57 results about "Suboxide" patented technology

The present invention relates to coated cerium suboxide particles, to a process for preparing coated cerium oxide or suboxide particles by means of flame spray pyrolysis technology, to the cerium oxide particles resulting from such a process, to compositions comprising such particles and also to the uses thereof.

The invention discloses an endogenous Joule heat catalyst for methane dry reforming and a preparation method and application thereof, the endogenous Joule heat catalyst comprises a titanium black carrier and an active metal loaded on the titanium black carrier, the titanium black carrier is selected from at least one of Ti4O7, Ti5O9, Ti6O11, Ti7O13, Ti8O15 and Ti9O17, and the active metal is selected from at least one of Ti4O7, Ti5O9, Ti6O11, Ti7O13, Ti8O15 and Ti9O17. The active metal is at least one of nickel, cobalt, rhodium, ruthenium, palladium, platinum and iridium, and the endogenous Joule heat catalyst has an electro-thermal characteristic. Titanium oxide is used as a carrier, a conductive TiO layer exists in crystal lattices of the titanium oxide and has conductivity, CO2 can be directly activated by the conductive TiO layer containing a large number of oxygen vacancies, CH4 can be efficiently activated by the loaded active metal, the titanium oxide and the loaded active metal jointly form a bifunctional catalytic activity system, and the catalyst can be self-heated through endogenous Joule heat due to the electro-thermal characteristic; energy loss caused by indirect heat transfer of an electrothermal material in the prior art is avoided, current can directly flow through the catalyst, and the reaction performance is effectively improved by coupling the endogenous Joule heating effect and the electronic effect.

The invention provides a porous titanium black ceramic body, a preparation method and application thereof and an electro-catalysis device. The preparation method comprises the following steps: carrying out sintering molding on a mixture of TiOx powder and a metal oxide type ionic crystal or firstly molding and then sintering to prepare a ceramic body containing the TiOx powder and the metal oxide type ionic crystal; carrying out acid pickling on the ceramic body to obtain a porous TiOx ceramic body; in the TiOx powder, x is more than 0 and less than or equal to 1; or carrying out sintering molding on the mixture of the TiO2 powder and the metal Mg, or firstly molding and then sintering to prepare a ceramic body containing the TiOx powder and the magnesium oxide; carrying out acid pickling on the ceramic body to obtain a porous TiOx ceramic body; in the TiOx powder, xlt is greater than or equal to 1; 2. The porous titanium black ceramic body has conductivity close to metal grade, a through porous structure and full-ceramic chemical stability, the preparation method is simple, the cost is low, and industrial production is facilitated.

The application relates to an oxide-based solid-state electrolyte and a preparation method and application thereof, and belongs to the technical field of methods or devices for directly converting chemical energy into electric energy. The preparation method of the oxide-based solid-state electrolyte comprises the following steps: uniformly mixing raw materials and additives of the oxide-based solid-state electrolyte by means of a dry mixing method to obtain a precursor; and performing calcination treatment on the precursor to obtain the oxide-based solid-state electrolyte; the additives comprise additive I and additive II; the additive I comprises at least one of magnesium oxide, silicon oxide and a silicate compound; and the additive II is a high polymer material. The preparation method can not only effectively reduce the expansion rate of the raw materials of the oxide-based solid-state electrolyte in a sintering process, but also effectively inhibit wall sticking of the oxide-based solid-state electrolyte, and the prepared oxide-based solid-state electrolyte has high phase purity and high fluidity.

The invention relates to a full-quantitative recovery method of high-chlorine zinc hypoxide, and belongs to the technical field of comprehensive utilization of secondary complex zinc resources. The high-chlorine zinc hypoxide and leaching residues containing silver and zinc are mixed and then are subjected to pyrogenic process smelting, the heat value of the high-chlorine zinc hypoxide is fully utilized, the volatilization energy consumption of valuable metals such as zinc, silver and lead is remarkably reduced, and the recovery rate of the high-chlorine zinc hypoxide is improved. And high-efficiency recovery of valuable metals is realized. After smelting smoke dust obtained after smelting is subjected to water leaching, acid leaching, acidification lead precipitation, neutralization zinc precipitation and concentration crystallization treatment, efficient separation of zinc and chlorine is achieved while lead, zinc and silver are recovered, the chlorine content in zinc enrichment liquid is greatly reduced, and the adverse effect of chlorine on zinc recovery is eliminated; meanwhile, chlorine in the high-chlorine zinc hypoxide is recycled as a calcium chloride product, so that the method has the advantages of low energy consumption, cleanness, high efficiency, no secondary hazardous waste and the like.

This invention discloses a method for preparing a rare-earth / carbon-doped titanium suboxide electrode, comprising: a. mixing titanium suboxide powder, carbon powder, rare earth elements, a binder, and a solvent to obtain a slurry; b. coating the slurry obtained in step a onto a porous titanium substrate and calcining it under an inert atmosphere to obtain the rare-earth / carbon-doped titanium suboxide electrode. The rare-earth / carbon-doped titanium suboxide electrode prepared by this method possesses excellent electrochemical characteristics and stable properties. It also exhibits excellent high-temperature resistance and corrosion resistance, making it suitable for deep treatment applications involving complex pollutants and demanding processing conditions. Furthermore, the raw materials are readily available, the preparation cost is low, the preparation method is simple, and it is easy to apply industrially.

The invention relates to the field of plasma thermal spraying and thermal spraying powder and wires, and provides a process for spraying titanium black to the surface of titanium metal through a plasma thermal spraying method. Titanium black powder is selected as a spraying material; atmospheric plasma spraying equipment is adopted for spraying, and the technological parameters are as follows: the power of a spray gun is 30-80 kW, and the spraying distance is 80-150 mm; the working gas comprises main gas and secondary gas, the main gas is argon or nitrogen, and the secondary gas is hydrogen or helium; post-treatment is conducted on a coating obtained through spraying, specifically, heat treatment is conducted at the temperature of 400-600 DEG C under the argon protective atmosphere, and heat preservation is conducted for 1-4 hours. Titanium black is sprayed to the surface of titanium metal through a plasma thermal spraying method, and titanium metal surface modification with high bonding strength, high hardness, high wear resistance and high chemical stability is achieved.

The application discloses a preparation and application of an iron-doped titanium suboxide electrode. The iron-doped titanium suboxide electrode is prepared by mechanically treating an iron compound and titanium suboxide, is used as an anode, and is used for synthesizing a disinfectant with natural seawater as an electrolyte and being coupled with photovoltaic technology, so that a solar energy driven electrolysis device is successfully constructed, the disinfectant with active components of hypochlorous acid is synthesized, and pathogenic bacteria in ballast water are killed. The electrode is composed of non-noble metal elements, and the price is much lower than that of a commercial size stable anode composed of noble metals ruthenium and iridium, and the electrode shows a reaction activity which is significantly higher than that of the commercial size stable anode, and the problem that high-abundance chlorine ions in seawater are difficult to be selectively oxidized to hypochlorous acid is solved. The electrode is stable in chemical properties, friendly to the environment, and cannot cause secondary pollution, and can be driven by solar energy to electrochemically synthesize a disinfectant without depending on power resources in ocean navigation, so that disinfection and sterilization of ship ballast water are realized, and the electrode is very worth promoting.

A target for sputtering, use of the target and method of manufacture of the target is provided. The target has a single piece target material for sputter deposition, with at least 1 mm thickness of material for sputtering, having a lamellar structure and comprising a metal oxide with at least 50 wt. % or more of tungsten oxide. The atomic ratio of oxygen over tungsten results in a compound with oxygen deficiency with respect to the stoichiometric tungsten oxide. The method includes spraying metallic tungsten and / or tungsten oxide powder in amounts so as to provide a layer of material for sputtering being at least 1 mm thick and comprising non-stoichiometric tungsten oxide.

This invention belongs to the field of thermodynamics and phase equilibrium measurement technology of metallurgical slag, and discloses a high-temperature phase equilibrium determination method for vacuum-sealed slag systems containing low-valent titanium oxides. The raw materials are roasted or dried; they are placed in a high-temperature resistant container according to a preset composition ratio, placed inside a quartz tube, and a deoxidizer is added; after vacuum preheating, argon gas washing, and adjustment of the vacuum level inside the tube, the slag is high-temperature sealed to form a thermodynamically closed system; the slag sample is held at the experimental temperature until it reaches thermodynamic equilibrium, and after the holding period, it is rapidly quenched to preserve the high-temperature phase structure; finally, the phase equilibrium is determined through characterization. This invention uses a closed system to effectively isolate external gas interference, and relies on the slag sample's own redox equilibrium to autonomously establish and maintain the ultra-low oxygen potential required for the stable existence of low-valent titanium oxides. This solves the technical problem that traditional atmosphere-controlled oxygen methods cannot meet the phase equilibrium determination of slag systems containing low-valent titanium oxides, and achieves accurate and reliable determination of the phase diagram of slag systems containing low-valent titanium oxides at steelmaking temperatures.

To provide a technique for reducing abnormal reaction during charging molten metal.SOLUTION: In a treatment method of molten metal, when a powdery solid including a lower oxide is charged into a reaction vessel and thereafter or simultaneously, C-containing molten metal is charged into the reaction vessel, at least one or more among an average grain size of the powdery solid, a ratio of contained oxygen and a charging quantity of the powdery solid into the reaction vessel are adjusted to suppress abnormal reaction at the time of charging the molten metal. In the treatment method, when the powdery solid containing a lower oxide is charged into the reaction vessel, and thereafter or simultaneously, a C-containing molten metal is charged into the reaction vessel, an index value A of abnormal reaction obtained from a relational expression between a reaction surface area per unit volume in consideration of an oxygen content in a lower oxide and a charging amount of the powdery solid into the reaction vessel is set to a predetermined value or less.SELECTED DRAWING: Figure 1

This invention relates to the field of wastewater treatment technology and discloses a composite catalytic electrode based on titanium suboxide and its preparation method. The composite catalytic electrode consists of a titanium plate substrate, a conductive titanium suboxide transition layer, and a BDD catalytic layer grown under core-shell seed conditions. Its preparation method comprises five steps: titanium plate substrate pretreatment, preparation of the conductive titanium suboxide transition layer, surface composite modification, construction of the core-shell seed layer, and low-temperature CatCVD deposition. This invention solves the problems of high interfacial stress, insufficient bonding strength, high-temperature oxidation, and difficulty in bonding between the titanium substrate and BDD in existing BDD-based electrodes. The electrode interfacial bonding strength is ≥6.0 MPa, the BDD crystallinity is ≥88%, and in the treatment of high-concentration, recalcitrant organic wastewater with COD ≥1000 mg / L, the COD removal rate is ≥98.0%, with excellent cycle stability, demonstrating significant practical application value.

The invention discloses a synchronous in-situ modification method for multi-section temperature control vacuum solid phase preparation of silicon monoxide, and belongs to the technical field of silicon monoxide preparation. According to the method, the waste silicon powder and silicon dioxide precast blocks are subjected to segmented heating in a heating area, so that the waste silicon powder is fully activated, solid-phase reaction between silicon and silicon dioxide is promoted to be fully carried out, and silicon monoxide gas is generated; the silicon monoxide enters a volatilization area, and the precise control of the volatilization rate of the silicon monoxide gas is realized by adjusting the temperature in sections, so that the conversion efficiency and the mass transfer rate of reactants are improved; then the silicon monoxide enters a heat preservation area, crystalline silicon phases in the silicon monoxide are uniformly dispersed and distributed through segmented temperature regulation and control, in-situ modification reaction is synchronously carried out, then the silicon monoxide negative electrode material with a uniform structure and excellent performance is obtained, the capacity of the silicon monoxide negative electrode material is still 1000 mAh / g after the silicon monoxide negative electrode material is circulated for 200 circles under the current of 0.5 A.g <-1 >, and the capacity of the silicon monoxide negative electrode material is not larger than 1000 mAh / g. And a feasible development direction is provided for subsequent industrial application of silicon monoxide in the field of lithium ion battery negative electrode materials.

The invention relates to a high-temperature self-stabilization ferroelectric domain wall memory based on bismuth oxide (BFO) and a preparation method thereof, a memory function layer is formed by sequentially depositing an STO buffer layer with the thickness of 5 nm, a BFO film with the thickness of 100 nm and a planar Pt electrode pair on a strontium titanate (STO) substrate in the [001] direction, the STO substrate is obliquely cut by 0.2 degree in the [100] direction, the BFO film is of a stripe domain structure, and the electrode gap is not smaller than 500 nm. Through the limiting effect of a beveled substrate step, the BFO ferroelectric film only forms two polarization orientations, a periodic stripe domain structure is obtained, the polarization overturning controllability is improved, the electrode is prepared by adopting an electron beam photoetching and ion etching combined process, the electric domain overturning is ensured to penetrate through the film thickness, and the performance of the BFO ferroelectric film is improved. After 105 times of voltage pulse cycles at a high temperature of 135 DEG C, the device still keeps a rectification ratio greater than or equal to 25: 1, the turnover polarization retentivity is high, and the domain wall current attenuation rate is small. The bottleneck that a traditional FeRAM fails in a high-temperature environment is broken through, the storage density potential is larger than 1 Gb, and the FeRAM has the effect of being suitable for high-temperature application scenes such as aerospace, vehicle-mounted electronics and geothermal exploration.

The present invention provides a proton exchange membrane water electrolysis anode catalyst, a preparation method and application thereof. The anode catalyst comprises a carrier and IrOx (1<x≤2) loaded on the carrier and a passivation layer, wherein the carrier comprises metal nitride, metal carbide, metal element and metal suboxide, and the passivation layer is an oxide formed by the metal in the carrier. The present invention heat-treats the carrier loaded with elemental iridium so that a dense oxide layer is constructed on the surface of the carrier as a passivation layer, which can effectively inhibit the uncontrollable deep oxidation of the carrier and thus improve the overall operation stability of the catalyst. At the same time, the elemental iridium loaded on the surface of the carrier is oxidized to an IrOx phase with excellent activity, ensuring that the loaded low-Ir catalyst has IrO2-like performance. The anode catalyst reduces the amount of precious metal Ir used and has excellent catalytic activity and stability.

The invention belongs to the field of inorganic materials, discloses a preparation method of small-size and single-phase titanium black, and solves the problems that the preparation of titanium black through carbon thermal reduction needs a relatively high temperature, the particle size of a product is large, and a crystal phase is difficult to regulate and control. The small-size single-phase titanium black is prepared by taking a titanic acid nanotube with high specific surface area, rich hydroxyl groups on the surface and high reaction activity or titanium dioxide derived from the titanic acid nanotube as a titanium source and a carbon source with good water solubility and active groups through hydrothermal and calcining treatment. Carbon is more easily and uniformly distributed in a titanium source by regulating and controlling a hydrothermal medium and improving the surface property of a carbon thermal reduction precursor and the contact mode of the Ti source and a carbon source, an unsaturated bond is introduced, additional reduction electrons are provided for a system, and in addition, due to the unique hollow tubular structure, the carbon-carbon composite material has a good application prospect. According to the preparation method, a reducing gas generated in the carbon thermal reduction process can permeate into the material, the reduction efficiency is improved, and the possibility of non-uniform reduction is reduced, so that the small-size and single-phase titanium black is obtained at a relatively low temperature.

A glass-ceramic includes glass and crystalline phases, where the crystalline phase includes non-stoichiometric suboxides of titanium, forming ‘bronze’-type solid state defect structures in which vacancies are occupied with dopant cations.

The present invention relates to a powdered silicon oxide, a preparation method and its use. The preparation method of the powdered silicon oxide comprises: mixing silicon and silicon dioxide powders in required amounts and putting them into a vacuum rotary kiln; under vacuum conditions, the vacuum rotary kiln drives a material lifting plate for disturbing mixing inside the kiln; at this time, the cooling zone is rotated and closed, and heating is performed while stirring and mixing. When the temperature is heated to the reaction temperature, the rotation is stopped, and heating and reaction are continued to obtain silicon oxide vapor; after the reaction is complete, the rotation control of the furnace body in the cooling zone is turned on, and an inert gas is introduced from the bottom of the furnace body (in the opposite direction of the condensation and sinking of the silicon oxide vapor), and the collected materials are cooled to obtain powdered silicon oxide; the vacuum rotary kiln comprises internal parts that can disturb mixing, and the high-temperature reaction zone and the cooling zone have independent rotation control, and there is a vent below the condensation section furnace body. The negative electrode material obtained by using the powdered silicon oxide of the present invention can reach a capacity of more than 1600 mAh / g after carbon coating, and the first efficiency is more than 78%. The silicon oxide negative electrode material can be used as a negative electrode active material in the field of lithium ion batteries.

Provided is a porous titanium suboxide which has: a crystallite diameter of 60 nm or more; and a ratio of the volume of mesopores having a diameter of more than 2 nm and less than 50 nm to the total pore volume, of 70 vol % or more.

The present application relates to a kind of wide-range lead ion colorimetric detection method based on four manganese oxide laccase activity anti-competitive inhibition, it is related to lead ion colorimetric detection technical field.The method utilizes the activity change of Mn3O4 catalysis 2,4-dichlorophenol and 4-aminoantipyrine color reaction as signal output, when Pb (II) exists in system, color reaction is inhibited, the absorbance of solution at 510 nm is significantly reduced;The detection range of the method to Pb (II) covers 1~2000 μM, the detection limit in low concentration interval is as low as 0.31 μM, in high concentration interval still maintains good linear response, the detection range is far more than most of the colorimetric detection methods currently reported, and simultaneously, the method has excellent selectivity and anti-interference to Pb (II).

The invention discloses a titanium black electrode material for removing COD (Chemical Oxygen Demand) and a preparation method of the titanium black electrode material. The electrode material is composed of titanium black, tin dioxide, iridium oxide, ruthenium oxide, carbon nanotubes, a binder and a pore-forming agent in specific parts by weight. The preparation method comprises the following steps: ball-milling and mixing the raw materials, forming slurry with absolute ethyl alcohol, coating a titanium mesh substrate with the slurry, carrying out cold press molding, and then sequentially carrying out segmented sintering and acid liquid surface activation. Through the synergistic effect of multiple active components and conductive components, the catalytic activity and the current efficiency of the electrode are remarkably improved, and the service life of the electrode is remarkably prolonged. The electrode is particularly suitable for treating high-salt and high-chloride-ion nanofiltration concentrated water, under the conditions that COD is 700 mg / L and chloride ions are 13,000 mg / L, the COD removal rate can be 85% or above, the average current efficiency is 37-40%, the accelerated life test exceeds 1000 hours, the technical problems that an existing electrode is low in catalytic efficiency and poor in stability in the high-salt environment are solved, and technical support is provided for stable operation of a zero-emission system.

A method for separating indium oxide and tin oxide from an ITO waste target by a vacuum method disclosed by the present disclosure, which relate to the field of resource recycling and utilization technology. The method Includes: take ITO waste target raw material, add indium to the ITO waste target raw material, heat and hold under vacuum conditions, then the Indium oxide is obtained by the volatilization of the suboxide of indium into the volatile, and the tin oxide is obtained by remaining of the tin oxide in the condensate. The present disclosure is based on the fact that indium oxide can generate volatile suboxide (In2O) when heated in indium melt, and the generated suboxide can evaporate to the condensation zone for condensation, thereby achieving the separation of indium oxide and tin oxide and achieving resource recovery and utilization of ITO waste target materials.

This invention discloses a pre-magnesium silicon suboxide anode material and its preparation method. The method involves mixing silicon suboxide powder, halide molten salt, and a magnesium source in a specific ratio, followed by heat treatment under a slightly positive pressure inert atmosphere. The acid washing process is precisely controlled to obtain a pre-magnesium silicon suboxide anode material with Mg₂SiO₄ as the absolute main phase. This method uses a molten salt with a lower melting point and addresses the issues of excessively high pre-magnesium temperatures and molten salt volatilization under vacuum conditions, resulting in a novel anode material that exhibits superior electrochemical performance.

The invention discloses a method for selectively precipitating and separating rubidium and cesium from a zinc hypoxide powder alkali wash solution, and belongs to the technical field of non-ferrous metallurgy, the method specifically comprises the following steps: adjusting the pH value of the zinc hypoxide powder alkali wash solution to 1-5, then adding a precipitant phosphotungstic acid into the zinc hypoxide powder alkali wash solution at 20-25 DEG C, mixing for 40-120 minutes to obtain a mixed solution, and carrying out solid-liquid separation to obtain the rubidium and cesium powder. A clarified solution I and a cesium-enriched product are obtained; adding phosphotungstic acid into the clarified liquor I at 40-80 DEG C, stirring and mixing for 90-240 minutes to obtain mixed liquor, and performing solid-liquid separation to obtain clarified liquor II and rubidium enrichment; according to the method disclosed by the invention, rubidium and cesium are separated and recovered step by step from the secondary zinc oxide powder alkali wash solution in a two-stage precipitation manner by taking phosphotungstic acid as a precipitator, and a high-content enriched product of rubidium and cesium is obtained, so that selective precipitation separation of rubidium and cesium in the secondary zinc oxide powder alkali wash solution can be realized; the method has the advantages of short process flow, simplicity in operation, low reagent consumption, high rubidium and cesium precipitation rate and the like.

This invention discloses a method for preparing a high-efficiency silicon suboxide anode material. First, metal powder and silicon suboxide material are mixed and ball-milled. The metal powder is then used to further reduce elemental silicon in the silicon oxide material, increasing the material's capacity. Next, carbon nanotubes are formed on the material surface using metal ion-induced chemical vapor deposition, improving the material's initial coulombic efficiency and cycle life. Then, a metal with better conductivity is doped into the material through a substitution reaction, further enhancing its capacity and conductivity. Finally, the high-efficiency silicon suboxide anode material is obtained through sintering. The silicon suboxide anode material prepared by this invention can effectively improve the initial coulombic efficiency and cycle life of batteries, and the process is simple and highly safe.

A glass-ceramic includes glass and crystalline phases, where the crystalline phase includes non-stoichiometric suboxides of titanium, forming ‘bronze’-type solid state defect structures in which vacancies are occupied with dopant cations.

The invention provides an inert electrode and a preparation method and application thereof, and an electrical device, and relates to the technical field of conductive ceramic coating materials, the inert electrode sequentially comprises a metal matrix, a diffusion barrier layer and a titanium black layer; the diffusion barrier layer comprises carbide and / or nitride of metal M; the metal M comprises any one or a combination of at least two of titanium, zirconium, hafnium, niobium, tantalum, chromium, molybdenum, tungsten or vanadium. The titanium black coating electrode containing the diffusion barrier has the advantages of being high in treatment efficiency, low in cell pressure, long in service life, capable of being produced on a large scale and the like.

This invention belongs to the field of environmental engineering technology, and provides a method for preparing a phosphorus-doped, high-curvature-controlled porous titanium suboxide electrode and its application in electrochemically enhancing the deep reduction of resistance genes in pharmaceutical wastewater. A high-curvature-tipped nanotube structure is prepared by electrochemical etching with NH4F. The increased electrochemically active surface area and the tip-enhanced electric field effect synergistically promote charge enrichment and electron accumulation, significantly improving the average current density of the system. P doping further optimizes the surface curvature of titanium suboxide, and lattice expansion is induced by controlling lattice tensile strain, reducing Ti orbital overlap to narrow the d-band and shift its energy level upward. The Ti content in the doped material... 3+ The ratio and oxygen vacancies increased significantly, enhancing the · The ability to generate OH, and increased 1 By leveraging the O2 generation rate and the characteristics of both free radicals, this invention achieves highly efficient and low-consumption electrocatalytic degradation of resistance genes and antibiotics in pharmaceutical wastewater. The electrode preparation process of this invention is simple, and the raw materials are inexpensive and readily available, making it suitable for large-scale production.

A type with N 3+ / P 3+ ‑Vacancy‑Ti 3+ The present invention relates to the preparation of titanium dioxide nanotube materials and their application in photoelectrocatalytic efficient degradation of organic pollutants. 2‑x Nanotube array process, using NH3 and PH3 as reducing agents, on TiO 2‑x Oxygen vacancies are formed in the lattice, and P is introduced 3+ and N 3+ , construct a 3+ / P 3+ ‑Vacancy‑Ti 3+ Structured photoanode. N 3+ / P 3+ ‑Vacancy‑Ti 3+ The structure can adjust the electronic structure of the material, broaden its spectral absorption range, and have visible light catalytic properties. 3+ / P 3+ With Ti 3+ An electron migration channel is formed between Ti and 3+ The site maintains a high catalytic activity +3 valence state, significantly enhancing its service life and effectively avoiding the traditional TiO 2‑x Ti in materials 3+ The sites are easily oxidized, leading to electrode inactivation.