470 results about "Metal oxide nanoparticles" patented technology

The invention belongs to the technical field of diaphragms, and particularly relates to an organic-inorganic composite spongy porous diaphragm as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing a polyarylether high polymer material, a pore-foaming agent, metal oxide nanoparticles and an organic solvent, and carrying out defoaming treatment to obtain a membrane casting solution; preparing the membrane casting solution into a liquid membrane; the liquid film is placed in a wet air atmosphere for pre-phase inversion, in the pre-phase inversion process, water vapor in wet air and an organic solvent in the liquid film are subjected to preliminary exchange, a through spongy porous structure is induced to be formed in the liquid film, and a spongy porous liquid film is obtained; and placing the spongy porous liquid membrane in an extracting agent for phase inversion to obtain the organic-inorganic composite spongy porous diaphragm. The preparation method provided by the invention not only overcomes the defects of the existing diaphragm in pore channel connectivity and pore diameter control, but also remarkably improves the hydrophilic performance of the diaphragm, and greatly reduces the resistance at the same time.

The invention provides conductive paste, a solar cell, a preparation method of the solar cell and a photovoltaic module. The conductive paste comprises the following components in parts by weight: 70-85 parts of silver powder, 3-8 parts of glass powder, 0.1-2 parts of an additive and 12-25 parts of an organic carrier, wherein the silver powder comprises spherical silver powder and flaky silver powder; the glass powder is prepared from the following components in parts by weight: 65 to 75 parts of Bi2O3, 18 to 25 parts of TeO2 and 8 to 12 parts of V2O5; the additive is a carbon material and / or conductive metal oxide nanoparticles; the organic carrier comprises an infrared absorbing material; the infrared absorption material is selected from any one or more of copper phthalocyanine, a polyaniline-carbon nanotube compound and a tungsten oxide nanowire. The conductive paste can improve the conductivity of the conductive paste and improve the efficiency of the conductive paste in a laser sintering process, so that the contact resistivity is reduced, and the photoelectric conversion efficiency of a photovoltaic solar cell is improved.

The invention belongs to the technical field of preparation of sensor materials, and particularly relates to a room-temperature formaldehyde sensor material based on a catalytic principle as well as preparation and application of the room-temperature formaldehyde sensor material. The polyphenol is adsorbed on the surface of the semiconductor metal oxide through chelation, then noble metal ions are introduced, and the polyphenol on the surface of the semiconductor metal oxide can capture the noble metal ions and reduce and stabilize the noble metal ions on the surface of the semiconductor metal oxide; the noble metal nanoparticles are anchored on the surfaces of the semiconductor metal oxide nanoparticles, the original morphology of the semiconductor metal oxide is maintained, and the noble metal nanoparticles are loaded on the surfaces of the semiconductor metal oxide nanoparticles. The nano composite material not only has the intrinsic electrical and thermodynamic properties of semiconductor metal oxide, but also combines the catalytic characteristics of noble metal nanoparticles, so that the lower detection limit of formaldehyde is reduced to 3ppb, and the sensitivity of the sensor is remarkably improved. The preparation method of the room-temperature formaldehyde sensing material is simple and suitable for large-scale production, the raw materials are simple and easy to obtain, the cost is low, and the materials are environment-friendly.

The invention provides a tip Raman-based metal oxide nanoparticle in-situ detection method, which comprises: S1, dispersing metal oxide nanoparticles in a nanoparticle dispersion liquid, focusing laser to the tip of a nanometer tip through an objective lens, capturing a single nanoparticle by using an optical tweezers technology, and attaching the single nanoparticle to the nanometer tip; s2, focusing Raman laser on a nano needle tip-particle interface, generating a local high-temperature field through a photo-thermal near-field coupling effect, triggering a thermal chemical reaction of nano particles, and synchronously collecting a Raman spectrum; and S3, carrying out pretreatment and characteristic peak analysis on the collected Raman signal of the Raman spectrum, and determining the reaction critical temperature and the dynamic process in combination with temperature calibration data. According to the invention, capture and accurate heating of the nanoparticles are realized through photo-thermal coupling of the optical tweezers and the needle tip, and thermal chemical reaction monitoring of the nanoparticles is realized.

The invention provides an electrolyte for quickly charging a sodium-ion battery without a negative electrode. The electrolyte comprises a sodium salt, a solvent and an additive. According to the electrolyte, metal oxide nanoparticles are introduced as a first additive, and a second additive is supplemented, so that rapid desolvation of sodium ions on an electrode interface and improvement of the ionic conductivity of an electrolyte body are realized at the same time, and compact and dendrite-free sodium deposition under high current density is realized. The negative-electrode-free sodium-ion battery prepared from the electrolyte can be quickly charged, and good cycling stability and high capacity retention ratio can be maintained, so that the use requirements of people can be met.

The present invention relates to the nanoparticles (NP) of the invention, compositions thereof and their use as therapeutic agents, in particular in the field of oncology and / or as imaging agents. The NPs consist of first nanoparticles of at least one high-Z metal oxide material, to which smaller second nanoparticles are covalently bonded at the surface of the first nanoparticles. The second nanoparticles consist of a) at least one noble metal or at least one metal oxide, metal sulfide, metal selenide or metal sulfide / selenide as a Fenton or Fenton-like reaction catalyst. The NPs of the invention produce a surprising therapeutic effect when exposed to ionizing radiation such as X-rays, gamma-rays, protons, neutrons, radioisotopes and / or electron beams. Therefore, these NPs can be used as radiosensitizers in the field of oncology. These nanoparticles can also be used as contrast agents.

The invention belongs to the technical field of building material admixtures, and particularly relates to a difunctional gypsum admixture based on plant polyphenol-nano particles and a preparation method of the difunctional gypsum admixture. The preparation method comprises the following steps: adding plant polyphenol into a metal oxide nanoparticle dispersion liquid, adjusting the pH value, and filtering, washing and drying after reaction to obtain the difunctional gypsum admixture. The gypsum admixture provided by the invention can delay the setting time of gypsum and increase the plasticity time of gypsum slurry, after 10-50% of the admixture is introduced based on the mass of gypsum, the initial setting time of the gypsum is prolonged to 20-80 min, and meanwhile, efficient shielding of the gypsum to X-rays can be realized; meanwhile, the problem that metal oxide nanoparticles cannot be uniformly and stably loaded on gypsum crystals is solved.

The invention discloses a 6H scratch-resistant acrylic plate as well as a preparation method and application thereof, and belongs to the technical field of high polymer materials. The acrylic plate comprises a first hardening coating, a PMMA (polymethyl methacrylate) layer and a second hardening coating from top to bottom. The scratch-resistant acrylic plate provided by the invention adopts an innovative hard liquid composition, and comprises polyurethane acrylic resin, an active monomer, metal oxide nanoparticles, a photoinitiator and an auxiliary agent. Compared with an existing scratch-resistant coating material, the scratch-resistant coating material has the advantages that the polyurethane acrylic resin is used as a main film forming substance and is combined with the active monomer and the photoinitiator, so that a high-hardness coating can be quickly formed under a photocuring condition, the formula of the coating is simplified, and the wear resistance, the toughness and the optical performance of the coating are effectively improved; the composition avoids dependence on traditional hardeners and solvents, reduces emission of volatile organic compounds, and is more environment-friendly.

The invention discloses a polymer microextraction column for in-situ growth of a metal organic framework material (MOF), which is prepared by the following steps: firstly preparing a polymer monolithic column matrix with rich metal oxide nanoparticles on the surface, and then introducing an organic linking agent solution into the monolithic column to realize self-assembly of the metal oxide and the organic linking agent on the surface of the polymer. And thus, the hybrid polymer micro-extraction column for MOF in-situ growth is obtained. The polymer micro-extraction column prepared by the invention combines the advantages of the flexible porous polymer and the rigid MOF, and has continuous large through holes and micro-mesopores with abundant acting sites; meanwhile, the microextraction column material is rich in fluorine atoms and open metal sites, can provide hydrogen bonds, F-F affinity, Lewis acid / alkali complexation and the like, has a specific enrichment effect on persistent organic fluorine pollutants such as perfluorinated compounds and fluorine aromatic hydrocarbon compounds, and has a very good application prospect in the aspect of pretreatment of environment and biological samples.

A nano composite, a nanoparticle ink composition including a solvent and the nanocomposite, and a light-emitting device including a first electrode, a second electrode facing the first electrode, and an interlayer between the first electrode and the second electrode, wherein the interlayer includes an emission layer, and at least one layer included in the interlayer is made from the nanoparticle ink composition. The nano composite includes: a metal oxide nanoparticle; and a chelating ligand bonded to a surface of the nanoparticle and including a cyclic moiety.

The invention provides an interface regulation and control method of a perovskite solar cell, a trans-perovskite solar cell and a preparation method of the trans-perovskite solar cell. The interface regulation and control method comprises the following steps: arranging a first metal oxide nanoparticle layer between a hole transport layer and a transparent conductive film glass layer; and a second metal oxide nanoparticle layer is arranged between the hole transport layer and the perovskite light absorption layer. The trans-perovskite solar cell comprises a transparent conductive film glass layer, a first metal oxide nanoparticle layer, a hole transport layer, a second metal oxide nanoparticle layer, a perovskite light absorption layer, an electron transport layer and an electrode. According to the interface regulation and control method provided by the invention, the surface wettability of the hole transport layer is improved, the arrangement uniformity of the hole transport layer is improved, and finally the photoelectric conversion efficiency of the perovskite solar cell is improved.

The colored heat-insulating aerogel and the preparation method and application thereof are provided for the first time, metal ions are adsorbed on the surface of graphene oxide through the adsorption effect of oxygen-containing functional groups on the surface of graphene oxide on the metal ions, a water-plastic foaming method is used, and foaming and subsequent plasticizing processes are reasonably controlled, so that the color heat-insulating aerogel is obtained. The surface tension of a solvent is utilized to enhance the interface bonding of a foamed graphene aerogel skeleton, a surface-to-surface lapped graphene continuous dome network is formed, a thermal shock rapid heating and cooling mode is used, a graphene oxide sacrificial template is removed, uniform and fine metal oxide nanoparticles are formed, aggregation of the metal oxide nanoparticles is inhibited, and the graphene aerogel is prepared. The size of metal oxide nanoparticles is reduced, the metal oxide ceramic with a similar graphene aerogel continuous dome network structure can be obtained, and the prepared colorful ceramic is placed in customized laminated glass, so that the laminated glass has the properties of heat insulation and specific wavelength light absorption.

A display device comprises: a display region having a plurality of pixels; and a frame region, the display region including: a thin-film transistor layer; a light-emitting-element layer provided above the thin-film transistor layer; and a sealing layer provided above the light-emitting-element layer, the light-emitting-element layer including: a first electrode; a second electrode; a light-emitting layer provided between the first electrode and the second electrode; and an electron-transport layer provided between the light-emitting layer and the second electrode, and the electron-transport layer containing: nanoparticles of metal oxide; and a binding resin.

Provided is a metal oxide dispersion having excellent gap-fill performance, and a method of manufacturing a metal oxide film using the same. A metal oxide dispersion according to a first aspect of the present invention contains carboxylic acid having 9 or more carbon atoms, metal oxide nanoparticles surface-treated with a capping agent, and a solvent. A metal oxide dispersion according to a second aspect of the present invention contains carboxylic acid having a boiling point of 250° C. or higher at an atmospheric pressure, metal oxide nanoparticles surface-treated with a capping agent, and a solvent. A method of manufacturing a metal oxide film according to a third aspect of the present invention comprises: a step for forming a coating film formed of the metal oxide dispersion described above; and a step for heating the coating film at a temperature of 165° C. or higher.

The invention discloses a photoresist composition and a patterning method thereof, the photoresist composition comprises an organic solvent, a free radical photoinitiator, a co-initiator and a film-forming monomer, the film-forming monomer is metal oxygen cluster and metal oxide nanoparticles, the mass percentage content of the film-forming monomer is 1-30%, the mass percentage content of the co-initiator is 1-30%, and the mass percentage content of the film-forming monomer is 1-30%. The mass percentage content of the free radical photoinitiator is 0.01%-3%, the mass percentage content of the auxiliary initiator is 0-10%, and the mass percentage content of the organic solvent is 57%-98.99%. According to the photoresist composition introduced with the free radical photoinitiator, free radicals are efficiently generated under illumination, cross-linking polymerization of double bonds on the surfaces of metal oxygen clusters and metal oxide nanoparticles is promoted, the photosensitive performance is greatly improved, excellent sensitivity is shown in extreme ultraviolet, electron beams and visible light (within the light source range of 250-600 nanometers), and high-precision photoetching patterning is achieved.

The invention belongs to the technical field of advanced functional materials, and particularly relates to a reversible adhesive material with strong tangential adhesion, weak normal adhesion and long-term stability as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing surface-modified magnetic metal oxide nanoparticles serving as a reinforcement with rubber, pouring the mixture onto an SU-8 soft template with a micro wedge-shaped array structure, inducing the magnetic nano-reinforced particles to generate gradient rearrangement through a magnetic field, and curing and demolding to obtain the wedge-shaped structure gradient-reinforced reversible adhesive material. The composite material has strong tangential adhesion performance, weak normal adhesion performance, long-term stability and the like, and is widely applied to the fields of aerospace, robots, biomedicine and the like.

The invention belongs to the technical field of diaphragms, and particularly relates to a cellulose and cellulose derivative doped composite diaphragm as well as a preparation method and application thereof.The preparation method comprises the following steps: adding a thermoplastic organic high-molecular polymer, a cellulose derivative and metal oxide nanoparticles into an organic solvent, dissolving, adding a pore-foaming agent, and uniformly stirring; uniformly mixing, defoaming to obtain a membrane casting solution, and blade-coating to obtain a liquid membrane; the liquid film is placed in a wet air atmosphere with the relative humidity of 30%-80% for pre-phase inversion, in the pre-phase inversion process, water vapor in wet air permeates into the liquid film and exchanges with the organic solvent in the liquid film, and a wet film is obtained; and immersing the wet membrane into an extracting agent for phase conversion to obtain the cellulose and derivative doped composite diaphragm. According to the preparation method, safe operation of the diaphragm can be ensured, the electrolytic efficiency of the diaphragm is remarkably improved, and the diaphragm is excellent in stability of long-time operation.

A ZrO2 / CaSiO3 / g-C3N4 nanocomposite material includes spherical metal oxide nanoparticles which include a ZrO2 phase and a CaSiO3 phase dispersed on a matrix of g-C3N4 nanosheets. The spherical metal oxide nanoparticles have an average particle diameter in a range from 3 to 18 nanometers (nm). The ZrO2 / CaSiO3 / g-C3N4 nanocomposite material has a Brunauer-Emmett-Teller (BET) surface area greater than or equal to 55 square meters per gram (m2·g−1).

As a charge-transporting ink composition which has improved dispersibility of metal oxide nanoparticles in an organic solvent and which enables the achievement of a film that has charge transport properties and excellent flatness, the present invention provides a charge-transporting ink composition that contains: an organic solvent; and surface-treated metal oxide nanoparticles which each have a core that is composed of a nanoparticle of one or more metal oxides selected from the group consisting of oxides of a metal selected from the group consisting of Ti, Fe, Zr, Sn, Ta, Nb, Y, Mo, W, Pb, In, Bi, and Sr, and composites of at least two of these oxides, wherein the surface of the core is coated with a metal oxide, and the surface of the metal oxide is coated with at least one surface treatment agent.

The invention discloses a preparation method of metal oxide nano-particles with controllable particle sizes, and belongs to the field of nano-material preparation. According to two modes of existing literature data and experimental synthesis, a data set of process parameters and nano metal oxide particle size distribution in the preparation process is obtained; variables and product particle sizes in the database are processed through calculation and analysis methods such as one-heat coding, data normalization and model explanatory analysis, a prediction model is constructed, and the prediction model is embedded into a Bayesian optimization algorithm to construct a key process parameter reverse design platform; according to the target particle size required to be synthesized, synthesis process parameters can be obtained by utilizing a reverse design platform, so that the metal oxide is prepared, and the particle size controllable synthesis of the three nanoparticles of titanium oxide, zirconium oxide and cerium oxide is verified through experiments.

The invention relates to the technical field of solar cells, in particular to a preparation method of a perovskite thin film, which comprises the following steps: sequentially carrying out ultrasonic cleaning on etched transparent conductive glass by using a preset solution, drying in a forced air drying oven, and carrying out ultraviolet ozone treatment to obtain a transparent conductive oxide substrate; placing the transparent conductive oxide substrate in a glove box in a nitrogen atmosphere to prepare a hole transport layer; adding the perovskite precursor material into a corresponding solvent in a preset proportion, and then stirring and oscillating to obtain a perovskite precursor solution; and spin-coating the perovskite precursor solution on the hole transport layer by using a spin coater, dropwise adding an anti-solvent during spin-coating, and placing the obtained perovskite light absorption film layer on a heating stage for annealing after spin-coating is finished, the insulation metal oxide nanoparticles and the self-assembly monomolecular material are doped in the anti-solvent, so that the absorption of incident light by the perovskite thin film is improved, and the defect of the perovskite thin film at the grain boundary is passivated.

The invention discloses a water-based fire extinguishing agent based on inorganic silicon dioxide aerogel loaded metal oxide nanoparticles, a preparation method and application. The fire extinguishing agent is prepared from, by mass, 1%-5% of silicon dioxide aerogel loaded metal oxide nanoparticles, 1%-10% of a foaming agent, 0.1%-2% of a stabilizer, 1%-10% of a flame retardant, 0.5%-5% of an anti-freezing agent, 0.1%-1% of a preservative and the balance water. The silicon dioxide aerogel loaded metal oxide nano-particles are prepared by the following steps: preparing a silicon dioxide aerogel skeleton, preparing metal oxide nano-particles, and modifying, loading and drying silane. The preparation method comprises the following steps: firstly preparing a dispersion liquid A containing the composite particles and a solution B containing the functional additive, and then carrying out mixing and ultrasonic treatment to obtain the product. The fire extinguishing agent can rapidly extinguish 314Ah lithium iron phosphate battery fire, efficiently consumes HF / CO and other gases, and is stable in system, environmentally friendly and suitable for battery fire prevention and control.

The present disclosure provides a metal oxide nanoparticle comprising a metal oxide, the metal capable of being a Lewis acid; a polymer comprising an ionisable moiety; and an amino acid; wherein a weight ratio of amino acid to 5 polymer is about 0.1:99.9 to about 99.9:0.1; wherein the amino acid is electrostatically interacting with the polymer; wherein the metal oxide comprises metal ions in a 3+ and 4+ valence state; and wherein the metal oxide is selected from lanthanide oxide and / or zirconium oxide. The present disclosure also provides a method of fabricating a metal oxide particle and use thereof.

Provided is a charge-transporting composition that contains: a charge-transporting substance comprising a polythiophene derivative represented by formula (1); a fluorine-based surfactant; metal oxide nanoparticles; and a solvent.(R1 and R2 are each independently a hydrogen atom, an alkoxy group having 1-40 carbon atoms, —O—[Z—O]p—Re, a sulfonic acid group, or the like, or R1 and R2 bond to each other to form —O—Y—O—. Y is an alkylene group having 1-40 carbon atoms, which may contain an ether bond and which may be substituted with a sulfonic acid group. Z is an alkylene group having 1-40 carbon atoms, which may be substituted with a halogen atom. p is 1 or more, and Re is a hydrogen atom, an alkyl group having a 1-40 carbon atoms, or the like.)

The present application is directed to a catalyst comprising a layer of metal oxide nanoparticles; and a mesoporous silica-containing shell surrounding the layer of metal oxide nanoparticles, wherein the mesoporous silica-containing shell has an outer surface and an inner surface inside the outer surface, the outer surface having openings leading to pores extending through said mesoporous silica-containing shell to the inner surface, wherein the metal oxide is selected from a group consisting of zirconium oxide, hafnium oxide, titanium oxide, niobium oxide, cerium oxide, molybdenum oxide, scandium oxide, yttrium oxide, and lanthanum oxide. The present application is also directed to a method of making such catalyst and a method for catalytically hydrogenolyzing a polymer with the catalyst into solvent, naphtha, diesel, kerosine, base oil, or wax-like products.

The invention is applicable to the technical field of biomedical materials, and provides injectable composite hydrogel as well as a preparation method and application thereof. According to the invention, groups such as catechol are introduced into a hydrogel skeleton to form hydrogen bonds with amino groups and hydroxyl groups on the tissue surface, so that the hydrogel is ensured to be tightly adhered to a wound part to protect the wound from being influenced by complex microenvironments such as gastric acid. Meanwhile, metal ions and a nano material are introduced, so that the mechanical strength, deformation resistance and degradation rate of the hydrogel are enhanced, and the hydrogel can better adapt to a complex gastrointestinal tract environment. Besides, the composite hydrogel constructed by the invention can slowly release substances with special biological activity, such as metal ions with Fenton-like reaction activity and metal or metal oxide nanoparticles with superoxide dismutase-like and catalase-like activities, in wound parts and nearby microenvironments; through synergistic catalytic degradation of local excessive hydrogen peroxide, inflammatory response is relieved, antibacterial activity is enhanced, and healing of gastrointestinal tract postoperative wounds is effectively promoted.

The invention relates to the technical field of solar cells, in particular to a perovskite solar cell. The invention provides a perovskite solar cell. The perovskite solar cell comprises a conductive substrate, a hole transport layer, a perovskite layer, an electron transport layer and an electrode layer which are stacked in sequence, the electron transport layer is made of inorganic metal oxide nanoparticles; the electron transport layer is prepared by a solution method; an interface buffer layer is arranged between the perovskite layer and the electron transport layer, and the material of the interface buffer layer is a first organic material; and / or the material of the electron transport layer further comprises a second organic material; the first organic material and the second organic material independently comprise an organic polymer and / or an organic small molecule material. According to the perovskite solar cell, the electron transport layer can be prepared by a solution method, and the performance requirement can be met.

A method of treating cancer cells includes exposing the cancer cells to a ZrO2 / CaSiO3 / g-C3N4 nanocomposite material. The ZrO2 / CaSiO3 / g-C3N4 nanocomposite material comprises spherical metal oxide nanoparticles comprising a ZrO2 phase and a CaSiO3 phase dispersed on a matrix of g-C3N4 nanosheets, wherein the spherical metal oxide nanoparticles have an average particle diameter in a range from 3 to 18 nm, and wherein the ZrO2 / CaSiO3 / g-C3N4 nanocomposite material has a percent inhibition for human breast carcinoma (MCF-7) cells greater than or equal to 80% inhibition in an in-vitro cellular viability assay.

The invention discloses a method for modifying metal oxide through siloxane and application of the method, and belongs to the field of display. The method comprises the following steps: S1, dissolving a precursor of a metal oxide in a solvent, dropwise adding an alcoholic solution of alkali, stirring for reaction, and cleaning and drying a product to obtain metal oxide nanoparticles; s2, dissolving the metal oxide nanoparticles in water and / or alcohol to obtain a turbid liquid; and S3, adding a siloxane compound into the turbid liquid, and carrying out ultrasonic treatment, standing, filtering, cleaning and drying to obtain the siloxane-modified metal oxide nanoparticles. The modification method is simple, the performance is remarkably improved, the limitation of the traditional technology on the aspects of solution colloid stability and interface performance is broken through, and reliable technical guarantee is provided for preparation and application of novel photoelectric devices.

A light-emitting element includes: a first electrode; a second electrode; a light-emitting layer provided between the first electrode and the second electrode; and a charge transport layer provided between the first electrode and the light-emitting layer, wherein the charge transport layer includes a metal oxide nanoparticle, an organic ligand is chemically bonded to the metal oxide nanoparticle via a surface hydroxyl group of the metal oxide nanoparticle, a bond enthalpy at 298 K between bonding atoms at a bonding site between the organic ligand and the surface hydroxyl group is 326.7 kJ / mol or more, and the organic ligand includes a phosphonic acid.