313 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 discloses a catalyst capable of resisting multiple impurity elements and resisting poisoning CO oxidation as well as a preparation method and application of the catalyst. The catalyst is composed of a TiO2 carrier, and active component elements and auxiliary elements which are loaded on the surface of the TiO2 carrier, the active component element is selected from at least one of Pt, Pd and Ru; the additive element is selected from at least one of Sn, V, Mo, Nb, Zr, Cr and Mn; in the catalyst, the mass content of the active component element is 1-20 wt%, and the mass content of the auxiliary element is 0.05-1.5 wt%; the crystal form of the TiO2 carrier is selected from at least one of anatase and rutile; the elements of the active component exist in the form of high-valence high-dispersion single atoms, clusters or nano-particles; the additive element exists in the form of oxide.

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.

An engineered adsorbent for the selective extraction of lithium from brine solutions. Mixed metal oxides are introduced into the crystal lattice of anatase titania precursor. The invention offers significant advantages, including high adsorption capacity of the ion sieve, enhanced chemical stability of the sorbent, and higher Lithium selectivity.

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 provides a red titanium dioxide out-phase junction as well as a preparation method and application thereof, and belongs to the technical field of material synthesis and renewable clean energy utilization. The preparation method of the red titanium dioxide out-phase junction comprises the following steps: forming a first precursor of B-doped titanium dioxide; calcining the first precursor at a high temperature to obtain a B-doped titanium dioxide out-phase junction second precursor; and mixing any one of (NH4) 2TiF6, NH4TiOF3 and (NH4) 2TiOF4 with the second precursor, and carrying out nitrogen treatment in an ammonia gas flow to obtain the rutile phase and anatase phase uniformly doped red titanium dioxide out-phase junction. According to the invention, titanium dioxide in a rutile phase can be nitrided through ammonium fluotitanate treatment, so that a red titanium dioxide out-phase junction uniformly doped with two phases of rutile and anatase is formed, and the red titanium dioxide out-phase junction shows relatively high water oxidation activity in a photocatalytic water decomposition reaction.

An engineered adsorbent for the selective extraction of lithium from brine solutions. Mixed metal oxides are introduced into the crystal lattice of anatase titania precursor. The invention offers significant advantages, including high adsorption capacity of the ion sieve, enhanced chemical stability of the sorbent, and higher Lithium selectivity.

The invention relates to an oxygen-deficient nano material and a solid-phase melting zinc thermal reduction preparation method and application thereof, zinc powder is taken as a reducing agent, target metal oxide such as anatase type TiO2 and zinc powder are uniformly mixed, then mild high-temperature annealing treatment is carried out in an inert gas atmosphere, a product is washed by dilute acid / alkali, and the oxygen-deficient TiO2-x nano material is obtained. Similarly, oxygen deficient SnO2-x, ZrO2-x, and BaTiO3-x materials can be produced by such methods. Compared with the existing technologies of high-temperature hydrogen reduction, complex structure carbonization, solvothermal reduction and the like for preparing the oxygen-deficient nano material, the preparation method disclosed by the invention adopts a solid-phase molten zinc thermal reduction technology, takes environment-friendly and low-cost zinc powder as a reducing agent, and prepares the oxygen-deficient nano material by utilizing a solid-phase molten zinc thermal reduction process at a mild high temperature; the preparation method has the advantages of simple process, no special requirement on production equipment, processing universality and industrial production compatibility, successfully prepares a series of defect nanometer materials with adjustable oxygen defect concentration, and effectively prolongs the cycle life of the zinc battery by applying the defect nanometer materials to the negative electrode protection of the zinc ion battery.

The invention relates to the technical field of ink, and particularly provides self-cleaning ink and a preparation method thereof, an atomic layer deposition process is adopted to construct a double-shell structure on the surface of anatase TiO2, the inner layer is a 2-5nm SiO2 compact isolation layer, the outer layer is photoresponse polyurethane, and dynamic coating is formed through 365nm ultraviolet light curing. The formula of the ink comprises urethane acrylate, a diluent, a photoinitiator, double-shell TiO2 and an auxiliary agent. Through the synergistic effect of energy band regulation and control, dynamic coating and free radical capture, the self-cleaning coating has the characteristics of efficient self-cleaning, long-acting weather resistance and environmental protection.

The object of the present invention is to provide an anatase type titanium oxide powder having a large specific surface area and high dispersibility, and a method for producing the same. The titanium oxide powder has a BET specific surface area of ​​300 m2 / g or more and 480 m2 / g or less as measured using a nitrogen adsorption method, an anatase content of the crystal phase of 90% or more as measured using XRD measurement, and a spin-spin relaxation time T2 of 46 ms or more and 103 ms or less as measured by pulse NMR of a 5% by mass suspension prepared in ion-exchanged water.

The invention discloses a preparation method of a high-valence Nb < 5 + > doped H2TiO3 lithium ion sieve, and belongs to the technical field of preparation of inorganic materials. The method is simple and environment-friendly in process, free of organic matters and easy for large-scale production. The unique hollow structure and large specific surface area anatase type TiO2 are adopted as a titanium source, so that the specific surface area, porosity and particle dispersity of the H2TiO3 ion sieve are remarkably improved, adsorption active sites are increased, and the adsorption efficiency and capacity of lithium ions are improved; the structure of the lithium ion sieve is more stable by doping the titanium source with the hollow structure and Nb < 5 + >, and the dissolution loss rate of Ti < 4 + > is reduced. After multiple lithium ion adsorption / desorption cycles, the adsorption capacity of the lithium ion sieve is kept at a high level, and the dissolution loss rate of Ti < 4 + > is extremely low. The ion sieve has high adsorption efficiency, low solution loss rate and good cycle stability, is suitable for the fields of salt lake lithium extraction, lithium-containing wastewater treatment, lithium ion batteries and the like, can significantly improve the extraction efficiency and the battery performance, reduces resource waste and environmental pollution, reduces the production cost, and provides powerful support for technical progress and industrial development in related fields.

The invention discloses a ruthenium-iridium composite electrode prepared by an electrochemical codeposition method and a preparation method and application thereof, and the preparation method of the ruthenium-iridium composite electrode comprises the following steps: 1) taking a titanium sheet as an anode, taking a platinum electrode or graphite as a cathode, and placing the anode and the cathode in an aqueous solution containing F <-> for anodic oxidation; (2) putting the sample subjected to anodic oxidation into a tube furnace, and carrying out heat treatment in argon or nitrogen to obtain an anatase type TiO2 nanotube; 3) taking the TiO2 nanotube as a cathode, and controlling a certain current in an aqueous solution containing Ru salt, Ir salt, NaNO3 and a small amount of SbCl3 for co-deposition to obtain Ru and Ir nanocrystals; and 4) fully oxidizing the sample deposited with the Ru and Ir nanocrystals at a certain temperature to obtain the ruthenium-iridium composite metal oxide electrode. The method is short in technological process and high in precious metal raw material utilization rate, and the prepared ruthenium-iridium composite metal oxide electrode has the advantages of being high in chlorine evolution electrocatalytic activity and long in service life. As an electrode material, the material has important application prospects and is suitable for the fields of chlor-alkali industry, water treatment, metallurgy and the like.

The invention discloses a negative oxygen ion catalyzed SPC stone-plastic floor material and a preparation method and equipment thereof, and belongs to the technical field of stone-plastic floors, the negative oxygen ion catalyzed SPC stone-plastic floor material is prepared from polyvinyl chloride resin, ground calcium carbonate, nano titanium dioxide, tourmaline, nano magnesium oxide, a plasticizer, a lubricant, a surfactant and a stabilizer. According to preparation of the negative oxygen ion catalyzed SPC stone plastic floor material, porous anatase crystal type nano carbon dioxide particles doped with rare earth elements, tourmaline containing iron and manganese elements and nano magnesium oxide particles are added, so that the prepared negative oxygen ion catalyzed SPC stone plastic floor material has the function of releasing negative ions; the SPC stone-plastic flooring material has good air purification effect and good photocatalytic effect, overcomes the defects of low air purification effect and single function of the existing SPC stone-plastic flooring material, and is simple and feasible in preparation method and suitable for large-scale industrial production and application.

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 method for preparing an electromagnetic wave absorbing ceramic coating on a titanium alloy surface. The method comprises the following steps that (1) titanium alloy pretreatment is conducted, specifically, grinding and polishing and ultrasonic oil removal are conducted; 2) preparing a micro-arc oxidation solution; and 3) performing micro-arc oxidation treatment by controlling electrical parameters. The method is simple and controllable in process, easy to implement and suitable for large-scale industrial application. The prepared coating has wave absorbing performance, good corrosion resistance and high hardness, and the main components of the coating comprise titanium dioxide (rutile phase and anatase phase) and aluminum titanate. And high bonding strength and structural stability are achieved between the coating and the base body, and the corrosion resistance of the titanium alloy is remarkably improved.

The invention discloses a preparation method of a co-doped titanium oxide photocatalyst for hydrogen production through water photolysis and a product prepared through the preparation method, TiCl4 and magnesium nitride are used as raw materials, the co-doped MgCO3 / C-N-TiO2 nano titanium oxide photocatalyst is formed by adjusting the molar ratio of N < 3-> to Ti < 4 + > and conducting carbon doping, the photocatalytic hydrogen production performance of TiO2 is effectively improved, and the photocatalytic hydrogen production efficiency is improved. The hydrogen evolution performance can reach 2-3 mmol / g.h under the irradiation of a 300W xenon lamp, a new way is provided for preparation of a co-doped anatase titanium oxide photocatalyst, and the industrial requirement of photocatalytic hydrogen production of a titanium oxide material can be well met.

The invention relates to the technical field of photocatalytic material synthesis, in particular to an S-type covalent organic framework-titanium dioxide composite hollow sphere photocatalytic material as well as a preparation method and application thereof. An S-shaped covalent organic framework-titanium dioxide composite hollow sphere photocatalytic material is composed of titanium dioxide hollow spheres and covalent organic frameworks uniformly distributed on the surfaces of the titanium dioxide hollow spheres, and the titanium dioxide hollow spheres and the covalent organic frameworks form an S-shaped heterojunction. The titanium dioxide is of an anatase type. The photocatalytic material provided by the invention is stable in structure, large in specific surface area and capable of providing more active sites for photocatalytic reaction, and meanwhile, the ultrathin shell structure is beneficial to enhancing separation of photo-induced electrons and holes and promoting surface oxidation-reduction reaction by shortening the diffusion length of the photo-induced electrons and holes from the inside to the surface.

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.

The invention discloses a bimorph TiO2 composite carbon material which is prepared by the following steps: by taking Ti3AlC2 as a raw material, preparing single-layer Ti3C2Ox through HF etching, compounding the single-layer Ti3C2Ox with a titanium-based metal organic framework MIL-125 through a hydrothermal reaction, and finally, oxidizing and then carbonizing to obtain the bimorph TiO2 composite carbon material, namely TiO2 / C-TiO2 for short. The basic microstructure of TiO2 / C-TiO2 is in the shape of a round cake, and the size of a single round cake is 0.5-1 [mu] m; and rutile type TiO2 and anatase type TiO2 exist in the TiO2 / C-TiO2 at the same time. The preparation method comprises the following steps: 1, preparing single-layer Ti3C2Ox; 2, preparation of Ti < 3 > C < 2 > O < x > / MIL-125; and 3, the preparation of TiO2 / C-TiO2 is carried out. When the positive electrode material is used as a lithium-sulfur battery positive electrode material, the initial discharge specific capacity is 1200-1300mA h g <-1 > under the condition that the current density is 0.2 C; and under the condition that the current density is 0.2 C, after 200 times of charge-discharge cycles, the residual specific capacity is 700-800 mA h g <-1 >, and the capacity retention ratio is 55-60%.

The invention relates to the field of catalytic materials, and provides a metal oxide composite material for preparing ethane through photocatalytic methane conversion and a preparation method of the metal oxide composite material. The material is a ternary composite functional material with a multi-stage structure and multi-scale characteristics, and comprises a micron-scale porous alumina carrier skeleton which is prepared by a freeze drying method and has directional through columnar pore channels, CeO2 nanorods which grow in the pore channels in situ, and an anatase type TiO2 shell layer which coats the surfaces of the CeO2 nanorods. The composite material forms a CeO2-TiO2 core-shell structure and a TiO2 thin layer on the inner wall of a pore channel, and has excellent photocatalytic activity and thermal shock resistance. The activity attenuation rate does not exceed 10% after irradiation of a light source with the wavelength of 365 nm and 20 times of thermal cycles at the temperature of 25-800 DEG C. The preparation method comprises the steps of freeze-drying forming and heat treatment of an aluminum oxide framework, in-situ hydrothermal synthesis of CeO2 nanorods and hydrolytic deposition and calcination of a TiO2 shell layer, the process is simple and convenient, the repeatability is high, and the method is suitable for efficient and stable photocatalysis application.

The invention relates to the field of waste treatment, in particular to a titanium dioxide nanotube as well as a preparation method and application thereof. The nanotube is in an anatase crystal form, the tube diameter is 10 nm to 10 [mu] m, the specific surface area is 39.81-151.77 cm < 2 > / g, and the titanium dioxide nanotube has a mesoporous and microporous structure. The catalyst can be used as a catalyst for photo-thermal synergistic catalytic degradation of a refrigerant, has high reaction activity in photo-thermal synergistic catalytic degradation of the refrigerant, and realizes effective degradation with low temperature, low energy consumption, large flow, high speed and high refrigerant component proportion.

The preparation method comprises the following steps: adding a manganese-containing precursor solution into anatase type titanium dioxide, stirring, standing, uniformly infiltrating, and carrying out image monitoring and state analysis on the infiltration state of the solution by adopting an intelligent industrial control technology based on deep learning. According to the method, the solution local texture features are extracted to extract infiltration state information based on the solution local texture features, then feature dominant enhancement and uniformity scoring are carried out on the texture features of all local areas of the image, the overall infiltration uniformity of the solution is revealed in combination with a mathematical statistical method, and therefore reasonable control over the infiltration degree and infiltration time is facilitated. In this way, it can be ensured that nano-manganese dioxide is evenly distributed on the catalyst carrier, the infiltration time is effectively controlled, and therefore the preparation efficiency and quality stability of the catalyst are improved.

A Na2Ti7O15 doped Na2Ti3O7 sodium titanate electrode material, and a preparation method therefor and a use thereof. The electrode material has a porous block structure formed by stacking nanorods. The electrode material is synthesized by a simple solid-phase method, and is obtained by carrying out ball milling on precursors sodium carbonate and anatase-phase titanium dioxide in proportion, and then carrying out microwave sintering in air; the addition of Na2Ti7O15 increases the exposure of (100) sodium storage crystal face and decreases the exposure of (003) crystal face of Na2Ti3O7 sodium titanate; and Na2Ti7O15 has four TiO6 octahedrons in one structural unit, and has more sodium storage sites and wider sodium-ion diffusion channels, thereby improving the specific capacity and rate performance of the material. Upper and lower layers of TiO6 octahedrons in Na2Ti7O15 are connected to each other, such that the structure is more stable in a sodium-ion intercalation / deintercalation process, thereby improving the long cycle stability of the material.

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 invention discloses a methanol oxidation catalyst and a preparation method thereof, and relates to the field of catalysts. The nano titanium ruthenium oxide prepared by a low-temperature hydrothermal method is used as the carrier, the titanium ruthenium oxide crystal phase is of an anatase structure, the nano titanium ruthenium oxide crystal phase and the deposited nickel cobalt manganese metal form a composite structure, a synergistic effect is achieved, and the catalytic performance on methanol is improved. Titanium oxide ruthenium metal is pretreated and then soaked in a self-made water-phase nanometer nickel solution to form a first nanometer nickel metal layer, then surface modification is conducted through a silane coupling agent, then the first nanometer nickel metal layer is placed in a water-phase nanometer cobalt solution, the steps are repeated, a second nanometer cobalt particle layer and a third nanometer manganese particle layer are deposited, and the nanometer nickel metal layer is obtained. And finally, carrying out reduction treatment to obtain the methanol oxidation catalyst with the nano nickel-cobalt-manganese metal layer deposited by taking the titanium ruthenium oxide as the carrier. The catalyst prepared by the invention and methanol generate efficient chain exothermic reaction, the catalytic oxidation is complete, and the catalytic efficiency is high.

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.