77 results about "Nanostructured composites" patented technology

A nanostructured composite material comprising semiconductor nanocrystals in a crystalline semiconductor matrix. Suitable nanocrystals include silicon, germanium, and silicon-germanium alloys, and lead salts such as PbS, PbSe, and PbTe. Suitable crystalline semiconductor matrix materials include Si and silicon-germanium alloys. A process for making the nanostructured composite materials. Devices comprising nanostructured composite materials.

The invention belongs to the new field of chemical engineering, and particularly relates to a nano material with clay as a carrier and perovskite type compound nano particles as active components and a preparation method and application thereof to the field of optical coupling-SCR denitration. Lanthanum nitrate, nickel nitrate, ferric nitrate, citric acid and the clay are added to deionized water to be stirred, then the mixture is transferred into a water bath kettle to evaporate to obtain wet gel, and the nano material can be obtained through drying, calcining and drying. The composite is adopted as a catalyst for photocatalytic denitration, and compared with traditional SCR denitration, the amount of adopted NH3 is reduced, and the conversion efficiency on NO at low temperature is improved.

The present invention is directed to a composition useful for making homogeneously mineralized self assembled peptide-amphiphile nanofibers and nanofiber gels. The composition is generally a solution comprised of a positively or negatively charged peptide-amphiphile and a like signed ion from the mineral. Mixing this solution with a second solution containing a dissolved counter-ion of the mineral and/or a second oppositely charged peptide amphiphile, results in the rapid self assembly of the peptide-amphiphiles into a nanofiber gel and templated mineralization of the ions. Templated mineralization of the initially dissolved mineral cations and anions in the mixture occurs with preferential orientation of the mineral crystals along the fiber surfaces within the nanofiber gel. One advantage of the present invention is that it results in homogenous growth of the mineral throughout the nanofiber gel. Another advantage of the present invention is that the nanofiber gel formation and mineralization reactions occur in a single mixing step and under substantially neutral or physiological pH conditions. These homogeneous nanostructured composite materials are useful for medical applications especially the regeneration of damaged bone in mammals. This invention is directed to the synthesis of peptide-amphiphiles with more than one amphiphilic moment and to supramolecular compositions comprised of such multi-dimensional peptide-amphiphiles. Supramolecular compositions can be formed by self assembly of multi-dimensional peptide-amphiphiles by mixing them with a solution comprising a monovalent cation.

A block copolymer, preferably a block copolymer such as poly(isoprene-block-ethylene oxide), PI-b-PEO, is used as a structure directing agent for a polymer derived ceramic (PDC) precursor, preferably a silazane, most preferably a silazane commercially known as Ceraset. The PDC precursor is preferably polymerized after mixing with the block copolymer to form a nanostructured composite material. Through further heating steps, the nanostructured composite material can be transformed into a nanostructured non-oxide ceramic material, preferably a high temperature SiCN or SiC material.

Collections of composite particles comprise inorganic particles and another composition, such as a polymer and/or a coating composition. In some embodiments, the composite particles have small average particle sizes, such as no more than about 10 microns or no more than about 2.5 microns. The composite particles can have selected particle architectures. The inorganic particles can have compositions selected for particular properties. The composite particles can be effective for printing applications, for the formation of optical coatings, and other desirable applications.

Compositions comprising a highly dispersed mixture of nanostructures and polymeric materials in a solvent or suspension medium, composites made therefrom having enhanced mechanical, thermal and electronic properties, and methods for making such composites are provided.

The present invention is related to a nano-structured composite material and process of making for air detoxing and deodoring in enclosed spaces to prevent harmful chemicals in the air from damaging human health. The nano-structured composite material consists of nano-porous carbon, zeolites with sub nano-size pores and at least 1 other component chosen from nano-porous rare earth oxides and nano-sized catalysts, and is made into highly efficient configurations with high geometric surface and low resistance air flow channels. The synergetic action of those nano-structured components can effectively remove toxic chemicals including, but not limited to formaldehyde, benzene, toluene, xylene, propene, butadiene, acetone, carbon monoxide, nitric oxide, nitrogen dioxide, sulfur dioxide, hydrogen sulfide, ammonia, alcohols, chlorine, mercaptans, as well as bad odors, such cigarette smoke and bathroom/toilet smells.

A nanostructured composite anode with nano gas channel and an atmosphere plasma spray manufacturing method thereof are disclosed. The anode consists of a porous base material and a composite film with nano gas channels above the porous base material while the composite film has a plurality of nano gas pores and a plurality of nano gas channels. The manufacturing method according to the present invention includes the steps of: provide micron-sized agglomerated and nanostructured powders having mixture of nano oxide particles and a binder; heat the micron-sized agglomerated and nanostructured powders into melt or semi-melt oxide mixture; spray the melt or semi-melt oxide mixture on a porous base material; and generate the nanostructured anode composite film with nano gas channels through hydrogen reduction. The anode of the present invention increases the electrochemical activity and slows down nickel particle aggregation effect under high temperature environment.

The invention belongs to the field of the energy and chemical industry and particularly relates to a preparation method of a nanometer material using clay as a carrier and using a perovskite type compound as an active component and application of the nanometer material in photocatalytic degradation of antibiotics.Lanthanum nitrate, ferric nitrate, cerous nitrate, citric acid and the clay are added to deionized water and are mixed, then the mixture is transferred to a water bath kettle for evaporation to obtain wet gel, and drying, calcinations and dry grinding are performed to obtain the lanthanum ferrite/clay nano-structure composite material.The antibiotics are subjected to the photocatalytic degradation by adopting the composite material and can be rapidly degraded under visible light by utilizing the high catalytic activity of (cerium doped) lanthanum ferrite.The clay carrier facilitates antibiotic molecular adsorption in the antibiotic degradation process, the antibiotics are in contact with the lanthanum ferrite after being absorbed to the catalyst surface, and antibiotic molecules are decomposed under visible light irradiation to produce other active species.

The invention relates to a preparation process of a multiple TiO2 nanotube/PbS/CuS nanocomposite used for quantum dot sensitized solar cells. The multiple TiO2 nanotube/PbS/CuS nanocomposite is prepared mainly by combining a chemical bath method and a hydrothermal method. The method comprises the following steps: shearing and grinding a titanium plate and carrying out ultrasonic cleaning and decontamination in acetone or anhydrous ethanol solution; flushing the cleaned titanium plate with deionized water, and air-drying; placing cleaned titanium plate in the well prepared electrolyte for carrying out electrochemical anodizing; and placing anodized sample of the semi-wall type titanium dioxide nanotube array in the hydrogen peroxide solution for soaking for certain time, and sequentially compounding nanoparticles of PbS/CuS with titanium oxide nanotube by adopting chemical bath method and the hydrothermal method. The method is simple in process, the prepared multi-nano structure is novel, and the conversion efficiency of the solar cell prepared through the structure is improved greatly, thus being beneficial to improvement of performances of quantum dot sensitized solar cells.

The invention relates to composite polyurethane foam. The composite polyurethane foam contains a carbon nanostructured compound, the carbon nanostructured compound contains carbon and 0.5-4wt% of first non-carbon non-oxygen substances, the first non-carbon non-oxygen substances comprise one or at least two of a simple substance and compounds of a first non-carbon non-oxygen element, the first non-carbon non-oxygen element is selected from P, Si, Ca, Al and Na, and a peak height ratio of a carbon peak G to peak D in a Raman spectrum of the carbon nanostructured compound is 1-20. Through use of the specific carbon nanostructured compound, a simple mixing process of the specific carbon nanostructured compound and polyether polyol is realized, and then the mixture and polyisocyanate undergo a polymerization reaction so that polyurethane is compounded. The preparation method is free of a carbon nanostructured compound formation process, has simple processes and can realize seamless connection with the existing equipment.

A photocatalytic coating composition and method of coating articles, the composition containing solvents for rapid evaporation at room temperature, polyalkylphenylsiloxane, xylene, nano densified hydrophilic fumed silica, nanostructured composite photocatalyst powder and nano inorganic anti-bacteria powder. The coating may be applied by conventional coating methods to organic or inorganic structured surfaces where photocatalytic activity is desired, such as in a forced air-circulating environment. Once applied, the coating quickly dries to leave an adherent, flexible, durable, and long-lasting photocatalytic coating having a large surface area and exhibiting high surface activity against pathogens and pollutants such as bacteria, viruses, mold, fungi, and volatile organic compounds.

The invention belongs to the field of novel chemical materials and especially relates to a lanthanum cobaltate/attapulgite/reduced graphene oxide nano-structure composite material, a preparation method, and an application thereof. The preparation method includes the steps of: 1) preparing lanthanum cobaltate/attapulgite through a sol-gel process, adding the lanthanum cobaltate/attapulgite to deionized water and acidifying the liquid and regulating pH value to obtain a lanthanum cobaltate/attapulgite water solution carrying positive charges; 2) reducing graphite oxide with hydrazine hydrate to produce reduced graphene oxide carrying negative charges, and mixing the reduced graphene oxide with the lanthanum cobaltate/attapulgite water solution, stirring the mixture in water bath, performing a reaction, and drying a reaction product to obtain a perovskite/attapulgite/reduced graphene oxide composite material. With the composite material as a catalyst for performing photo-SCR denitration, conversion rate on NOx in a low-temperature zone (100-200 DEG C) can reach more than 95%.

The invention provides nanostructure composite porous silicon and carbon materials, and also provides carbon nanofiber arrays having a photonic response in the form of films or particles. Composite materials or carbon nanofiber arrays of the invention are produced by a templating method of the invention, and the resultant nanomaterials have a predetermined photonic response determined by the pattern in the porous silicon template, which is determined by etching conditions for forming the porous silicon. Example nanostructures include rugate filters, single layer structures and double layer structures. In a preferred method of the invention, a carbon precursor is introduced into the pores of a porous silicon film. Carbon is then formed from the carbon precursor. In a preferred method of the invention, liquid carbon-containing polymer precursor is introduced into the pores of an porous silicon film The precursor is thermally polymerized to form a carbon-containing polymer in the pores of the porous silicon film, which is then thermally carbonized to produce the nano structured composite material. A carbon nanofiber array is obtained by dissolving the porous silicon. A carbon nanofiber array can be maintained as a film in liquid, and particles can be formed by drying the material.