40 results about "Nano tio2" patented technology

The invention discloses a preparation method of a copper-palladium alloy loaded nano titanium dioxide semiconductor material as a catalyst for a carbon dioxide reduction reaction. Firstly, alloy nanoparticles are generated through a sol-gel method, the morphology of the nanoparticles is controlled and agglomeration is prevented through oleylamine and oleic acid, and borane-tert-butylamine is added at the temperature of 170 DEG C to regulate and control the sizes of the generated alloy nanoparticles. A series of characterizations prove that the catalyst has a very good particle loading condition, uniform particle distribution and increased reaction active sites, and shows excellent activity when being applied to a carbon dioxide reduction reaction, when the loading capacities of copper and palladium are respectively 1%, the activity of the obtained catalyst is the highest, the methane generation rate can reach 20.23 mol / g / h, and the methane generation rate can reach 20.23 mol / g / h. The selectivity of methane reaches 100%.

The application relates to the technical field of magnesium-carbon bricks, in particular to a preparation process of a high-thermal-shock-resistance magnesium-carbon brick, which comprises the following steps: mixing electric smelting magnesia, modified graphite, phenolic resin and aluminum powder, performing compression molding, and performing high-temperature solidification to prepare the magnesium-carbon brick. In the low-temperature stage, ammonium bicarbonate is decomposed to form pores, and in the high-temperature stage, nano ZrO2 is phase changed to actively clamp and heal the micro cracks caused by expansion, and B2O3 liquid phase is passively filled to form double protection. The nano TiO2 and MgO on the surface of the modified graphite capture impurities in the graphite. Meanwhile, LDH is decomposed to generate MgAl2O4 spinel, and the graphite and the magnesia matrix are connected in a chemical bond mode. The nano-phase alkaline environment of MgO reduces the oxidation activation energy of B4C, accelerates the oxidation of B4C into B2O3, and the liquid phase characteristics of the generated B2O3 enable it to spontaneously penetrate into pores under the driving of capillary force. Moreover, the B2O3 liquid phase reacts with nano ZrO2 at high temperature to form boron-zirconium composite oxides.

The application discloses a kind of catalysts for flue gas purification and its production process, belong to denitration catalyst technical field.The catalysts for flue gas purification, including by outer to inside sequentially coated manganese shell, carrier and iron core;The manganese shell, carrier and iron core;Preparation method includes the following steps: butyl titanate is dispersed in anhydrous ethanol, add urea and tourmaline, after filtration precipitation deionized water washing dry, obtain tourmaline modified nano TiO2;Tourmaline modified nano TiO2 is immersed in iron precursor solution, rotary evaporation is calcined to obtain intermediate;Intermediate is immersed in manganese precursor solution, add KMnO4 stationary reaction, suction filtration wash dry obtained catalyst is a three-layer coated core-shell structure, with high denitration activity and excellent sulfur poisoning resistance at low temperature (100-200 DEG C).

The application provides a preparation method of pentaerythritol phosphate, which uses pentaerythritol and phosphoric acid as reaction raw materials, and esterifies under the action of a polar aprotic solvent and a nano TiO2 / WO3 composite material to generate pentaerythritol phosphate. The purity of the pentaerythritol phosphate is greater than or equal to 99.0%, the yield is greater than or equal to 95%, the nano TiO2 / WO3 composite material is easy to recover, and the nano TiO2 / WO3 composite material can be reused more than three times. The preparation method in the application has mild reaction conditions, low energy consumption, and the solvent can be partially recovered, is green and environment-friendly, has high product purity, and does not need a complex purification step.

The application discloses an inorganic copolymer anticorrosive paint and a preparation method thereof, and relates to the technical field of paints. The inorganic copolymer anticorrosive paint comprises the following raw materials in parts by weight: 20-30 parts of silica sol, 8-15 parts of sodium hydroxide, 30-45 parts of metakaolin, 8-20 parts of quartz sand, 15-25 parts of water, 0.3-2 parts of sodium polyacrylate, 0.2-3 parts of polydimethylsiloxane emulsion, 5-12 parts of modified nanometer titanium dioxide, 6-10 parts of modified epoxy resin, 10-25 parts of hydroxyethyl methacrylate, 5-10 parts of zinc phosphate, 3-8 parts of aluminum tripolyphosphate and 2-6 parts of red iron oxide. The inorganic copolymer anticorrosive paint has scientific raw material proportioning, and the anticorrosive performance is enhanced through the modified nanometer titanium dioxide and the epoxy resin. In the preparation, step-by-step feeding and ultrasonic dispersion are adopted to ensure that the materials are uniform, and vacuum degassing and nitrogen protection are adopted to improve the stability. The silica sol, the zinc phosphate and other components have a synergistic effect, a dense coating is formed, the anticorrosive performance is high, the construction performance is good, and the inorganic copolymer anticorrosive paint is suitable for various scenes.

This invention discloses a method for preparing a thermally stable multilayer battery separator, relating to the field of battery materials technology. The battery separator of this invention comprises a modified polyethylene film and a coating applied to at least one surface of the modified polyethylene film. The modified polyethylene film is obtained by mixing polyethylene, poly-2,6-dimethyl-1,4-phenyl ether, and maleic anhydride-grafted polyethylene in a mass ratio of 5-7:2-3:1-2, extruding the mixture into a film, and then subjecting it to corona treatment. The coating is obtained by mixing modified nano-titanium dioxide containing ester groups, a solution of 3-(3-(aminomethyl)phenyl)-2,2-difluoropropionitrile, and ethanol in a mass ratio of 1-3:5-8:1-3, adding a small amount of catalyst to obtain a coating solution, and then coating and drying the mixture, significantly improving the thermal stability of the battery separator.

This utility model discloses an insulating tape for lithium battery cells. The utility model includes: a multi-layer composite insulating tape with an indicator label at its outermost end. The multi-layer composite insulating tape comprises, from bottom to top, a release layer, a functional adhesive layer, a composite substrate layer, and a protective coating. The indicator label is adhered to the bottom surface of the release layer. The release layer is a biaxially oriented polypropylene film coated with silicone. The functional adhesive layer is composed of a high-temperature resistant pressure-sensitive adhesive and a phase change thermally conductive adhesive. The composite substrate layer is composed of a polyimide film and a polyurethane sponge layer. The protective coating is a nano-titanium dioxide-fluorocarbon resin composite coating. This multi-layer composite insulating tape, composed of the release layer, functional adhesive layer, composite substrate layer, and protective coating, can adapt to complex environments such as high temperature and high humidity. It also exhibits good flexibility, is less prone to bubbles and wrinkles, and has good chemical corrosion resistance and aging resistance.

The application discloses a kind of composite oxygen electrode materials and preparation method thereof, preparation method includes the following steps: S1, using tetrabutyl titanate to prepare precursor solution;S2, precursor solution is impregnated to oxygen electrode skeleton;S3, to the oxygen electrode skeleton after impregnation is carried out drying treatment;S4, in the atmosphere containing water vapor, to the oxygen electrode skeleton after drying is carried out heat treatment, makes tetrabutyl titanate in situ hydrolysis, forms nano TiO2 catalytic layer on oxygen electrode skeleton, obtains composite oxygen electrode material.The preparation method of the application replaces the repeated impregnation-high temperature sintering cycle in traditional process with one-step hydrolysis reaction, so as to simplify process, reduce cost while uniformly constructing high-activity nano TiO2 catalytic layer on oxygen electrode skeleton, and then obtain high-activity, high-stability composite oxygen electrode material.

The present application provides a reversible photochromic paper bowl and its preparation method and application, the reversible photochromic paper bowl includes paper bowl base material, isolation layer, photochromic layer and protective layer arranged in turn; the isolation layer includes a combination of polyvinyl alcohol and cationic guar gum; the photochromic layer includes a combination of a first aqueous polymer matrix and photochromic microcapsules; the protective layer includes a combination of a second aqueous polymer matrix and nanometer titanium dioxide. Through the design of the isolation layer, the photochromic layer, the protective layer and their joint action, the reversible photochromic paper bowl has light response color changing characteristics, and the response speed is fast, and the color changing performance is reversible. At the same time, the reversible photochromic paper bowl has uniform and stable color development and color change effect, excellent ultraviolet aging resistance, high modulus, strength and rigidity, excellent mechanical properties, acoustic properties, sensitivity and sound quality effect, and its preparation method is simple, which can meet the diversified performance requirements in various scenes.

The application provides an epoxy fireproof coating for nuclear power, a preparation method and application thereof, and relates to the field of fireproof coatings. The fireproof coating comprises the following components in parts by weight: 30-42 parts of DOPO modified epoxy resin, 20-23 parts of CTBN toughened epoxy resin, 5-8 parts of nano TiO2, 4-7 parts of montmorillonite, 6-7 parts of B4C microspheres, 6-9 parts of ammonium polyphosphate, 3-5 parts of melamine, 3-4 parts of pentaerythritol, 3-4 parts of active diluent, 0.5-1 part of dispersant, 0.3-0.5 part of defoaming agent and 8-12 parts of curing agent. The DOPO epoxy and B4C microspheres are used to synergistically shield gamma rays and neutrons, and the ammonium polyphosphate is used to form a high-efficiency fireproof carbon layer, so that the performance conflict in the prior art is solved, the key equipment protection of nuclear power stations is suitable, and the dual requirements of fireproofing and radiation resistance are met.

This invention discloses a photocatalytic functionalized nylon fabric and its preparation method. The method includes the following steps: (1) mixing carbon quantum dots with nano-titanium dioxide to prepare photocatalytic nanomaterials, and mixing the photocatalytic nanomaterials with a composite emulsion to obtain a composite photocatalytic sizing solution; (2) applying the composite photocatalytic sizing solution to nylon yarn by padding or single-yarn sizing, and drying and curing to obtain nylon sizing yarn with a composite photocatalytic sizing film; (3) weaving the nylon sizing yarn to obtain nylon fabric with a composite photocatalytic sizing film; (4) desizing the nylon fabric, washing and drying it to obtain nylon fabric loaded with a photocatalytic film layer; (5) plasma treating the nylon fabric to form dispersed hydrophilic and hydrophobic regions on the surface of the nylon fabric to obtain the finished product of photocatalytic functionalized nylon fabric. The nylon fabric of this invention has excellent VOC gas degradation efficiency and antibacterial rate.

This invention discloses an antibacterial and antistatic cellulose blended yarn. The raw materials for preparing the blended yarn include natural fibers, deodorizing hemp pulp fibers, antistatic carbon fibers, mineral-modified fibers, and an antistatic agent. The raw materials, by weight, include the following components: 20-30 parts natural fibers, 10-12 parts deodorizing hemp pulp fibers, 10-20 parts antistatic carbon fibers, and 6-8 parts mineral-modified fibers. The natural fibers include bamboo fibers, cotton fibers, and hemp fibers, and possess inherent antibacterial components. The mineral-modified fiber raw materials are nano-zinc oxide and nano-titanium dioxide particles. The advantages of this invention compared to existing technologies are: the antibacterial and antistatic cellulose blended yarn of this invention has a soft and smooth hand feel and improved weaving performance; it retains the unique antibacterial and moisture-wicking functions of hemp fibers, while inheriting the comfortable and skin-friendly characteristics of cotton and viscose regenerated cellulose fibers; and it improves the antistatic performance of the blended yarn.

The application relates to the technical field of fabrics, and discloses a moisture-absorbing, sweat-releasing and antibacterial titanium fiber fabric and a preparation method thereof. The 2,4-bis(N,N-dihydroxyethylamino)-6-[N-(3-aminopropyl)methyl acrylamide]-1,3,5-homotriazine is used to graft modify the polyamide fiber fabric, the hydrophilic amide bond, imino and a large number of hydroxyl groups are grafted to the fabric surface, the hydrophilicity and the moisture regain of the fabric are significantly improved, and the moisture-absorbing and sweat-releasing performance of the fabric is improved. Meanwhile, the limiting oxygen index and the flame-retardant performance are improved. A large number of hydroxyl groups on the surface of the polyamide fabric can interact with the hydroxyl groups on the surface of the titanium dioxide precursor generated by hydrolysis of tetrabutyl titanate, the generated nanometer titanium dioxide can be uniformly loaded on the fabric surface, more photocatalytic antibacterial sites are exposed, and the antibacterial performance of the fabric is significantly improved.

The application provides a preparation method of an agricultural nanometer friction power generation electrode interface modification material, and belongs to the technical field of nanometer material preparation, and comprises the following steps: step 1, preparation of a nanometer titanium dioxide sol; step 2, preparation of a polypyrrole / titanium dioxide composite sol; step 3, pretreatment of an agricultural-grade red copper foil electrode; step 4, spraying and coating of the composite sol; and step 5, solidification and shaping to form a nanometer modification layer. The modification material prepared by the application can effectively inhibit solid-liquid interface polarization after coating, significantly improve the charge storage and transmission efficiency of the electrode, and optimize the output performance of a power generation device. The modification layer prepared by the application has strong adhesion with the copper foil, is resistant to high temperature and high humidity in agricultural environments, does not fall off or corrode, improves the electrode adaptability and service life, and guarantees stable power generation output. The application adopts a sol-gel method for preparation, discards traditional complex modification processes, has a simple process, raw materials are easy to obtain, and the cost is low, and is suitable for large-scale production and agricultural practical application.

The utility model discloses a triclosan preparation device relates to triclosan production technical field, including first reactor, the inlet of first reactor is respectively through pipeline intercommunication with 2,4 - dichlorophenol jar, sodium hydroxide solution jar, xylene jar I and tetrabutyl ammonium bromide jar, the outlet of first reactor is through pipeline intercommunication with second reactor, the inlet of second reactor is respectively through pipeline intercommunication with 2 - chloro - 5 - nitrobenzene methyl ether jar, dilute hydrochloric acid solution jar, ZnCl2 - Al2O3 solid acid jar, nano TiO2 jar and xylene jar II, the outlet of second reactor is through pipeline intercommunication with third reactor, the inlet of third reactor is through pipeline intercommunication with acetic acid jar, the top gas phase export of third reactor is through pipeline intercommunication with first condenser, and the outlet of first condenser is through pipeline intercommunication with crude product jar, improves the yield of product.

This invention discloses an aerogel thermal insulation coating and its preparation method. The thermal insulation coating comprises: chloroprene modified acrylate emulsion, water-based epoxy emulsion, aerogel paste, hollow vitrified microsphere paste, graphene, aluminum phosphate, flame retardant, nano-titanium dioxide, antioxidant, additives, and water. This aerogel thermal insulation coating is a single-component, room-temperature reaction-cured coating. The cured coating has many advantages, including low thermal conductivity, good high-temperature resistance, high bonding strength, good flame retardancy, energy saving, and environmental friendliness. The product is mainly used for thermal insulation of pipelines, reaction vessels, storage tanks, and other equipment in municipal, petrochemical, and grain and oil storage industries. It can also be used for wall insulation and insulation of irregularly shaped structures. The application method is spraying or rolling.

The application discloses a kind of composite adsorption materials for water environment purification treatment and preparation method thereof, belong to water treatment functional material technical field.The composite adsorption material uses discarded cow hair as matrix, and the surface of matrix is formed by dopamine self-polymerization and co-deposition with metal composite powder to form polydopamine / metal composite powder coating, and polyallyl glycidyl ether is grafted on the coating by surface-initiated atom transfer radical polymerization, and finally, L-arginine or 2,4-diamino butyric acid is used for ring-opening modification.The metal composite powder is mixed by nano TiO2, nano ZrO2 and nano CeO2 in a specific ratio.The material is modified by zwitterion to give pH responsiveness, and can selectively adsorb anionic or cationic dyes under different pH conditions, and after adsorption saturation, the dyes can be eluted and recovered with dilute acid or dilute alkali, and photocatalytic regeneration can be realized by sunlight irradiation.

The present application provides a kind of solid waste-based asphalt composite modifier and its preparation method, by mass fraction, including the following raw material components: surface composite modified ceramic polishing brick powder 40~70 parts;Zeolite imidazolate skeleton powder 3~8 parts;Alkali-activated geopolymer porous powder 15~25 parts;Nano TiO2 / ZSM-5 composite photocatalyst 2~6 parts;Silane coupling agent modified graphene 0.5~2 parts.The present application uses ceramic polishing brick powder, alkali-activated geopolymer porous powder and zeolite imidazolate skeleton material as main component, introduces nano TiO2 / ZSM-5 composite photocatalyst as catalytic active center.The modifier can still maintain a certain purification capacity in weak light environment, so as to realize the sustained purification of asphalt flue gas pollutants.

This application relates to the field of self-healing coating materials, mainly to a highly stable microcapsule and its emulsification process. The highly stable microcapsule comprises: 1-5 parts nano-titanium dioxide, 0.1-1 parts oleic acid, 0.5-2 parts polyhydroxystearic acid, 45-55 parts hexadecane, 30-40 parts water, 1-5 parts active material, 0.01-1 parts silane coupling agent, alcohol solvent, 1-5 parts Span, and 0.5-2 parts polyethylene glycol. The emulsification process includes: modifying nano-titanium dioxide with polyethylene glycol and silane coupling agent to obtain PEG-modified TiO2; mixing hexadecane, PEG-modified TiO2, polyhydroxystearic acid, and Span to obtain oil phase A; mixing oil phase A and oleic acid to obtain oil phase B; mixing water and active material to obtain an aqueous phase; adding the aqueous phase to oil phase B and emulsifying to obtain emulsion A; and freeze-drying emulsion A to obtain the highly stable microcapsule. This application can improve the self-healing effect of microcapsules in coatings.

The application provides a regeneration liquid and a regeneration method of corrugated plate denitration catalyst, and relates to the technical field of catalyst regeneration. The regeneration liquid comprises a three-stage cleaning liquid and an activity supplementing liquid; the three-stage cleaning liquid comprises an alkali cleaning liquid, an acid cleaning liquid and an oxidation liquid; and the activity supplementing liquid comprises vanadium salt, tungsten salt and nano TiO2 sol. The regeneration liquid can restore the denitration efficiency of the failed catalyst to more than 91% of that of a new catalyst. The high efficiency is derived from a strategy of "first deep cleaning, then double-effect recovery". The combination of the thorough cleaning and the synchronous regeneration of "chemical activity + physical structure" is the key to achieving the high-efficiency regeneration effect.

This utility model relates to the field of catering products technology and discloses a titanium enamel antibacterial cookware, including a tableware body. The tableware body has a titanium alloy base layer inside, and a sintered titanium enamel layer is provided on the inner surface of the titanium alloy base layer. Antibacterial particles are uniformly dispersed on the inner side of the sintered titanium enamel layer, and an outer ceramic layer is provided on the outer side of the titanium alloy base layer. The titanium alloy base layer provides a high-strength support skeleton, and the sintered titanium enamel layer on its surface forms a dense protective barrier. The antibacterial particles (nano-titanium dioxide and silver particles) embedded in this layer constitute the core antibacterial mechanism. When the tableware is exposed to natural light or artificial light, the antibacterial particles trigger a photocatalytic reaction, continuously releasing reactive oxygen free radicals and silver ions, directly destroying bacterial cell membranes and blocking DNA replication, achieving an ultra-high broad-spectrum antibacterial rate. This design breaks through the limitation of traditional coatings being easily worn off. The Mohs hardness of the sintered titanium enamel layer ensures that the antibacterial particles are firmly encapsulated. Even with long-term wear and tear, the inner particles can still slowly release antibacterial factors.

This invention relates to the field of synergistic treatment of industrial flue gas dust and multiple pollutants, specifically to platinum-based ceramic filter catalysts, their preparation methods, and applications. A platinum-based ceramic filter catalyst is characterized by comprising: a ceramic filter substrate; and a catalytic coating located on at least a portion of the surface of the ceramic filter substrate. The raw material for the catalytic coating includes a platinum-based catalytic slurry, comprising nano-titanium dioxide, soluble Pt salt, sol, dispersant, and water. By combining the catalytic slurry with the ceramic filter substrate, a reaction interface integrating dust removal and CO / VOC oxidation is constructed, avoiding the poisoning of downstream catalysts by dust in traditional processes, thus improving catalyst stability and reducing pressure drop. Simultaneously, it provides sufficient residence time and contact area for the catalytic reaction, significantly improving catalytic efficiency.

This invention relates to a nano-sized Ti3O5, its preparation method, and its application in the preparation of an acidic oxygen evolution electrocatalyst, belonging to the field of nanomaterial preparation and electrocatalysis technology. The invention utilizes a controllable solid-phase reaction between nano-titanium dioxide and nano-titanium powder to prepare uniform nano-sized Ti3O5. Then, using the nano-sized Ti3O5 as a support, an Ir / Ru bimetallic active component is loaded via an ethylene glycol-assisted stepwise liquid-phase reduction method to prepare an acidic oxygen evolution electrocatalyst. The nano-sized Ti3O5 is monoclinic with a space group of C2 / m and a particle size of 200-300 nm. The nano-sized Ti3O5 exhibits high electrical conductivity (>25 S cm⁻¹). ‑1 With a wide acidic electrochemical stability window (-0.55 V to 2.05 V), it is suitable as a conductive and corrosion-resistant support for acidic oxygen evolution electrocatalysts, thereby enabling the preparation of acidic oxygen evolution electrocatalysts supported on noble metals, especially on Ir / Ru bimetals.

A sizing agent based on rigid-flexible combined nanoparticles, a preparation method thereof and application thereof in CF / PEEK composite materials.The present application belongs to the field of fiber sizing agent and its preparation.The purpose of the present application is to solve the technical problem that the interface of CF / PEEK and the overall mechanical properties of the composite material need to be further optimized.The present application proposes a sizing agent composed of hybrid nanoparticles combined by flexible ANF and rigid nano TiO2 and a PEI transition layer.The active functional group content, surface roughness and wettability of the CF / PEEK composite material modified by the sizing agent are significantly improved.At the same time, the synergistic effect of the rigid-flexible structure at the interface finally improves the external stress transfer, inhibits the crack propagation, and improves the interface bonding strength and overall mechanical properties of the composite material to meet the needs of the automotive, ship and aerospace fields.