179 results about "Anatase" patented technology

The invention belongs to the field of functional textile materials, and provides a cool-feeling anti-ultraviolet nylon fabric and a preparation method thereof, and the cool-feeling anti-ultraviolet nylon fabric adopts a design scheme of combining a boron nitride / titanium dioxide composite filler with a beta-hydroxyl ether type ultraviolet absorption silane coupling agent surface modification technology. Uniform loading of hexagonal boron nitride on the surface of anatase type titanium dioxide is realized through an in-situ heat treatment process, a composite structure with heat conduction and ultraviolet shielding functions is constructed, and a complete process flow of master batch preparation, melt spinning, weaving, after-treatment and the like is matched; the ultraviolet protection coefficient UPF of the fabric is not lower than 40, the UPF retention rate after 20 times of household washing cycles is not lower than 80%, and the cool feeling qmax at the contact moment is not lower than 0.20 W / cm, the technical problem that an existing nylon fabric is insufficient in ultraviolet resistance and cool feeling function is solved, and the fabric has wide industrial application value.

The invention relates to the technical field of mineral exploration, and discloses a method for estimating the mineralization probability of residual slope product type anatase based on multi-source parameters, and the method comprises the steps: determining a geographic region, collecting geological data, sampling a geological sample, and collecting the characteristics of the sample; extracting the first characteristic index set to judge the region classification of the geographic region, wherein the region classification comprises a conventional exploration region, a main mineralization mode region and a secondary mineralization mode region; extracting a second characteristic index set from the geological data to calculate a standard mineralization probability; calculating a weathering correction coefficient and a maturity correction coefficient; and correcting the standard mineralization probability to generate a mineralization probability, and judging whether the geographic region is a high-potential target region or not according to the mineralization probability. According to the technical scheme, the metallogenic probability judgment standard can be determined and corrected under different conditions, and judgment of a high-potential target region is achieved.

The invention discloses a composite film based on light-biological synergistic gradient degradation and a preparation method thereof, the composite film sequentially comprises a light response layer, a transition layer and a biological response layer from outside to inside, and the light response layer comprises a polycaprolactone matrix, a tetraphenylporphyrin iron photosensitizer and anatase type TiO2 nanorods; the transition layer is a gradient blend of polylactic acid and modified starch; the biological response layer comprises polyhydroxyalkanoate and bacterial cellulose nanofibers; through the design of the three-layer gradient structure and the construction of the bionic microchannel, the synergistic effect of light degradation, hydrolysis and biodegradation is realized; the composite membrane has excellent mechanical properties and environmental adaptability, the degradation period can be accurately regulated and controlled within 30-180 days, and the soil degradation rate within 60 days reaches 91% or above; the preparation method comprises the processes of electrostatic spinning, gradient co-extrusion and bacterial cellulose in-situ culture. The material can be widely applied to the fields of agricultural mulching films, food packaging and the like, and the problems that a traditional degradable film is poor in mechanical property and uncontrollable in degradation are solved.

The invention discloses a high-sulfur-tolerance SCR honeycomb denitration catalyst and a preparation method thereof, and belongs to the technical field of industrial catalysts.The preparation method comprises the steps that S1, anatase type TiO2 and NH4HCO3 are mixed for pulping, pre-drying and calcination are conducted after extrusion forming, and a green body is formed; s2, carrying out nitric acid treatment on the green body, dipping the green body in a mixed solution of copper nitrate hydrate and cerium nitrate hydrate, and carrying out vacuum dipping, microwave drying and two-stage calcination to obtain a desulfurization carrier; s3, depositing an ammonium metatungstate precursor on the surface of the desulfurization carrier through CVD, and calcining to form a WO3 transition layer; and S4, dipping the transition layer in an acid solution containing NH4VO3 and ammonium metatungstate, and calcining after ultrasonic treatment to obtain a finished product. According to the method, the pore structure of the carrier is optimized through chambering treatment, and the stability and denitration efficiency of the catalyst in high-sulfur flue gas are remarkably improved by combining a multistage sulfur-resistant mechanism that the desulfurization layer preferentially captures SO2, the WO3 transition layer obstructs sulfur penetration and the denitration layer is protected by active sites.

The invention discloses a high-temperature denitration catalyst used based on a garbage incinerator and a preparation process thereof, and relates to the technical field of catalysts, the high-temperature denitration catalyst comprises a catalyst, the catalyst takes anatase type titanium dioxide as a carrier and vanadium pentoxide and tungsten oxide as active components, nickel powder is added to prepare a mixed solution, and the mixed solution is used for dipping, calcining and forming the carrier. A large amount of nickel powder is added into an original catalyst for mixing, so that when the catalyst is in a garbage incinerator, the provided high-temperature condition drives nickel and oxides to react with water vapor, the existence of water in a catalyst environment is reduced, the reaction of SO2 and NH3 is improved, the conversion rate of NO is increased, and the conversion performance of the catalyst is improved.

The invention discloses a preparation method of TiO2 powder with a rutile and anatase core-shell structure, and particularly relates to the technical field of photocatalytic material preparation. According to the method, rutile phase TiO2 powder is used as a core material, a titanate intermediate layer is formed on the surface of a particle through an accurately controlled hydrothermal alkali treatment process, and then a surface layer phase is converted into an anatase phase through acid pickling treatment and controllable heat treatment, so that a complete core-shell heterojunction structure is constructed. The process flow is relatively simple, the cost is controllable, the phase structure conversion rate is high, and the shell thickness can be accurately regulated and controlled. The obtained TiO2 core-shell structure powder has excellent structural stability of a rutile phase and high surface reaction activity of an anatase phase, and shows remarkably enhanced photocatalytic degradation performance under the condition of ultraviolet irradiation, and the catalytic efficiency of the TiO2 core-shell structure powder is greatly improved compared with that of single rutile phase TiO2; and a new process method is provided for large-scale preparation of efficient photocatalytic materials.

Titanium dioxide (TiO2) forms the basis of devices for applications including sensing devices, solar cells, photo-electrochromics, and photocatalysis. Such devices exploit different phases of TiO2 within such devices and accordingly it would be beneficial to have an amorphous TiO2 precursor which allows crystalline phase spatial patterning, for the crystallization of the amorphous TiO2 precursor to be triggered at low energies, and with the crystalline phase controllable at room-temperature without necessitating complex handling whilst providing TiO2 phases that are stable over a prolonged period of time. Accordingly, there are provided processes for providing a TiO2 precursor and controlling the conversion of the TiO2 precursor from amorphous-to-anatase, amorphous-to-rutile, amorphous-to-mixture of anatase / rutile or from amorphous-to-anatase-to-rutile in a simple and efficient manner.

The present disclosure relates to a hierarchical porous titanosilicate molecular sieve containing framework titanium and anatase and a preparation method and application thereof. The titanosilicate molecular sieve has Ti 2p 3 / 2 XPS characteristics: the titanosilicate molecular sieve has spectral peaks at binding energy N1 and N2 positions; wherein the N1 is 459.2±0.2ev, the spectral peak peak area of the titanosilicate molecular sieve at the binding energy N1 position is recorded as A1; the N2 is 460.5±0.5ev, the spectral peak peak area of the titanosilicate molecular sieve at the binding energy N2 position is recorded as A2; X1 defined as below formula (1) is any value between 0.8-2.2ev: X1=N2-N1 formula (1); X2 defined as below formula (2) is any value between 0.1-0.8: X2=A2 / A1 formula (2). The present disclosure can exert the synergistic effect of framework titanium and anatase, can effectively improve the conversion rate of cyclohexanone oxime and the selectivity of caprolactam in the gas phase Beckmann rearrangement reaction of cyclohexanone oxime, and prolong the catalyst life.

The present disclosure belongs to the technical field of material synthesis and utilization of renewable clean energy, and provides a red titanium dioxide heterojunction, and a preparation method therefor and the use thereof. The preparation method for a red titanium dioxide heterojunction comprises: forming a first precursor of B-doped titanium dioxide; calcining the first precursor at a high temperature to obtain a second precursor of a B-doped titanium dioxide heterojunction; and mixing any one of (NH4)2TiF6, NH4TiOF3 and (NH4)2TiOF4 with the second precursor, followed by a nitridation treatment in an ammonia gas flow to obtain a red titanium dioxide heterojunction uniformly doped with a rutile phase and an anatase phase. In the present disclosure, titanium dioxide in a rutile phase can be nitrided by means of an ammonium fluotitanate treatment, such that a red titanium dioxide heterojunction uniformly doped with both a rutile phase and an anatase phase is formed, which heterojunction exhibits relatively high water oxidation activity in a photocatalytic water decomposition reaction.

Provided is a titanium oxide powder, wherein the A / BET specific surface area is 2.3×10-5[ms-1 / (m2 / g)] or higher when calculated from the BET specific surface area and the inverse A of the spin-spin relaxation response time T2 measured by performing pulsed NMR on a liquid mixture in which the BET specific surface area measured via the nitrogen adsorption method is at least 80m2 / g and less than 300m2 / g, the anatase content of the crystal phase measured by the powder X-ray diffraction (XRD) method is 90% or more, and the titanium oxide content prepared using ion-exchanged water is 10 mass%.

A glass article comprising a photocatalytic coating including a titanium nitride layer and an outer titanium oxide layer, preferably at least partially in anatase form, said article being configured to impart a blue colour in transmission to a multiple glazing unit in which it constitutes the outer face, said multiple glazing unit further comprising a low-emissivity coating on another face of said multiple glazing unit, in particular face 2 or 3.

The invention discloses a template agent P123-based 3DNSi / Nb-O composite material, niobium oxalate is used as a niobium source, ammonium fluotitanate is used as a titanium source and a fluorine ion regulator, boric acid is used as the fluorine ion regulator, and P123 is used as a template agent, and the preparation method comprises the following steps: firstly, preparing 3DNSi / Nb-O through a hydrothermal method, and then carrying out heat treatment to remove P123. The 3DNSi / Nb-O is anatase type TiO2, and the Nb element is doped into a TiO2 crystal lattice; the oxygen vacancy microstructure is of a three-dimensional structure composed of nanosheets; and the specific surface area is 25-35 m < 2 > / g. The niobium source is niobium oxalate; the titanium source is ammonium fluotitanate; the fluorine ion regulator is boric acid, and in addition, the ammonium fluotitanate is also the fluorine ion regulator; the template agent is P123. The invention discloses a magnesium hydride composite hydrogen storage material based on 3DNSi / Nb-O and a preparation method of the magnesium hydride composite hydrogen storage material. The initial hydrogen desorption temperature of the obtained MH-3DNSi / Nb-O is 185-230 DEG C; the hydrogen desorption amount is 6.0 to 6.5 weight percent; when the number of times of hydrogen absorption and desorption is 1000-1500, the hydrogen storage capacity is not obvious, and the hydrogen desorption capacity is kept at 6.9-7.1 wt.%.

The application provides a method for preparing an M-phase VO2 film by a light-assisted spray pyrolysis method and the M-phase VO2 film prepared by the method, and belongs to the field of nanometer materials. The method comprises the following steps: (1) preparing a vanadium dioxide spraying liquid: adding vanadium oxyacetonylacetone into anhydrous methanol, stirring and aging to obtain a vanadium dioxide spraying liquid with ultraviolet photosensitive properties; (2) preparing a vanadium dioxide film: introducing the vanadium dioxide spraying liquid in step (1) into an atomizer and spraying onto a substrate coated with a TiO2 anatase phase under ultraviolet light irradiation to obtain the M-phase VO2 film. The method enables vanadium ions to be chelated in the sol by stirring, and the vanadium dioxide spraying liquid has ultraviolet photosensitive properties. The purity of the VO2(M) film is improved by introducing a titanium dioxide transition layer, and the microstructure of the VO2(M) film is improved by ultraviolet light irradiation, thereby improving the visual transmittance and solar light regulation rate of the VO2(M) film.

The invention relates to a preparation method of a (Mo, C) co-doped titanium oxide photocatalyst, TiCl4, CaC2 and Na2MoO4 are taken as raw materials, doping is carried out by adjusting the molar ratio of C4 <-> to Ti < 4 + > and the weight ratio of WMoO3 to WTiO2, the (Mo, C) co-doped nano titanium oxide photocatalyst is formed, the photocatalytic hydrogen production performance of TiO2 is effectively improved, the hydrogen evolution performance reaches 10-12mmol / g.h under the irradiation of 300W xenon lamp light, and the (Mo, C) co-doped nano titanium oxide photocatalyst is prepared. A new way is provided for preparation of the co-doped anatase titanium oxide photocatalyst, and the method has a wide application prospect.

The invention discloses an alcohol modified TS-1 catalyst as well as a preparation method and application thereof, and belongs to the technical field of molecular sieve catalysts. The alcohol modified TS-1 catalyst is prepared by the following steps: preparing a mixed solution from SiO2, 0.04 TiO2, 0.30 TPAOH, 50 H2O and nMOH according to the molar ratio of SiO2: 0.04 TiO2: 0.30 TPAOH: 50 H2O: nMOH; carrying out hydrothermal reaction on the mixed solution to obtain the alcohol modified TS-1 molecular sieve catalyst in one step; the preparation method is simple, the crystallization rate of the molecular sieve is increased by adding alcohols, more titanium atoms can be promoted to enter a skeleton, formation of a Ti-OOH active intermediate is facilitated, and generation of non-active anatase is reduced; the TS-1 molecular sieve is high in crystallinity and shows relatively high activity and alkylene oxide selectivity in a long-chain olefin epoxidation reaction.

The application discloses a molecular sieve catalyst for synthesizing dianhydride from durene by gas phase oxidation, a preparation method of the molecular sieve catalyst and a method for synthesizing dianhydride, the molecular sieve catalyst comprises V, Al, P, O and Ti elements, and contains 0.1wt%-10wt% V2O5, 30wt%-60wt% Al2O3, 30wt%-50wt% P2O5 and 1wt%-20wt% TiO2 in terms of oxides; the structure of the molecular sieve is AFI structure, wherein the Ti element exists in the form of TiO2, and the TiO2 is in the form of anatase. The molecular sieve catalyst comprises V, Al, P, O and Ti elements. The catalyst is suitable for industrial production of dianhydride prepared from durene by gas phase oxidation, and has the characteristics of simple preparation process, high catalytic activity and high dianhydride yield.

The invention discloses a full-spectrum response type aerogel photocatalyst as well as a preparation method and application thereof. The full-spectrum response type aerogel photocatalyst has a multi-heterostructure, and the multi-heterostructure comprises an in-plane heterostructure of amorphous carbon, graphite carbon and a BCN ring and a TiO2 mixed crystal phase structure of anatase type TiO2 and rutile type TiO2. The catalyst can be applied to preparation of methanol through photo-thermal catalytic reduction of CO2 in any single wave band range or combined wave band range in ultraviolet light, visible light and near-infrared light; the preparation method of the full-spectrum response type aerogel photocatalyst comprises the following steps: a) preparation of reduced TiO2 nanoparticles; b) preparation of aerogel; and c) high-temperature carbonization. The aerogel photocatalyst not only can realize full-spectrum response, but also can realize in-situ generation and regulation of oxygen vacancies in photo-thermal catalysis, so that the efficiency of reducing CO2 to prepare methanol is improved.

The invention discloses superfine high-dispersion type nano TiO2 as well as a preparation method and application thereof, and the preparation method of the superfine high-dispersion type nano TiO2 comprises the following steps: adding a TiCl4 solution into a base solution containing ammonium polycarboxylate, polyether modified siloxane and ammonia water, and carrying out coprecipitation reaction to prepare the nano TiO2. According to the preparation method, through the synergistic effect among ammonium polycarboxylate, polyether modified siloxane and ammonia water in the base solution, nano TiO2 which is good in dispersity, uniform in particle size, spherical in microstructure, 5-10 nm in particle size and has a mixed phase of a rutile phase and an anatase phase is prepared, the preparation process is mild in reaction condition, simple in equipment requirement, short in process route and suitable for industrial production, and the preparation method is suitable for industrial production. The industrial production is easy, and the application field of the superfine high-dispersion type nano TiO2 is greatly widened.

The invention relates to the technical field of formaldehyde pollution treatment materials, and discloses a photocatalyst for degrading formaldehyde and a preparation method thereof, and the photocatalyst contains an activated carbon substrate, anatase TiO2 and modified nitrogen-sulfur co-doped carbon quantum dots. Wherein the carbon quantum dots are prepared from a hydroxyl-containing aromatic dianhydride compound, a carbon source compound and an amino-containing nitrogen-sulfur donor compound through a hydrothermal reaction, and can enhance formaldehyde adsorption and broaden light response to a visible light region; the crystal form and the hydroxyl content of TiO2 are regulated and controlled through ammonium fluoride; after being pretreated by nitric acid, the activated carbon and other components form a chemical cross-linked network, and the photocatalyst solves the problems that a traditional photocatalyst material is prone to adsorption saturation and low in light utilization rate.

What is provided is a titanium oxide powder having a BET specific surface area of 300 m2 / g to 480 m2 / g as measured through a nitrogen adsorption method, an anatase content of a crystalline phase of 90% or more as measured through XRD measurement, and a spin-spin relaxation time T2 of 46 ms to 103 ms obtained by performing pulsed NMR measurement of a 5 mass % suspension prepared using ion exchange water.

The invention relates to the technical field of SCR denitration catalyst preparation, in particular to an environment-friendly strong-arsenic-resistance denitration catalyst and a preparation method thereof.The preparation method comprises the following steps that anatase type TiO2 or a commercial vanadium-titanium-based catalyst, KMnO4 and manganese acetate are evenly mixed and subjected to ball milling, and mixed powder is obtained; dissolving an auxiliary agent precursor salt in an organic solvent, adding the mixed powder, and violently stirring to obtain a mixed solution A; dissolving NaOH or KOH in an organic solvent, and slowly adding into the mixed solution A to obtain a mixed solution B; transferring the mixed solution B into a hydrothermal kettle for hydrothermal crystallization, cooling and centrifuging to obtain sediment, and washing and drying the sediment to obtain the environment-friendly strong arsenic-resistant denitration catalyst. The catalyst prepared by the method has the effects of wide active temperature window and excellent arsenic poisoning resistance.

To provide a method for producing a titanium smelting raw material by which impurities can be separated and removed from ilmenite ore at a low cost in a short time.SOLUTION: An ammonium salt as a reactant is mixed with a pulverized product of ilmenite ore to form a mixture, and the mixture is heat-treated to obtain a reaction product, which is then dissolved in a solvent to form a suspension. A precipitate containing high-concentration TiO2 can be obtained by solid-liquid separation into a solid residue and a leachate and heating the leachate. The stepwise calcination of the precipitate makes it possible to produce anatase and rutile, respectively, with a high TiO2 concentration.SELECTED DRAWING: Figure 1

The purpose of the present invention is to provide an anatase-type titanium oxide powder having a high specific surface area and high dispersibility, and a method for producing the same. Provided is a titanium oxide powder having a BET specific surface area of 300-480 m2 / g (inclusive) as measured using a nitrogen adsorption method, and an anatase content of a crystal phase of 90% or more as measured by XRD measurement, the spin-spin relaxation time (T2) obtained by measuring a 5 mass% suspension produced using ion-exchanged water using pulsed NMR is 46-103 ms (inclusive).

The invention provides photocatalyst nanoparticles for air sterilization and a preparation method of the photocatalyst nanoparticles. The preparation method of the photocatalyst nano-particles for air sterilization comprises the steps of preparing nitrogen-doped titanium dioxide precursor sol, preparing nitrogen-doped titanium dioxide nano-particles, preparing a second mixed system and preparing Ag / Cu bimetallic loaded nitrogen-doped titanium dioxide nano-particles. According to the preparation method, the nitrogen doping amount, the calcining temperature and the heat preservation time are synergistically optimized, so that the obtained nitrogen-doped TiO2 nanoparticles have relatively high crystallinity and relatively large specific surface area while keeping stable existence of an anatase phase, thereby improving the separation efficiency of photo-induced electron-hole pairs and the number of surface active sites; under the irradiation of visible light, more hydroxyl free radicals, superoxide anion free radicals and peroxides can be generated, and bacteria, viruses and volatile organic compounds in the air can be efficiently oxidized, decomposed and inactivated. The invention also provides an air filtration nanofiber membrane.

This invention provides a titanium dioxide supported catalyst with titanium vacancies, its preparation method, and its application. The preparation method includes the following steps: (1) mixing titanium dioxide raw material with a fluorine-containing etchant and performing etching treatment; separating the resulting mixture into solid and liquid components; and heat-treating the resulting solid to obtain a titanium dioxide support rich in titanium vacancies; (2) mixing an active metal precursor solution with the titanium dioxide support to load the active component; and activating the solid obtained after solid-liquid separation to obtain a titanium dioxide supported catalyst. This invention provides a simple, low-cost, and easily scalable HF etching method for preparing anatase supports rich in titanium vacancies, thereby obtaining a Pd-based catalyst that possesses ultra-high room temperature formaldehyde oxidation activity requiring only room temperature treatment.

The invention discloses a COF-TiO2 covalent compound photocatalyst as well as a preparation method and application thereof, and belongs to the field of photocatalysts. According to the invention, an azide functional group is introduced to the surface of TiO2, and 1, 3-dipolar cycloaddition reaction catalyzed by Cu (I) is utilized to form covalent triazole connection with alkynyl in a COF skeleton, so that firm chemical combination of COF and TiO2 is realized, and the problem that TiO2 falls off in a photocatalytic cycle process is avoided; and the photocatalyst simultaneously retains an ordered layered structure of COF and an anatase phase structure of TiO2.

The present invention relates to a photocatalyst and a preparation method therefor. The photocatalyst according to the present invention comprises titanium dioxide with a bronze crystal phase and an anatase crystal phase so as to have high photoactivity, and thus is suitable for removing odors and toxic gases. In addition, the titanium dioxide included in the photocatalyst, according to the present invention, has a novel crystal phase having a charge separation effect superior to those of other crystal phases, and thus has improved photoactivity. Additionally, the photocatalyst of the present invention has high photoactivity, and thus is suitable for removing odors and toxic gases. In addition, the photocatalyst of the present invention has excellent durability against catalytic poisons formed on the surface of a catalyst during removal of VOCs and toxic gases (acetaldehyde, isovaleraldehyde, isovaleric acid and toluene).

This disclosure presents a red titanium dioxide heterojunction, its preparation method, and its applications, belonging to the field of materials synthesis and renewable clean energy utilization technology. The preparation method of the red titanium dioxide heterojunction includes: forming a first precursor of boron-doped titanium dioxide; calcining the first precursor at high temperature to obtain a second precursor of the boron-doped titanium dioxide heterojunction; mixing any one of (NH4)2TiF6, NH4TiOF3, and (NH4)2TiOF4 with the second precursor and then nitriding it in an ammonia stream to obtain a red titanium dioxide heterojunction uniformly doped with rutile and anatase phases. This disclosure utilizes ammonium fluorotitanate treatment to nitrid rutile titanium dioxide, forming a red titanium dioxide heterojunction uniformly doped with both rutile and anatase phases, exhibiting high water oxidation activity in photocatalytic water splitting reactions.

The invention discloses a method for synthesizing rutile type TiO2 nanorods by a molten salt method, and belongs to the technical field of material synthesis. The invention provides a method for synthesizing rutile type TiO2 nanorods by a molten salt method, which comprises the following steps: by taking anatase TiO2 nanoparticles as an initial raw material and KCl and K2CO3 as molten salts, carrying out dry grinding and mixing, and then calcining to obtain the rutile type TiO2 nanorods with uniform morphology and high length-diameter ratio, and the purity of the rutile phase exceeds 92%. The method is easy to operate, only simple ball milling is needed, no solvent or complex reaction equipment needs to be introduced, the synthesis time is only several hours, and the rutile TiO2 nanorod is efficiently synthesized in a short time.