2550 results about "Nanocrystalline titanium dioxide" patented technology

The invention relates to a fluorosilicone material for a super-hydrophobic coating and its preparation method and use method. The fluorosilicone material is prepared from fluorinated nano-silica and / or nano-titanium dioxide sol having two particle sizes. The fluorinated nano-silica or nano-titanium dioxide sol having the small particle size has the average particle size of 10 to 150nm. The fluorinated nano-silica or nano-titanium dioxide sol having the large particle size has the average particle size of 200 to 500nm. Through utilization of fluorine-containing siloxane in silica and / or titanium dioxide preparation, surface energy of the fluorosilicone material as a coating is effectively reduced. Through utilization of non-fluorinated dichlorodialkylsilane, coating surface hydrophily is partly reduced and a fluorine-containing silane use amount and a cost are reduced.

The invention discloses nano titanium dioxide / acrylate composite emulsion and a preparation method thereof. The method comprises the following steps of: hydrolyzing butyl titanate to generate nano titanium dioxide sol in absolute ethanol by using hydrochloric acid as a catalyst, adding a vinyl-containing silane coupling agent for modifying the sol, performing centrifugal washing, drying and grinding on the obtained product to obtain nano titanium dioxide, and thus obtaining the nano titanium dioxide / acrylate composite emulsion by using acrylate monomers of methyl methacrylate, butyl acrylate and the like as reaction monomers and adopting a method combining in-situ emulsion polymerization and seed emulsion polymerization. The nano titanium dioxide / acrylate composite emulsion prepared by the method has good storage stability and is stable in a polymerization reaction process; and a film formed by the composite emulsion has good hardness, impact strength and heat resistance.

The invention relates to permeable bricks inlaid with nanometer titanium dioxide and a preparation method thereof and belongs to the field of building materials. According to the preparation method provided by the invention, titanium dioxide precursor turbid liquid is evenly sprayed into holes of permeable brick base bodies, and then the permeable brick base bodies are dried and calcined for 10-30 min so as to obtain the permeable bricks inlaid with nanometer titanium dioxide and anatase type nanometer titanium dioxide is uniformly inlaid in the holes of the obtained permeable bricks. The permeable bricks can effectively degrade contaminants in water seepage passing though the permeable bricks and some organic contaminants attached to the surfaces of brick bodies in a manner of photochemical catalysis and also can degrade a part of gaseous pollutants in air in a manner of photochemical catalysis.

The invention discloses a multifunctional concrete structure endurance protective agent as well as the preparation and application method thereof. The protective agent provided by the invention contains the following ingredients of: an organic / inorganic composite fluorosilicone-acrylate copolymer, lithium silicate, sodium silicate, lithium molybdate, sodium tetraborate, sal glauberi, 1,2-aminoazophenylene, nanometer titanium dioxide, anhydrous ethanol and water. The protective agent can penetrate inside concrete, wherein a densification ingredient can minimize internal holes and cracks to raise the compactness of concrete, and a rust-resistant ingredient can penetrate into concrete and be adsorbed on the surface of steel bar so as to passivate and protect the steel bar; the low-surface energy silicon fluoride ingredient can be solidified to form a cured film on the surface of concrete so as to endow the protective agent with the hydrophobic performance; a nanometer ingredient can endow the cured film layer with properties of resisting ultraviolet and ageing and improving the organic polymer performance as well as the self-cleaning performance. In addition, hydroxy generated from the hydrolysis of siloxane group can perform a condensation reaction with hydroxy on the surface of concrete to produce chemical bond, so as to raise the anchoring strength between the film and concrete and improve the interface combination. The protective agent provided by the invention can be widely applied in various concrete structure engineering protections to raise the service life of concrete.

This invention relates to methods of making single phase nanocrystalline titanium dioxide. It is hereby provided a method for preparing single-phase anatase type titanium dioxide photocatalyst having a particle size of nano level at near room temperatures without the need for a sintering process at high temperatures.

The invention relates to the energy storage field and discloses MOS2 (molybdenum disulfide) and TiO2 (titanium dioxide) nanocomposites and a production method thereof. The MOS2 and TiO2 nanocomposites are composite materials of nano molybdenum disulfide and titanium dioxide, namely the MOS2 and TiO2. The MOS2 and TiO2 nanocomposites are obtained through the two-step hydrothermal method which comprises, to be specific, growing titanium dioxide nanorods on a seed layer through the auxiliary hydrothermal method and coating a layer of molybdenum disulfide on the outer layer of the titanium dioxide nanorods through the direct hydrothermal method. According to the obtained MOS2 and TiO2 nanocomposites through production, the energy can be effectively stored and a good method is provided for the existing energy storage problem due to the high specific surface area of the titanium dioxide one-dimensional nanorods and the excellent super capacitance performance of the molybdenum disulfide. According to the production method, the energy consumption is low, the condition is simple, the large-scale production is easy and the like.

The invention relates to a nano titanium dioxide fluorine-carbon coating in the technical field of nono, and a preparation method thereof. The coating comprises the following compositions by weight percentage: 2 to 6 percent of nano titanium dioxide, 80 to 90 percent of fluorine-carbon base material, 5 to 10 percent of curing agent and 2 to 10 percent of coating thinner. The preparation method comprises the following steps: 1, according to weight percentage, 2 to 6 percent of nano titanium dioxide particle is weighed and added into the 2 to 10 percent of coating thinner so as to be evenly mixed through ultrasonic dispersion; and 2, the mixture is added with the 80 to 90 percent of fluorine-carbon base material and the 5 to 10 percent of curing agent orderly and is evenly stirred to be made into coating mother solution. In addition, the nano titanium dioxide is rutile-type nano titanium dioxide particle modified by silane coupling agent KH-570. The nano titanium dioxide fluorine-carbon coating can effectively improve the dispersing performance of nano particle in the coating and the UV aging resistance of the coating.

The present invention relates to an antibacterial and antiviral non-woven fabric, a preparation method of the fabric and a mask containing the fabric. The antibacterial and antiviral non-woven fabriccontains nano-silver, and also contains an inorganic antibacterial agent and / or an organic antibacterial agent; the inorganic antibacterial agent comprises any one or combination of at least two of nano titanium dioxide, nano zinc oxide, bismuth tungstate and nano silicon dioxide; and the organic antibacterial agent comprises chitosan and / or quaternary ammonium salt. The mask sequentially comprises a first fabric layer, the antibacterial and antiviral non-woven fabric and a second fabric layer from inside to outside. While the air permeability is not affected, the mask is endowed with the long-acting antibacterial, anti-haze and antiepidemic antiviral properties, has the catalytic degradation function for harmful gases such as formaldehyde and benzene in air, and can be repeatedly washed with water to be recycled, thereby greatly reducing the use cost of the protective mask.

The invention discloses high-pollution-resistant high weatherproof water-based external wall emulsion paint and a preparation method thereof. The external wall emulsion paint comprises hydrophilic self-crosslinking acrylic emulsion, titanium dioxide, non-transparent polymer, precipitated silica, attapulgite, talcum powder, rutile type nano titanium dioxide, auxiliaries, water and other components. The invention aims at overcoming the defects in the prior art and providing external wall paint with high weather resistance and stain resistance and relatively low production cost; and the invention also aims at providing a method for preparing the external wall paint.

The invention discloses nano titanium dioxide composite material applicable to wastewater treatment. The nano titanium dioxide composite material comprises nano titanium dioxide, absorptive porous material and nano titanium dioxide-modified material, wherein the nano titanium dioxide-modified material comprises inert metal Ag, Au and Pt or / and transition metal ions Cr, Mn, Fe, Co, Ni and Cu or / and rare earth metal ions La3+, Y3+ and Eu3+ or / and Fe-Sn and Fe-La. The nano titanium dioxide composite material has the advantages that the composite material is composited by the nano titanium dioxide-modified material, the nano titanium dioxide and the absorptive porous material, the photocatalytic activity and light utilization rate of the nano titanium dioxide are increased, the utilization rate of the nano titanium dioxide is increased, and the composite material can evidently decompose pollutants in wastewater.

The invention provides a grading three-dimensional porous graphene / titanium dioxide photocatalyst and preparation method thereof. The photocatalyst is composed by a three-dimensional grapheme framework and nano titanium dioxide particles; the grahene is provided with a macroporous structure; titanium dioxide is mesoporous titanium dioxide; the macropores and the mesopores are communicated; the nano titanium dioxide particles are scattered on a grapheme nano sheet; the surfaces of nano titanium dioxide microspheres are wrapped with graphene nano sheets; the macropores of the graphene are filled with the nano titanium dioxide microspheres. The photocatalyst with a three-dimensional structure can not only prevent the graphene sheet layers from stacking, but also scatter titanium dioxide particles excellently, and is high in specific surface area; besides, samples can be used for photocatalysis degradation of methylene blue, and the methylene blue can be fully degraded in 25 minutes. The preparation method provides a new thought for preparation of the photocatalyst, and has a potential application value in the fields of energy sources and environment.

The invention discloses a preparation method of graphene loaded with anatase type nano titanium dioxide and an application thereof. The preparation method comprises the following steps: preparing graphite oxide from crystalline flake graphite; carrying out reduction reaction on the graphite oxide to obtain graphene by taking hydrazine hydrate as a reducing agent and sodium dodecyl benzene sulfonate as a dispersing agent; preparing titanium hydroxide colloidal solution by taking tetrabutyl titanate as a titanium source; mixing the ethanol solution of graphene and the titanium hydroxide colloidal solution, stirring and calcining to prepare the graphene loaded with anatase type nano titanium dioxide. The graphene loaded with anatase type nano titanium dioxide prepared by the method can be mixed with copper powder to prepare the negative electrode of a nickel-hydride secondary battery. The method provided by the invention has the advantages of simple preparation process and low cost and is easy to operate. When the prepared graphene loaded with anatase type nano titanium dioxide is used as the active material of the cathode of the secondary battery, the effects of high discharge specific capacity and good circulation stability are achieved.

The invention discloses a cellulose acetate / nano titanium dioxide mixed media hollow fiber positive osmotic membrane. 0.05-4.0% (w / w) of nano titanium dioxide and 0.01-1.0% (w / w) of oxidized graphene are added into a solution composed of N-methyl-pyrrolidone or dimethylacetamide or dimethylformamide and 1,4-dioxane, 3.0-21.0% (w / w) of additives is added, uniform stirring is carried out for 5-60min, then 15.0-40.0% (w / w) of cellulose acetate is added, full stirring is carried out at a temperature of 20-70 DEG C, the mixture is allowed to stand, and a hollow fiber positive osmotic membrane is obtained through spinning. The osmotic membrane employs 1M of NaCl as a drive liquid and deionized water as a raw material liquid, the water flux is 16.5L / m2h, the reverse salt flux is less than 3.5g / m2h, and the contact angle is 60.2 degrees in test time of 1h.

The invention relates to an adsorbent for adsorbing dye in water, and its preparation, application and regeneration methods. The adsorbent provided by the invention is prepared by in situ composition of polypyrrole and titanium dioxide. The mass ratio of titanium dioxide to polypyrrole in the composite adsorbent is 1: 0.05-50. The preparation method comprises the following steps of: using an organic or inorganic titanium source as a raw material, and adopting a sol-gel method at the temperature of 0-100 DEG C to prepare a titanium dioxide sol; Mixing the obtained titanium dioxide sol with a pyrrole monomer at the temperature of minus 20-80 DEG C, realizing in situ composite by the chemical oxidation process, filtering and drying to obtain the polypyrrole nanometer titanium dioxide composite adsorbent. By the adoption of the adsorbent, dye in high-density dye wastewater can be effectively adsorbed. The preparation method is simple, and has short process and mild reaction condition; theaddition quantity of the prepared adsorbent during the dye wastewater treatment process is little; the adsorption balance time is short; the adsorbent can be repeatedly regenerated and used for a long time; and the regenerated adsorbent still has high adsorption performance.

The invention relates to the field of functional fabrics, in particular to an antibacterial fabric, a preparation technology of the antibacterial fabric and textile of the antibacterial fabric. The antibacterial fabric comprises, by weight, 10-20 parts of short fiber silk, 20-25 parts of anion polypropylene staple fibers, 15-25 parts of nano bamboo carbon fiber, 2-5 parts of nano-titanium dioxide, 5-10 parts of nano-silver fiber, 2-4 parts of anti-mite finishing agent, 3-8 parts of sweat-absorbent quick-drying processing agent, 12-18 parts of binder, 2-4 parts of dispersing agent, 3-5 parts of fabric softener and 80-85 parts of polyester cotton fiber. Due to the fact that the anion polypropylene staple fibers are added, effects of nerve stability, sleep improvement, inflammation diminishing and pain relief are provided. Due to the fact that the anti-mite finishing agent is added, trouble caused by mites to a human body can be effectively prevented. Due to the fact that the sweat-absorbent quick-drying processing agent is added, sweat generated by the body can be rapidly absorbed, discomfort can be reduced, and breeding of germs under a humid environment can be prevented. The antibacterial fabric can be applied to clothing, home textiles, sports goods, medical care, bacteria resistance and insect prevention textiles.

The invention belongs to the field of water repellent finishing and processing of fabric, and particularly relates to freon-free super hydrophobic UV resistant cotton fabric and a method for preparing the same. The freon-free super hydrophobic UV resistant cotton fabric is prepared by padding a fabric with nanometer titanium dioxide sol and processing the fabric by using a long-chain freon-free alkyl compound. The titanium dioxide content of the titanium dioxide sol is 0.2 to 5.0 weight percent, and the number of long-chain carbon atoms of the long-chain freon-free alkyl compounds is 6 to 18. The contact angle between the prepared cotton fabric and water drops is over 150 degrees, so that the cotton fabric has a super hydrophobic property; and the UV resistant factor of the prepared cotton fabric is over 50+, so that the cotton fabric has high UV resistance.

The invention discloses a composite antibiotic finishing agent which comprises an organic antibacterial active component, an inorganic antibacterial active component, a penetrating agent, an adhesive, a softening agent, a suspending agent and the balance of water, wherein a non-dissolution type polymer antibacterial agent is selected as the organic antibacterial active component, and silver-loaded nanometer titanium dioxide is selected as the inorganic antibacterial active component. The invention also discloses a method for preparing the composite antibiotic finishing agent and a process used for finishing a mucilage glue and cotton fiber interweaved jacquard fabric. The main material of the composite antibiotic finishing agent for textiles is formed by the organic antibacterial active component and the inorganic antibacterial active component, thus the composite antibiotic finishing agent has a high-efficiency inhibiting capacity of more than 20 kinds of harmful bacteria such as escherichia coli, staphylococcus aureus, gonococcus and the like; the bacteria inhibiting rate is higher than 99 percent; the repelling and preventing rate of dust mites, gamasid mites and chigger is higher than 99 percent; the repelling and preventing rate of dust mites, gamasid mites and chigger is higher than 95 percent, and the killing rate is higher than 90 percent after the mucilage glue and cotton fiber interweaved jacquard fabric is washed for 50 times; and the gonococcus, escherichia coli, staphylococcus aureus and the like do not grow on the fabric which is not washed for 30 times, 50 times or 100 times, and the bacteria inhibiting rate is higher than 99 percent.

The invention provides waterproof air-permeable antibacterial anti-ultraviolet reinforced coating adhesive for textile and a preparation method of the waterproof air-permeable antibacterial anti-ultraviolet reinforced coating adhesive. The adhesive is prepared by mixing the following raw materials in parts by weight: 65-68 parts of a water-based polyurethane waterproof permeable adhesive, 10-15 parts of polyethylene glycol having the average molecular weight of 600, 2-3.5 parts of a TDI tripolymer curing agent, 3-4 parts of anionic amino silicon oil emulsion, 5-7 parts of an anionic or non-ionic fluorine-containing waterproof agent, 5-7 parts of a phenylamide anionic antibacterial deodorant agent, 1.5-2.5 parts nano-zinc oxide powder and 1-2 parts of nano-titanium dioxide powder. The coating adhesive is simple and convenient to produce and convenient to use, has good waterproof color fastness, and is suitable for 10D-20D polyester, chinlon cloth fabric functional coatings.

The invention provides a manufacturing method of a nano modified melt-blown nonwoven fabric material. The manufacturing method includes steps: modifying nano titanium dioxide and nano silicon dioxide; mixing modified nano titanium dioxide and nano silicon dioxide with polypropylene chips to obtain a polypropylene melt-blown nonwoven fabric; subjecting the nonwoven fabric to electret treatment through a corona electret process. The nano titanium dioxide and the nano silicon dioxide are modified and then mixed with the polypropylene chips, manufactured products are high in strength and great in mechanical property without subsequent finishing, and defects of insufficient strength of existing melt-blown nonwoven fabrics and poor breathability and thickness of composite nonwoven materials are overcome. In addition, the nano modified melt-blown nonwoven fabric material has antibacterial, deodorization and formaldehyde removal functions and the like.

The method for determining chemical oxygen demand (COD) of water body by using nano titanium dioxide powder includes the following steps: 1. preparing reaction liquor; 2. potocatalysis and degradation; 3. measuring absorbancy A; and 4. solving COD value.

An electronic device housing is provided. The electronic device housing includes a substrate, a metallic-appearing coating formed on the substrate, and a top coating formed on the metallic-appearing coating. The top coating contains nano-titanium dioxide powder and fluorocarbon resin. The electronic device housing has self-cleaning and anti-fingerprint properties.

The invention discloses a preparation method of double-self-cleaning fabric. The method comprises steps as follows: 1, modified nano titanium dioxide is added to water; 2, the fabric is irradiated for treatment; 3, the fabric treated in the step 2 is soaked in a modified nano titanium dioxide water solution prepared in the step 1 and then taken out to be dried, and the self-cleaning fabric is obtained. The preparation method adopts a simple process, the cost is low, and industrial production is easily realized. The fabric prepared with the method has double self-cleaning effects including a photocatalytic self-cleaning effect and super-hydrophobic self-cleaning effect and has lasting photocatalytic activity.

The invention discloses a cerium-doped nano titanium dioxide / activated carbon fiber composite photocatalyst for air purification and a preparation method thereof. The preparation method comprises the following steps: doping cerium nitrate into nano titanium dioxide to obtain the cerium-doped nano titanium dioxide suspension, putting proper amount of activated carbon fiber into the suspension, soaking for 20-60 minutes under ultrasonic conditions, taking out, airing, and keeping the temperature at 200-220 DEG C for 2-4 hours, thereby obtaining the cerium-doped nano titanium dioxide / activated carbon fiber composite photocatalyst for air purification. Compared with the prior art, the rare-earth cerium is doped into the nano titanium dioxide, thereby prolonging the service life of photovoltaic electron-hole pairs, enhancing the quantum effect of the nano titanium dioxide, and further enhancing the photocatalytic activity of the nano titanium dioxide; and the whole method is simple and easy to control; and the product prepared by the method has high degradation efficiency for volatile organic pollutants, especially formaldehyde gas, reaching more than 90%.

The invention relates to an electrode of a quantum dot-sensitized solar cell and the preparation method, octadecene, tributyl phosphate and selenium powder are mixed to prepare a selenium precursor; oleic acid, octadecene and cadmium oxide power are mixed to prepare a cadmium precursor; the nano titanium dioxide powder is dispersed in an octadecene solution of titanium dioxide which is prepared in the octadecene, the octadecene solution of the titanium dioxide is washed and dried in the mixed solution of cadmium precursor and selenium precursor so as to obtain a quantum dot-sensitized titanium dioxide nanocrystal; the quantum dot-sensitized titanium dioxide powder and a non-ionic surfactant are mixed and ground to prepare a paste, the paste is evenly coated on a transparent conductive substrate to form a thin film, and finally sintering is carried out. As the quantum dots are directly in-situ synthesized at the surface of titanium dioxide, the quantum dots are closely combined with the titanium dioxide particles, thus the invention is beneficial to the improvement of the stability of the cell and the photoelectric conversion efficiency; furthermore, the quantum dots which are generated under an oily system have very high crystallinity and luminous efficiency, thus the invention is beneficial to the further improvement of the efficiency of the solar cell.

The invention belongs to the nano composite preparation field and relates to a nano titanium dioxide / graphene composite material and a preparation method thereof. The method includes the following steps that: positively charged titanium dioxide sol and negatively charged graphene oxide sol are mixed together so as to form floc sediments; and sodium borohydride hydrothermal reduction is carried out, so that the nano titanium dioxide / graphene composite material can be obtained. The nano titanium dioxide / graphene composite material has large specific surface area and high electrochemical performance; the nano titanium dioxide / graphene composite material can be used as the electrode material of a super capacitor, so that the electrode material can have high specific capacity and high cyclic stability; the nano titanium dioxide / graphene composite material can be also used as the anode material of a lithium ion battery, so that the anode material can have high stability and little possibility of decay; selected preparation materials are safe, nontoxic, environmentally friendly and pollution-free; and the preparation process is simple, feasible and safe, does not introduce toxic substances, and is low in cost, and therefore, industrialization can be facilitated.

The application discloses a wear resistant polytetrafluoroethylene material and a preparation method thereof. The method comprises steps of: preparing polytetrafluoroethylene, aluminum oxide, bronze powder, silica, glass fiber, LCP, a coupling agent, graphite, molybdenum disulfide, GF, a flame retardant, UHMWPA, POM, PC and nano-titanium dioxide in parts by weight; mixing the substances; and extruding the mixture. For a product, the tensile strength is 27-32 MPa, and the breaking elongation is 300-320%; the Shore hardness is 60-80, and the abrasion amount is 0.001-0.005 mg; and the relative density is 2.6-2.8, and the wear width is 3.4-3.5 mm / h.

The invention relates to a high strength anti-microbial packaging bag, which belongs to the field of packaging bag technology. According to the invention, the packaging bag is prepared by the following raw materials by weight with melt blending, extrusion and film blowing steps: 100 parts of polypropylene resin, 3-7 parts of polyvinyl alcohol, 1-3 parts of bamboo fiber, 20-40 parts of starch, 0.2-1.5 parts of nanometer titanium dioxide, 0.02-0.7 parts of anti-oxidant, 15-30 parts of calcium carbonate, 5-10 parts of paraffin, 0.1-1 parts of silane coupling agent and 2-5 parts of epoxy soybean oil. The intensity of the packaging bag is increased by adding bamboo fiber; and the added bamboo fiber and titanium dioxide have antibacterial property, and the packaging bag has excellent antibacterial property; degradable polyvinyl alcohol and starch are added for degrading products and eliminating environment pollution, thereby not only reducing packaging bag cost, but also minimizing environment pollution with environmental protection.

The invention discloses a method for preparing an inorganic particle / epoxy resin super hydrophobic film. The method is characterized by comprising the following steps: (1) preparing amination nano silica and nano titanium dioxide particle; (2) preparing coating sol; (3) coating the sol on a substrate material; (4) performing post-treatment on substrate material, and finally preparing the inorganic particle / epoxy resin super hydrophobic film. The method is simple in process and good in repeatability, and the prepared coating has excellent super hydrophobicity and self-cleaning property and is suitable for industrial production of super hydrophobic paint.

The invention relates to a process for preparing a nanometer titanium dioxide ternary photocatalyst doped with nitrogen and rare earth elements. The process comprises the following steps of respectively preparing an aqueous solution of rare earth salt, an aqueous solution of titanium tetrachloride absolute ethanol and a nitrogen-containing compound solution; dropwise adding the aqueous solution of rare earth salt into a three-necked flask with a mixed solution, uniformly stirring and simultaneously dropwise adding the aqueous solution of titanium tetrachloride absolute ethanol and the nitrogen-containing compound solution, uniformly stirring, adding activated carbon, and further uniformly stirring; and finally aging at room temperature and drying to obtain a solid, grinding the obtained solid and calcining to obtain the nanometer titanium dioxide ternary photocatalyst doped with nitrogen and rare earth elements. The nanometer titanium dioxide ternary photocatalyst doped with nitrogen and rare earth elements, which is prepared by the process, has an efficient photocatalytic degradation effect on pollutants, especially organic pollutants.

The invention discloses a rare-earth load type nano-TiO2 antimicrobial and making method, a new antimicrobial which uses the rare-earth ions as the antibacterial active component and the rare-earth activate nano-anatase type TiO2 and optically catalyzes antibacterial activity, composed of rare-earth element and semiconductor carrier. The nano-anatase type TiO2 80-99 shares, Re(NO3)3 10.7-0.3 share, and HNO3, the concentration 85%, 9.3-0.7 share. It makes mixing, constant-temperature blending, filtering, drying, baking and grinding to get the product, average particle diameter being not more than 1 micron m, the content of nano-anatase type TiO2 being 75-98%, and that of Re2O3 being 0.2-2%.