78 results about "Cu nanoparticles" patented technology

This invention discloses a method for preparing a CuZnAlGa-based layered double hydroxide (TLH)-derived catalyst for methanol production from carbon dioxide-rich syngas. Using Cu, Zn, Al, and Ga metal salts as precursors, Na₂CO₃ and NaOH as precipitants, and a mixed alcohol-water solution as an auxiliary solvent, co-precipitation is performed under controlled temperature and pH to obtain a LDH-like catalyst precursor. After high-temperature calcination and in-situ reduction in a hydrogen atmosphere, a layered framework structure of Cu nanoparticles immobilized by oxides is obtained. The LDH-like structure provides lattice confinement, preventing Cu particle aggregation, and the interaction between Cu and the oxides enhances the catalyst surface's adsorption capacity for CO and CO₂, thereby improving the activity and stability of methanol production from carbon dioxide-rich syngas.

The invention discloses a catalyst for preparing gamma-butyrolactone through liquid phase dehydrogenation of 1, 4-butanediol as well as a preparation method and application of the catalyst. Belongs to the technical field of catalyst preparation. The catalyst is composed of a carrier, CuO and MOx, the CuO and the MOx are loaded on the carrier, Cu accounts for 10-50% of the total mass of the catalyst, M accounts for 1-25% of the total mass of the catalyst, M is one of Mn, Zn, Co, Ni, Fe, Cr, Ce, Nb, Ru, Pt, Ir and Pd, and the carrier is one of silicon oxide, aluminum oxide, magnesium oxide, lanthanum oxide, hydroxyapatite and magnesium-aluminum hydrotalcite. An oxide-oxide interface is formed between CuO and MOx through roasting and reduction, and relatively strong electron interaction exists between highly dispersed Cu nanoparticles and the oxide-oxide interface, so that the stability of the catalyst can be enhanced.

The invention discloses a cobalt-copper bimetallic nitrogen-doped carbon catalyst, which is characterized in that CoCu-coated LNC, Co and Cu nanoparticles are anchored on a nitrogen-doped carbon carrier derived from lignin. Accordingly, the inventor also establishes a corresponding preparation method, and the catalyst is prepared by taking lignin as a carrier, cobalt-copper bimetal as an active component and dicyandiamide as a nitrogen source through one-pot pyrolysis. The method has the characteristics of simple and efficient process, high catalyst stability and activity, economy, high efficiency, environmental friendliness and the like. The method is used for preparing 2, 5-furandicarboxylic acid through thermal catalytic oxidation of 5-hydroxymethylfurfural, the yield of the target product FDCA almost reaches 100%, and the application prospect is wide.

The invention relates to an automobile scratch-resistant protective film and a preparation method thereof, and belongs to the technical field of automobile protective materials. The material is prepared from modified nano aluminum oxide, modified polyurethane acrylate, polyurethane acrylate, a photoinitiator, a flatting agent, an antioxidant and a solvent, the modified nano aluminum oxide is prepared through an esterification reaction of nano alpha-Al2O3 and stearic acid, and the hardness and wear resistance of a coating are enhanced; and the modified polyurethane acrylate is prepared by reacting a polyurethane prepolymer with a hydroxyl compound, so that the interface bonding force with the nano particles and the flexibility of the coating are improved. The preparation method comprises the following steps: dispersing modified nano aluminum oxide into a solvent, sequentially adding other components, and uniformly mixing to obtain functional coating slurry; the surface of a PET base material is coated with the slurry, and ultraviolet curing molding is performed after pre-drying. The prepared protective material has the characteristics of high hardness, scratch resistance, strong adhesive force with automobile paint and excellent weather resistance, and is suitable for automobile surface protection.

The invention relates to a biaxially oriented polypropylene composite film for a capacitor and a preparation method of the biaxially oriented polypropylene composite film. The biaxially oriented polypropylene composite film is of an ABA three-layer structure; wherein the layer A is prepared from the following raw materials: PP, a nucleating agent and a composite filler of MAH-g-PP and nanoparticles; the layer B is prepared from the following raw materials: PET master batch, modified silicon dioxide and a brush polymer. According to the preparation method, the three-layer structure composite film is prepared, the layers are firmly combined through covalent bonds, hydrogen-bond interaction and the like, and the interlayer peel strength is remarkably improved; a nano particle filler with a high dielectric constant is introduced into the A-layer structure, so that the dielectric strength of the film is improved, and meanwhile, the film has relatively high anti-breakdown strength; and the layer B effectively improves the mechanical stability of the film material, and has higher mechanical property and material rigidity compared with the traditional PP film.

The invention discloses a nano phase change heat storage material with high decomposition temperature as well as a preparation method and application thereof, and belongs to the technical field of mixed molten salt energy storage materials. The nanometer phase change heat storage material is composed of 99 wt% of low-melting-point mixed molten salt and 1 wt% of SiO2 nanometer particles. The low-melting-point mixed molten salt is composed of potassium nitrate, sodium nitrite and sodium nitrate according to the mass ratio of 53: (10-30): (17-37). The low-melting-point and high-decomposition-temperature nanometer phase change heat storage material with the melting point being 150-175 DEG C and the decomposition temperature being 660-723 DEG C is prepared by combining the mixed molten salt composed of potassium nitrate, sodium nitrite and sodium nitrate according to the specific dosage ratio with SiO2 nanoparticles, the melting point of the phase change material is low, energy consumption can be effectively reduced, and the energy consumption is reduced. And the composition has good decomposition temperature, melting latent heat and other thermophysical properties.

The invention belongs to the technical field of biomedicine, and discloses a nano-particle for enhancing radioimmunotherapy effect through cascade reaction and application of the nano-particle, a preparation method of the nano-particle comprises the following steps: S1, synthesis of ZnO2; the preparation method comprises the following steps: dissolving ZnCl2 and PVP in absolute ethyl alcohol, adding ammonia water and H2O2, after the reaction is completed, collecting precipitates, washing, and dispersing the precipitates in absolute ethyl alcohol to prepare ZnO2; and S2, synthesis of ZnO2 (at) Cu: resuspending ZnO2 in water, sequentially adding ammonia water, a PAA solution, IPA, dopamine hydrochloride and a CuCl2 solution, stirring in a nitrogen atmosphere, centrifuging, washing with ethanol, and drying in vacuum to obtain the ZnO2 (at) Cu nano-particles, namely the nano-particles. According to the nanoparticles, the radiotherapy effect is enhanced through cascade reaction, copper death is induced, immune response is activated, effective treatment on tumors is achieved, and the problems of radiotherapy resistance and immunosuppressive tumor microenvironment are solved.

The invention belongs to the technical field of ferrous metallurgy and material modification, and particularly relates to a preparation method of green short-process hot work die steel, which comprises the following steps: obtaining scrap steel, adding alloy, and smelting to obtain molten steel; the molten steel is refined through fluoride-free rare earth refining slag, and refined molten steel is obtained; adding a nanoparticle modifier into the refined molten steel to obtain modified molten steel; and the modified molten steel is subjected to continuous casting or die casting, and the hot work die steel is obtained. According to the method, the fluorine-free rare earth slag refining and nano particle modification combined technology is adopted, fluorine-containing refining slag and traditional electroslag remelting are effectively replaced, power consumption and carbon emission in the smelting process are reduced, the technical development requirements of current green manufacturing and dual-carbon targets are met, and green short-process manufacturing of the hot work die steel is achieved; and the prepared hot work die steel has higher cleanliness, a more uniform organization structure and more excellent thermal fatigue performance.

The invention provides a hydrophobic and oleophobic ultrathin display screen antifouling coating and a preparation process thereof, and the preparation process comprises the following steps: mixing epoxy resin or polyacrylic resin and an amino curing agent in an organic solvent, uniformly stirring, and spraying on a display screen substrate to form a resin substrate; the preparation method comprises the following steps: mixing tetraethyl orthosilicate, fluorine-containing organosilane and nanoparticles in an organic solvent, and uniformly stirring to obtain a first nanoparticle solution; mixing fluorine-containing organosilane and nanoparticles in an organic solvent, and uniformly stirring to obtain a second nanoparticle solution; mixing the first nanoparticle solution, the second nanoparticle solution and a silane coupling agent, and uniformly stirring to obtain a hydrophobic and oleophobic solution; and curing the hydrophobic and oleophobic solution on a resin substrate to obtain the hydrophobic and oleophobic ultrathin display screen antifouling coating. The preparation process is simple, and the prepared coating has excellent hydrophobic and oleophobic performance and stability.

This invention provides a supported Cu catalyst, its preparation method, and a method for preparing methyl ethyl ketone (MEK). The catalyst has the structural formula Cu-ZnAl-LDO, and the molar ratio of Cu, Zn, and Al in the catalyst is (1-4):(1-3):(1-3). The active centers of the catalyst are Cu nanoparticles rich in surface defects, with a particle size of 3-6 nm. Based on the total mass of the catalyst, the Cu loading of the active centers is 24-30 wt% (based on metal element content). The surface defects are composed of Cu nanoparticles, and the surface defect content is 52-70% based on the surface area of ​​the Cu nanoparticles. This invention achieves a uniform and stable distribution of the active center Cu nanoparticles on the support surface by employing specific material ratios and preparation methods. By controlling the crystal structure and surface electron distribution, it prevents the aggregation and deactivation of nanoparticles during high-temperature and long-term reactions, significantly improving the catalyst's stability and extending its service life.

This invention discloses a La-doped ZnFe-LDHs catalyst for stabilizing Cu nanoparticles, its preparation method, and its application in the hydrogenation of furfural to furfuryl alcohol. It belongs to the technical field of catalytic material preparation and high-value utilization of biomass resources. The catalyst uses ZnFe-LDHs as a support, Cu as the active component, and La as a modifier to prepare a catalyst with the composition La-Cu / ZnFe-LDHs. The La modifier is partially doped into the ZnFe-LDHs layers and partially distributed on the support surface as La2O2(CO3) nanoparticles. This invention achieves multi-scale stabilization of Cu nanoparticles through La doping in the ZnFe-LDHs layers and the formation of the surface La2O2(CO3) nanophase. La regulates the electronic structure of the layers, keeping Cu in a low valence state through charge redistribution, while simultaneously improving the catalyst's resistance to sintering; the surface La2O2(CO3) inhibits Cu migration through structural anchoring. The catalyst maintained a high conversion rate of 93.5% after seven cycles in the hydrogenation of furfural to furfuryl alcohol, with a Cu loading as low as 4.74 wt%, significantly improving the stability of the Cu-based catalyst.

The invention discloses a Mn2O3 / RuO2 / NCS composite nano-sphere as well as a preparation method and application thereof, and belongs to the field of oxide-like enzymes. The invention aims to overcome the defects of single active site, low electron transfer efficiency, insufficient multifunctional synergy and the like of phase metal oxide nano-enzyme. According to the invention, Mn2O3 / RuO2 / NCS composite nano-enzyme with a yolk-shell structure is synthesized by adopting a hydrothermal method, and Mn2O3 and RuO2 nano-particles are loaded on a carbon-based material with high conductivity. The material disclosed by the invention has the structural characteristics of a microsphere structure, abundant pore channels, high specific surface area, multiple active sites, high conductivity, good hydrophilicity, tight electron contact between Mn2O3 and RuO2 and the like. Oxide-like enzyme activity experiments show that the Mn2O3 / RuO2 / NCS nano-composite has very excellent nano-enzyme activity, and shows excellent affinity (Km is equal to 0.1587 mM) and reaction speed Vmax is equal to 0.02987 uM / s).

The invention belongs to the technical field of electro-catalysis, and particularly discloses a Cu nanoparticle / acidified carbon nanotube catalyst and a preparation method and application thereof.According to the preparation method, acidified pretreated carbon nanotubes with good conductivity and high specific surface area are selected as a substrate, CuO nanoparticles are evenly loaded through a hydrothermal method, and the Cu nanoparticle / acidified carbon nanotube catalyst is obtained; and growing a zeolite imidazate framework material-8 (ZIF-8) on the surface of the CuO nanoparticle-loaded carbon nanotube in situ, and regulating the thickness of an ultrathin nitrogen-carbon layer on the surface and coordination of Cu-N by regulating the calcining temperature and time. According to the Cu nanoparticle / acidified carbon nanotube catalyst as well as the preparation method and the application thereof, the Cu nanoparticles are encapsulated in a confined manner, so that long-service-life electrically-driven CO2 is converted into a high-added-value C2 + product, catalytic active sites of the Cu nanoparticles are fully exposed, the charge transfer rate is increased, and the intrinsic activity of the Cu active sites is improved.

The invention provides a titanium dioxide-copper core-shell catalyst, a preparation method and application of the catalyst in methanol synthesis, and the preparation method comprises the following steps: dispersing TiO2 nanoparticles in deionized water, adding a copper salt solution and a reducing agent into an obtained dispersion system, reducing Cu < 2 + > in the dispersion system into Cu nanoparticles in a protective atmosphere at the temperature of 40-60 DEG C, and carrying out vacuum drying to obtain the titanium dioxide-copper core-shell catalyst. Depositing on the outer surfaces of the TiO2 nanoparticles, and drying to obtain a catalyst precursor; and calcining the catalyst precursor at the temperature of 300-450 DEG C for 1-4 hours to form the titanium dioxide-copper core-shell catalyst. The TiO2 core in the catalyst can effectively isolate and stabilize the Cu nanoparticles, improve the anti-sintering ability of the Cu nanoparticles, reduce the side reaction of carbon deposition and prolong the service life of the catalyst. Under the illumination condition, photo-induced electrons of TiO2 and the plasma effect of Cu have a synergistic effect, the reaction temperature can be reduced, the methanol yield can be increased, and efficient photo-thermal synergistic catalysis is achieved.

The application provides a Pd-Cu bimetallic supported In2O3-TiO2 catalyst and a preparation method and application thereof, and belongs to the technical field of CO2 hydrogenation to prepare methanol. The catalyst comprises a composite carrier and Pd nanoparticles and Cu nanoparticles supported on the surface of the composite carrier. Pd and Cu are combined to form bimetallic sites in the application, the advantages of the bimetallic sites can be fully exerted, and the reaction activity of CO2 hydrogenation to prepare methanol can be significantly improved through the electronic effect and geometric effect between the metals. The Pd-Cu / In2O3-TiO2 catalyst provided by the application has the advantages of high conversion rate and high catalytic activity in the reaction of carbon dioxide hydrogenation to prepare methanol; wherein, in the process of carbon dioxide hydrogenation, the Pd-Cu / In2O3-TiO2 catalyst can obtain a one-way CO2 conversion rate of 23.5% and a methanol yield of 15.83% at 250 DEG C.

The invention relates to the technical field of special glass, and discloses special protective glass and a preparation method thereof.The special protective glass comprises a glass substrate and a self-healing coating coated on the surface of the glass substrate; the glass substrate consists of oxides of the following elements: a silicon source, an aluminum source, a lithium source, a sodium source, a magnesium source, a zirconium source, a phosphorus source, a titanium source, a cerium source and a tin source; the self-healing coating comprises an organosiloxane film forming component, a crosslinking component, a silane anchoring component and nanoparticles; the cross-linking component comprises a boric acid ester bond cross-linking structure and a disulfide bond cross-linking structure; the silane anchoring component comprises at least one molecule with a trialkoxy silicon group at the tail end, and the self-healing coating is combined with a silanol group on the surface of the glass substrate through a silicon-oxygen bond to form an interface covalent binding layer. According to the invention, the glass can be effectively repaired after cracks appear, so that not only is the optical performance ensured, but also the mechanical strength of the glass is enhanced.

The invention is applicable to the technical field of nano material preparation, and provides a preparation method and application of a Mn < 2 + >-MoS2-Ag surface enhanced Raman spectrum substrate, the method comprises the following steps: synthesizing a Mn < 2 + >-doped MoS2 nano material through a hydrothermal method, and loading Ag nano particles on the surface of the Mn < 2 + >-doped MoS2 nano material by using an ultrasonic-assisted chemical reduction method to obtain the Mn < 2 + >-MoS2-Ag surface enhanced Raman spectrum substrate. The substrate combines a chemical enhancement effect brought by Mn < 2 + > doping and an electromagnetic enhancement effect provided by Ag nanoparticles to form a synergistic enhancement system. When being applied to SERS (Surface Enhanced Raman Scattering) detection of trace ofloxacin in a water environment, the sensor shows excellent sensitivity and specificity, and the detection limit can reach 10 <-11 > M. The method is simple in preparation process and mild in condition, the prepared substrate is good in stability and remarkable in enhancement effect, and an effective tool is provided for rapid and high-sensitivity detection of antibiotic pollutants in the environment.

Provided is a photoresponsive material characterized by comprising nanoparticles having a perovskite-type crystal structure containing iodine at a site, and a shell-shaped ligand having a betaine group and partially coordinated to the nanoparticles, wherein the substance amount ratio of the iodine present at a site X on the surface of the nanoparticles is lower than the substance amount ratio of the iodine present at a site X inside the nanoparticles.

The present application relates to the field of catalytic materials for atmospheric pollutant control and discloses a pulse current-enhanced MOF-based catalyst, a preparation method therefor and a use thereof. In the present application, the method comprises: dissolving a copper salt and polyvinylpyrrolidone in a mixed solution of DMF and ethanol, and then adding formic acid; dissolving Cu-TCPP in the mixed solution of DMF and ethanol; then mixing the solutions obtained in the steps above until the solutions are uniformly dispersed, and heating and drying the mixture to obtain PML-Cu; weighing PML-Cu and calcining same in an inert gas to obtain PML-CuNPs; and using a pulse current to treat the PML-CuNPs to obtain Pulse-PML-CuNPs. In the present method, an active center is generated in situ in a two-dimensional MOF-based material Cu-TCPP by means of a node metal in-situ reduction method, and a synthesized two-dimensional MOF-based electrocatalyst PML-CuNPs has a single atomic layer structure and can maximize mass transfer rate. By means of the pulse current method, the present application further changes the surface state of the active center, and changes the surface roughness and valence state of Cu nanoparticles, thereby enhancing the reaction efficiency of electroreduction of CO2 into a multi-carbon product.

The application discloses a kind of pulse current enhanced MOF-based catalyst and its preparation method and application, belong to the catalytic material field of atmospheric pollutant control.The copper salt is dissolved in the mixed solution of DMF and ethanol with polyvinylpyrrolidone, and then formic acid is added;Cu-TCPP is dissolved in the mixed solution of DMF and ethanol;The above-mentioned solution is mixed and dispersed uniformly, and then heated and dried to obtain PML-Cu;PML-Cu is taken in inert gas calcination to obtain PML-CuNPs;Pulse-PML-CuNPs is obtained by treating PML-CuNPs with pulse current.This method generates active centers in-situ in two-dimensional MOF-based material Cu-TCPP by node metal in-situ reduction method, and the synthesized two-dimensional MOF-based electrocatalyst PML-CuNPs has monatomic layer structure, which can maximize mass transfer rate;The application also changes the surface state of active center by pulse current method, changes the surface roughness and valence state of Cu nanoparticles, and enhances the reaction efficiency of CO2 electroreduction to multi-carbon products.

The invention provides a bionic nano-composite, a preparation method thereof and application of the bionic nano-composite in tumor diagnosis and treatment, and belongs to the technical field of medicines. The preparation method comprises the following steps: extracting centella asiatica and ginseng polysaccharide, reacting with vitamin C to form glucoside, uniformly mixing with Mg2Si nanoparticles, gadolinium diamine, calcium chloride powder and adriamycin, ball-milling to prepare a compound, coating Au nanocage / silk fibroin peptide microspheres to form an inclusion compound, mixing with folic acid modified bionic liposome, adding into water, repeatedly extruding by using a liposome extruder of a polycarbonate film, and drying to obtain the folic acid modified bionic liposome. The bionic nano-composite is prepared. The bionic nanocomposite prepared by the invention increases targeted delivery of drugs to tumor tissues, improves drug resistance, reduces chemotherapeutic drug concentration, reduces side effects, can protect organs such as liver, heart and the like from being infringed by chemotherapeutic drugs, improves drug effects, has a relatively good anti-tumor effect, especially pancreatic cancer tumors, has a relatively good diagnosis and treatment effect, and has good application prospects. Wide application prospects are realized.

This application relates to the field of fuel cells and discloses a proton exchange membrane modified with dual inorganic fillers, comprising a Nafion composite membrane matrix; CeO2 anchored on amine-functionalized cellulose nanofibers (CNFs), wherein CeO2 accounts for 2% to 5% of the total mass of the composite membrane; SiO2 nanoparticles are added, wherein SiO2 nanoparticles account for 0.5% to 2% of the total mass of the composite membrane; and Al2O3 nanoparticles are added, wherein Al2O3 nanoparticles account for 0.5% to 2% of the total mass of the composite membrane. This invention significantly improves the hardness and compressive strength of the composite membrane by anchoring CeO2 on amine-functionalized cellulose nanofibers (CNFs) and adding SiO2 and Al2O3 nanoparticles, thereby improving its service life and reliability. Simultaneously, the addition of carbon nanotubes (CNTs) greatly enhances the electrical conductivity of the composite membrane, which is crucial for improving the output efficiency and response speed of the fuel cell, directly affecting the overall energy conversion efficiency of the battery.

The invention discloses high-refractive-index glue based on amino zirconium-based metal organic polyhedral dispersed zirconium dioxide, a glue film and a preparation method. The high-refractive-index glue is prepared from the following raw material components in parts by weight: 100 parts of acrylate copolymer, 0.05 to 0.25 part of thermal curing agent, 0.2 to 2 parts of photoinitiator, 0.3 to 2.5 parts of photo-crosslinking agent and 10 to 30 parts of Zr-MOPs / ZrO2 dispersion liquid. In the Zr-MOPs / ZrO2 dispersion liquid, through an amino-containing zirconium-based metal organic polyhedron (Zr-MOP) in-situ anchoring technology, by utilizing strong chemical bonding between amino and the surfaces of nanoparticles and a steric hindrance effect of a Zr-MOP skeleton, uniform dispersion and long-acting stability of the nanoparticles are realized by a one-step method; meanwhile, the ultraviolet aging resistance of the glue can be improved through the free radical capturing capacity of the Zr-MOP ligand, a complex modification process or toxic additives are not needed, and an efficient and low-cost solution is provided for industrial application of the high-refractive-index glue.

The application relates to the field of PVC films and discloses a high-transparency PVC film which is a multilayer composite structure and sequentially comprises, from the outside to the inside, a smart self-cleaning hydrophobic layer, a double self-repairing gradient hardness layer, a dual-fluorescent ultraviolet full-spectrum management layer, a refractive index gradient matching transparent layer, a topological network locking core layer, a magnetic field oriented nano-barrier layer and a multiple-response reversible bonding layer. The application also discloses a preparation method of the high-transparency PVC film, which comprises the preparation of functional additives and nanoparticles, the preparation of slurry / parent particles of each layer, the step-by-step gradient mixing process of the topological network locking core layer parent particles, magnetic field assisted multilayer co-extrusion and interface in-situ reaction, gradient coating and double curing, step-by-step calendering-quenching and setting, online ultraviolet irradiation treatment, multiple-response back coating treatment, heat setting and stress elimination, online multi-spectrum quality detection, the realization of the whole life cycle performance management from the surface to the body and from use to recycling and the breakthrough of the limitation of single function or simple layering of the prior art.

The invention discloses a production process of a new material for paper decoration, and relates to the technical field of decoration material production, the dependence on natural mineral products is abandoned, renewable plant fiber paper is adopted as a core base material, the radioactive risk of a raw material source is eliminated, and the environmental safety of long-term indoor use of the material is ensured; in order to solve the problems that paper is insufficient in strength and poor in weather resistance, a composite modifier containing waterborne polyurethane resin and nano silicon dioxide is designed, the modifier fully permeates into the interior and gaps of a paper fiber network through an ultrasonic-assisted impregnation technology, and in the subsequent drying and hot pressing process, the strength of the paper is greatly improved. The resin is crosslinked and has a synergistic effect with the nanoparticles, a compact organic-inorganic hybrid protection layer is formed on the surfaces of the fibers and among the fibers, and the protection layer obviously enhances the mechanical strength, wear resistance and moisture resistance of the paper, so that the paper meets the use requirements of decorative plane materials, and meanwhile, unification of safety and economical efficiency is realized.

The invention discloses a bifunctional catalytic material with electro-catalysis and photo-thermal conversion performance, and particularly relates to the technical field of electro-catalysis and photo-thermal catalysis, and the bifunctional catalytic material is oxygen-doped carbon layer packaged Cu nanoparticles (Cu (at) O-C). Meanwhile, the invention further provides a preparation method of the bifunctional catalytic material and application of the bifunctional catalytic material to ammonia production through electro-catalysis nitrate reduction and ammonia water production through photo-thermal evaporation. The carbon layer can enhance adsorption / activation of nitrate radicals and can enhance the surface local photothermal effect at the same time. The Cu-coated O-C bifunctional catalytic material obtained by the invention shows high ammonia production efficiency and photo-thermal evaporation ammonia separation efficiency.

The invention provides antibody functionalized Au and Raman signal molecule and Au nanoparticles, a sandwich structure formed by combining magnetic beads and nanoparticles and application of the sandwich structure, and belongs to the technical field of myocarditis related index detection. A Raman signal molecule is introduced into the surface of a gold nanoparticle, a gold shell layer is deposited, the surface of the gold shell layer is modified with an antibody, and the antibody functionalized Au and Raman signal molecule and Au nanoparticle is constructed. According to the invention, the silver-coated gold nanoparticles are prepared, silver on the outer layers of the silver-coated gold nanoparticles can be etched while the silver-coated gold nanoparticles and a second part of HAuCl4 are subjected to reduction reaction to coat a gold shell layer, and a nano cavity with extremely strong hot spots is formed between an inner-layer nano gold core and an outer-layer gold shell, so that amplification can be realized, and repeatable Raman signal reading can be realized; and accurate detection is promoted. The sandwich structure formed by further combining the magnetic beads and the nanoparticles can accurately and quickly realize Raman spectrum identification of five positive and negative samples of myocarditis.

The invention provides a Cu-MEL zeolite confinement catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalytic materials. According to the Cu-MEL zeolite confinement catalyst disclosed by the invention, Cu nanoparticles are confined in pores of MEL zeolite and are loaded on the surface of the MEL zeolite. The method has the advantages that according to a confinement structure, Cu nano particles are packaged in MEL zeolite pore channels, and Cu particle aggregation is inhibited through the space confinement effect of a zeolite framework; organic-inorganic synergism: zeolite pore channels contain [Cu (NH3) 4] < 2 + > or [Cu (en)] < 2 + > complex ions, so that dispersity and stability are enhanced; and surface passivation: selectively passivating Cu sites on the outer surface of the zeolite to improve the selectivity. The zeolite confinement strategy is combined with the copper-based catalyst for the first time, Cu nano particles are limited through MEL pore channels, and the industrial problem that the copper-based catalyst is prone to inactivation at high temperature is solved by combining the surface passivation technology.

The application provides a catalyst for carbon dioxide electro-reduction to ethylene and a preparation method and application thereof, adopts a multi-step self-assembly strategy, gradually constructs an Ag-N-C carrier structure and regulates spatial distribution of Cu nanoparticles and Pd monomers, realizes synergic construction of Ag monomer atom sites, Cu active sites and Pd monomer atom regulating sites, and thus forms a Pd1Cu / Ag-N-C catalytic system with multi-site division and electronic complementary effect. The catalyst shows significantly improved catalytic activity, selectivity and running stability in the process of carbon dioxide electro-reduction to ethylene. The preparation route is clear, operability is strong, component regulation is accurate, is suitable for various carbon-based carrier systems, and has good potential for large-scale preparation and application prospect in industrialization.

The invention discloses a high-hardness and high-toughness polarized light composite film as well as a preparation method, a production system and application thereof, and belongs to the technical field of polarized light composite films. The preparation method comprises the following steps: preparing a mixed coating liquid of organic / inorganic hybrid resin and nano particles, wherein the particle size of the nano particles is 20-50nm, and the content of the nano particles is 3-8%; two surfaces of the substrate layer are synchronously coated to form a symmetrical coating structure, and the thickness difference is controlled within + / -1 [mu] m; a sectional type UV curing process is adopted; dynamically adjusting process parameters according to environmental conditions; and the upper surface is coated with an anti-fingerprint / anti-dazzle functional coating. The prepared high-hardness and high-toughness polarized light composite film has the advantages of high hardness and high toughness. The production system comprises a double-sided synchronous coating device, an intelligent UV curing system, an online quality detection unit and a central control unit. The high-hardness and high-toughness polarized light composite film has a wide application prospect on a touch display screen.