91 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 discloses a preparation method of a monatomic alloy photocatalyst, which comprises the following steps: preparing a carbon material carrier CN through grinding and roasting, dispersing the carbon material carrier CN in a solution containing a Cu element, and removing the solution through rotary evaporation to obtain a Cu-loaded carrier Cu (at) CN; and dispersing the carrier in a gold precursor solution, mixing, carrying out rotary evaporation to remove a solvent to obtain a solid, and washing and drying the solid to obtain the Cu nano-particle loaded carrier. According to the invention, metal Au atoms are doped onto Cu nanoparticles on the surface of a carrier by a method of combining wet mixing and atom replacement reduction, and the Cu nanoparticles with small size, uniform particle size and uniform distribution are presented on the surface of the catalyst. An Au-Cu monatomic metal active center on the surface of the photocatalyst is constructed to adjust Au surface charges and increase the * CO adsorption capacity, so that local high-concentration * CO on the surface of the catalyst in the reaction process is realized, a carbon-carbon coupled reaction energy barrier is reduced, and high-selectivity reaction for preparing ethanol by reducing CO2 can be realized.

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 relates to the field of catalysts, in particular to a furfuryl alcohol hydrogenation catalyst, a preparation method and application thereof and a preparation method of 1, 2-pentanediol. The furfuryl alcohol hydrogenation catalyst provided by the invention comprises a carrier, an auxiliary agent embedded in the carrier and Cu nanoparticles loaded on the carrier, the carrier is Al2O3, the auxiliary agent is selected from MgO and / or TiO2, and the content of the Cu nanoparticles is 10wt%-30wt% based on the total mass of the furfuryl alcohol hydrogenation catalyst. When the furfuryl alcohol hydrogenation catalyst provided by the invention is used for catalyzing furfuryl alcohol to prepare 1, 2-pentanediol, the technological process is simple, the reaction process is controllable, continuous preparation of a 1, 2-pentanediol product can be realized, the product quality is excellent and stable, the furfuryl alcohol hydrogenation conversion rate reaches 99.9%, and the selectivity of the product 1, 2-pentanediol reaches 60%.

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.

The invention discloses a copper-based catalyst protected by an oxide layer as well as a preparation method and application of the copper-based catalyst. The structure of the copper-based catalyst represents MOy-Cu2O / Cu, MOy is a transition metal oxide nanocluster containing oxygen vacancies, Cu is a copper nanoparticle substrate, MOy is dispersed on the Cu substrate in a coating manner, and Cu2O is distributed at a heterogeneous interface of MOy and Cu nanoparticles; and MOy is an oxide of any one of transition metals of Zn, Ga, Zr and In with oxygen defects. MOy clusters are dispersed on a heterogeneous Cu-Cu < + > substrate, Cu sites in different coordination states form a heterostructure by adopting an atmosphere induction method, the problem of CO2 activation is effectively solved, the generation efficiency of a CO2 electroreduction reaction is enhanced through the synergistic effect of Cu and Cu < + > sites, proton-electron coupling transfer kinetics is accelerated, C-C coupling is promoted, and the CO2 electroreduction reaction efficiency is improved. The high current density can be achieved under the low overpotential, and the Faraday efficiency of the generated multi-carbon product can reach 80% or above.

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 invention provides a method for preparing Cu composite small-size carbon nanospheres. The diameter of the prepared carbon nanospheres ranges from 300 nanometers to 400 nanometers, and the prepared carbon nanospheres have excellent monodispersity. The small-size carbon nanospheres are used as a supporting structure, the distance between interface Cu nanoparticles can be shortened, and therefore the signal intensity in the electrochemical sensing process is remarkably improved. In the aspect of glucose detection, the Cu composite small-size carbon nanospheres show higher sensitivity, the detection performance of the Cu composite small-size carbon nanospheres is obviously superior to that of pure Cu nanocrystals, and the enhancement coefficient can reach 1.38 times. In addition, the material has different potentials in glucose and formaldehyde detection, and shows excellent performance in nitrite detection in neutral electrolyte. According to the sensing material provided by the invention, the detection of multiple substances can be realized while the specificity is maintained.

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 invention relates to the technical field of preparation of methanol through hydrogenation of carbon dioxide, in particular to a metal Cu (at) ZnOx core-shell structure nano catalyst as well as a preparation method and application of the metal Cu (at) ZnOx core-shell structure nano catalyst. The catalyst comprises a core-shell structure and a carrier, the core structure is metal Cu nanoparticles, the shell structure is a zinc oxide thin layer, and the carrier is aluminum oxide. The surfaces of the metal Cu nanoparticles of the catalyst are wrapped by ultrathin zinc oxide (ZnOx), the catalyst has a core-shell structure, and the catalyst shows a high methanol generation rate in a reaction for preparing methanol through hydrogenation of carbon dioxide at medium and low temperatures and low pressure. The preparation method of the catalyst is simple and reliable, raw materials are easy to obtain, and the catalyst has universality.

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.

A nanoparticle composite according to an embodiment of the present invention is provided with: nanoparticles (11); the present invention relates to a nanoparticle composite having a structure in which the periphery of a nanoparticle is surrounded by a functional particle, a ligand (12) bonded to the nanoparticle, and a functional particle (13) bonded to the nanoparticle by means of the ligand, the nanoparticle composite having a structure in which the periphery of the nanoparticle is surrounded by the functional particle. In a nanoparticle composite according to another embodiment of the present invention, nanoparticles are enclosed in an aggregate structure (14) comprising a plurality of functional particles, and the nanoparticles and the aggregate structure are bonded by a ligand.