylate salts, avoiding the breaking and failure of carbon-nitrogen bonds under strong oxidizing conditions, preventing secondary release of metal ions that could trigger catalytic decomposition, extending the effective chlorine half-life, and reducing the amount of chlorate byproducts generated.

The utility model relates to the technical field of organic waste gas treatment, in particular to a catalytic decomposition device for organic waste gas, which comprises a main body, the inner wall of the main body is fixedly connected with a plurality of support frames, the top of each support frame is provided with a limit frame, the inside of each limit frame is provided with a mounting cavity, and the mounting cavities are communicated with the main body. A mounting cavity is formed in the main body, a catalyst is fixedly connected to the interior of the mounting cavity, a compressed air discharge pipe is fixedly connected to the interior of the mounting cavity, the compressed air discharge pipe is located below the catalyst, a plurality of through holes are formed in the lower surface of the compressed air discharge pipe, and a waste gas inlet pipe is fixedly connected to the back face of the main body; the waste gas inlet pipe is located below the supporting frame. The utility model provides equipment capable of supplementing oxygen at any time and assisting rapid catalytic decomposition of organic waste gas.

The application provides a self-driven BCG-nanoparticle complex and a preparation method thereof, and belongs to the fields of biological medicine and nanomaterials. The complex is a composite of BCG and cerium oxide nanoparticles with urease activity, the cerium oxide nanoparticles are coupled to the surface of the BCG in an asymmetric distribution through modified polyethyleneimine, and specifically, the surface of the BCG is connected to several modified polyethyleneimine derivatives through chemical bonds and electrostatic adsorption, and the polyethyleneimine derivatives wrap the cerium oxide nanoparticles through electrostatic adsorption. The complex can be self-driven by using the gas release and ion concentration change caused by the catalytic decomposition of urea in the environment, significantly enhances the adhesion and retention of BCG on the bladder wall, effectively overcomes the defects of low delivery efficiency and insufficient immune activation of traditional BCG therapy, simultaneously improves the tumor immune microenvironment, and can be used for preparing high-efficiency and low-toxicity bladder cancer treatment drugs.

The utility model provides a waste gas treatment device for battery production, which belongs to the technical field of environment-friendly equipment for battery production and comprises a spraying tank, and a treatment mechanism is arranged on one side of the spraying tank. According to the utility model, the treatment mechanism is arranged, so that the spraying and washing pretreatment of the battery production waste gas is realized, a uniform mist curtain is formed through the spraying ring and the atomizing nozzle, the mist curtain is in full contact with the waste gas, soluble acid-base and harmful volatile matters are efficiently absorbed, the filter plate is arranged in front to intercept large-particle impurities, the gas-liquid contact time is prolonged, and the purification effect is improved; the flow guide structure collects waste liquid in a centralized mode, multi-stage deep adsorption catalytic purification of waste gas is achieved through the arranged adsorption assembly, plug-in type modular design is adopted, and through the synergistic effect of an alkali-impregnated porous ceramic plate, an activated aluminum oxide catalytic plate and a zeolite molecular sieve plate, acidic substances are neutralized, organic matter is catalytically decomposed, and VOCs and heavy metal are adsorbed; and the plate can be quickly pulled and replaced and is convenient to maintain.

The present application mainly relates to the technical field of pollution gas prevention and treatment, and particularly relates to a preparation method and application of a transition metal oxide catalyst for high-efficiency catalytic decomposition of N2O pollution. The preparation method is as follows: a specific surfactant is dissolved in deionized water, inorganic acid is added, stirring is performed until the mixture is miscible, transition metal nitrate is added, reaction is performed until a gel is formed, drying is performed to obtain a dry gel, calcination is performed, and the target catalyst is obtained. The prepared catalyst 10TX-Co3O4 has extremely high low-temperature catalytic activity, and the catalytic conversion rate of N2O reaches 90% at 300 DEG C; and under the condition of coexistence of O2, NO x , H2O impurity gas and N2O (simulated tail gas of a nitric acid plant), the catalyst still has high catalytic activity and stability (81% conversion rate at 400 DEG C). The present application provides a plurality of high-activity low-temperature catalysts for catalytic decomposition of N2O, and provides a wider train of thought for subsequent design of the catalyst and effective development and utilization of the additives.

The invention discloses a synbiotics-like feed prepared from vegetable waste polymerized vegetable cakes and a method, and relates to the field of agricultural circular economy, cellulose in vegetable waste cell walls is effectively decomposed under mild conditions through a specific catalytic decomposition enzyme combination, and part of cellulose is converted into carbon dioxide and water, so that the utilization rate of the cellulose is improved. By combining physical heat energy conduction, liquid in cell vesicles is heated to generate micro air pressure to break through residual cell walls, so that recessive water in cells is successfully converted into surface dominant water, the energy consumption in the dehydration process is greatly reduced, and the loss of dry basis substances in the resource utilization process is effectively reduced; the vegetable cake product obtained through final polymerization is rich in various nutrient substances such as crude fibers and / or dietary fibers, proteins, vitamin C and carbohydrates, the recycling rate of the vegetable waste is larger than or equal to 95%, the recycling efficiency and the additional value are remarkably improved, meanwhile, the difficulty of subsequent harmless treatment is reduced from the source, and the economic input and the treatment cost are reduced.

The utility model relates to the technical field of photoelectric hydrogen production reaction, in particular to a photoelectric catalytic water splitting hydrogen production reaction device which comprises a controller and a circular base, a gear is rotationally connected to the top of the base, a plurality of fixing shafts are fixedly connected to the top of the base in the circumferential direction, each fixing shaft is sleeved with a rotating sleeve, the rotating sleeves are rotationally matched with the fixing shafts, sector gears are fixedly connected to the side walls of the rotating sleeves, and the sector gears are meshed with the gear; electrolytic tanks are fixedly connected to the side walls of the rotating sleeves; the top of one fixing shaft is fixedly connected with an L-shaped rod, and the bottom of the transverse end of the L-shaped rod is fixedly connected with a driving piece. The top of the gear is coaxially and fixedly connected with a screw, and the top of the screw is coaxially and fixedly connected with an output shaft of the driving part; a sealing cover is in threaded fit with the screw rod and is positioned above the electrolytic tank; the sealing covers are in vertical sliding fit with the fixing shafts; and an electrolysis assembly is arranged on the sealing cover. According to the utility model, the efficiency and the automation degree of hydrogen production by photoelectrocatalytic water decomposition can be effectively improved.

This invention discloses the application of Ru-based Schiff base metal COFs in the decomposition of formic acid to produce hydrogen, comprising the following steps: anhydrous formic acid is used as the reactant, and an alkali is added and mixed to obtain a reaction solution; under nitrogen or argon protection, Ru-based Schiff base metal COFs are added to the reaction solution as a heterogeneous catalyst, and a thermal reaction is carried out at 60-110℃, collecting the product gas; the large π bonds formed by the metal COFs endow the catalyst with overall electron-rich properties; more importantly, the ligands have large steric hindrance and structural rigidity, which can effectively protect the metal center, prevent its aggregation and deactivation, and extend the service life of the catalyst; the application of Ru-based Schiff base metal COFs in heterogeneous catalytic decomposition of formic acid to produce hydrogen exhibits superior catalytic performance and high catalytic conversion efficiency compared with existing heterogeneous catalysts for formic acid to produce hydrogen, and is also conducive to large-scale production.

The invention relates to the technical field of waste gas treatment, and provides a semiconductor industrial waste gas treatment method and system. The method comprises the following steps: controlling a deoxidation reaction unit to carry out deoxidation treatment on the semiconductor industrial waste gas; controlling a gas concentration detection unit to detect the oxygen concentration of the deoxidized waste gas; under the condition that the oxygen concentration is smaller than a first concentration threshold value, the plasma reactor is controlled to carry out plasma treatment on the deoxidized waste gas; and predicting the residual service life of the deoxidizer in the deoxidation reaction unit, and replacing or regenerating the deoxidizer under the condition that the residual service life is less than a service life threshold value. According to the method, pre-deoxidation is utilized, generation of nitrogen oxide is inhibited from the source, the deoxidizing agent is predicted and replaced or regenerated in time by utilizing the remaining service life of the deoxidizing agent, sustainability is achieved, operation of semiconductor high-precision equipment and the yield of products are not affected, and catalytic decomposition efficiency of the nitrogen oxide and energy consumption of thermal decomposition do not need to be considered.

The invention relates to the technical field of photocatalysis, in particular to a strontium bismuth vanadium oxide photocatalyst and a preparation method and application thereof.The chemical formula of the photocatalyst is Sr3. 59Bi19.41 V4O42, the crystal structure of the photocatalyst belongs to an orthorhombic system, the space group of the photocatalyst is Immm, and the photocatalyst is of a unique layered structure composed of cation triple plate layers; the photocatalyst is synthesized by a molten salt method, and shows the activity of photocatalytic decomposition of water to produce oxygen under visible light. The preparation method comprises the following steps: mixing and grinding SrO, Bi2O3 and VO precursors with a molten salt medium, and then carrying out temperature programming calcination to synthesize a target product; the catalyst prepared by the method has the characteristics of high crystallinity, few defects and regular morphology, the photocatalytic oxygen production performance of the catalyst is remarkably superior to that of a same-component sample synthesized by a traditional solid-phase method, and photocatalytic water decomposition and oxygen production can be realized by taking a silver nitrate, ferric nitrate, ferric chloride or potassium ferricyanide aqueous solution as a sacrificial agent system under the irradiation of visible light with the wavelength of more than or equal to 420 nm.

The application discloses a composite solid decoloring powder and a preparation method thereof, and belongs to the technical field of water treatment agent preparation. The modified nano titanium dioxide is obtained by coating titanium dioxide with 3-methyl acrylic acid sulfopropyl potassium salt grafted polydopamine. The titanium dioxide has photocatalytic effect and antibacterial property, can catalytically decompose pollutants in sewage, inhibit the breeding of bacteria in water, and can catalytically decompose free formaldehyde in dicyandiamide formaldehyde polycondensate. The modified nano titanium dioxide is loaded on phenolic resin foam, and after calcination, the nano titanium dioxide / foam carbon powder is formed. The large specific surface area and porous property of the foam carbon can increase the capture and fixation of free formaldehyde, and can synergistically accelerate the catalytic degradation of formaldehyde with the titanium dioxide. The dicyandiamide formaldehyde polycondensate grafted with castor oil is in-situ polymerized on the surface of the matrix. The castor oil grafting can significantly improve the dicyandiamide formaldehyde polycondensate, significantly increase the molecular weight, and increase the capture capacity.

A method of decomposing particulate pollutants present in exhaust gases is disclosed. Also disclosed are compositions for use in the method for cleaning exhaust gases, as well as methods of preparing said compositions. Also disclosed are systems configured to carry out a decomposition process to remove particulate pollutants from exhaust gas.