74 results about "Mesoporous titania" patented technology

A visible light activatable mesoporous titanium dioxide photocatalyst having a surface area of from 100 m2 / g to 400 m2 / g. The photocatalyst may have a rate of decomposition greater than 0.005 min−1. The photocatalyst may have a band gap width less than 2.95 eV. The photocatalyst may comprise undoped titanium dioxide or doped titanium dioxide. A hydrothermal process for synthesising a photocatalyst is also described.

The present invention relates to one low temperature preparation process of nanometer mesoporous titania with high photocatalytic activity, and the preparation process has reaction temperature lower than 100deg.c and can prepare nanometer mesoporous titania with superfine crystal grain size, great specific surface area and controllable crystal phase. The preparation process includes the following steps: dissolving titanate in absolute ethyl alcohol to obtain solution A, dissolving three block copolymer in alcohol and adding acid to obtain solution B, and dropping the solution B into the solution A under stirring to obtain solution C; stilling solution C to cure, air drying to obtain gel and grinding to obtain powder; setting the powder into alcohol solution of acid, heating, stirring and refluxing, extracting template agent P123 while converting titania from amorphous form into crystalline form; and centrifuging, washing and drying the precipitate.

The invention discloses a preparation method of ordered mesoporous titania / silver photocatalyst, relating to a preparation method of titania / silver and aiming to solve the technical problems of small specific surface area, poor orderliness and low photocatalytic activity of mesoporous titania / silver photocatalyst prepared by prior arts. The preparation method comprises the steps of silver solution preparation, titanium precursor preparation, titania / silver gel preparation, and heat treatment. The inventive photocatalyst has specific surface area of 120-160 m<2> / g, has the advantages of uniform mesopores and high catalytic activity; can be applied to photocatalysis field, and water treatment field of lake, ocean, municipal sewage and industrial sewage.

The no-template process of preparing gradated macroporous / mesoporous titania photocatalyst includes dropping butyl titanate into distilled water without stirring, ageing for 24 hr, separating out the precipitate, repeated washing with distilled water, drying at normal temperature and normal pressure for 24 hr, and final high temperature calcining to obtain gradated macroporous / mesoporous titania photocatalyst. Thus prepared macroporous / mesoporous titania photocatalyst is superior to that obtained through a traditional template process, and has high heat stability and high photocatalytic activity. The process features simple operation, low temperature, no template and additive, solvent of water, environment friendship, etc.

A method of making a copper oxide-titanium dioxide nanocatalyst for performing the catalytic oxidation of carbon monoxide is provided. The copper oxide-titanium dioxide nanocatalyst is in the form of copper oxide (CuO) nanoparticles supported on mesoporous titanium dioxide (TiO2) nanotubes. The copper oxide-titanium dioxide nanocatalyst is prepared by adding an aqueous solution of Cu(NO3)23H2O to an aqueous suspension of titanium dioxide nanotubes. Deposition precipitation at constant alkaline pH is used to form the copper oxide nanoparticles supported on mesoporous titanium dioxide nanotubes. Aqueous sodium carbonate is used to adjust the pH. The solid matter (copper oxide deposited on titanium dioxide nanotubes) is separated from the suspension, washed, dried and calcined, yielding the copper oxide-titanium dioxide nanocatalyst. Carbon monoxide may then flow over a fixed-bed reactor loaded with the copper oxide-titanium dioxide nanocatalyst at a temperature between 80° C. and 200° C.

A structure includes a substantially non-conductive frame having an exterior surface. The structure defines a plurality of passages that open to the exterior surface. Mesoporous material is disposed in the plurality of passages and is supported therein by the frame. In a method for making a mesoporous nanocrystalline titania hybrid material, a templating agent, an acid, and a titania precursor is mixed into a template liquid. A frame that defines a plurality of passages is placed into the template liquid. A solvent is evaporated from the template liquid, thereby forming a titania gel encapsulating the templating agent. The gel is heated to remove substantially the templating agent from the non-conductive frame and the titania, thereby leaving a mesoporous titania material.

The invention discloses a preparation method of carbon fiber-loaded mesoporous titania, and belongs to a carbon fiber surface modification technology. An activated carbon fiber is adopted as a load body, and the mesoporous titania is loaded on the surface of the carbon fiber by sol-gel reaction by virtue of a guiding role of a template. The method has the advantages that titania-modified carbon fiber which has a mesoporous structure, is controllable in load capacity, and uniform in distribution, and has a phase in an anatase structure can be prepared, and high specific surface area of the mesoporous material is beneficial to improvement of interface bonding between a carbon fiber reinforcement and a base material. Thus, the mechanical property of the carbon fiber composite material is improved further. Meanwhile, the preparation method has important significance in expansion of application of the carbon fiber in the structure-energy storage integrated multifunctional composite material. The preparation method can be applied to the technical fields such as an advanced composite material, energy storage, absorption and the like.

The invention provides a preparation method of a monoatomic catalyst by taking mesoporous titania as a carrier. The preparation method comprises the following steps: dissolving polyethylene oxide-polypropylene oxide-polyethylene oxide triblock copolymer (P123) into an ethanol solution, after dissolution is ended, respectively adding a certain amount of concentrated sulfuric acid and concentrated hydrochloric acid, stirring at room temperature for a certain time, then adding isopropyl titanate, stirring for a certain time, then adding chloropalladic acid, and preparing a precursor of Pd@TiO2 bySolvent volatilization induced self-assembly technique; drying the precursor, then putting into a muffle furnace, heating to a certain temperature in a program heating way, and keeping the temperature for a period of time; after roasting is ended, reducing at a certain temperature by using an H2 / N2 gas mixture, thus obtaining a palladium monoatomic catalyst with uniform particles. The monoatomiccatalyst prepared by the preparation method has the advantages that the process is simple, metal atoms are dispersed uniformly on the carrier, the repeatability is good, the range of suitable acids iswide, a product is a nanoparticle in a hexagonal prism or sphere shape, therefore the pore size distribution is uniform, the catalytic performance is excellent, and mass production can be realized.

The present invention relates to an photoelectrode and the preparation method thereof, wherein said photoelectrode comprises a substrate and a titania layer composed of a mesoporous titania bead having a diameter of 200-1000 nm, specific surface area of 50-100 m2 / g, porosity of 40-60%, pore radius of 5-20 nm, pore volume of 0.20-0.30 cm3 / g, and the titania comprised in the bead is anatase titania.

The invention belongs to the technical field of advanced porous materials, and particularly relates to mesoporous P25 titanium dioxide microspheres and a preparation method thereof. By a solvent evaporation-induced self-assembly method, a commercial amphiphilic triblock copolymer PEO-PPO-PEO is used as a templating agent, organic titanium is used as a titanium source, inorganic acid is used as a titanium dioxide skeleton crystal modifier, a rutile-anatase coexistent skeleton with uniform spherical morphology and divergent mesoporous channels is formed during solvent evaporation, and after the templating agent is removed by roasting, the mesoporous P25 titanium dioxide microspheres are obtained. The mesoporous P25 titanium dioxide microspheres have a large specific surface area and large pore volume; in the skeleton, rutile and anatase are closely packed and the ratio is adjustable, so that the separation efficiency of photogenerated charges and photogenerated holes of a material is significantly improved, and thus the photoelectric conversion efficiency and the efficiency of a reaction for producing hydrogen through photocatalytic water decomposition are greatly improved. The preparation method is simple, a wet preparation process is adopted, raw materials are easy to obtain, and the preparation method is suitable for large-scale production and has a wide application prospect in the fields of environment, energy resources and catalysis and many other fields.

A mesoporous metal oxide materials with a chiral organization; and a method for producing it, in the method a polymerizable metal oxide precursor is condensed inside the pores of chiral nematic mesoporous silica by the so-called “hard templating” method. As a specific example, mesoporous titanium dioxide is formed inside of a chiral nematic silica film templated by nanocrystalline cellulose (NCC). After removing the silica template such as by dissolving the silica in concentrated aqueous base, the resulting product is a mesoporous titania with a high surface area. These mesoporous metal oxide materials with high surface area and chiral nematic structures that lead to photonic properties may be useful for photonic applications as well as enantioselective catalysis, photocatalysis, photovoltaics, UV filters, batteries, and sensors.

The invention provides a preparation method and applications of a lithium battery material with high rate performance. The method comprises the steps of: providing titania as a titanium precursor; mixing uniformly the titania as the titanium precursor, an pore-forming agent and water to form an aqueous slurry with a solid content of 10-40 wt%, wherein the pore-forming agent accounts for 10-50 wt% of all solid content, and then spray-drying the obtained mixture to form spherical particles; performing heat treatment to obtain spherical mesoporous titania powder; and in accordance with the atomic ratio of lithium and titanium in lithium titanate, a ratio of a lithium precursor with an excess amount of 1-8 wt%, and theoretical carbon content of 0-5 wt%, weighing the obtained titania powder, the lithium precursor, a carbon precursor and a proper amount of water, stirring and performing heat treatment to the uniformly stirred aqueous slurry in a protective atmosphere or in the air. According to the preparation method of the present invention, the close contact between small particles inside the spherical particles is enhanced, thereby increasing the conductivity, reducing the mass transfer resistance, and improving the high-rate performance.

The present invention relates to an N-phosphorylated peptide enrichment method. According to the method, O-phosphorylated peptide interference in a peptide sample is removed through beta-elimination, and the N-phosphorylated modified peptide in the sample is enriched by using a magnetic mesoporous titania composite nanometer material; the O-phosphorylated modification on serine and threonine is removed through a beta-elimination method under an alkaline condition so as to form stable dehydroalanine and beta-methyl dehydroalanine; a magnetic Fe3O4 nanometer material is synthesized through a solvent method, titanium dioxide is wrapped on the surface through a sol-gel method, and hole amplification is performed through a hydrothermal method to obtain the magnetic mesoporous titania composite nanometer material; and the magnetic mesoporous titania composite nanometer material can specifically enrich the N-phosphorylated peptide under a weak acid buffer system. According to the present invention, the beta-elimination and specific enrichment combined method is used for enriching the N-phosphorylated peptide in the sample.

The invention discloses a preparation method of a rare earth luminescence mesoporous titania hybrid material. The preparation method mainly comprises the following steps: firstly, synthesizing an ordered mesoporous titania material and modifying the mesoporous titania through 2,2'-dipyridyl-4,4'-dicarboxylic acid; then enabling the modified ordered mesoporous titania and synthesized binary rare earth complexes to carry out reflux reaction for hours in ethyl alcohol and obtain a solid product; and washing and drying to prepare a rare earth luminescence mesoporous titania hybrid material. Through the preparation method of the rare earth luminescence mesoporous titania hybrid material, the rare earth complexes are grafted to an ordered mesoporous titania matrix through a covalent bond; the prepared rare earth luminescence mesoporous titania hybrid material is capable of obtaining visual and near-infrared light emission under visible light excitation; and the rare earth luminescence mesoporous titania hybrid material shows potential application prospects in solar cells and biological materials.

The invention discloses a digital printing method. The digital printing method comprises the steps of fabric pretreatment, drying, physical adsorption agent spraying, drying before printing, inkjet printing, drying after printing, steaming, washing and drying. Based on the principle that a porous surface is formed on fabric by adopting calcium carbonate or mesoporous silica or mesoporous titania as a physical adsorption agent, and bleeding phenomena can be reduced, the physical adsorption agent is sprayed in advance according to printing patterns, a closed layer is formed in an interface between an area needing to be printed and an unprinted area of the fabric to stop dye ink from bleeding towards the unprinted area.

The present invention relates to a mesoporous titania bead and the preparation method thereof, wherein said mesoporous titania bead has a diameter of 200-1000 nm, specific surface area of 50-100 m2 / g, porosity of 40-60%, pore radius of 5-20 nm, pore volume of 0.20-0.30 cm3 / g, and the titania comprised in the bead is anatase titania.

The invention discloses an anti-bleeding digital printing method, which comprises the following steps: fabric pretreatment; drying; local spraying of a physical adsorbent on the fabric; drying; overall spraying of the physical adsorbent on the fabric; drying before printing; inkjet printing; drying after printing; steaming; washing; and drying. According to the principle that the bleeding phenomenon can be reduced by forming a porous surface on the fabric with calcium carbonate or mesoporous silica or mesoporous titania as a physical absorbent, a calcium carbonate powder solution is sprayed according to the printing pattern; the overall fabric is coated with the physical adsorbent; the physical adsorbents which are different in solubility are formed on a printed region and a non-printed region of the fabric, so that the adsorption capacity of the printed region to dye ink is relatively high; and the dye ink can be relatively well prevented from bleeding towards the non-printed region.

The invention discloses an anti-tumor drug-resistant mesoporous titania nano pharmaceutical composition and a preparation method thereof and belongs to the field of pharmaceutical preparations. According to the mesoporous titania nano pharmaceutical composition, aminated mesoporous titania serves as a carrier, cyclic pentapeptide-hyaluronic acid ADH-1-HA serves as a targeting material, and adriamycin serves as a model drug. The preparation method comprises the following steps: taking sodium hyaluronate, 1-ethyl-(3-dimethylaminopropyl) carbodiimide hydrochloride EDC, N-hydroxy succinimide NHS and cyclic pentapeptide-ADH-1 as raw materials, and synthesizing an anti-tumor drug-resistant targeting material cyclic pentapeptide-hyaluronic acid ADH-1-HA; synthesizing amino-modified mesoporous titania nano particles; finally, adding the EDC and the NHS into the ADH-1-HA solution, adding the mesoporous titania nano particles, and reacting, thereby obtaining the product. The method disclosed bythe invention is reasonable in design and simple in preparation process, is capable of improving an effect of killing drug-resistant tumors, and has wide application prospects.

The invention discloses a preparation method and application of an ordered mesoporous titania-nanometer gold composite material. The preparation method comprises dissolving a triblock copolymer, a water-soluble phenolic resin, tetrabutyl titanate and concentrated hydrochloric acid in ethanol according to a certain proportion, inducing a self-assembling process through solvent evaporation, and carrying out two high temperature treatment processes to obtain the lavender ordered mesoporous titania-nanometer gold composite material. The ordered mesoporous titania-nanometer gold composite material has visible light response, a large specific surface area and even channels and has a wide application prospect in the field of photocatalytic carbon dioxide reduction.

The invention belongs to the technical field of inorganic compounds and particularly discloses a mesoporous titania-silica oxide composite material. The mesoporous titania-silica oxide composite material has the pore size of 9.2nm to 10.6nm and the specific surface area of 350m<2> / g to 460m<2> / g, and an anatase crystal phase in titania species accounts for 93.2% to 99.5% the total titania species.The invention further discloses a preparation method for the mesoporous titania-silica oxide composite material and an application of the mesoporous titania-silica oxide composite material in catalysis of NO removal under visible light with the wavelength greater than 420nm. The mesoporous titania-silica oxide composite material has relatively high photocatalytic activity.

The invention discloses an SCR denitration catalyst and a preparation method thereof.The catalyst has a layer structure of serpentine, mesoporous titania and a nickel and vanadium composite oxide, wherein the mass ratio of serpentine to mesoporous titania to nickel and vanadium composite oxide is (25-45):(30-70):(0.5-2.0), the nickel and vanadium composite oxide is an active component Ni2V2O7, serpentine is in the form of particles, the outer layer of the serpentine particles is wrapped with a mesoporous TiO2 coating, and the surface of the coating is coated with the active component Ni2V2O7 to form an active layer of the composite oxide.Due to the fact that other materials which are low in price and easy to obtain are adopted to completely or partially replace TiO2, the preparation cost of the catalyst can be reduced, and the mechanical strength and corrosion resistance of the catalyst can be improved; meanwhile, other metallic oxides are adopted to be reacted with vanadium to form the composite oxide, and the possibility that sublimation occurs under the high-temperature condition is reduced.

The present invention relates to a solar cell comprising an anode, a cathode, and an electrolyte, wherein said anode comprises a substrate and a titania layer composed of a mesoporous titania bead having a diameter of 200-1000 nm, specific surface area of 50-100 m2 / g, porosity of 40-60%, pore radius of 5-20 nm, pore volume of 0.20-0.30 cm3 / g, and the titania comprised in the bead is anatase titania.

The invention discloses a doped perovskite thin film solar cell and a preparation method thereof. The doped perovskite type thin film solar cell includes a transparent conductive substrate, and an electron transport layer, a mesoporous titania layer, a perovskite light absorption layer, a hole transport layer and an electrode which are laminated in this order on the surface of the transparent conductive substrate. The material of the perovskite light absorber layer is halogen-doped tin perovskite, and the halogen is mainly Br and I. The preparation method comprises the steps of sequentially forming an electron transport layer, a mesoporous titania layer, a tin perovskite layer, a hole transport layer and an electrode on the surface of a transparent conductive substrate. The doped perovskite type thin film solar cell has no environmental pollution, strong light absorption ability and photoelectric conversion efficiency. The preparation method is simple and easy to operate and high in production efficiency, so as to reduce the production cost.

The invention discloses a preparation method of a human milk fat substitute. The method includes the following steps of 1, reaction, wherein palm stearin and vegetable oil are mixed and molten to obtain mixed oil, oleic acid or nonglyceride oleate or palmitic acid or nonglyceride palmitate is added and stirred to be mixed, and lipase immobilized on a mesoporous titania nanocomposite is added to catalyze transesterification; 2, extraction, wherein after transesterification is finished, the catalyst in the reaction mixture is removed through centrifugation, deacidification is carried out with the molecular distillation method to make the acid value of the end product not larger than 3.0 mg KOH g-1, and extract is obtained and used in the next step of processing; 3, mixing, wherein the extract obtained in the second step is mixed with one or more of sunflower seed oil, high-oleic-acid sunflower seed oil, rapeseed oil and linseed oil in the mass ratio of 1:(4-1), and the human milk fat substitute is obtained. The process is simple and controllable, and the similarity between the product and human milk fat can be easily improved.

The invention provides a coating composition suitable for use in forming a coating that can reduce the concentration of pollutant gases in the environment, the coating composition comprising polymericmaterial together with mesoporous titania particles. The particles have a continuous exterior convex surface and a particle diameter of greater than or equal to 1[mu]m but less than or equal to 50[mu]m, and a BET specific surface area of from 30m2 / g to 350m2 / g, and a modal pore diameter of greater than or equal to 5nm but less than or equal to 50nm, and a pore size distribution such that 85% or more of the total pore volume is associated with pores with a diameter of 10 [mu]m or less. The coating composition comprises from 0.01% to 10% by volume of said particles, relative to the total volumeof the coating composition and comprises from 5% to 99.99% by volume of polymeric material, relative to the total volume of the coating composition.A coating formed from said composition can be usedfor the removal of pollutant gases, especially in conditions where the coating is exposed to UV radiation from sunlight.

The present invention discloses one kind of mesoporous titania material containing selenium and its preparation process. The mesoporous titania material containing selenium as new photocatalytic material is prepared with sodium selenite as the precursor of selenium, butyl titanate as the precursor of titanium and non-ionic surfactant block polymer P123 as template agent, and through the low temperature in-situ one-step reaction in a sol-gel system to implant selenium into mesoporous titania bulk phase and the subsequent ageing and drying of the product. The mesoporous titania material includes inorganic oxide skeleton Ti-O-Ti and Ti-O-Se, and has Se / Ti molar ratio of 0-10 % and characteristic molecular expression of (TiO2)1-x(SeO2)x, where, x is 0-0.1. The preparation process is simple and environment friendly, and the synthesized mesoporous titania material has controllable selenium content, great specific surface area and wide application.

The invention discloses a method for preparing a mesoporous Ag2O / TiO2 composite material. The method is characterized in that by using the unique characteristics of greater pore diameter, specific area and pore volume of a mesoporous material, inorganic metal particles with catalytic degradation efficiency, such as Ti and Ag, are doped into the hole wall of the mesoporous material by a proper method and are subjected to certain post treatment to obtain the mesoporous composite material. A synthesized product is characterized by using a wide-angle X-ray diffraction pattern, an N2 low temperature adsorption-desorption curve and a transmission electron microscopy (TEM), and further a structure and properties of the mesoporous material under different reaction conditions are researched. The synthesized mesoporous composite material is used for adsorption, catalysis and photodegradation experiments of pollutants, in particular to macromolecular pollutants in sewage and harmless treatment ofthe pollutants is realized. The result shows that Ag atom-doped mesoporous titania well retains the stability of a mesoporous structure; the pore diameter of the mesoporous composite material reaches4.5nm; in addition, the mesoporous composite material has a good photodegradation effect on methyl hesperidin.

The invention discloses a process for preparing mesoporous titania / zinc oxide composite films. The process comprises that in organic solvent, a block polymer template is utilized to induce the precursor solution of titanium and the precursor of zinc to hydrolyze to form an organic-inorganic uniform ordered meso-structure, and then the template is removed and the film is crystallized, thereby obtaining a mesoporous composite film of which the framework is nanocrystal. The process for preparing mesoporous titania / zinc oxide composite films has the advantages that the process for preparing mesoporous titania / zinc oxide composite films is simple in technique, and relatively low in cost, can easily control the components of composite films, and can adjust the content of TiO2 and ZnO in the mesoporous film by controlling the addition amount of the precursor of titanium and zinc.

A semiconductor-absorber composite comprises a mesoporous titania particle, halogen atoms disposed on a surface of the mesoporous titania particle, and photoactive perovskite in physical contact withat least a portion of the surface of the mesoporous titania particle.