82 results about "Nano-anatase" patented technology

A process for preparing the hydrosol of nano-class anatase-type TiO2 features that reaction between Ti-contained organic substance, distilled water or deionized water, chelating agent and hydrodecomposing inhibitor at 30-120 deg.C for 3-12 hr while stirring and controlling pH=1-5.

The invention provides a preparation and application method for photocatalysis environmental protection type painting, which relates to construction painting, especially provides a preparation and application method for photocatalysis function painting, which includes steps: mixing titanium-containing organic, water, chelating agent and hydrolysis inhibitor to prepare nano anatase type titanium dioxide water sol; adding metal, oxide or impure titanium dioxide photocatalyst into the titanium dioxide water sol and stirring equably. Using method is coating inorganic isolated layer firstly and coating the photocatalysis painting after drying. Advantages of the invention are: the prepared painting and using technique can be widely used for inner and outer wall surface of building and is harmless to bottom ainting, photocatalysis efficiency is high, cost is low, bonding is firm, transparency is good, preparation is simple, and usage is easy.

A functional water paint with self-cleaning, antimildew, bactericiding and air-cleaning functions for building contains (5-100)-nm anatase-type titanium oxide as photocatalyst (10-46%) and water-soluble resin or polymer emulsion or silicon sol or their composition as water adhesive (26-35%). It features that the various organic substances in the air or water in contact with its surface can be decomposed into CO2 and water. Its advantages are high effect and safety and durable acting.

The invention discloses a honeycombed SCR (selective catalytic reduction) denitrification catalyst for low-temperature flue gas denitrification and a preparation method of the honeycombed SCR denitrification catalyst. According to the method, mixed powder of nano-anatase titanium tungsten powder and titanium silicon powder is used as a carrier of the catalyst; active components include metal compounds containing manganese, cerium, iron and zirconium; additives include an acid solution, an alkali solution, a structural promoter and a binder; and the honeycombed SCR denitrification catalyst, based on 100 parts of carrier, is prepared by the following raw materials by mass: 100 parts of carrier, 3-10 parts of manganese-containing precursor based on manganese, 1-6 parts of cerium-containing precursor based on cerium, 1-6 parts of iron-containing precursor based on iron, 0.5-8 parts of zirconium-containing precursor based on zirconium, 0.8-3 parts of acid solution, 5-15 parts of alkali solution, 11-29 parts of structural promoter, 1-6 parts of binder, and 13-26 parts of water. According to the catalyst prepared by the preparation method provided by the invention, the low-temperature (at 80-120 DEG C) activity of the SCR denitrification catalyst is effectively improved, and the strength and the molding rate of the monolithic honeycombed SCR denitrification catalyst are greatly improved.

A process for preparing nano anatase-type TiO2 from the solution of titanium sulfate by hydrothermal crystallizing includes such steps as hydrothermal precrystallizing at 80-150 deg.C, and sintering at 350-800 deg.C. Its advantages are high dispersity and stability, low cost and less environmental pollution.

The nano TiO2 can be uniformly dispersed in medium, then uniformly coated on the ceramic surface, and roasted at high temp. to make TiO2 nano particles uniformly distributed on the glaze, and do not affect degree of finihsed of glaze. The TiO2 can be reacted with surface water and O2 in the air under the sunlight, and can release atomic oxygen and hydrogen-oxygen free radical to kill bacteria.

The invention discloses a method for preparing a finishing varnish with photocatalytic activity, and the method belongs to the field of building coating. The method comprises the following steps of: dissolving titanium tetrachloride into a cold water to form solution, and dripping excessive hydrogen peroxide into the solution to obtain a titanium peroxide compound; dripping ammonia water into the titanium peroxide compound until the pH of the titanium peroxide compound is 10, stirring to react, filtering and washing to obtain hydration titanium peroxide; and dissolving the hydration titanium peroxide in the water, adding nano silicon dioxide sol for hydrothermal reaction, and thus obtaining a product-nano titanium dioxide compound silicon dioxide gel, i.e. the finishing varnish with photocatalytic activity. When the low-temperature decomposition hydration titanium peroxide is adopted by the method to prepare the nano titanium dioxide sol, the nano silicon dioxide sol is added, so that the photocatalytic activity of nano anatase obtained after the reaction is higher, and a film can be formed later due to hydroxyl on a silicon dioxide surface; and the nano titanium dioxide is an inorganic substance and cannot be easily decomposed through the photochemical catalytic reaction of titanium dioxide.

The invention relates to a low-temperature sintered zinc titanate high-frequency dielectric ceramic and preparation method, wherein the ceramic comprises zinc oxide produced by decomposing one portion of basic zinc carbonate, one portion of anatase nano-TiO2 and 0.75-1.00 wt% of vanadium pentoxide and diboron trioxide additive, wherein the basic zinc carbonate is used for producing zinc oxide, the preparation comprises ball grinding, drying, grinding, forming, pre-calcination, sintering and silvering.

The present invention provides a novel manufacturing process for producing a high surface area USP grade titanium dioxide in the nano-anatase form. In a manufacturing method aspect of the present invention, a process of producing a high surface area USP grade TiO₂ nano-anatase base is provided. The method involves steps of: a) phosphorus doping of the titanium hydrate obtained in hydrolysis of a titanium compound; b) drying and calcination of the doped paste, thereby producing a high surface area USP grade titanium dioxide in the anatase crystal form with nano-particles suitable for UV screens and cosmetics.

The invention discloses a process for preparing nano anatase titanium oxide from metatitanic acid as raw material through the steps of, processing ammonium bicarbonate aqueous solution, dipping, agitating, filtering, high temperature heat treatment for disintegrating fractionation.

The invention relates to a nontoxic rare-earth denitration catalyst and a preparation method and application thereof. The preparation method includes: adopting rare-earth FCC waste agent in oil refining catalyst and hydrogenation waste agent containing tungsten and molybdenum, smashing and grinding, extruding the rare-earth FCC waste agent and the hydrogenation waste agent with high-aluminum cement and starch for molding, and solidifying to form a cellular blank; using a hydrothermal method for in-situ growing of nano anatase TiO2 to form a composite oxide carrier of a shell layer-blank structure; impregnating active components loaded by rare earth, zirconium and manganese, and calcining and activating. The catalyst has a step hole system with micro holes smaller than 2nm, medium-hole-gap medium holes of 2-5nm and large-hole-gap accumulation holes larger than 5nm, thereby being conducive to diffusion of reactant and resultant in the process of smoke denitration and having high NOx conversion activity within a wide temperature range; V2O5 which is toxic is not used for preparation, so that damage to environment and personnel in each link is avoided, and SO2/SO3 conversion rate is lowered; active component consumption and high-temperature sintering step are reduced, the oil refining agent is recycled, preparation cost is saved, and green preparation friendly to environment is realized.

The invention discloses a synthetic method of nano anatase titanium dioxide powder. The method comprises the following steps: 1) dropping a titanium oxide precursor in water, performing a hydrolysis reaction to obtain white precipitate, after reaction is completed, obtaining a solid-liquid mixture; 2) adding an alkyl ammonium hydroxide solution in the mixture obtained in the step 2), uniformly mixing the materials and aging the materials; and 3) adding a glacial acetic acid solution in the aged product obtained in the step 2), performing a constant temperature reaction, after the reaction is completed, separating the product, cleaning the product and drying the product to obtain the nanometer titanium dioxide powder. The method has the advantages of simple process, low synthesis temperature, mild condition, easy operation and high output, the size of the prepared titanium oxide nanoparticle is small, and the method is suitable for preparing a catalyst for selective catalytic denitration or a photocatalysis.

The invention discloses a preparation method of a nano anatase-phase titanium dioxide, which adopts a liquid-phase depositing method and comprises the following steps of: 1) preparing an LPD (liquid phase depositing) depositing solution composed of 0.05 M of titanium salt and 0.1-0.15 M of boric acid; adjusting pH of the depositing solution to 2.8-3.0 by hydrochloric acid; 2) sealing the LED depositing solution obtained by the step 1) and performing thermal insulation for 2-8 hours and controlling the temperature in a range of 45-55 DEG C; 3) filtering and washing the system obtained by the step 2) and drying at a room temperature; and 4) sintering the product dried by the step 3), wherein the sintering temperature is 450 DEG C; and performing thermal insulation for 2-3 hours and cooling to the room temperature. Compared with the titanium dioxide without a nano cone characteristic, the lithium storage capacity of the titanium dioxide is improved by a nano cone structure containing a {100} crystal face, and the multiplying power performance is improved, and thus the preparation method provided by the invention lays a good foundation for constructing a lithium battery cathode composite material with high performance and the practicability of the lithium battery cathode composite material.

The invention discloses dielectric ceramic for a high-frequency section and a preparation method thereof. The dielectric ceramic comprises basic zinc carbonate, nanoanatase titanium dioxide, basic magnesium carbonate, tin dioxide and additives, and specifically comprises the following raw materials in parts/percentage by weight: 1-x parts of generated zinc oxide, x parts of generated magnesium oxide, 1-y parts of nanoanatase titanium dioxide, y parts of tin dioxide and 1.0-2.0 percent of additives, wherein x is more than or equal to 0 and less than or equal to 0.8; y is more than or equal to 0.08 and less than or equal to 0.2; and the molar ratio of the additives is 3:1. The preparation method comprises the following steps of: heating the raw materials for decomposing; pre-burning; preparing mixed powder; molding; and sintering to obtain the dielectric ceramic for the high-frequency section. The dielectric ceramic for the high-frequency section is derived on the basis of doping and modification of a system, has high chemical stability, and is suitable for making a flaky element taking a sputtered metal such as silver, copper or silver/copper alloy and the like as an inner electrode. By adopting the dielectric ceramic, the manufacturing cost of the flaky element is effectively lowered.

The invention discloses a vanadium pentexide modified nano composite material capable of decomposing oil fume. The material comprises the following components by weight: 80 to 120 g of nanometer anatase titanium dioxide, 10 to 15 g of tungsten trioxide, 20 to 65 g of vanadium pentexide, 500 to 1,000 g of water, and 5 to 20 g of sodium hexametaphosphate. The material can be spread on a range hood to decompose the oil fume into carbon dioxide gas and vapor to volatilize the oil fume without cleaning in any mode and kill other viruses and bacteria in a kitchen to protect the environment.

The invention relates to a method for controlling the appearance of the anatase Tio2 by taking NaAc as additive. The method comprises the steps as follow: (1) isopropyl titanate is used as the raw material and trolamine is used as stabilizing agent, and then water is added into to form the Ti4+ solution, and the mol rate of trolamine and isopropyl titanate is 0: 1.0; (2) water is added into the Ti4+ solution in the same volume of the Ti4+ solution and then is mixed evenly; (3) the additive NaAc which is used for controlling the appearance is added into, and the solution PH value is adjusted to implement a first aging so as to obtain viscolloid; and (4) the nanometer anatase Tio2 grain is obtained after being aged by gelling. The anatase TiO2 prepared with the invention has the advantages of even granularity, good dispersivity, simple preparation technology and easy generalization, thereby being capable of controlling the appearance into a cube shape and a stick shape.

The invention disclose a method for improving photoluminescence of nano anatase TiO#-[2] by employing an electron beam co-radiation method in the environment of atmospheric temperature and normal atmosphere, wherein methyl methacrylate is grafted on the nanocrystalline surface of the anatase titanium dioxide (Anatase. A-TiO2). The processed anatase TiO2 nano powder can be combined firmly with methyl methacrylate (MMA) through chemical bonds.

A process for preparing nano-class anatase-type titanium oxide includes such steps as preparing the suspension of naon carrier with water, proportionally adding solution of TiCl4, adding alkali solution to regulate pH value to 6-9, generating solid phase, washing and calcining. Its advantages are high specific surface area, and high surface activity.

The invention discloses low-temperature flue gas denitration catalyst powder and a preparation method of the low-temperature flue gas denitration catalyst powder. The low-temperature flue gas denitration catalyst powder takes vanadium oxide, molybdenum oxide and tungstic oxide as main active components, takes phosphorus oxide, boron oxide and copper oxide as auxiliary active components and takes titanium dioxide as a carrier. The preparation method comprises the following steps: dissolving ammonium metavanadate, ammonium heptamolybdate and ammonium paratungstate into de-ionized water, and adding copper nitrate, boric acid and triammonium phosphate; heating and adjusting the pH value of the solution to be 2.0 to 3.0; slowly adding nano anatase titanium dioxide into an active component solution and dispersing the mixed active component solution by utilizing ultrasonic waves; drying and calcining to obtain the catalyst. According to the low-temperature flue gas denitration catalyst powder, the activity and the catalytic capability of the low-temperature denitration catalyst are remarkably improved; the low-temperature flue gas denitration catalyst powder has higher mechanical strength and anti-corrosion property, has stronger industrial application value and can be widely applied to NH3 selective catalytic reduction of nitrogen oxide in flue gas.

The invention provides a preparation method for nano anatase-type titania photocatalyst, which comprises: heating titanium sulfate solution till boil to hydrolyze and generate hydrated titania crystal nucleus, adjusting upward the pH value with ammonia to boost hydrolysis and make hydrated titania grow evenly; depositing fully, separating, cleaning, drying, and calcining at 300-600Deg. This process needs low cost and short time, and has high yield without pollution. The product has 5-25nm primary grain size, can degrade organic pollutant in water high efficiently, and can recycle for usage.

The invention discloses polyurethane antistatic floor paint. The floor paint comprises the following components in parts by weight: waterborne polyurethane resin 65-70 parts, hexamethyl disiloxane 6-8 parts, nano anatase titania 5-8 parts, styrene-butadiene emulsion 13-15 parts, a polyurethane curing agent 5-12 parts, benzoguanamine formaldehyde resin 13-15 parts, p-methyl benzenesulfonic acid 3-5 parts, acetic acid 8-11 parts, ethylenediaminetetraacetic acid disodium salt 10-12 parts, a polyurethane type dispersant 10-15 parts, vinyltriethoxysilane 6-12 parts, and mica powder 10-15 parts. The polyurethane antistatic floor paint can effectively prevent static electricity, is environmentally friendly, and high in weatherability, and a paint film is smooth in surface, hard, wear-resistant, pressure-resistant and impact-resistant, corrosion resistance is good, effect protection can be implemented, the service life is long, and construction is facilitated.