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32results about How to "Regular crystal structure" patented technology
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Lithium iron phosphate composite material coated with ternary carbon source and preparation method of material
ActiveCN103794760AImprove conductivitySolve the small diffusion coefficient of lithium ionsCell electrodesSecondary cellsReduction ActivityCarbonization
The invention provides a lithium iron phosphate composite material coated with a ternary carbon source and a preparation method of the material and belongs to the technical field of positive materials for lithium ion cells, aiming at the defects of poor conductivity and low tap density of lithium iron phosphate. The invention provides a modification method of the lithium iron phosphate composite material coated with the ternary carbon source according to the characteristics including pyrolysis characteristics, carbonization degrees, dispersion manners, residual carbon structures, reduction activity and the like of different carbon sources, based on a process and reaction process of preparing the lithium iron phosphate by using a carbon heat reduction method; micro-molecular water-soluble organic matters, high-molecular polymers, graphene compounds, iron source compounds, phosphorus source compounds and lithium source compounds are ball-grinded and homogenized and then are dried to prepare a composite precursor; then the composite precursor is sintered to obtain the lithium iron phosphate composite material. According to the lithium iron phosphate composite material coated with the ternary carbon source, the problems that the conductivity of the lithium iron phosphate composite material is low, the lithium ion diffusion coefficient is low, the tap density is low, and the like are solved.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Catalyst for straight-run naphtha aromatization and preparation method thereof
InactiveCN106552663ARegular skeleton structureFast responseMolecular sieve catalystsHigher alkanesNaphtha
The invention discloses a catalyst for straight-run naphtha aromatization and a preparation method thereof. The catalyst for straight-run naphtha aromatization is prepared by modifying a nano ZSM-5 molecular sieve, preparing a carrier and preparing the catalyst. The catalyst is suitable for treating raw materials with high alkane content. And the catalyst has high catalytic activity and high arene selectivity. So the catalyst can be applied to more mild process conditions and can be applied to production of high-octane gasoline blending components and chemical raw materials like benzene, toluene, xylene, etc.
Owner:PETROCHINA CO LTD
ZnIn2S4 photocatalyst obtained by hydrothermal synthesis of ionic liquid microemulsion and preparation method of ZnIn2S4 photocatalyst
InactiveCN104477972ALarger than surfaceUniform shapePhysical/chemical process catalystsGallium/indium/thallium compoundsIndiumIonic liquid
The invention discloses a preparation method of a ZnIn2S4 photocatalyst by hydrothermal synthesis of ionic liquid microemulsion. The preparation method comprises the following steps: (1) adding a sulfur source into the ionic liquid and a surfactant, heating, and stirring until the sulfur source is dissolved to obtain a mixture A; (2) fully dissolving a divalent zinc salt and a trivalent indium salt in deionized water to obtain a mixture B; (3) transferring and mixing the mixture A and the mixture B in an autoclave having polytetrafluoroethylene lining and uniformly stirring; (4) closing the autoclave, placing the autoclave at 50-90 DEG C and reacting for 4-24 hours and naturally cooling at room temperature to obtain a yellow precipitate; and (5) respectively washing the yellow precipitate with deionized water and anhydrous ethanol, transferring to a drying oven and drying overnight at 40-90 DEG C to obtain the final product. The preparation process is simple, rich in raw materials and low in cost, and the product has the advantages of large specific surface area, high catalytic activity and high hydrogen generation efficiency.
Owner:SOUTH CHINA UNIV OF TECH
High-energy-storage-density strontium-sodium-niobate-base glass ceramic energy storage material, and preparation and application thereof
InactiveCN105645772ASimple structureImproved breakdown fieldFixed capacitor dielectricHigh energyGlass sheet
The invention relates to a high-energy-storage-density strontium-sodium-niobate-base glass ceramic energy storage material, and preparation and application thereof. The strontium-sodium-niobate-base glass ceramic energy storage material comprises SrO, Na2O, Nb2O5 and SiO2 in a mole ratio of 42x:42(1-x):28:30. The preparation method comprises the following steps: weighing the raw materials, mixing by ball milling, drying, and carrying out high-temperature melting to obtain a high-temperature melt; and casting the high-temperature melt into a preheated metal mold, carrying out stress-relief annealing to obtain transparent glass, cutting the transparent glass into glass sheets with the thickness of 0.9-1.2mm, and carrying out controlled crystallization to obtain the product. The product is applicable to an energy storage capacitor material. Compared with the prior art, the preparation method provided by the invention is simple, does not need complicated after-treatment steps, and is economical and practical. The prepared glass ceramic energy storage material has higher breakdown field strength resistance (2402kV / cm), and the energy storage density of the material is obviously enhanced to 16.86J / cm<3>. The strontium-sodium-niobate-base glass ceramic energy storage material is applicable to an energy storage capacitor material.
Owner:TONGJI UNIV
Carbonizer and method for producing nano calcium carbonate
ActiveCN102531017AImprove product qualityUniform particle size distributionCalcium/strontium/barium carbonatesNanotechnologyCalcium hydroxideCarbonization
The invention discloses a carbonizer for producing nano calcium carbonate. The carbonizer comprises a calcium hydroxide blending tank, a calcium hydroxide slurry storage tank, a primary carbonization nucleation reactor, a primary carbonization growth reactor, a primary carbonization ageing tank, a secondary carbonization tubular reactor and a calcium hydroxide activating tank; and a slurry carbonization reaction tube and a carbon dioxide porous reaction tube which have two-end uninterrupted repeated arch structures are arranged in the primary carbonization nucleation reactor, the primary carbonization growth reactor and the secondary carbonization tubular reactor respectively. By the method for producing the nano calcium carbonate through the carbonizer, the calcium carbonate can be produced by the nucleation stage and the growth stage, and is controlled stepwise, the reaction degree of the whole carbonization process can be monitored, the nano calcium carbonate with uniform particle size distribution, regular crystal structures and stable quality can be produced, and the invention has the advantages of small equipment investment, short carbonization time, low energy consumption and the like.
Owner:连州市凯恩斯纳米材料有限公司
Preparation method of silver powder with low heat shrinkage rate
ActiveCN111790918AReduce burning lossHigh crystallinityTransportation and packagingMetal-working apparatusActive agentHigh energy
The invention provides a preparation method of silver powder with low heat shrinkage rate. The preparation method comprises the steps that a silver nitrate water solution and a reducing agent solutionare simultaneously added into a dispersing agent water solution to obtain silver powder particles, then after the surface of the silver powder is coated with a surfactant, the silver powder particlesproduce mutual impact, collision and friction shearing by jet stream, so as to achieve the surface smoothness and dispersion treatment of the silver powder, finally a high-energy pulse current is utilized to provide high energy in a very short time to promote the recrystallization of the silver powder in a faster way at a lower temperature, the crystal defects of the silver powder is improved, and the silver powder particles are prevented from agglomerating. The heat shrinkage rate of the prepared silver powder is less than 5% at 700 DEG C, good degree of sphericity and dispersity are achieved, the particle size D100 is not more than 5 [mu]m, the tap density is not less than 4 g / cm<3>, and a broad application prospect in the field of miniaturization and high-reliability circuits is achieved.
Owner:西安宏星电子浆料科技股份有限公司
Silicon-based substrate, substrate base plate and manufacturing method thereof, and photoelectric device
InactiveCN111146320AImprove yield rateAchieve self-annihilationPolycrystalline material growthSemiconductor/solid-state device manufacturingLattice mismatchCrystal structure
The invention relates to a silicon-based substrate, a substrate base plate and a manufacturing method thereof, and a photoelectric device, and relates to the field of electronic technology application. The substrate base plate comprises: a silicon-based substrate, wherein one surface of the silicon-based substrate is provided with periodic convex structures, and inclination angles are formed at the side surfaces and the bottom surfaces of each convex structure; and an III-V material layer arranged on one surface, having the convex structure, of the silicon-based substrate. According to the invention, in the substrate base plate, one surface of the silicon-based substrate is not a silicon (100) crystal surface any more and is a periodic convex structure, the self-annihilation of dislocationcan be realized by the convex structure, and dislocation caused by lattice mismatch and a reversed phase domain is limited on the silicon-based substrate layer, so that the neat crystal structure canbe kept when the III-V material epitaxially grows on the silicon-based substrate so as to reduce the problems of lattice mismatch, inverse domain and the like between the silicon-based substrate andthe III-V material and improve the yield of the III-V material on the silicon-based substrate; and the method is used for forming the high-quality III-V material on the silicon-based substrate.
Owner:HUAWEI TECH CO LTD +1
Semiconductor device and forming method thereof
ActiveCN105336793AAvoid overdiffusionImprove performanceSemiconductor/solid-state device manufacturingSemiconductor devicesElectrical conductorCondensed matter physics
The invention discloses a semiconductor device and a forming method thereof. The forming method comprises the steps as follows: a substrate is provided; a sacrificial layer is formed on the surface of the substrate; an opening for exposing partial surface of the substrate is formed in the sacrificial layer; a barrier layer is formed at the bottom of the opening; a first semiconductor layer is formed on the surface of the barrier layer and is doped with first ions; a first doped region is formed at the bottom of the first semiconductor layer; the first semiconductor layer is doped with second ions; a second doped region is formed at the top of the first doped region; the second ions and the first ions are different in conductive type; after the first doped region and the second doped region are formed, the sacrificial layer is removed and the surface of the substrate is exposed; after the sacrificial layer is removed, a second semiconductor layer is formed on the surface of the substrate and is doped with the first ions; and a source region and a drain region are formed at two sides of the first doped region and the second doped region respectively. The performance of the formed semiconductor device is improved.
Owner:SEMICON MFG INT (SHANGHAI) CORP
Lanthanum oxide doped strontium-barium niobate based glass ceramic energy storage material and preparation method thereof
InactiveCN105712634AImprove microstructureImprove machinabilityStrontium barium niobateMiniaturization
The invention relates to a lanthanum oxide doped strontium-barium niobate based glass ceramic energy storage material and a preparation method thereof. The preparation method includes: blending according to a molar ratio of 20BaCO3-20SrCO3-20Nb2O5-33.5SiO2-5Al2O3-1.5B2O3-xLa2O3; after barreling and mixing, drying, and melting at high temperature; quickly pouring high-temperature melt into a copper die for forming; destressing and annealing at certain temperature, cutting into glass sheets, and performing controlled crystallization to obtain the lanthanum oxide doped strontium-barium niobate based glass ceramic energy storage material. Compared with similar materials, the glass ceramic energy storage material has excellent machining performance, and can be mechanically ground and processed into sheets with thickness lower than 80 um, and convenience is brought to subsequent machining of small devices; the glass ceramic energy storage material has excellent dielectric performance and breakdown field strength resistance.
Owner:TONGJI UNIV
Preparation of ferrocenyl metal organic framework material and application of ferrocenyl metal organic framework material in water treatment
ActiveCN110615817AImprove adsorption capacityRegular crystal structureOther chemical processesOrganic chemistry methodsSolventMetal-organic framework
The invention discloses preparation of a ferrocenyl metal organic framework and application of the ferrocenyl metal organic framework in water treatment. The ferrocenyl metal organic framework is prepared by adopting zirconium acetate (Zr(OAc)4) and 1,1'-ferrocenedicarboxylic acid (Fc) as metal nodes and ligands, and under the condition that acetic acid is used as a regulator through a solvothermal method. The zirconium acetate and an organic ligand Fc are dissolved in a solvent, a monobasic acid regulator is added, a closed reaction is performed at 120 DEG C for 9 h, and after the reaction iscompleted, cooling, washing and drying are performed to obtain the material. The porous metal organic framework disclosed by the invention is applied to adsorption treatment of organic dye-Congo redin a water body as an efficient adsorbent; the maximum adsorption capacity can reach 249.2 mg / g, and the adsorption value of 50% of the maximum adsorption capacity can be maintained after the ferrocenyl metal organic framework is used for three times, which indicates that the adsorbent has very high adsorption efficiency and practical application value.
Owner:ZHEJIANG UNIV
Strontium barium niobate-based glass ceramic energy storage material and preparation method thereof
The invention relates to a strontium barium niobate-based glass ceramic energy storage material and a preparation method thereof. The strontium barium niobate-based glass ceramic energy storage material is prepared from BaCO3, SrCO3, Nb2O5, SiO2, Al2O3 and B2O3 in a molar ratio of 20:20:20:(30-35):5:(0-5). The preparation method of the strontium barium niobate-based glass ceramic energy storage material comprises the following steps: carrying out ball milling and mixing, drying, then melting at high temperature, rapidly pouring high-temperature melt into a copper mould to be moulded, then carrying out stress relief annealing, cutting into glass slices with the thickness of 1.5mm, and finally carrying out controlled crystallization, so that the strontium barium niobate-based glass ceramic energy storage material is obtained. Compared with similar materials, the strontium barium niobate-based glass ceramic energy storage material has excellent machining property and can be processed into slices with the thickness below 150Mum through mechanical polishing, thereby being convenient for follow-up processing of small devices; meanwhile, the strontium barium niobate-based glass ceramic energy storage material has excellent dielectric property and resistance to breakdown field strength, and energy storage density of the strontium barium niobate-based glass ceramic energy storage material can reach 7.4J / cm<3>.
Owner:TONGJI UNIV
Preparation method for micrometer barium-doped zinc oxide
InactiveCN102249284ASimple methodLow costZinc oxides/hydroxidesReaction temperatureTalc / Zinc Oxide
Provided is a preparation method for micrometer barium-doped zinc oxide. According to the method, barium-doped zinc oxide materials with three micrometer structures, namely, a clavate, a flower-like and a hexaprismatic double layer structure, are prepared with polyvinylpyrrolidoneK-30 as a template, zinc acetate dihydrate as a zinc source and barium chloride dihydrate as a structural modificationagent and doping agent by controlling the concentration of reactants, hydro-thermal growth time and reaction temperature. The micrometer barium-doped zinc oxide material prepared in the invention hasthe characteristics of high purity, a standardized crystal structure, good controllability in morphology and a short production period, and has a significant application prospect in fields like fuel cells, photoelectric conversion materials and chemical sensors.
Owner:SHAANXI NORMAL UNIV
Carbonizer and method for producing nano calcium carbonate
ActiveCN102531017BImprove product qualityUniform particle size distributionCalcium/strontium/barium carbonatesNanotechnologyCarbonizationSlurry
The invention discloses a carbonizer for producing nano calcium carbonate. The carbonizer comprises a calcium hydroxide blending tank, a calcium hydroxide slurry storage tank, a primary carbonization nucleation reactor, a primary carbonization growth reactor, a primary carbonization ageing tank, a secondary carbonization tubular reactor and a calcium hydroxide activating tank; and a slurry carbonization reaction tube and a carbon dioxide porous reaction tube which have two-end uninterrupted repeated arch structures are arranged in the primary carbonization nucleation reactor, the primary carbonization growth reactor and the secondary carbonization tubular reactor respectively. By the method for producing the nano calcium carbonate through the carbonizer, the calcium carbonate can be produced by the nucleation stage and the growth stage, and is controlled stepwise, the reaction degree of the whole carbonization process can be monitored, the nano calcium carbonate with uniform particle size distribution, regular crystal structures and stable quality can be produced, and the invention has the advantages of small equipment investment, short carbonization time, low energy consumption and the like.
Owner:连州市凯恩斯纳米材料有限公司
High-nickel ternary positive electrode material and preparation method thereof
InactiveCN112687868AMaintain spherical shapeHigh crystallinityCell electrodesSecondary cellsLithiumRoasting
The invention provides a high-nickel ternary positive electrode material and a preparation method thereof. The preparation method of the high-nickel ternary positive electrode material comprises the following steps of placing a high-nickel ternary precursor in a roasting furnace or a rotary kiln with a stirring function, carrying out low-temperature dehydration presintering while stirring is performed, and acquiring high-nickel ternary oxide; weighing a lithium source and a high-nickel ternary oxide according to a molar ratio of n (Li) / n (Ni+Co+Mn) of 1.03-1.20 respectively, and premixing to obtain a mixture; putting the mixture into the roasting furnace with the stirring function, and carrying out two-stage roasting while stirring; and washing, drying and secondarily sintering the roasted material to obtain the high-nickel ternary positive electrode material. According to the method, the original morphology of the high-nickel ternary precursor can be maintained, and the uniformity, the cycling stability and the rate capability of the high-nickel ternary positive electrode material are greatly improved.
Owner:DALIAN RONGKE ENERGY STORAGE GRP CO LTD
Lithium iron phosphate composite material coated with ternary carbon source and preparation method thereof
ActiveCN103794760BEvenly dispersedLow degree of graphitizationCell electrodesSecondary cellsReduction ActivityCarbonization
The invention provides a lithium iron phosphate composite material coated with a ternary carbon source and a preparation method of the material and belongs to the technical field of positive materials for lithium ion cells, aiming at the defects of poor conductivity and low tap density of lithium iron phosphate. The invention provides a modification method of the lithium iron phosphate composite material coated with the ternary carbon source according to the characteristics including pyrolysis characteristics, carbonization degrees, dispersion manners, residual carbon structures, reduction activity and the like of different carbon sources, based on a process and reaction process of preparing the lithium iron phosphate by using a carbon heat reduction method; micro-molecular water-soluble organic matters, high-molecular polymers, graphene compounds, iron source compounds, phosphorus source compounds and lithium source compounds are ball-grinded and homogenized and then are dried to prepare a composite precursor; then the composite precursor is sintered to obtain the lithium iron phosphate composite material. According to the lithium iron phosphate composite material coated with the ternary carbon source, the problems that the conductivity of the lithium iron phosphate composite material is low, the lithium ion diffusion coefficient is low, the tap density is low, and the like are solved.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Pure cobalt hydrotalcite compound and preparation method thereof
ActiveCN111792678ARegular crystal structureSimple preparation processMaterial nanotechnologyCobalt compoundsNitrateAlcohol
The invention relates to the technical field of preparation of hydrotalcite-like compounds, and discloses a pure cobalt hydrotalcite-like compound and a preparation method thereof. A constant pH precipitation method is adopted, cobalt nitrate serves as a cobalt source, a mixed solution of methyl alcohol and water (the volume ratio is 1: 1-8: 1) serves as a solvent, the cobalt nitrate solution is slowly dropwise added into a sodium carbonate solution at the room temperature, the pH of the solution is adjusted to be 8-12, and the pure cobalt hydrotalcite is obtained through the steps of hydrothermal aging, suction filtration, washing, drying and the like. The hydrotalcite-like compound is single in crystalline phase, regular in structure and good in layered structure and flaky morphology, the average thickness of nanosheets ranges from 5.9 nm to 12.8 nm, and the high crystallinity degree is achieved. The preparation process is simple and easy to operate, the raw materials are cheap and easy to obtain, the preparation conditions are mild, the period is short, the purity and the yield of the hydrotalcite-like compound are high, and quantitative synthesis can be realized.
Owner:FUZHOU UNIV
A kind of ionic liquid microemulsion thermal synthesis znin2s4 type photocatalyst and preparation method
InactiveCN104477972BLarger than surfaceUniform shapePhysical/chemical process catalystsGallium/indium/thallium compoundsActive agentSurface-active agents
The invention discloses a preparation method of a ZnIn2S4 photocatalyst by hydrothermal synthesis of ionic liquid microemulsion. The preparation method comprises the following steps: (1) adding a sulfur source into the ionic liquid and a surfactant, heating, and stirring until the sulfur source is dissolved to obtain a mixture A; (2) fully dissolving a divalent zinc salt and a trivalent indium salt in deionized water to obtain a mixture B; (3) transferring and mixing the mixture A and the mixture B in an autoclave having polytetrafluoroethylene lining and uniformly stirring; (4) closing the autoclave, placing the autoclave at 50-90 DEG C and reacting for 4-24 hours and naturally cooling at room temperature to obtain a yellow precipitate; and (5) respectively washing the yellow precipitate with deionized water and anhydrous ethanol, transferring to a drying oven and drying overnight at 40-90 DEG C to obtain the final product. The preparation process is simple, rich in raw materials and low in cost, and the product has the advantages of large specific surface area, high catalytic activity and high hydrogen generation efficiency.
Owner:SOUTH CHINA UNIV OF TECH
Preparation method of bimetallic oxide, bimetallic oxide and application
PendingCN113697839AImprove completenessIncrease the areaRare earth metal oxides/hydroxidesRare earth metal compounds preparation/treatmentCeriumSamarium
The invention relates to the technical field of metal oxides, in particular to a bimetallic oxide preparation method, a bimetallic oxide and application. The preparation method of the bimetallic oxide comprises the following steps: a, preparing a bimetallic solution in which the molar ratio of samarium to cerium is (0.9-1.1): 4; b, adding ammonia water into the bimetallic solution under stirring, and separating the generated co-precipitation product; and c, sequentially subjecting the co-precipitation product to drying, pre-calcination, calcination and cooling, wherein the calcination temperature ranges from 550 DEG C to 650 DEG C. By optimizing the treatment process of converting the precipitate into the metal oxide, the agglomeration of the material in the calcining process is avoided, and the crystal nuclei of the crystal grains are reduced, so that the grain size of the metal oxide crystal grains is reduced, the coarsening phenomenon of the metal oxide crystal grains is solved, and the specific surface area is increased.
Owner:ANSTEEL BEIJING RES INST
High energy storage density sodium strontium niobate based glass ceramic energy storage material and its preparation and application
InactiveCN105645772BSimple structureImproved breakdown fieldFixed capacitor dielectricHigh energyGlass sheet
The invention relates to a high-energy-storage-density strontium-sodium-niobate-base glass ceramic energy storage material, and preparation and application thereof. The strontium-sodium-niobate-base glass ceramic energy storage material comprises SrO, Na2O, Nb2O5 and SiO2 in a mole ratio of 42x:42(1-x):28:30. The preparation method comprises the following steps: weighing the raw materials, mixing by ball milling, drying, and carrying out high-temperature melting to obtain a high-temperature melt; and casting the high-temperature melt into a preheated metal mold, carrying out stress-relief annealing to obtain transparent glass, cutting the transparent glass into glass sheets with the thickness of 0.9-1.2mm, and carrying out controlled crystallization to obtain the product. The product is applicable to an energy storage capacitor material. Compared with the prior art, the preparation method provided by the invention is simple, does not need complicated after-treatment steps, and is economical and practical. The prepared glass ceramic energy storage material has higher breakdown field strength resistance (2402kV / cm), and the energy storage density of the material is obviously enhanced to 16.86J / cm<3>. The strontium-sodium-niobate-base glass ceramic energy storage material is applicable to an energy storage capacitor material.
Owner:TONGJI UNIV
A preparation method of catalytic cracking light gasoline aromatization catalyst
InactiveCN104399518BLarge outer surfaceRegular structureMolecular sieve catalystsOil processingNaphtha
The invention belongs to the technical field of petroleum processing, and relates to a method for preparing a catalytic cracking light gasoline aromatization catalyst; the preparation method of the catalyst mainly includes modification of nano ZSM-5 molecular sieves, preparation of a carrier, preparation of a catalyst, etc., and the prepared catalyst It can minimize the low-carbon olefins in catalytic cracking light gasoline and ensure that the octane number does not decrease or even increase. The present invention comprehensively considers the characteristics of reducing the content of low-carbon olefins to produce aromatization catalysts rich in aromatics, the activity, selectivity and stability of the prepared catalyst are well distributed, the experimental operation is simple, and the process can be changed in a wide range condition.
Owner:SHENYANG POLYTECHNIC UNIV
A kind of pure cobalt hydrotalcite compound and preparation method thereof
ActiveCN111792678BRegular crystal structureSimple preparation processMaterial nanotechnologyCobalt compoundsMethanol waterPhysical chemistry
The invention relates to the technical field of preparation of hydrotalcite-like compounds, and discloses a pure cobalt-like hydrotalcite compound and a preparation method thereof. Using the constant pH precipitation method, using cobalt nitrate as the cobalt source, methanol-water (volume ratio 1:1–8:1) mixed solution as the solvent, slowly add the cobalt nitrate solution to the sodium carbonate solution at room temperature and adjust the pH of the solution =8–12, after hydrothermal aging, suction filtration, washing, drying and other steps, pure cobalt-based hydrotalcites can be obtained. The hydrotalcite-like crystal phase is single, the structure is regular, and it presents a good layered structure and sheet morphology. The average thickness of the nanosheets is 5.9-12.8 nm, and it has a high degree of crystallinity. The preparation process of the invention is simple and easy to operate, the raw materials are cheap and easy to obtain, the preparation conditions are mild, the cycle is short, the purity and yield of the hydrotalcite-like stone are high, and the quantitative synthesis can be realized.
Owner:FUZHOU UNIV
A kind of vanadium phosphorus oxide and preparation method thereof
ActiveCN104607221BSmall grain sizeRegular structurePhysical/chemical process catalystsOrganic chemistryOctahedronVanadium oxide
Owner:CHINA PETROLEUM & CHEM CORP +1
Method for extracting cellulose from tobacco waste based on reductant-oxidant
ActiveCN102733219BHigh crystallinityRegular crystal structurePaper material treatmentCelluloseDissolution reaction
The invention relates to a chemical extraction method of agricultural waste, particularly a method for extracting cellulose from tobacco waste based on a reductant-oxidant, comprising the following steps: crushing the dried tobacco waste, putting the crushed waste in water to immerse for no less than 6 h to obtain a pretreatment liquid; carrying out solid-liquid separation on the pretreatment liquid and taking the solids, adding a reductant-oxidant solution having the volume of 3-150 times of the volume of the tobacco waste and having the volume percentage of no less than 3%, reacting for at least 15min at 20-90 DEG C to obtain a reaction solution, carrying out solid-liquid separation on the reaction solution, and taking the filter residues, wherein the filter residues are cellulose. The method has the advantages of simple process, energy saving and environmental protection. Compared with the methods for processing tobacco cellulose by traditional acid, alkali activation treatment and other physicochemical treatment, the production cost can be greatly reduced.
Owner:CHONGQING HENGYUAN JINTONG TECH
mo-eu co-doped titanium dioxide/aluminum phosphate molecular sieve composite photocatalyst and its application
ActiveCN112473733BSmall particle sizeHigh catalytic efficiencyWater treatment parameter controlMolecular sieve catalystsPtru catalystMicrosphere
The invention discloses a Mo-Eu co-doped titanium dioxide / aluminum phosphate molecular sieve composite photocatalyst. The aluminum phosphate molecular sieve is used as a carrier, and the Mo-Eu co-doped titanium dioxide nano-microsphere is used as an active component. The preparation method includes the following steps. : prepare the nano-microsphere active ingredient of Mo-Eu co-doped titanium dioxide; mix ionic liquid, phosphoric acid, aluminum source, organic amine, and hydrofluoric acid evenly; mix the Mo-Eu co-doped titanium dioxide nano-microsphere prepared in step S1 The spherical active ingredient is added to the mixed solution in step S2, and the mass fraction ratio of each substance in the mixture is: ionic liquid: phosphoric acid: aluminum source: organic amine: hydrofluoric acid: Mo-Eu co-doped titanium dioxide nano-microsphere activity Composition=10‑12:2‑3:1:5‑6:0.5‑0.8:0.3‑0.5; the mixture was crystallized at 350‑400℃ for 30‑50min; centrifuged, washed, dried, and calcined. The Mo-Eu co-doped titanium dioxide / aluminum phosphate molecular sieve composite photocatalyst provided by the invention can efficiently degrade the pollutants of printing and dyeing wastewater under the action of visible light, and the catalyst usage amount is small.
Owner:GUIZHOU RES INST OF CHEM IND
Lanthanum oxide doped strontium barium niobate based glass ceramic energy storage material and preparation method thereof
The invention relates to a lanthanum oxide doped strontium-barium niobate based glass ceramic energy storage material and a preparation method thereof. The preparation method includes: blending according to a molar ratio of 20BaCO3-20SrCO3-20Nb2O5-33.5SiO2-5Al2O3-1.5B2O3-xLa2O3; after barreling and mixing, drying, and melting at high temperature; quickly pouring high-temperature melt into a copper die for forming; destressing and annealing at certain temperature, cutting into glass sheets, and performing controlled crystallization to obtain the lanthanum oxide doped strontium-barium niobate based glass ceramic energy storage material. Compared with similar materials, the glass ceramic energy storage material has excellent machining performance, and can be mechanically ground and processed into sheets with thickness lower than 80 um, and convenience is brought to subsequent machining of small devices; the glass ceramic energy storage material has excellent dielectric performance and breakdown field strength resistance.
Owner:TONGJI UNIV
Insulating oxidation-resistant plastic-coated pipe and preparation method thereof
InactiveCN113388310AHigh mechanical strengthImprove toughnessAnti-corrosive paintsPolyether coatingsHexafluorideAcyl group
The invention discloses an insulating oxidation-resistant plastic-coated pipe and a preparation method thereof, and relates to the technical field of new materials. The preparation method comprises the specific steps of reacting 2-[4-(3a, 7a-dihydro-3H-indole-2-ethyl) phenyl]-3H-indole with 2-diphthalic anhydride-1, 3-propane hexafluoride, and modifying by using a rare earth solution so as to obtain a polyimide liquid crystal; reacting the prepared perfluorinated succinic anhydride with sodium peroxide, and purifying so as to prepare perfluorinated acyl peroxide; catalyzing by using a sodium hydroxide solution, initiating bisphenol A and epoxy chloropropane to polymerize by using perfluoroacyl peroxide, and then adding polyimide liquid crystal to prepare fluorinated epoxy resin; and carrying out thermal spraying on the pretreated stainless steel pipe by using aliphatic amine polyether, fluorinated epoxy resin, polyimide liquid crystal and a mixed additive, and curing to obtain the insulating oxidation-resistant plastic-coated pipe. The plastic-coated pipe prepared by the preparation method disclosed by the invention has relatively high insulating property and oxidation resistance, and also has extremely excellent toughness.
Owner:陈凡
Preparation method for nitrogen-rich ZMOF type metal-organic framework porous material
ActiveCN102921377BRegular crystal structureUniform pore size distributionOther chemical processesBy adsorptionCo2 absorptionBiological activation
The present invention provides a preparation method for a novel nitrogen-rich ZMOF type metal-organic framework porous material. According to the preparation method, an azole-rich compound is adopted as a reaction ligand, and the azole-rich compound and a Zn<2+>-containing soluble zinc salt are subjected to a solvothermal reaction in an organic solvent to obtain a nitrogen-rich ZMOF type metal-organic framework porous material; and then washing, evacuation and high temperature activation are performed to remove the organic solvent from the nitrogen-rich ZMOF type metal-organic framework porous material. The nitrogen-rich ZMOF type metal-organic framework porous material prepared by the method has characteristics of regular crystal structure, uniform pore size distribution, good physical and chemical stability, and excellent selective CO2 absorption capacity, such that the method has good application prospects in technical fields of CO2 capture separation, organic molecule separation, and the like.
Owner:NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
A kind of preparation method of silver powder with low heat shrinkage
ActiveCN111790918BReduce burning lossHigh crystallinityTransportation and packagingMetal-working apparatusHigh energyActive agent
The invention provides a method for preparing silver powder with low thermal shrinkage rate. Silver powder particles are obtained by adding silver nitrate aqueous solution and reducing agent solution to dispersant aqueous solution at the same time. Mutual impact, collision, friction and shearing are used to smooth and disperse the surface of the silver powder. Finally, the high-energy pulse current is used to provide high energy in a very short time, which promotes the recrystallization of the silver powder at a lower temperature and in a faster way, improving the silver powder. Crystal defects and no agglomeration of silver powder particles. The thermal shrinkage rate of the silver powder prepared by the present invention is not more than 5% at 700°C, and has good sphericity and dispersibility, the particle size D100 is not greater than 5 μm, and the tap density is not less than 4g / cm 3 , has broad application prospects in the field of miniaturized and high-reliability circuits.
Owner:西安宏星电子浆料科技股份有限公司
A kind of vanadium-phosphorus-oxygen catalyst for butane oxidation to maleic anhydride and preparation method thereof
ActiveCN104607219BHigh reactivityEvenly distributedOrganic chemistryPhysical/chemical process catalystsCatalytic oxidationBiological activation
The invention discloses a vanadium phosphorus oxygen catalyst and a preparation method thereof. The nano-vanadium phosphorus oxide is used as a precursor, and it is obtained by first activating and then forming or first forming and then activating; the grain size of the nano-vanadium phosphorus oxide is less than 100nm, and its grain size distribution is as follows based on volume, The proportion of <15nm particles is 9-15%, the proportion of 15-30nm particles is 62-80%, and the proportion of 30-100nm particles is 11-23%. The nano-vanadium phosphorus oxide is prepared by adding a silane coupling agent in a submerged circulating impingement flow reactor. The catalyst of the invention is used in the catalytic reaction of n-butane oxidation to prepare maleic anhydride, the conversion rate of n-butane can reach 90-95 mol%, and the selectivity of maleic anhydride can reach 75-88 mol%.
Owner:CHINA PETROLEUM & CHEM CORP +1
Organic electroluminescent device and preparation method
InactiveCN104009162AIncrease scatteringImprove stabilitySolid-state devicesSemiconductor/solid-state device manufacturingSilicon monoxideHole injection layer
The invention discloses an organic electroluminescent device which comprises a glass substrate, an anode layer, a hole injection layer, a hole transport layer, a luminescent layer, an electron transport layer, an electron injection layer and a cathode which are successively laminated. The material of the hole injection layer is a mixed material formed by silicon oxide and praseodymium dioxide, praseodymium oxide, samarium oxide or diytterbium ioxide. The silicon oxide is silicon monoxide or silicon dioxide. As work function of praseodymium dioxide, praseodymium oxide, samarium oxide or diytterbium ioxide in the material of the hole injection layer is high, it is suitable for hole injection. After being contacted with the anode, the hole injection layer matches barrier of the anode, thus making the hole easier to inject into the hole layer from the anode. The silicon oxide is stable, and stability of the device can be raised after the silicon oxide is doped to the hole injection layer. Meanwhile, scattering of light can be further raised by the silicon oxide, and the total reflection effect of the device can be reduced. The invention also discloses a preparation method of the organic electroluminescent device.
Owner:OCEANS KING LIGHTING SCI&TECH CO LTD +2
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