20 results about "Antimonate" patented technology

The invention discloses a method and a device for deeply purifying an arsenic solution and preparing high-purity arsenic oxide. The method comprises the following steps: oxidizing antimony impurities in an arsenic solution, precipitating, deeply removing, adding a reducing agent to reduce pentavalent arsenic in the solution into trivalent arsenic, decomposing, evaporating, cooling and crystallizing to obtain the high-purity arsenic trioxide. Wherein oxidation precipitation is carried out in a purification tank, reduction is carried out in a reduction tank, the purification tank and the reduction tank are located in the same box body and are separated by a filter screen and a partition plate in the middle, precipitated arsenic antimonate generated after purification in the purification tank is intercepted through the filter screen, and filtrate enters the reduction tank; during reaction, the partition plate is started for use to prevent the solution from flowing. The filtrate enters a reduction tank, reducing agents such as sulfur dioxide are introduced, pentavalent arsenic in the solution is further reduced to form trivalent arsenic, and a high-purity arsenic trioxide product (As2O3 is larger than or equal to 99.5%, and Sb is smaller than or equal to 0.05%) is prepared.

This invention discloses a supported manganese antimonate ultra-low temperature sulfur- and water-resistant denitrification catalyst and its preparation method. The preparation method includes: step (1) dissolving manganese salt and antimony precursor in deionized water to prepare a mixed salt solution, stirring and mixing evenly at room temperature, adding urea solution as a precipitant, then adding activated carbon and stirring and mixing evenly to obtain a hydrothermal precursor slurry; step (2) transferring the hydrothermal precursor slurry to a reactor for hydrothermal treatment, and after multiple centrifugation, washing and filtration, drying and grinding the obtained solid to obtain carbon-supported precursor powder; step (3) calcining the carbon-supported precursor powder in an inert atmosphere in a reactor, and obtaining the supported manganese antimonate denitrification catalyst after natural cooling. According to the preparation method of the supported manganese antimonate ultra-low temperature sulfur- and water-resistant denitrification catalyst of this invention, the obtained catalyst has good sulfur poisoning resistance and high N2 selectivity.

The invention relates to the technical field of preparation of inorganic chemical materials, and discloses a controlled synthesis process of a high-temperature-resistant sodium antimonate crystal structure, which comprises the following steps: dispersing antimony trioxide in a sodium hydroxide aqueous solution with the initial concentration of 6.5-8.0 mol / L, and adding sodium metaaluminate as a lattice directing agent to prepare a precursor base solution; heating the base solution, maintaining turbulent stirring, executing double-flow-path synchronous compensation, dropwise adding a hydrogen peroxide aqueous solution and synchronously adding sodium hydroxide; the method comprises the following steps: dynamically setting a coupling relationship among an alkali supplementing rate, an oxidation rate and a reaction stoichiometric ratio, counteracting a dilution effect of water generated by reaction and solvent water in real time, and maintaining the concentration of free sodium hydroxide in a mother solution in the whole reaction process at 6.0 mol / L or above until a reaction endpoint is reached. The path of lattice interstitial water or surface hydroxyl is blocked, anhydrous sodium antimonate without crystal water removal steps in the whole temperature range is prepared, and the foaming problem in high-temperature processing is solved.

The invention discloses aluminum ion co-doped antimonic acid-based deep infrared fluorescent powder as well as a preparation method and application thereof. The chemical formula of the fluorescent powder is LaLiSb.xO: 0.002 Mn, xAl, and x is more than 0 and less than or equal to 0.005. The preparation method comprises the following steps: mixing compound raw materials of lanthanum, lithium, antimony, manganese and aluminum according to the molar ratio of metal elements by adopting a high-temperature solid-phase method, carrying out ball milling, and roasting at 1000-1200 DEG C, thereby obtaining the lanthanum-lithium-antimony-manganese-aluminum composite material. The fluorescent powder disclosed by the invention can emit deep infrared light of which the center is 717 nm under the excitation of blue light or purple light. By introducing Al to partially replace Sb, the light-emitting quantum efficiency and thermal stability of the material are effectively improved. The highest quantum efficiency can reach 29.51%, and the thermal quenching temperature T.is increased to 520 K. The fluorescent powder can be combined with a blue light or purple light LED chip to prepare a deep infrared LED device for plant growth illumination.

The invention discloses various low-cost zinc antimonate-based conductive powder and a preparation method thereof, Zn and Sb elements rich in earth crust are used as raw materials, the forbidden band width, the carrier concentration and the mobility of the raw materials are regulated and controlled through doping modification, the high-purity conductive powder is prepared by combining a co-precipitation method and a low-temperature sintering process, and the chemical formula of the high-purity conductive powder is Zn0. 92In0. 08Sb2O6, Zn0. 92Ge0. 08Sb2O6, Zn0. 92Al0. 08Sb2O6 or Zn0. 92Sn0. 08Sb2O6. The method has the advantages of simple equipment, low cost, easiness in control of doping concentration and the like.

The invention belongs to the technical field of piezoelectric ceramics, and particularly relates to a lead manganese antimonate-lead indium niobate-lead zirconate titanate piezoelectric ceramic material and a method. The chemical general formula of the material composition is as follows: 0.05 Pb (Mn < 1 / 3 > Sb < 2 / 3 >)] O < 3-0.92 > Pb (Zr < x > Ti < 1-x >)] O < 3-0.03 > Pb (In < 1 / 3 > Nb < 2 / 3 >)] O < 3 + y wt% Cu < O > and z wt% Fe < 2 > O < 3 >, wherein x is equal to 0.5 to 0.6, y is equal to 0.05 to 2, and z is equal to 0.05 to 3. The piezoelectric ceramic material is prepared from the following raw materials: Pb3O4, TiO2, ZrO2, MnO2, Nb2O5, In2O3, Sb2O3, CuO and Fe2O3. The piezoelectric ceramic has relatively high piezoelectric property d33 and also has relatively high mechanical quality factor.

A dopant complex is disclosed. The dopant complex may be formed of a dopant ion component encapsulated in a polymer matrix, wherein the dopant ion component is a metal triflate, a metal halide, a metal antimonate, or any combination thereof, and the polymer matrix comprises or consists of a hydroxyl-containing polymer. Further is disclosed an electronic component and the use of the dopant complex.

The invention relates to the technical field of inorganic fine chemical engineering, and discloses a synthesis method of a superfine sodium antimonate flame retardant for engineering plastics, which comprises the following steps: dissolving antimony trioxide, adding sodium gluconate, and stirring at a constant temperature of 43-47 DEG C to prepare a coordination equilibrium precursor solution; pumping the precursor solution and the hydrogen peroxide solution into a three-stage pipeline type high-shear dispersion machine, and controlling the gap between a stator and a rotor to be 0.2-0.3 mm and the rotating speed to be 4000-4500 rpm for reaction; according to the preparation method disclosed by the invention, a chemical coordination potential barrier is constructed by virtue of constant-temperature aging so as to delay a reaction induction period, coordination equilibrium is broken by virtue of mechanical energy dissipation of a high-shear field, nucleation is instantaneously initiated, and the problem that an oxidation reaction rate is mismatched with a micro-mixing rate is solved; the narrowing of the particle size distribution and the regularization of the morphology of the product are realized.

Dopant complexes are disclosed. The dopant complexes can be formed from a dopant ion component encapsulated in a polymer matrix, wherein the dopant ion component is a metal triflate, a metal halide, a metal antimonate, or any combination thereof, and the polymer matrix comprises or consists of a hydroxyl-containing polymer. Electronic assemblies and uses of the dopant complexes are also disclosed.

The present application relates to a kind of crystalline cobalt antimonate coating titanium electrode and its preparation method.The electrode active coating component is crystalline CoSb2O6, and Co and Sb element are uniformly distributed in active coating.The electrode is without noble metal such as Ru and Ir, and cost is far lower than classic TiO2-RuO2 coating titanium electrode.The electrode can achieve good chlorine evolution activity under low chloride ion concentration, and chlorine evolution activity is slightly lower than TiO2-RuO2 electrode, and service life is superior to TiO2-RuO2 electrode.In the field of on-site electrochemical treatment of wastewater, it has wide application prospect.The present application also provides the preparation method of cobalt antimonate coating titanium electrode, precursor solution is prepared by ethylene glycol-citric acid sol-gel method, electrode is coated by dip-coating plating film method, and finally electrode is prepared by thermal decomposition method.The present application is simple in process, low in cost, and suitable for large-scale production.

The application relates to the technical field of nanometer material preparation, in particular to a manganese antimonate nanometer material and a preparation method thereof. A manganese salt solution, an antimony salt solution and a complexing agent solution are mixed, and then pH is adjusted to obtain a precursor solution; the precursor solution is mixed with a soft film edition agent, and then stirring and heating are carried out to form a sol, and the sol is subjected to standing and drying to obtain a dry gel; the dry gel is subjected to one-stage heat treatment in an air or oxygen atmosphere, and then cooling and grinding are carried out after the one-stage heat treatment, and then two-stage heat treatment is carried out after the grinding to obtain the manganese antimonate nanometer material. The manganese antimonate nanometer material with high purity and high performance is prepared by controlling solution chemistry, gelation conditions and heat treatment parameters. The product has high purity, good crystal form, simple preparation mode, high operability and high repeatability. The product is suitable for the fields of magnetic materials, catalysts, battery materials and the like, and has wide industrial application prospects.

The invention discloses a FeS / Fe2O3 coated LDH material, a preparation method and application of the FeS / Fe2O3 coated LDH material in removal of antimonate in water, and the preparation method comprises the following steps: mixing a sodium sulfide solution and a ferrous sulfate solution at normal temperature and normal pressure, reacting to generate FeS / Fe2O3 precipitate, and soaking the FeS / Fe2O3 precipitate in a nitrate solution at normal temperature and normal pressure for modification to obtain the ferrous sulfide / Fe2O3 coated LDH material. The invention aims to provide a FeS / Fe2O3-coated LDH material, a preparation method and application of the FeS / Fe2O3-coated LDH material in removal of antimonate in water. The FeS / Fe2O3-coated LDH material can be prepared at normal temperature and normal pressure, has controllable morphology, has efficient removal capacity on antimonate and can be repeatedly used.

The invention discloses an antimonate near-infrared luminescent material and a preparation method thereof. The chemical expression of the luminescent material is YGd (Sc1-x-yGay) SbO7: xCr < 3 + >, in the formula, x is equal to 0.003-0.1, and y is equal to 0-0.97. The preparation method comprises the following steps: weighing the corresponding raw materials of yttrium oxide, gadolinium oxide, scandium oxide, gallium oxide, antimony oxide and chromium oxide according to the stoichiometric ratio of the chemical formula, then grinding and uniformly mixing the raw materials to obtain a mixture, putting the mixture into a crucible, sintering for 2-7 hours in a high-temperature furnace in an air atmosphere at 1100-1300 DEG C, and cooling to room temperature to obtain the yttrium oxide-gadolinium oxide-scandium oxide-gallium oxide-antimony oxide composite material. And cooling to room temperature to obtain the antimonate near-infrared luminescent material. The obtained antimonate near-infrared luminescent material emits near-infrared light under the excitation of a blue light chip, and the emission peak value is near 760 nm. The luminescent material is good in dispersity, uniform in granularity, good in chemical stability and high in luminous efficiency, an excitation band of the luminescent material covers purple and blue light regions, and the luminescent material can be used as a near-infrared luminescent material for a blue light LED.

The application provides a preparation method of a ferrous antimonate / diantimonium tetroxide / rGO composite material, uses +3 valence antimony as raw material, forms +5 valence antimony ions in a solvent thermal treatment, makes the +5 valence antimony ions form FeSbO4 / Sb2O4 heterojunction nanoparticles on the surface of reduced graphene oxide (rGO) sheets in situ by the action of +3 valence iron ions, and finally obtains the FeSbO4 / Sb2O4 / rGO composite material. The composite material can be used as a lithium / sodium ion battery negative electrode material, the unique FeSbO4 / Sb2O4 heterojunction nanoparticles and the excellent mechanical stability of rGO effectively alleviate the volume effect of the composite material in the cycle process, improve the conductivity of the electrode, and make the composite material have excellent electrochemical lithium / sodium storage performance.

This invention relates to the fields of inorganic chemical engineering and textile auxiliaries, and discloses a surface modification process for textile-grade sodium metaantimonate to improve dispersibility. The process includes: adding sodium aluminate to a sodium metaantimonate suspension and stirring until dissolved to create an alkaline liquid environment in which tetrahydroxyaluminate ions are stably present; adding an aqueous solution of phenylphosphonic acid dropwise to this alkaline system for acid-base neutralization, controlling the hydrolysis of aluminum species using the acid release rate, and inducing in-situ generated aluminum hydroxyl species to coordinate with phenylphosphonate ions. This invention constructs an antimony-oxygen-aluminum-oxygen-phosphorus chemical hybrid coating layer without a phase interface on the surface of sodium metaantimonate through a specific acid-base coupling synchronous mineralization mechanism. This kinetically blocks the self-condensation aging path of aluminum species, improves the interfacial bonding force and thermal stability of the modified layer under high temperature and high shear conditions, and effectively solves the problems of thermal desorption and secondary agglomeration of sodium metaantimonate during melt spinning.

The invention relates to the field of fluorescent materials in biomedicine and the like, and particularly discloses a rare earth doped strontium lutetium antimonate up-conversion luminescent material and a preparation method thereof, the material is Sr2Lu1-x-ySbO6: xEr < 3 + > and yYb < 3 + >, x is greater than or equal to 0.01 and less than or equal to 0.04, and y is greater than or equal to 0.05 and less than or equal to 0.35; the preparation method comprises the following steps: weighing strontium carbonate, lutetium oxide, erbium oxide, ytterbium oxide and antimony pentoxide according to a certain ratio as raw materials, adding a proper amount of absolute ethyl alcohol, fully stirring, drying, pressing into sheets, and sintering in a muffle furnace at 1350 DEG C for a period of time. The rare earth doped lutetium strontium antimonate up-conversion luminescent material has the beneficial effects that stronger green light is emitted, when erbium ions and ytterbium ions are at the optimal concentration, the novel luminescent material Sr2Lu0. 73SbO6: 0.02 Er < 3 + > and 0.25 Yb < 3 + > excites stronger green light at 526 nm, has a key effect in optical temperature sensing, and has a huge development prospect as a rare earth doped lutetium strontium antimonate up-conversion luminescent material.

The preparation method comprises the following steps: step (1), dissolving a manganese salt and an antimony precursor in deionized water to prepare a mixed salt solution, uniformly stirring and mixing at room temperature, adding a urea solution as a precipitant, stirring and mixing at room temperature, adding a sodium hydroxide solution as a precipitant, and stirring and mixing at room temperature to obtain a mixed solution; then adding activated carbon and uniformly stirring and mixing to obtain hydrothermal precursor slurry; (2) transferring the hydrothermal precursor slurry into a reaction kettle for hydrothermal treatment, centrifuging, washing and filtering for multiple times, and drying and grinding an obtained solid to obtain carbon-loaded precursor powder; and (3) calcining the carbon-loaded precursor powder in a reaction furnace in an inert atmosphere, and naturally cooling to obtain the loaded manganese antimonate denitration catalyst. According to the preparation method of the supported manganese antimonate ultralow-temperature sulfur-resistant and water-resistant denitration catalyst disclosed by the embodiment of the invention, the obtained catalyst is relatively good in sulfur poisoning resistance and relatively high in N2 selectivity.

This invention provides a method for preparing and applying an inorganic-organic mixed ammonium modified sandwich-type dinuclear uranium-tungsten-antimonate visible light photocatalyst. Belonging to the field of catalyst technology, the method for preparing an inorganic-organic mixed ammonium modified sandwich-type dinuclear uranium-tungsten-antimonate visible light photocatalyst includes the following steps: sodium tungstate dihydrate, ammonium chloride, tetramethylammonium bromide, antimony trichloride, and uranyl nitrate hexahydrate are sequentially added to a 100 mL beaker; 30-100 mL of deionized water is added to the beaker, and then... (The sentence is incomplete and requires further context to translate accurately.) ‑1 Adjust the pH of the solution with HCl solution to pH 2-5; after stirring the reaction solution in step S2 evenly, place it in a water bath and heat it at 60-100℃ for 3 hours; after taking out the reaction solution in step S3 and cooling it to room temperature, filter it and evaporate the filtrate in the open at room temperature.

The application relates to the technical field of inorganic chemical materials, and discloses a control synthesis process of a high-temperature-resistant sodium meta-antimonate crystal structure, which comprises the following steps: dispersing diantimony trioxide in a sodium hydroxide aqueous solution with an initial concentration of 6.5-8.0 mol / L, adding sodium meta-aluminate as a crystal lattice directing agent to prepare a precursor bottom solution; heating the bottom solution and maintaining turbulent stirring, performing double-flow path synchronous compensation, adding hydrogen peroxide aqueous solution drop by drop and synchronously adding sodium hydroxide; dynamically setting the coupling relationship of the alkali supplementing rate, the oxidation rate and the reaction stoichiometric ratio, and real-timely offsetting the dilution effect of reaction generated water and solvent water, so that the free sodium hydroxide concentration of the mother liquor in the whole reaction process is maintained to be above 6.0 mol / L until the reaction endpoint is reached; the application dynamically clamps the reaction boundary, blocks the path of the lattice gap water or the surface hydroxyl group, and prepares anhydrous sodium meta-antimonate without a crystallization water removal step in the whole temperature range, so that the foaming problem in high-temperature processing is solved.

This invention discloses a tungsten bronze type Bi 3+ / Zr 4+ A double-doped sodium silver strontium niobate lead-free ceramic material and its preparation method. The general structural formula of the ceramic material is (Sr 2‑x Bi x Ag 0.2 Na 0.8 (Nb) 4.8‑ x Zr x Sb 0.2 )O 15 Where x ranges from 0.03 to 0.15, the present invention prepares the material through batching, ball milling, pre-firing, secondary ball milling, sieving, pressing, and sintering. The preparation method of the present invention is simple, low-cost, highly reproducible, and has a high yield. The resulting ceramic material maintains high energy storage efficiency while achieving high energy storage density and high power density. When x = 0.05, its breakdown electric field reaches as high as 360 kV / cm, and the effective energy storage density is 3.61 J / cm³. 3 The current density can reach 1422.29 A / cm² at room temperature and an electric field strength of 220 kV / cm. 3 The power density is 159 MW / cm². 3 .