69results about "Oxide/hydroxide preparation" patented technology

The invention relates to the field of nano materials and photonic crystal materials, in particular to nano particles, preparation of the nano particles and application of the nano particles in self-assembly of three-dimensional non-close-packed photonic crystals. The nanoparticles can be self-assembled into a three-dimensional non-close-packed photonic crystal in a concentration range of 1 wt%-60 wt%. According to the invention, the problem that the self-assembly of the three-dimensional non-close-packed colloid photonic crystal is difficult to realize at low concentration at present is solved. By adjusting the mass fraction of the particles in a solution, the three-dimensional non-close-packed colloidal photonic crystal with rich colors can be formed through self-assembly, and the three-dimensional non-close-packed colloidal photonic crystal has wide application prospects in the fields of sensing, display and the like.

A method for preparing a two-dimensional porous oxide belongs to the technical field of porous oxide preparation. The method includes the following steps: (1) using a metal salt as a precursor, an ion-intercalated two-dimensional oxide is prepared by a molten salt method; (2) the ion-intercalated two-dimensional oxide is mixed with a lithium initiator, reacted for a predetermined time, and then the unreacted lithium initiator is removed, filtered, and washed to obtain the two-dimensional porous oxide. The two-dimensional porous oxide prepared by this method forms uniform pores with a pore size range of 2-10 nm and a specific surface area of ​​200-300 m². 2 / g.

A product-activity-tunable method for calcining a carbonate mineral, relating to a method for calcining a carbonate mineral. In the present invention, two stages of reactions (i.e., a carbonate decomposition reaction and a product high-temperature sintering reaction) of a carbonate calcination process are separated in two reactors, i.e., a carbonate decomposition reactor and an activity tunning reactor, and the activity of products is flexibly regulated and controlled by respectively controlling the reaction conditions of the two reactors, thereby achieving co-production of multiple active products, and solving the problems of traditional production technologies, e.g., single product activity and limited product application. In addition, high-temperature flue gas from the activity tunning reactor is used as a heat source for the carbonate decomposition reactor, achieving efficient cascade utilization of energy in a system, and achieving significant energy saving and consumption reduction effects. In addition, the production process takes only a few seconds to a few minutes, the system processing capacity is high, and large-scale industrialization is easy to achieve.

A manufacturing apparatus (1A) includes a first gas introduction portion (20) provided on one end portion (10a) side of a calcination furnace (10) to introduce a gas into the calcination furnace (10), a gas discharge portion (30) provided on the other end portion (10b) side of the calcination furnace (10) to discharge the gas in the calcination furnace (10) to the outside, and a conveying apparatus (40) to convey a metal compound and a flux from the gas discharge portion (30) side to the first gas introduction portion (20) side. The calcination furnace (10) has a temperature increasing region (12A), a cooling region (14A), and a reaction region (13A) provided between the temperature increasing region (12A) and the cooling region (14A) and causing the metal compound and the flux to react. In the manufacturing apparatus (1A), a gas flow (AF1) generated by the gas introduced from the first gas introduction portion (20) causes the flux gasified in the reaction region (13A) to be powdered in the cooling region (14A), and the gas containing the powdered flux is sent to the gas discharge portion (30).

The application discloses a method for inducing low-temperature hydrorefining of carbonates by mechanical chemical pretreatment. The method is specifically operated as follows: carbonate powder and grinding balls are loaded into a ball mill tank for ball milling under normal temperature and pressure air condition; and after mechanical chemical treatment for 2-16 hours, completely amorphous carbonates are obtained; and then the treated carbonates are pyrolyzed at 450-550 DEG C in a pure hydrogen atmosphere, so that metal oxides and synthesis gas without CO2 are prepared. The long-range ordered crystal structure of the carbonates is amorphized and in-situ modulated by the mechanical chemical method, which is favorable for reducing the energy barrier of the carbonates hydrogenation reaction, improving the self-catalytic reaction efficiency, reducing the reaction temperature and the required time, realizing complete inhibition of CO2 generation at low temperature, effectively reducing the CO2 emission in the process, and simultaneously obtaining high-purity synthesis gas without CO2 and high-purity metal oxide products.

A process for preparing metal oxide comprising (i) at least one metal chosen from nickel and cobalt and optionally (ii) at least one metal chosen from manganese, lithium and aluminum. The process comprising:reacting a metal sulfate comprising (i) at least one metal chosen from nickel and cobalt and optionally (ii) at least one metal chosen from manganese, lithium and aluminum with lithium hydroxide and optionally a chelating agent to obtain a solid comprising a metal hydroxide comprising (i) at least one metal chosen from nickel and cobalt and optionally (ii) at least one metal chosen from manganese, lithium and aluminum, and a liquid comprising lithium sulfate, the metal sulfate comprising (i) at least one metal chosen from nickel and cobalt and optionally (ii) at least one metal chosen from manganese, lithium and aluminum;separating the liquid and the solid from one another to obtain the metal hydroxide;submitting the liquid comprising lithium sulfate to an electromembrane process for converting the lithium sulfate into lithium hydroxide; andreusing at least a first portion of said lithium hydroxide obtained by the electromembrane process for reacting with the metal sulfate;reacting at least a second portion of said lithium hydroxide obtained by the electromembrane process with the obtained metal hydroxide to obtain a mixture of metal hydroxides; androasting said mixture of metal hydroxides to obtain the metal oxide.

To provide an inorganic oxide powder having smaller charging amount difference between that under a high-temperature high-humidity condition and that under a low-temperature low-humidity condition.SOLUTION: A surface-modified inorganic oxide powder is a powder comprising composite particles involving inorganic oxide particles and a coating formed on the particle surfaces, in which (1) the coating involves a hydrophobicity imparting agent and a nonionic surfactant and (2) the powder has a hydrophobicity rate of 40% or over.SELECTED DRAWING: None

The application discloses a reduced graphene oxide loaded high-entropy oxide and a preparation method and application thereof, and relates to the technical field of high-entropy oxides. The preparation method comprises the following steps: ultrasonic treatment is conducted on graphene and metal salt respectively in respective solvents to obtain a metal salt solution and a graphene suspension; the metal salt solution is added into the graphene suspension, urea is added and stirred, and then the obtained mixed solution is pretreated to obtain a precursor powder; and the precursor powder is subjected to plasma flow treatment to obtain the reduced graphene oxide loaded high-entropy oxide. The high-entropy oxide obtained by using the preparation method has the advantages of polycrystal face scattering, excellent impedance matching and strong wave absorption loss capacity, and has a wide application prospect in the electromagnetic field of consumer electronics, new energy vehicles and military weapons.

One object of the present invention is to provide a burner for producing inorganic spheroidized particles which can efficiently melt and spheroidize even organic powder with a large particle size distribution. The present invention provides a burner for producing inorganic spheroidized particles, including; a raw material powder supply path configured to supply inorganic powder as raw material powder; a first fuel gas supply path (3A) configured to supply a first fuel gas; and a first combustion-supporting gas supply path (4A) configured to supply a first combustion-supporting gas; wherein the raw material powder supply path includes: a first supply path (2A) configured to extend in an axial direction of the burner (1); a first collision wall (2D) configured to be located at the top of the first supply path (2A); a plurality of second supply paths (2B) configured to be branched from the top of the first supply path (2A), and extend radially from the center of the burner (1); one or more dispersion chambers (2C) configured to be located at the top of the second supply path (2B), and have a space in which the cross-sectional area is larger than the cross-sectional area in the second supply path (2B); and one or more raw material ejection holes (2a) configured to communicate with the dispersion chamber (2C).

The present application relates to a kind of spray pyrolysis device system and the method for synthesizing metal oxide, the device system includes pyrolysis reaction unit, dust collection unit and flue gas recovery unit connected in order along material flow direction;The pyrolysis reaction unit includes automatic feeding device, carrier compression device, atomizing device and pyrolysis device connected in order along material flow direction, and the side wall bottom of the pyrolysis device is connected with combustion device.The present application can ensure that the actual decomposition temperature and residence time of raw material are accurately controlled by setting automatic feeding device, while using reasonable feeding and pyrolysis process parameters;Metal oxide and flue gas can be efficiently separated by using dust collection unit, high-purity metal oxide preparation can be realized, and it can be used for industrial scale production.

This application discloses a composite material, its preparation method, a light-emitting device, and a display device. The composite material has a core-shell structure, wherein the core of the composite material comprises metal oxide nanoparticles, and the shell of the composite material comprises Zn. z M x (PO4) y Where M is selected from H or one or more metallic elements, 0≤x / z≤0.5, 3y=2z+ax, a is the valence of M, x, y, z are integers or decimals, and the Zn z M x (PO4) y It is an amorphous material. In the technical solution proposed in this application, a zinc phosphate-based amorphous material shell is coated on the surface of the metal oxide, which can passivate surface defects of the metal oxide.

The present invention relates to the technical field of spherical oxide fillers and provides a method for simultaneously producing nano- and submicron-sized spherical oxide fillers. In this invention, an oxide raw material (raw material O) is combined with a metal or non-metal raw material (raw material M), thereby reducing the reactivity of the raw material and reducing the risk of uncontrollable dust explosions, thereby achieving safe production. At the same time, raw material O is vaporized under high-temperature conditions to form nano-sized particles, or is dispersed into nano-sized particles by the shock waves generated by deflagration. Raw material M reacts with oxygen in an oxygen-rich environment, forming submicron-sized particles through aggregation and cooling. The resulting product particles are cooled in an oxygen-rich environment and then subjected to a fine separation step, thereby simultaneously obtaining submicron-sized and nano-sized spherical oxide fillers. Furthermore, in this invention, after the temperature in the reactor stabilizes, fuel gas consumption can be minimized, thereby stabilizing the temperature in the reactor and reducing costs.

The application discloses a method for preparing nano-oxide powder by solid-phase hot injection, and utilizes inorganic metal salt and organic ligand to prepare metal-organic complex as metal precursor; under inert atmosphere, a synthesis solvent is heated, then the metal precursor is directly added in solid form, heat preservation reaction is carried out, and the organic ligand is recovered; the polar solvent is added into the mixed solution after heat preservation reaction, solid-liquid separation is carried out to obtain solid-phase product and liquid-phase mixed solvent; the nano-oxide powder is obtained by calcining the solid-phase product, and the synthesis solvent and the polar solvent are recovered by separating the liquid-phase mixed solvent. By the solid-phase hot injection, the same amount of synthesis solvent can be converted into more precursor to corresponding high-quality nano-particles without incomplete nucleation or particle agglomeration, the recovery rate of the organic ligand can be adjusted by selecting the synthesis solvent, and the synthesis solvent and the polar solvent in the solution after reaction are recycled.

The invention discloses a hollow nanoscale transition metal oxide electrocatalyst as well as a preparation method and application thereof, and belongs to the field of electrocatalysts. According to the invention, a metal organic framework (MOF) is used as a self-sacrifice template, and then annealing and reduction treatment are carried out to obtain the hollow nanoscale transition metal oxide electrocatalyst with rich oxygen vacancies on the surface; according to the method, the catalytic performance of the transition metal oxide as the electrocatalyst is effectively improved, the preparation process is simple, the designed reaction conditions are mild, and large-scale application and popularization are facilitated.

Methods and apparatuses for converting metal carbonate salts to metal hydroxides are disclosed. The methods involve electrochemical production of hydrogen ions (H+) for decarbonating the metal carbonate salt to generate metal ions in a chemical compartment of the electrochemical cell. The metal ions are transported to a cathode compartment where they combine with hydroxide (OH-) to form metal hydroxides. The methods and apparatus may be applied to produce calcium hydroxide which may be used as a precursor for cement clinker. In some embodiments electrochemically produced hydrogen and oxygen are burned to produce heat for production of cement clinker.

The invention discloses a preparation method of a composite material, the composite material, a photoelectric device and electronic equipment. The preparation method of the composite material comprises the following steps: providing a mixture comprising a first metal oxide and a photoacid generator; and performing illumination treatment on the mixture to obtain the composite material, the photoacid generator in the mixture is subjected to a dissociation reaction through illumination treatment to form sulfonic acid, the sulfonic acid is easily combined at the anion defect position of the first metal oxide, and-OH in the sulfonic acid can fill the anion defect, so that the number of defect states of the first metal oxide is reduced, and the defect state of the first metal oxide is reduced. And fluorine atoms in the sulfonic acid can enter crystal lattices of the first metal oxide to replace part of oxygen atoms, so that the electron transmission efficiency of the composite material is improved, and the composite material has good stability and conductivity.

Described herein are compositions and methods of making and use thereof. For example, disclosed herein are methods of making a composition, the method comprising sol-gel synthesis, the composition comprising Na(z)[Na(x)Ni(y)M(1-x-y)]O2, where 0.5 ≤ z ≤ 0.8; 0 ≤ x ≤ 1 / 3; 0 ≤ y ≤ 1; and M is a 3d or 4d transition-metal, Al, Sn, Sb, Te, or a combination thereof; where z, x, y, and M are selected such that the composition is charge balanced.

The invention discloses a method for preparing a high-added-value product through non-thermal plasma coupling carbonate reduction. According to the method, the decomposition temperature is reduced to 25-550 DEG C from 600 DEG C or above through synergistic catalysis of the plasma and the catalyst, carbonate hydrogenation reduction is carried out under normal pressure, so that preparation of high-added-value products is achieved, meanwhile, reduction of energy consumption and equipment maintenance, operation and safety cost in the whole process is facilitated, and high economic benefits and environmental benefits are achieved. In addition, the catalyst contains a dielectric component with a high dielectric constant, so that uniform and concentrated discharge of plasmas is facilitated, and the carbonate reduction conversion efficiency and the energy utilization efficiency are improved.

To provide a spray thermal decomposition device capable of removing nitrogen oxide, without large cost.SOLUTION: A spray thermal decomposition device 10 comprises: a first spray device 3 for spraying mist 2 of a raw material solution into a thermal decomposition furnace 1; one or more combustion burners 4 for thermally decomposing the mist 2 by a combustion gas; and a second spray device 6 for spraying mist 5 of a denitration agent. The combustion burner 4 is arranged so that the combustion gas generates a swirling flow, and the second spray device 6 is installed so as to spray the mist of the denitration agent along a flow direction of the combustion gas or against the flow direction.SELECTED DRAWING: Figure 1

The invention discloses a method for synthesizing powder nano oxide by transient pulse heating, which comprises the following steps of: (1) uniformly mixing one heat-sensitive metal salt or at least two heat-sensitive metal salts to obtain a reaction precursor; (2) loading the reaction precursor obtained in the step (1) into a heating matrix with thermal conductivity or electrical conductivity; (3) performing pulse heating under the atmosphere condition; and (4) naturally cooling to obtain the nano oxide powder. Compared with a traditional solid-phase reaction method, a hydrothermal method and the like, the method provided by the invention has the advantages of short reaction time, low energy consumption, simple equipment, good product dispersity and the like, is suitable for large-scale preparation of high-performance nano materials in the fields of catalysis, energy, electronics, environmental protection and the like, and has a better application prospect.

The invention relates to an oxygen vacancy modified metal oxide material and a preparation method and application thereof, and the method comprises the following steps: placing a metal oxide in a strong reducing agent solution in an inert atmosphere environment for standing, after the reduction reaction is finished, removing redundant liquid on the upper layer, then adding a cleaning agent, stirring for a period of time, and then standing, so as to obtain the oxygen vacancy modified metal oxide material. Removing redundant liquid on the upper layer in the container; repeating the step for repeated cleaning for multiple times until the residual strong reducing agent on the surface of the oxide is cleaned; and collecting the metal oxide material, and carrying out vacuum drying to obtain the oxygen vacancy modified metal oxide material. The oxygen vacancy modified metal oxide material is applied to the field of energy storage. The method is simple in step, normal in temperature and pressure, low in cost, high in universality and capable of achieving large-scale production, and more importantly, the oxygen vacancy concentration of the metal oxide material can be accurately regulated and controlled by adjusting the reaction time and the raw material ratio; the prepared oxygen vacancy modified metal oxide material can be applied to the field of energy storage.

The present invention addresses the problem of newly providing a method for synthesizing a non-layered colloidal single-crystalline oxide nanosheet. Provided is a method for synthesizing a non-layered colloidal single-crystalline oxide nanosheet.

To provide an oxide particle that has controlled color characteristics and can be stably supplied with a low energy and a low resource consumption, and a method for producing the oxide particle.SOLUTION: Provided is a silicon compound-coated oxide particle in which at least part of a surface of an oxide particle thereof is coated with a silicon compound. An oxide which constitutes the oxide particle is an iron oxide. The silicon compound can change color characteristics of the oxide particle by coating at least part of the surface of the oxide particle. A M-OH bond / M-O bond ratio of the oxide particle is 1% or more and 30% or less. An average reflectance of the oxide particle to a light beam in the wavelength of 780 nm to 2,500 nm is 50% or more.SELECTED DRAWING: Figure 1

Disclosed are high-entropy oxides, and methods of their preparation. The high- entropy oxide is characterised by a sub-micron particle size and rod-like particle shape. The method of its preparation includes a co-precipitation step, preferably using an oxalate compound as a precipitating agent. Also disclosed are an electrode, e.g. an anode, a catalyst and an electrochemical cell comprising the high-entropy oxide.

The present disclosure broadly relates to a method of preparing a supported high-entropy oxide nanostructure The method may comprise the step of: irradiating, with a laser, a substrate coated with a hydrogel to form the high-entropy oxide nanostructure, wherein the hydrogel comprises at least five metal salts, a cross-linking agent, a carbonaceous substance and water to form a high-entropy oxide nanostructure. There is also disclosed herein a high- entropy oxide nanostructure produced by the method as well as the use of the high-entropy oxide nanostructure for forming hydrogen.

A circulating fluidized bed (CFB) furnace (3) for heating and / or calcination of a material, wherein a hydrogen-enriched gas mixture (1) is used as fuel for the calcination process is disclosed. A process for calcination of a material, wherein a hydrogen-enriched gas mixture (1) is used as fuel for the calcination process is further disclosed.

The application discloses a modification method of micro-nano oxide powder, and belongs to the technical field of powder material modification. The method comprises the following steps: adding the micro-nano oxide powder into a mixed solution of a hydrophobic modifier and water, uniformly stirring and mixing to form an oxide slurry; after curing the mixed oxide slurry at a certain temperature, separating and drying to obtain a hydrophobic modified micro-nano oxide powder; and adding the obtained hydrophobic modified micro-nano oxide powder into a mixed solution of a hydrophilic modifier and water to prepare a micro-nano oxide powder with internal hydrophobicity and external hydrophilicity. The micro-nano oxide powder is modified twice on the surface by adjusting the micro-nano oxide powder modifier and ratio, curing temperature and time, and selecting a drying mode, so that the micro-nano oxide powder with internal hydrophobicity and external hydrophilicity is obtained. The modification method is simple and efficient, and the modified micro-nano oxide powder has uniform particle size and outstanding modification effect.

Provided is a metal oxide for a cathode active material of a lithium secondary battery capable of having improved structural and thermal stability, high efficiency, high capacity, and excellent cycle property and life span property, the metal oxide represented by the following Chemical Formula 1:         [Chemical Formula 1]     LiaNixCoyMzO2 (in Chemical Formula 1, M is any one selected from aluminum, magnesium, titanium, gallium and indium, and a, x, y and z satisfy 1.01≤a≤1.05, 0.7≤x≤0.9, 0≤y≤0.17, 0.02≤z≤0.16, and x+y+z=1, respectively).

Porous metal oxide microspheres are prepared by a method comprising forming a liquid solution or dispersion of polydisperse polymer nanoparticles and metal oxide; forming liquid microdroplets from the solution or dispersion; drying the liquid microdroplets to provide polymer template microspheres comprising polymer nanospheres and metal oxide; and removing the polymer nanospheres from the template microspheres to provide porous metal oxide microspheres. The porous microspheres exhibit saturated colors and are suitable as colorants for various end uses.