1476 results about "Catalysis" patented technology

The invention discloses a catalyst used for preparing acrylic acid and butyl ester by the dehydration of butyl lactate and a preparation method thereof. The catalyst is a composite catalyst, comprising a main catalyst A and auxiliary catalysts B, C, D and E, wherein, A is calcium sulphate, B is sulphuric acid, C is phosphate, D is alkaline matter and E is promoter. The preparation method comprises the steps as follows: five compositions A, B, C, D and E are sufficiently mixed, baked for 2-10 hours at the temperature of 200-800DEG C and formed for standby. The catalyst has high catalytic activation; under the catalysis of the catalyst, the molar yield reaches 75.1 percent and the molar selectivity of the acrylic acid and butyl ester reaches 71.5 percent. The preparation method has the advantages that the crystal structure of the main catalyst can be improved so as to be beneficial for carrying out the reaction; and the introduction of different auxiliary catalysts and quantities is helpful to improve the conversion ratio of the raw material and the product selectivity and is beneficial for improving the strength of the catalyst.

The invention discloses an arginine decarboxylase diaA enzyme mutant and application thereof in preparation of butanediamine, and belongs to the field of bioengineering. According to the invention, rational charge overturning transformation is simultaneously carried out on a pentamer meridian oligomeric interface and a dimer latitudinal oligomeric interface, so that stable assembly and efficient catalysis of the decamer under the condition of neutral to alkaline pH (7.0-9.0) are realized. Wherein positive charges are introduced into a meridian interface to weaken electrostatic repulsion, and negative charges are introduced into a latitudinal interface to enhance dimer compactness and substrate transfer efficiency. The specific enzyme activity of the representative double mutant AdiAD110K / H736E at pH 8.0 is about 35 times that of a wild type, and the representative double mutant AdiAD110K / H736E keeps a complete decamer state in a pH range of 7.0-9.0. The yield of butanediamine is up to 145.9 g / L under the whole-cell catalysis of the mutant.

The invention discloses a rational copolymerization strategy for improving the stability of an oligomeric structure of acid-induced high-order oligomeric decarboxylase AdiA in a neutral to alkaline environment and application of the rational copolymerization strategy, and belongs to the field of bioengineering. According to the strategy, rational charge overturning transformation is carried out on a pentamer radial oligomeric interface and a dimer weft-wise oligomeric interface at the same time, and stable assembly and efficient catalysis of a decamer under the condition that the pH value is from 7.0 to 9.0 from neutral to alkaline are achieved. Wherein positive charges are introduced into a meridian interface to weaken electrostatic repulsion, and negative charges are introduced into a latitudinal interface to enhance dimer compactness and substrate transfer efficiency. The specific enzyme activity of the representative double mutant AdiAD471K / E467K / H736E is 45.5 times that of a wild type when the pH value is 8.0, and the representative double mutant AdiAD471K / E467K / H736E keeps a complete decamer state when the pH value is 7.0-9.0. The yield of butanediamine is up to 156.5 g / L by using the mutant to catalyze whole cells.

The application provides a masterbatch type vulcanization aid and a preparation method thereof, a rubber composition, a rubber product and a tire. The preparation method comprises the following steps: S1, pre-reaction of stearic acid, an antioxidant and a vulcanization system to obtain a pre-reaction mixture; and S2, mixing of the pre-reaction mixture with rubber to obtain the masterbatch type vulcanization aid. Under the catalysis of stearic acid, the reagents in the antioxidant and the vulcanization system react to generate active intermediates. The active intermediates have the effect of promoting vulcanization and play the role of activating accelerators in advance, so that the active intermediates can replace the role of zinc oxide. The product after reaction is mixed with rubber, and the masterbatch formed can be used to prepare rubber products such as tires without containing zinc elements, so that zinc emission can be realized, and the environment is friendly.

The invention belongs to the technical field of chemical catalysis, and particularly relates to a preparation method of an alkali metal cation modified cobalt-nitrogen-carbon monatomic catalyst and application of the catalyst in electrosynthesis of hydrogen peroxide. The Co-N-C / X catalyst is obtained by taking a cobalt-containing compound as a metal source, mixing the metal source with a nitrogen-containing organic matter and a carbon material, performing rotary evaporation, grinding and high-temperature pyrolysis in an inert atmosphere, performing acid washing with strong acid to construct surface defects, and finally performing stirring adsorption with an alkali metal salt solution, suction filtration and drying. Alkali metal cations are physically adsorbed and anchored on the surface and interface of the Co-N-C catalyst instead of being dissolved in a solution, so that the electronic structure of Co active sites and the adsorption energy of the * OOH intermediate are optimized, and the problem of separation of alkali metal and a product is solved. When the catalyst is used for electro-catalytic oxygen reduction reaction, the H2O2 selectivity reaches up to 98%, the preparation process is simple, the cost is low, large-scale production can be realized, and the problems that the traditional method is high in energy consumption and large in pollution and the existing catalyst is insufficient in selectivity are solved.

The invention discloses a D-psicose 6-phosphate phosphatase mutant and application of the D-psicose 6-phosphate phosphatase mutant in preparation of psicose, and belongs to the technical field of enzyme engineering. According to the invention, site-directed mutagenesis is carried out on an amino acid sequence of D-psicose 6-phosphate phosphatase A6PP, and a combined mutant I21V / Y73F / R115M / T180V / L203I / Q193E is constructed, so that the substrate specificity, the thermal stability and the catalytic activity of the combined mutant are all remarkably improved. The invention further provides application of the combined mutant in preparation of psicose through multi-enzyme cascade catalysis, 150 g / L of maltodextrin can be converted into 97.7 g / L of D-psicose, the conversion rate reaches 65.1%, and the application prospect of the combined mutant in the field of food is widened.

The invention relates to the technical field of preparation of nano catalytic materials, in particular to a preparation method of hierarchical pore channel mesoporous carbon loaded metal nanoparticles. According to the invention, biomass diatomite is used as a template to construct a vertically through macroporous channel, a block copolymer is introduced to form an ordered mesoporous structure, and a pore-foaming agent is added to generate a macro-pore network in a pyrolysis process, so that a macro-pore-mesoporous-micropore three-level communicated carbon-based skeleton is realized; and a bimetallic component is loaded on the hierarchical porous mesoporous carbon in a gradient confinement manner. The material disclosed by the invention has the advantages of fast mass transfer of macropores, stable nanoparticles of mesoporous confinement and efficient catalysis of monatomic sites, and can efficiently catalyze and degrade various wastewater organic pollutants in a wide pH range.

The utility model relates to the technical field of waste gas treatment, in particular to a waste gas treatment device based on malodorous organic waste gas, which comprises a box body provided with a gas inlet, a containing cavity and a gas outlet, and the gas inlet, the containing cavity and the gas outlet form a waste gas treatment channel; the treatment assembly is arranged in the containing cavity and comprises at least two electrochemical oxidation units which are arranged in series in the air inlet direction, and each electrochemical oxidation unit is composed of an electro-catalysis set and a chemical catalyst plate which are connected. The multiple electrochemical oxidation units are arranged in the box body in the air inlet direction in series, waste gas is cooperatively treated through electro-catalysis and chemical catalysis, large-batch stink organic waste gas which is continuously and rapidly introduced can be effectively treated, it is ensured that gas at an air outlet reaches the emission standard, energy consumption is reduced, meanwhile, the treatment effect is improved, and the treatment cost is reduced. The environment-friendly requirement is met. In addition, the requirement of secondary treatment can be avoided, the overall treatment efficiency is improved, and the subsequent treatment cost is reduced.

The invention provides a self-coupling waste gas treatment system for treating VOCs in waste gas and a treatment method of the self-coupling waste gas treatment system, and belongs to the technical field of VOCs removal and recovery. The self-coupling waste gas treatment system comprises a microwave catalysis unit, wherein to-be-treated waste gas is introduced into the microwave catalysis unit, so that VOCs (Volatile Organic Compounds) are primarily decomposed and then enter a multi-stage condensation unit; the multi-stage condensation unit comprises at least two stages of condensation treatment parts and is configured to be in a cold source cyclic utilization mode, liquid separated after the waste gas to be treated is subjected to condensation treatment in the multi-stage condensation unit is recycled, and meanwhile, separated gas enters the drying adsorption unit; and the emission detection unit is configured to detect whether the purified waste gas from the drying adsorption unit reaches the emission standard or not, and the waste gas which does not reach the emission standard is re-introduced into the microwave catalysis unit to be circularly treated. The self-coupling system disclosed by the invention is high in integration level, and the whole-process efficient management and control of VOCs from pretreatment, deep recovery and fine treatment to up-to-standard emission is realized.

The invention discloses a self-cleaning composite piezoelectric ceramic membrane as well as a preparation method and application thereof, and belongs to the field of composite ceramic membranes. The technical problem that an existing ceramic membrane separation technology is poor in biomembrane pollution resisting effect is solved. According to the preparation method, the barium titanate ceramic membrane is firstly prepared to serve as the base membrane, then the copper oxide one-dimensional nanostructure is loaded on the piezoelectric ceramic substrate, and the base membrane has a large membrane surface area and can be combined with more catalysts, so that more active sites are provided for catalytic reaction; according to the composite membrane, the hydrophilicity, the anti-pollution performance and the piezoelectric catalysis self-cleaning performance of the membrane are remarkably improved, and pollutants in water can be quickly and effectively separated, so that the flux and the anti-pollution performance of the membrane are improved.

The invention relates to the technical field of fuels and additives thereof, in particular to an alcohol fuel with a catalytic effect and an additive thereof.The alcohol fuel with the catalytic effect comprises C1-C7 alcohol and hydrocarbon, and a rare earth compound catalytic material is used in the fuel; the rare earth compound comprises a hydroxyl group or a phenyl group or a C5-C25 group or a carboxyl group or an amino group or a metal, the alcohol fuel is high in formula calorific value adjustable calorific value, can well adapt to an internal combustion engine or an engine for testing the alcohol fuel, is a novel alternative energy with potential, and can be used for preparing the alcohol fuel. The environmental protection problem of fossil fuel is solved, and the fuel efficiency is accelerated.

The utility model relates to a treatment system for purifying high-salinity wastewater, which is suitable for treating high-salinity wastewater, particularly desulfurization wastewater of a coal-fired power plant and coal chemical wastewater. By combining efficient flocculation, ozone catalysis and membrane distillation technologies, a self-made chitosan-based flocculant is added in a flocculation stage, and suspended solids and heavy metal ions in wastewater are removed by utilizing good adsorption performance and flocculation capacity of the self-made chitosan-based flocculant; in the ozone catalysis stage, a self-made ternary composite catalyst is added, ozone decomposition is promoted, and organic pollutants are further removed; in the membrane distillation stage, a self-made antifouling and moisture-resistant composite membrane is used for efficient desalination and concentration, and finally efficient purification and recycling of the high-salinity wastewater are achieved. The process can significantly improve the wastewater treatment effect, reduce the concentration of salt and harmful substances in the wastewater, also reduce the operation cost, and is suitable for large-scale industrial wastewater treatment.

The utility model discloses a microwave catalysis Fenton synergistic reaction device for organic wastewater treatment, which relates to the field of white spirit wastewater treatment and comprises a reaction box, a microwave generator for generating a microwave field into the reaction box is arranged on the reaction box, and a driving mechanism and an air pump are further arranged on the reaction box. A stirring shaft of the driving mechanism extends into the reaction box, a stirring blade is arranged on the stirring shaft, a plurality of air holes are formed in the stirring blade, and the air pump is communicated with the air holes. According to the device, gas generated by the gas pump acts into the reaction tank, so that the mixing strength of wastewater and a Fenton reagent in the reaction tank can be improved, the purpose of cooling the wastewater can be achieved, and the oxidative degradation capacity of organic pollutants in the wastewater is improved.

The invention relates to the technical field of polymer degradable materials, in particular to a biodegradable material as well as a preparation method and application thereof. The material takes modified polylactic acid as a main body, and an antioxidant, a plasticizer, a flame retardant and an inorganic filler are used as auxiliary materials in parts by weight. The method is characterized in that lactic acid and an epicatechin imidazole ammonium chloride polymer are polymerized under the catalysis of stannous octoate, and an epicatechin bioactive group is introduced into a polylactic acid main chain in a chemical bonding manner, so that the biodegradation rate, the mechanical property and the thermal stability of the material are remarkably improved. Bioactive substances and ionic groups in the material promote microbial degradation, and the material can be completely decomposed in a compost environment in a short time; meanwhile, the strength, the toughness and the high-temperature processability of the polylactic acid are effectively improved through molecular-level enhancement and an ionic cross-linking effect. The material can be widely applied to the fields of disposable tableware, food packaging films, degradable agricultural mulching films and the like.

The invention provides an industrial electrode for synthesizing urea through electro-catalysis C-N coupling and a preparation method and application of the industrial electrode, and belongs to the field of urea synthesizing.The industrial electrode for synthesizing urea through electro-catalysis C-N coupling comprises a conductive substrate and an electro-catalysis material coating the surface of the conductive substrate; the electrocatalytic material comprises a magnesium oxide modified copper oxide catalyst, and MgO nanoparticles and CuO nanoparticles in the magnesium oxide modified copper oxide catalyst are in contact with each other to form a heterostructure. The magnesium oxide modified copper oxide catalyst is used as an electro-catalysis material, MgO nano-particles and CuO nano-particles in the catalyst material are in contact with each other to form a heterostructure, after MgO is introduced, the CO2 adsorption and activation capacity is improved, CO and NHx coupling is promoted, and the urea Faraday efficiency is improved. The industrial electrode shows excellent selectivity and stability in the process of electro-catalytic synthesis of urea.

The invention discloses a preparation method of battery-grade lithium trifluoromethanesulfinate, which comprises the following steps: reacting sodium trifluoromethanesulfinate with benzyl halide in a solvent to prepare benzyl trifluoromethyl sulfone, and carrying out hydrogenation reduction on the benzyl trifluoromethyl sulfone under the catalysis of a catalyst to prepare trifluoromethanesulfinic acid, according to the method, all the adopted raw materials are industrial chemicals and are low in price and easy to obtain, the reaction process is mild and controllable, the product purity is high, the battery use requirement is met, and the method has the industrialization prospect.

The utility model discloses a waste gas heating and catalyzing treatment device for a tobacco factory, relates to the technical field of waste gas treatment, and aims to solve the problems that the process of starting a machine body of heating and catalyzing equipment is complicated, and a catalyzing part in the heating and catalyzing equipment is difficult to take out and replace. A pushing mechanism is arranged on the outer wall of the rear end of the heating catalytic device; a sealing assembly for blocking the through hole is arranged on the outer wall of the front end of the heating catalytic device; a cam rotates to extrude a stress plate, the stress plate pushes a moving plate to move through a sliding rod, a catalytic plate is pushed out through a through hole, a sealing door is pulled to move through a handle, a fixing block pushes an inserting rod, when the fixing block moves to an inserting groove and coincides with the inserting rod, a third spring pushes the inserting rod to be inserted into the inserting groove, and the catalytic plate is pushed out through the through hole. The sealing door is locked and limited, blocking of the through hole is relieved, and the problems that the process is tedious when the machine body of the heating catalytic equipment is started, and a catalytic part in the heating catalytic equipment is not easy to take out and replace are effectively solved.

The invention belongs to the technical field of catalytic materials, particularly relates to an electrocatalytic anode oxygen evolution reaction catalyst based on an anion exchange membrane electrolytic cell, and particularly relates to a high-entropy oxide electrocatalyst and a preparation method thereof. The high-entropy oxide electrocatalyst is composed of five metal elements of Ni, Co, Fe, Mn and Al, is loaded on a foamed nickel substrate, has a nanosheet structure, is rich in oxygen vacancies on the surface, has excellent electrochemical catalysis performance and stability, and is suitable for electrocatalysis of an electrolytic water anode side in an alkaline environment. According to the preparation method of the high-entropy oxide electrocatalyst, foamed nickel is used as a substrate, salts of five metals of Ni, Co, Fe, Mn and Al which are equal in mole are subjected to hydrothermal synthesis to form a precursor, and then the high-entropy oxide electrocatalyst is prepared through self-etching, annealing oxidation and acid etching, and the high-entropy oxide electrocatalyst is easy and convenient to operate, good in repeatability, controllable in cost, excellent in performance and suitable for large-scale production.

According to the conductive gel grinding tool provided by the invention, the foamy copper framework is added on the basis of a conventional gel resin grinding tool, and the conductive gel grinding tool is prepared according to specific steps, so that the grinding tool has conductivity; during polishing, the conductive gel grinding tool is connected with the negative electrode of a power source to serve as a cathode, polishing liquid is matched, and an electrolytic reaction can occur in a polishing area on the surface of the grinding tool. Correspondingly, the invention further provides an electro-Fenton catalysis auxiliary polishing method. According to the method, electro-Fenton catalytic auxiliary polishing of the hard and brittle materials is achieved through the conductive gel grinding tool with the specific structure, the polishing efficiency is high, little iron-containing sludge is generated, and environmental pollution is small; generation of hydroxyl free radicals in a polishing solution in a machining area is controlled through the electro-Fenton effect, oxidation of the surface of a workpiece is achieved, then an oxidation layer on the surface of the workpiece is mechanically removed through a conductive gel grinding tool, the workpiece and the grinding tool do not need to be soaked in an electrolytic solution for polishing, the electro-Fenton auxiliary polishing device and the operation process are simplified, and the practical value is high.

The invention discloses a coupling adsorption-photo-thermal catalysis underground CO gradient absorption method, and relates to the technical field of underground CO gradient absorption, and the method comprises the following steps: in-situ loading plasma enhanced photo-thermal catalysis nanoparticles on the surface of a modified metal organic framework material to construct a dynamic coupling layer; the dynamic coupling layer is integrated in a modular reaction unit with a gas circulation channel to form an underground CO treatment basic unit; according to the method, underground CO treatment basic units are arranged along a ventilation main path and an easy-to-accumulate area of an underground roadway, each reaction unit is provided with an independent and controllable near-infrared light source, and high-precision CO concentration sensors are installed on the periphery of each reaction unit, so that a distributed monitoring and response network is formed; cO concentration data at the positions of all the reaction units are collected based on the distributed monitoring and response network, a spatial gradient distribution diagram of underground CO concentration is generated based on spatial continuity characteristics, and an abnormal area with the concentration higher than a safety threshold value is recognized.

The invention relates to the technical field of waste drilling fluid treatment, and discloses a modifier for treating water-based drilling waste and a preparation method thereof.The modifier is prepared from, by weight, 30-40 parts of potassium persulfate, 10-25 parts of ferric trichloride, 20-40 parts of quaternary ammonium cationic polymer and 10-20 parts of magnetized modified attapulgite clay. According to the modifier for treating the water-based drilling waste, through the synergistic effect of all the components, an oxidation-catalysis-flocculation-magnetic separation four-stage synergistic treatment process is formed, the problem that gel breaking is not thorough in the water-based drilling waste treatment process is solved, the content of metal ions in a liquid phase after solid-liquid separation is reduced, and the water-based drilling waste treatment effect is improved. The water distribution requirement of the drilling fluid can be met under the condition that the liquid phase does not need to be further treated, the treatment process is simplified, and the cost is reduced.

The invention relates to the technical field of aerogel composite materials, and discloses an aerogel composite fiber material and a preparation method and application thereof.The aerogel composite fiber material comprises, by weight, 15-50% of polysilazane fibers and 50-85% of a silicon dioxide aerogel matrix, the polysilazane fibers and the silicon dioxide aerogel matrix are connected through Si-O-Si chemical bonding, and an inert passivation layer is arranged at the interface of the two. The preparation method comprises the following steps: immersing the polysilazane fiber in silicon source precursor sol to carry out in-situ catalytic gelation; carrying out gas phase treatment on the obtained alcogel composite material, and forming an inert passivation layer on the surface of the fiber by utilizing a generated by-product; and carrying out normal-pressure drying on the composite material subjected to gas phase treatment. Through in-situ catalysis and interface self-passivation design, the interface bonding strength and the mechanical property of the material are remarkably enhanced, normal-pressure drying of the material is achieved through gas phase treatment, the process is simplified, and the production cost is reduced.

The invention relates to the technical field of chemical engineering, and discloses a hydrogen peroxide stabilizer and a preparation method thereof.The stabilizer is obtained in the mode that alpha-chlorinated acrylic acid and functional monomers are subjected to free radical polymerization and then hydrolyzed; the functional monomer is obtained by firstly carrying out ammonolysis reaction on diethylenetriamine and allyl glycidyl ether to obtain an intermediate, then mixing the intermediate with sodium chloroacetate and carrying out reaction under an alkaline condition, and by introducing the functional monomer containing the carboxylic acid group, the stability of hydrogen peroxide is improved; and invalid decomposition caused by metal ion catalysis is reduced.

The invention relates to an installation for liquefying hydrogen, comprising a circuit for hydrogen to be cooled, a set of heat exchanger(s) in heat exchange with the circuit, a cooling system comprising a refrigerator with a cycle of refrigeration of a first cycle gas comprising helium and / or hydrogen, the circuit comprising at least one catalysis section so as to ensure conversion of the ortho-hydrogen into para-hydrogen, the circuit further comprising a first bypass portion bypassing at least one catalysis section, the downstream end of the circuit comprising two parallel branches that are not combined and are supplied respectively with the hydrogen that has passed through the first bypass portion and hydrogen that has passed through the catalysis section so as to provide two distinct hydrogen streams that have different relative proportions of ortho-hydrogen and para-hydrogen.

The invention relates to the technical field of air purification, and discloses a space air particle differentiation system and a control method thereof.The space air particle differentiation system comprises an air particle separation module and a control module, the air particle separation module comprises an air inlet, a cyclone separation barrel and a detachable dust collection barrel, the cyclone separation barrel separates particles in air through centrifugal force classification, and the separated particles fall into the bottom dust collection barrel; the ultraviolet catalysis module comprises an ultraviolet reaction chamber, the inner wall of the ultraviolet reaction chamber is coated with a photocatalyst, and a UV-C light source is configured and used for decomposing organic pollutants and microorganisms; the electron-ozone reaction module comprises a mixed flow pipeline fan and an exhaust port, the mixed flow pipeline fan forms negative pressure airflow in the system, and purified air is exhausted through the exhaust port. Through cooperation of cyclone separation, ultraviolet catalysis and electron-ozone reaction, large particles are removed through cyclone separation, organic matter is decomposed through ultraviolet catalysis, microorganisms and superfine particles are oxidized and decomposed in a reaction chamber through electron flow and ozone, the maintenance period is prolonged, and efficient consumable-free purification is achieved.

The invention provides a method for synthesizing diethyl adipate through dynamic covalent chemical regulation. Comprising the following steps: S1, sequentially adding 80-120g of adipic acid, 160-240mL of absolute ethyl alcohol, 5-8g of a difunctional dynamic regulation and control carrier, 2-4g of a ternary composite catalyst, 1-2g of a synergistic additive and 100-150mL of a mixed solvent consisting of cyclohexane and methylbenzene into a 500mL four-neck flask provided with a thermometer, a water segregator and a pH sensor, and adjusting the initial pH value to 8.0-8.5; stirring and reacting for 6 to 8 hours at the rotating speed of 450 to 500r / min under the condition of 70 to 75 DEG C; and S2, after the reaction is finished, cooling to 25 DEG C, separating and recovering the bifunctional dynamic regulation and control carrier and the ternary composite catalyst, introducing CO2 into the filtrate to regulate the pH value to 5.0-5.5, releasing the captured moisture, and carrying out reduced pressure distillation under the conditions of 80-90 DEG C and-0.08 MPa to obtain diethyl adipate. By means of the rare earth ion-carbon quantum dot-ionic liquid ternary composite catalyst, efficient catalysis under the strong acid-free condition is achieved, and the catalyst recovery rate and the product purity are greatly improved.

The invention relates to the technical field of material preparation and environmental catalysis, and particularly discloses a nitrogen and sulfur co-doped algae-based carbon loaded cobalt monatomic catalyst which is formed by compounding nitrogen and sulfur co-doped algae-based porous carbon, cobalt monatomic and cobalt nanoclusters. The total loading amount of cobalt in the catalyst is 1.2-1.3 wt%. The nitrogen-sulfur co-doped algae-based carbon-loaded cobalt monatomic catalyst prepared by the preparation method disclosed by the invention is combined with persulfate, so that rapid activation and degradation of pollutants can be realized in a short time, and the catalyst has remarkable dynamic advantages and catalytic efficiency and long-term stability.

The invention provides a cobalt modified multistage heterostructure catalyst and a preparation method and application thereof, and belongs to the technical field of ammonia synthesis. The cobalt modified Con-Cu3P / Cu catalyst is prepared by depositing copper and cobalt on a substrate step by step and then carrying out calcination, phosphorization and electrochemical reduction. In the catalyst, the metal Co mainly exists in the catalyst in the form of an elementary substance, Cu exists in the form of elementary substance Cu and monovalent Cu3P, and the problem that protonation of an intermediate is limited is solved by modifying and regulating an electronic structure through Co. The Co-Cu3P / Cu catalyst is used for electro-catalysis nitrate reduction reaction (NO3RR), and sustainable green ammonia (NH3) synthesis and nitrate (NO3 <->) pollutant removal can be achieved.

The invention discloses a production method of water-resistant spherical silica gel for a catalyst carrier, and belongs to the technical field of new silica gel materials. The method comprises the following steps: taking a sodium silicate aqueous solution or alkoxy silane as a silicon source, mixing the silicon source with a template agent according to a mass ratio of 100: (1-10), adding nano silicon dioxide, and carrying out ultrasonic dispersion to obtain uniform sol; mixing the sol and a non-polar organic solvent according to a volume ratio of 1: (3-8) to form an oil-in-water emulsion, and dropwise adding a promoting solution to form microspheres with an average particle size of 400 [mu] m; mixing the microspheres with a pore expanding agent according to a mass ratio of 1: (8-15), and carrying out hydrothermal reaction to obtain a skeleton; reacting the skeleton with a silicon-based modifier according to a mass ratio of 10: (0.2-1.5); activating by hydrofluoric acid, and grafting a bifunctional coupling agent on the surface; supercritical extraction and thermal activation treatment. The specific surface area of the prepared silica gel is 492.7-533.0 m < 2 > / g, the pore volume is 0.83-1.04 cm < 3 > / g, the pore diameter is 8.2-10.9 nm, the water-resistant strength retention rate is 90.8-94.4%, the compressive strength is 10.7-12.6 MPa, the particle size variation coefficient is 3.1-4.3%, compared with traditional silica gel, the specific surface area of the silica gel is remarkably improved, and the silica gel is suitable for the field of wet catalysis.

According to the fisetin nanoparticle preparation method, the fisetin nanoparticle product and the application, the synergistic effect of amino acid catalysis and a microwave or ultrasonic energy field is matched with mixing self-assembly and subsequent spray drying forming under the acidic condition, on one hand, the traditional Maillard reaction period is greatly shortened, and energy consumption is reduced; on one hand, the whole technological process of wall material preparation and active ingredient loading is simplified, the large-scale production requirement is met, on the other hand, the fisetin encapsulation effect and the nanoparticle structure stability are improved, the defects that fisetin is poor in water solubility and low in bioavailability are overcome, meanwhile, it is guaranteed that the nanoparticle product quality is uniform, the technology efficiency and the product performance superiority are considered, and the method is suitable for industrial production. The core pain points of low efficiency, poor drug loading effect and insufficient product stability of the existing traditional process are effectively overcome.