17results about How to "Promote catalysis" patented technology

The invention relates to the field of materials, and discloses a three-dimensional graphene / metal oxide composite pellet and a preparation method and application field thereof, the three-dimensional graphene / metal oxide composite pellet comprises a graphene pellet and a metal oxide loaded on the graphene pellet; wherein the specific surface area of the three-dimensional graphene / metal oxide composite sphere is 50-500m < 2 > / g. In the obtained three-dimensional graphene / metal oxide composite sphere, the metal oxide is uniformly loaded on the surface of the graphene sphere, and the sphere internally has a rich pore structure, so that the application of gas sensing, catalysis, energy storage and the like is facilitated.

The invention discloses a preparation method of an aerogel composite material doped with an interface modified infrared opacifying agent, which comprises the following steps: uniformly dispersing the opacifying agent in aerogel precursor sol, and uniformly stirring to form composite sol; injecting or spraying the composite sol onto a fiber base material to form a wet gel composite material, and performing aging and supercritical drying treatment on the wet gel composite material to obtain a silicon dioxide aerogel composite material; the opacifying agent is infrared opacifying agent powder subjected to interface modification by using an interface modifier, and the interface modifier is a compound containing at least one functional group capable of forming stable-connection chemical bonds with silicon hydroxyl in an aerogel network structure and at least one functional group capable of generating strong interaction with the infrared opacifying agent powder. The infrared opacifying agent powder is any one of titanium dioxide, silicon carbide, zirconium oxide, white carbon black and ferric oxide. The method can enhance the interface bonding force, improve the dispersity, improve the stability and optimize the performance, and the preparation method is simple and easy to implement and suitable for industrial production.

The invention discloses a preparation method of CH3COO (BiO) and application of the CH3COO (BiO) in production of formic acid through reduction of CO2 under electro-catalysis. Wherein Bi < 3 + > is beneficial to activation of CO2, meanwhile, Bi0 promotes adsorption of HCO3 <-> and a proton coupling electron transfer reaction, and the Bi < 3 + > and the Bi0 jointly improve the catalytic activity of the catalyst ECO2RR. In addition, CH3COO (BiO) is of a layered structure, agglomeration of metal Bi in the electrolysis process can be avoided, the metal Bi has higher stability, and catalysis can be continuously carried out.

The present application relates to the application of open-cage borane compounds in the preparation of immunosuppressants, belonging to the technical field of biological medicine. The open-cage borane compounds of the present application include nest borane compounds and / or spider web borane compounds, and the pharmaceutically acceptable solvates or pharmaceutically acceptable complexes of the nest borane compounds and the spider web borane compounds. The open-cage boron clusters of the present application have dehydrogenase-like activity, can catalyze the dehydrogenation reaction of hydroxyl-containing organic substrates in a biological system, promote the conversion of NAD(P) + to NAD(P)H, further improve the intracellular oxidation-reduction ratio, induce cell redox stress, and further reshape the metabolic pattern of HSCs from the source, promote the differentiation of immune cells to immunosuppressive phenotype, and play an immunosuppressive role.

The present invention relates to the technical field of saturable absorbers, and in particular to a saturable absorber based on tin oxide nanoparticles, a preparation method thereof, and a ring cavity fiber laser. The ring cavity fiber laser is composed of a pump source and a ring laser resonant cavity. The ring laser resonant cavity is composed of a wavelength division multiplexer, an erbium-doped optical fiber, a polarization light isolator, a saturable absorber, a polarization controller, and an optical splitter connected in sequence. The pump source is connected to the input end of the wavelength division multiplexer. The saturable absorber is a saturable absorber based on a mixture of tin oxide nanoparticles and a film-forming agent, or a saturable absorber based on tin oxide nanoparticles deposited on the surface of a tapered optical fiber, a D-type optical fiber, or a cladding-corroded optical fiber, or a saturable absorber based on tin oxide nanoparticles filled in the air hole cladding of a photonic crystal optical fiber. The present invention can provide a new solution for the development of ultrashort pulse fiber lasers.

The present invention relates to the technical field of metal aluminum fuel energy storage and utilization, specifically to a molten aluminum combustion system and method with added stabilizer. The system of the present invention includes a molten aluminum combustion reaction device, a stabilizer production device and a steam generating device connected to the molten aluminum combustion reaction device; the molten aluminum combustion reaction device includes a combustion chamber, an ignition device, and a gas distribution device; the combustion chamber is a quartz vertical reaction chamber, with cover plates provided at the top and bottom respectively, the top gas phase outlet is connected to a cooling system and an analysis unit in sequence, and a stabilizer inlet is provided at the bottom; the ignition end of the ignition device extends into the interior of the combustion chamber; the outlet of the gas distribution device is connected to the combustion chamber; a heat exchange medium inlet, a steam inlet and a stabilizer outlet are provided on the stabilizer production device; the heat exchange medium inlet is connected to the heat exchange medium outlet of the cooling system; the stabilizer outlet is connected to the stabilizer inlet; the steam generating device includes a steam chamber provided at the top of the combustion chamber, and the steam outlet of the steam chamber is connected to the steam inlet.

A C-terminal truncated alginate lyase and its application. This invention belongs to the fields of bioengineering, genetic engineering, and enzyme engineering, and relates to a C-terminal truncated alginate lyase TY2 designed with molecular docking assistance, its encoding gene, recombinant vector, strain, and its application in the preparation of low-polymerization degree alginate oligosaccharides. Using wild-type MhAly6 as the parent, the truncation boundary was determined through structural prediction and molecular docking. A portion of the linker peptide was retained, and the C-terminal GH28 family domain was deleted to obtain the truncated form TY2. TY2 has approximately twice the specific activity of the wild-type enzyme, and even higher residual activity after incubation at 45°C for 1 hour, achieving a synergistic improvement in catalytic activity and thermal stability. + The relative enzyme activity reached 4.3 times that of the control group, which can degrade pretreated Sargassum powder. The product is mainly ΔDP2–ΔDP4 low-polymerization brown algae oligosaccharides, which are suitable for related enzymatic degradation and oligosaccharide preparation.

The invention provides an acidic ionic liquid catalyst, a preparation method and application of the acidic ionic liquid catalyst in degradation of waste textiles, relates to the technical field of catalysts, and designs a disulfonic acid metal-based ionic liquid catalyst with Bronsted-Lewis dual acidity. The problems of secondary pollution and the like caused by the fact that a traditional catalyst is toxic and difficult to separate and residues cause products with colors which cannot be removed in recycling of waste polyester cotton textiles are solved, the conversion rate of polyester fibers is increased while cotton fibers are separated out, and considerable economic benefits are obtained.

The invention relates to a high-entropy oxide catalyst, a preparation method thereof and application of the high-entropy oxide catalyst in a lithium-sulfur battery, belongs to the technical field of catalysts, and aims at solving the problems that an existing catalyst is low in catalytic activity on a positive electrode of the lithium-sulfur battery, and the prepared lithium-sulfur battery is poor in cycle performance, rate capability, capacity exertion and the like. Compared with other high-entropy oxides adopting Al, Mg, Ti or rare metals and the like, the high-entropy oxide is synthesized by adopting Cr, Co, Zn, Mn, Fe, Cu and the like which are rich in resources, so that the production cost is controlled while good catalysis and adsorption performance is ensured, and the high-entropy oxide is used as a low-cost catalyst to be applied to polysulfide catalytic conversion of the lithium-sulfur battery; when the high-entropy oxide catalyst is used as a lithium-sulfur battery catalyst, the specific capacity and the rate capability of a lithium-sulfur battery are remarkably improved, the charge-discharge polarization of the lithium-sulfur battery is reduced, and meanwhile, the practical application of Ah-level soft package is realized.

The utility model discloses waste gas treatment equipment for petrochemical industry, which relates to the technical field of waste gas treatment and comprises a waste gas pipe, one end of the waste gas pipe is communicated and connected with a pretreatment box, the pretreatment box is communicated and connected with a reaction box through a flow guide pipe, and the reaction box is communicated and connected with a sterilization box through a guide pipe. The waste gas treatment device has the advantages that the driver drives the stirring rod and the rotating rod to rotate, waste gas and a treatment medium can be stirred, the stirring rod is matched with the atomization spray head, the waste gas can be treated through the atomization spray head, and the waste gas can be treated through the atomization spray head. The contact efficiency of waste gas and a treatment medium can be improved, harmful gas can be adsorbed, absorbed or catalyzed, the waste gas treatment reaction is accelerated, the waste gas treatment efficiency and speed are improved, emission of harmful gas is reduced, and the environment and human health are protected.

The invention provides a Ni-doped rare earth metal type nano oxide as well as a preparation method and application thereof. According to the preparation method, the rare earth metal source and the Ni source are directly mixed, then the precursor is prepared, reduction is carried out, in the obtained nano oxide, Ni shows atomic-scale dispersion and mainly shows Ni < 2 + >, and rich, evenly-distributed and stable Ni-O active sites can be constructed. Besides, by the adoption of the method, the content of the Ni element in the Ni-doped rare earth metal type nano oxide can reach about 10 wt% and is far higher than the level in the prior art. In addition, according to the preparation method, synthesis raw materials are easy to obtain, the method is simple, convenient and short in time consumption, and large-scale production is easy to achieve. Tests show that the Ni-doped rare earth metal type nano oxide has excellent photo-thermal catalytic activity.

The invention belongs to the technical field of synthesis of defective or metastable MOFs (Metal-Organic Frameworks), and discloses a preparation method of high-stability MOFs with thermodynamic metastable ordered defects. Under the condition of high-concentration monocarboxylic acid and metal salt, assembly of metastable-state ordered defect MOFs in thermodynamics is realized, and synthesis of an ordered defect novel structure is realized. Compared with a disordered defect structure, the structure has ordered defects and has a larger specific surface area, a larger aperture and more open metal sites. The MOFs with ordered defects can be obtained by replacing metal salts and ligands in different proportions. Compared with a disordered defect structure, the novel structure with the ordered defect synthesized in the invention has the advantage that the performances in the aspects of catalysis, adsorption and the like are obviously improved. And more open sites and large apertures caused by ordered defects promote the catalysis of the reaction.

The invention discloses a natural fiber pipeline composite aerogel catalyst, and the preparation method thereof comprises the following steps: firstly, pre-treated wood powder is added with sodium silicate and sodium isophthalate in a certain proportion to prepare a double alkali solution, and then soaked and dried; secondly, phosphoric acid is mixed with ferric chloride, aluminum chloride and zinc chloride in a certain proportion to prepare a complex polyacid solution; finally, the dried wood powder is added with the complex polyacid solution to soak and dry to form a wood-based catalyst of natural cellulose composite aerogel. The invention combines the catalyst with the natural fiber pipeline to form a natural fiber pipeline composite aerogel catalyst with spatial stereo, high toughness, high temperature resistance, high catalysis, low cost and environmental friendliness.

The present invention provides a preparation method and application of a lithium-sulfur battery positive electrode material rich in anion and cation defects, belonging to the technical field of lithium-sulfur battery positive electrode material preparation. The present invention first reacts cobalt and zinc metal ions with sulfur-containing carboxylic acid ligands to obtain a precursor, and then undergoes a selenization reaction using Joule heat treatment technology, whereby zinc ions can be doped into the formed cobalt selenide lattice, and the sulfur element in the precursor can inhibit the complete selenization of the metal to form zinc ion-doped cobalt selenide rich in selenium vacancies, thereby obtaining a lithium-sulfur battery positive electrode material rich in anion and cation defects. Anion and cation double defects can significantly increase the charge accumulation of the catalytic center Co, weaken the Co-S bond energy and generate abundant lattice vacancies and active centers, promote the diffusion and catalysis of polysulfides on the surface of the material, thereby reducing the diffusion energy barrier and activation energy of Li2S nucleation and dissolution, promoting Li2S redox kinetics, and improving the overall performance of lithium-sulfur batteries.

This invention belongs to the field of electrochemical catalysis technology, and specifically relates to a membrane electrode electrolytic cell flow channel structure for CO2 electroreduction. The flow channel structure is disposed within the electrolytic cell and includes a main flow channel inlet, a main flow channel outlet, and at least one 180° folding unit disposed between the main flow channel inlet and the main flow channel outlet. Each 180° folding unit symmetrically branches the incoming flow channel into two sub-flow channels, forming a bidirectional convection network. All sub-flow channels eventually converge to the main flow channel outlet. The multi-folding flow channel structure reduces the pressure in the CO2 gas path, facilitating the outflow of liquid products from the flow channel for collection and analysis. Furthermore, during the cell manufacturing process, a small amount of Ag is added through a melt-cooling process, which effectively reduces the temperature of the electrolyte during the reaction. This invention employs a multi-folding MEA flow channel, significantly improving the collection capacity of CO2 reduction products, thereby increasing the efficiency of CO2 conversion to carbon products.

The invention relates to the field of film materials, in particular to a high-transparency high-temperature-resistant cooling heat-dissipation energy-saving self-cleaning film and a preparation method and application thereof. The high-transparency high-temperature-resistant energy-saving self-cleaning film is prepared from the following raw materials in parts by mass: 15 to 45 parts of basic emulsion, 25 to 65 parts of nano particles, 10 to 20 parts of functional additive, 20 to 30 parts of diluent, 2 to 3 parts of silicone oil, 1 to 3 parts of flatting agent, 2 to 5 parts of wetting agent and 1 to 3 parts of dispersing agent. The high-transparency, high-temperature-resistant, cooling, heat-dissipating, energy-saving and self-cleaning film prepared by the invention can maintain excellent high-temperature baking resistance, cooling, heat-dissipating, self-cleaning performance and mechanical properties, and also has good waterproof, aging-resistant, corrosion-resistant, antistatic and other performances; the high-transparency, high-temperature-resistant, cooling, heat-dissipating, energy-saving and self-cleaning film provided by the invention meets the diversified performance requirements of the existing traffic tool field, electronic product field, industrial field and civil field on the high-transparency, high-temperature-resistant, cooling, heat-dissipating and energy-saving self-cleaning film, realizes better comprehensive performance and long service life, has a good energy-saving effect, reduces the use cost, and has a very excellent application prospect.

The present invention relates to detergent compositions comprising protease variants and alpha-amylases or variants thereof. Furthermore, the present invention relates to methods of using the detergent compositions.