205results about "Zinc oxides/hydroxides" patented technology

The invention discloses a method for green synthesis of a zinc oxide nanosheet from an aerospace mutant strain PS04-17. The invention provides a new application of a space mutant strain PS04-17 in green synthesis of zinc oxide nanosheets, research shows that the PS04-17 strain has efficient capability of converting zinc nitrate hexahydrate into zinc oxide nanosheets, the conversion efficiency is high, the generated zinc oxide nanosheets are flat and smooth in surface and clear in edge, the sheet structure is presented, and the zinc oxide nanosheets have good application prospects. And orderly vertical or staggered folding is realized. The zinc oxide nanosheets are synthesized through the aerospace mutant strain PS04-17, more possibilities are provided for a green and innovative synthesis method, more feasible schemes are provided for synthesis of nano-zinc oxide through a microbiological method, and the synthesis method is efficient, simple, convenient, safe, low in cost, environmentally friendly and suitable for industrial production. The prepared zinc oxide nanosheet can be better applied to the fields of agriculture, industry, medical treatment and the like.

The invention relates to a preparation method of a pectin-derived carbon-coated amorphous tin-zinc composite oxide lithium ion battery negative electrode material. The method comprises the following steps: dropwise adding a tin tetrachloride solution and an acidified zinc oxide solution into a pectin solution to obtain a metal ion-pectin dispersion liquid; adding ammonia water to obtain a pectin precursor solution; freezing and solidifying with liquid nitrogen; and after freeze-drying, roasting for 3-5 hours to obtain the pectin derived carbon coated amorphous tin-zinc composite oxide lithium ion battery negative electrode material. The reversible specific capacity of the obtained composite material reaches 1339 mA h g <-1 > after 100 cycles under the current density of 0.2 A g <-1 >.

The invention discloses a preparation method of a lanthanum ferrite / zinc oxide composite material, which comprises the following steps: preparing lanthanum ferrite LFO, ultrasonically stirring ferric nitrate nonahydrate, lanthanum nitrate hexahydrate and a dispersing agent in a hydrothermal solvent to obtain a mixed solution, preparing an LFO / ZnO composite material, dispersing the LFO prepared in the step S1 and zinc acetate in ethanol, performing ultrasonic treatment, heating and stirring, and condensing and refluxing to obtain the LFO / ZnO composite material. Cooling, and continuously stirring in an ice-water bath; dropwise adding a NaOH ethanol solution at the temperature of 0 DEG C, and stirring for 2 hours; adding deionized water, stirring, centrifuging to remove the supernatant, dispersing the precipitate powder in ethanol, and carrying out hydrothermal reaction; after the hydrothermal reaction is finished, centrifuging the solution, and after centrifugation is finished, pouring out the solution to obtain a precipitate; washing with deionized water and an ethanol solution, drying the precipitate, and calcining the dried powder in a muffle furnace to obtain a p-n type LFO / ZnO composite material; according to the method, the size of lanthanum ferrite can be accurately regulated and controlled through a cooperative regulation strategy of the solvent proportion and the ligand size, and different types of gases can be accurately distinguished.

The invention discloses an electromagnetic wave absorbing material CoFe2O4 / ZnO-RGO with a ternary heterostructure as well as a preparation method and application of the electromagnetic wave absorbing material CoFe2O4 / ZnO-RGO, and belongs to the technical field of electromagnetic wave absorption. According to the material, a novel heterostructure with a multi-scale interface and a three-dimensional conductive network is constructed by compounding magnetic loss type CoFe2O4, dielectric loss type ZnO nanorods and resistance loss type RGO. Wherein the ZnO nanorod not only serves as a dielectric loss body, but also effectively enhances the structural anisotropy and the interface polarization effect of the material, and cooperates with the magnetic loss of CoFe2O4 and the resistance loss of RGO to jointly optimize impedance matching and improve the electromagnetic attenuation capability, so that the material shows excellent wave-absorbing performance under various thickness and even ultrathin conditions. The material source is wide, the cost is low, the preparation process is green, simple and convenient, the material is suitable for large-scale production, and an effective material solution is provided for electromagnetic wave absorption application in the national defense and civil fields.

The application discloses a zinc extraction process from secondary zinc oxide, and belongs to the technical field of zinc oxide preparation. In the rotary kiln roasting, composite porous flaky reducing carbon with waste paper, rice husk and wooden chips as main raw materials is used as a reducing agent. Compared with the commercially available anthracite, the composite porous flaky reducing carbon has low cost, realizes resource recycling, and has a large specific surface area and porous properties. A multi-level structure of flaky layers and pores is constructed, so that the contact sites of the composite porous flaky reducing carbon and the secondary zinc oxide are increased. The porous structure can avoid the caking of the material layer caused by the stacking and agglomeration of the flaky layers, and avoid the obstruction of gas flow, so that the pain points of the traditional reducing agent, such as local agglomeration and insufficient contact, are solved. The surface of the composite porous flaky reducing carbon is deposited with calcium oxide. The presence of the calcium oxide can react with a small amount of sulfur elements generated in the rotary kiln roasting process of the composite porous flaky reducing carbon, so as to generate calcium sulfate and reduce the content of sulfur dioxide.

The invention discloses an AgBr-loaded ZnO material, a preparation method of the AgBr-loaded ZnO material and an isopropanol sensor. The method comprises the following steps: firstly, dissolving glucose and urea in deionized water, uniformly stirring, and then adding a zinc source; carrying out hydrothermal reaction on the obtained solution, and firing a product to obtain a ZnO material; and dispersing a proper amount of ZnO powder into deionized water, sequentially adding a bromine source solution and a silver source solution, stirring, collecting a product, washing, and drying to obtain the AgBr-loaded ZnO material. According to the method, the concentration of oxygen adsorbed on the surface of ZnO is remarkably improved by utilizing the overflow effect of noble metal Ag and photoelectron transfer between AgBr and ZnO, so that the chemical reaction between the oxygen and isopropanol is promoted. The prepared AgBr-loaded ZnO material has the characteristics of high sensitivity, rapid response, low detection lower limit, good selectivity and the like for isopropanol gas at a relatively low working temperature.

Low temperature synthesis, growth and doping methods and resulting materials are disclosed. According to an aspect, a method for material transformation includes providing a target material comprising carbon and / or hydrocarbon. The method also includes placing the target material within a fluid comprising a hydrogen source. Further, the method includes applying energy to the target material such that at least some of the target material is transformed to the same material with new beneficial bonding configuration.

The invention discloses a preparation method of graphene super-energy zinc oxide, and relates to the technical field of inorganic synthesis and nano material preparation. Comprising the steps of hydrothermal synthesis in a polar solvent system, wet precipitation, ultrasonic treatment and high-temperature roasting and ball milling. A comb-shaped functional additive is matched with an auxiliary agent to regulate and control a solvent environment, and ZnO with controllable morphology such as hexagonal prism / nanorod / nanowire is generated under a hydrothermal condition. And mixing the graphene with calcium carbonate and graphene to obtain the graphene super-energy zinc oxide. The rubber composition has excellent processability in the processing process, can effectively improve the production efficiency and ensure the stability of the product quality, and is suitable for producing and processing various rubber products, such as tires, rubber tubes, adhesive tapes, rubber shoes and the like.

Tin tetrachloride pentahydrate, zinc nitrate hexahydrate and dimethylimidazole are used as raw materials, methanol is used as a solvent, and the tin-zinc bimetallic oxide, which is named Sn-Zn-O for short, is obtained through stirring, centrifugal drying and calcining; the material is an n-type semiconductor, and the chemical composition of the material is SnO2 and ZnO. The microstructure of Sn-Zn-O is a nano microsphere, and the particle size range of the Sn-Zn-O is 100-250 nm. The invention relates to a preparation method of a hydrogen sensor based on Sn-Zn-O, namely when the Sn-Zn-O is used as the hydrogen sensor, the optimal working temperature is 180 DEG C, the response value is 112 when the hydrogen concentration is 1000 ppm, the response time is 1.29 s, and the recovery time is 147 s. When the hydrogen concentration range is 0.1-2000ppm, the hydrogen sensor has different responses to hydrogen with different concentrations, and the lowest hydrogen concentration is detected to be 0.1 ppm.

The invention discloses a method for realizing degradation of polyalkylene oxide compounds and controllable molecular weight through a promoter, which comprises the following steps: adding a photodegradation promoter into a high-molecular-weight polyalkylene oxide product, adjusting the proportion of the promoter and the proportion of effective components, and accurately controlling the shear molecular weight under the irradiation of an ozone emitter, so that the molecular weight of the polyalkylene oxide compounds is controllable. According to the invention, polyalkylene oxide with different molecular weights of 30,000-3,000,000 is prepared by using the photodegradation cocatalyst, so that the photodegradation cocatalyst can meet the requirements of customers in different fields, and meanwhile, the photodegradation cocatalyst prepared by the invention can be recycled to achieve the benefits of reducing cost and improving efficiency.

Disclosed are methods of forming a method for forming spectrally selective nanoparticles, the method comprising: heating a growth solution comprising a zinc salt precursor, zinc oxide seed particles, and one or more dopants in a non-pressurized hydrothermal reactor to a first temperature under agitative conditions for a reaction period; cooling the reactor to a second temperature less than the first temperature for a cooling period to form a precipitate of recrystallized doped zinc oxide nanoparticles dispersed in a suspension; and separating and collecting the recrystallized nanoparticles from the suspension, wherein the collected nanoparticles exhibit a spectral selectivity in the atmospheric window.Also disclosed herein are comprising a population of polycrystalline zinc oxide nanoparticles doped with one or more dopants, wherein the population of nanoparticles is spectrally selective in the atmospheric window.

This invention relates to an atomic-level manufacturing method and apparatus for two-dimensional metal oxide nanosheets based on controllable micro-explosion, belonging to the field of functional nanomaterials and atomic-level precision manufacturing technology. This invention uses transition metal energetic complexes and energetic oxygen compounds as metal-oxygen integrated precursors. Under the constraint of an array-type nano-confined microcavity, controllable micro-explosions are synchronously triggered by nanosecond lasers to achieve nanosecond-level stoichiometric precision in the directional self-assembly of two-dimensional metal oxide nanosheets. The preparation cycle of this invention is reduced to less than 10 minutes, and the overall energy consumption is less than 1% of that of the traditional hydrothermal method. The product has excellent specific surface area, photocatalytic and cycling performance, and is 100% compatible with existing mass production lines. It is suitable for large-scale manufacturing in fields such as photocatalysis, energy storage, gas sensors, and environmental governance.

The invention relates to a metal hydroxide for a heat storage system and a green preparation method and application thereof. The green preparation method of the metal hydroxide, provided by the invention, comprises the following steps: dissolving metal acetate in water, and preparing a metal acetate aqueous solution with the metal ion concentration of 0.01-1mol / L; placing the metal acetate aqueous solution in an open container, and carrying out evaporation concentration treatment at 30-95 DEG C for 1-96 hours to generate a metal hydroxide precipitate; and carrying out solid-liquid separation on the metal hydroxide precipitate, washing and drying to obtain the metal hydroxide. The method does not need to add an alkaline agent or an organic auxiliary agent, avoids generation of by-products of salts and high-salt waste liquid, and accords with 12 principles of green chemistry; reaction conditions are mild, the process is simple, operation can be carried out at normal temperature and normal pressure, energy consumption is low, and safety is high; the raw material conversion rate is high, mother liquor can be recycled, and high-atom-economy and low-cost production is achieved.

A system for the synthesis of zinc oxide nanoparticles (ZnO-NPs) comprising the steps of preparing an aqueous extract from Annona muricata leaves, adding the extract to an aqueous solution of zinc acetate dihydrate, adjusting the pH to approximately 8 with sodium hydroxide, stirring and heating the mixture at approximately 70 °C, and collecting and drying the resulting ZnO nanoparticles.

The invention relates to a multi-metal element nano-aluminum adjuvant and a preparation method and application thereof, the nano-aluminum adjuvant is a nano-particle containing an aluminum element and at least one metal element selected from magnesium, zinc and calcium, the nano-particle has a layered crystal structure, and the particle size is distributed in a range of 20-2000 nm. The difunctional nano-aluminum adjuvant has the beneficial effects that the difunctional nano-aluminum adjuvant is simple and convenient in preparation method, definite in component and uniform in particle size, the particle size of the particles can be manually regulated and controlled, and the difunctional nano-aluminum adjuvant can directly promote antigen presenting cells to be mature and activated and carry out MHC-I or II type antigen presentation.

The application discloses a method for synthesizing high-catalysis and high-antibacterial-activity nano ZnO multi-level structure material, and belongs to the field of preparation of nano inorganic materials. The application provides a new method for preparing nano ZnO multi-level structure material with different morphologies in a one-step method by using ethylene glycol and an organic solvent as mixed solvents at normal pressure and in a low temperature range, and high-activity bowl-shaped multi-level structure of nano ZnO self-assembled is obtained in a simple system for the first time, without additional additives or strong alkali, so that the convenient, controllable and green synthesis of high-activity nano ZnO multi-level structure is realized. The prepared nano ZnO multi-level structure material has the performance of photocatalytic degradation of organic dyes and excellent antibacterial performance.

This invention discloses the preparation of feed-grade high specific surface area nano-zinc oxide and its application in piglets. It is prepared using crude zinc oxide as raw material through processes such as ammonia leaching, ammonia stripping, and calcination. The feed-grade high specific surface area nano-zinc oxide prepared by this method has a specific surface area >60 μm². 2 The product has a ZnO content >95%, a particle size <100nm, an average particle size of 50-100nm, and harmful element content <10mg / kg (lead, arsenic, and cadmium). Compared with ordinary nano zinc oxide (OZO), it exhibits better stability in simulated piglet gastrointestinal fluid, better antibacterial activity against Escherichia coli K88, Staphylococcus aureus, and Salmonella typhimurium, and less toxicity to the pig small intestinal epithelial cell line IPEC-J2. It can also significantly reduce cell apoptosis and the production of intracellular reactive oxygen species. Adding 150mg / kg to the diet of piglets in the first two weeks after weaning has shown good results in reducing diarrhea in weaned piglets, increasing the average daily weight gain of piglets, and reducing the feed conversion ratio.

The invention relates to the field of solid-state batteries, in particular to a halide electrolyte, a preparation method thereof and a solid-state battery. The chemical formula of the halide electrolyte is (1-n) Li < 1.4 > Al < 1.4 > Zr < 0.1 > OCl < 4 >. N > LiNbOCl < 4 > (at) x AlF < 3 > (at) y ZnO, nlt; 0 < = x < = 0.3, and 0 < = y < = 0.3. Wherein Li < 1.4 > Al < 1.4 > Zr < 0.1 > OCl < 4 > has good viscoelasticity and plasticity, and can show excellent interface mechanical compatibility under relatively low external pressure; the LiNbOCl4 can be used for improving the ionic conductivity of the electrolyte; alF3 has oxidation-resistant potential and is used for improving the oxidation-resistant potential of the halide electrolyte; znO has excellent air stability and is used for increasing the air stability of the halide electrolyte.

A method for synthesizing melamine polymer modified zinc oxide nanoparticles is provided. In the method, polymer grafted zinc oxide nanoparticles are provided, and melamine is grafted onto the polymer grafted zinc oxide nanoparticles by adding melamine in the presence of a carboxy group activating reagent to the polymer grafted zinc oxide nanoparticles to form the melamine polymer modified zinc oxide nanoparticles. A method of corrosion inhibition in a wellbore by applying the melamine polymer modified zinc oxide nanoparticles is also provided. Further provided are zinc oxide nanoparticles comprising a melamine polymer of the following formula bonded to oxygen atoms are provided.

The invention discloses equipment for preparing rubber-grade zinc oxide through continuous surface modification. The equipment comprises a PLC intelligent control unit, a raw material adding unit and a gas-solid separation unit, and a discharging unit is arranged at one end of the gas-solid separation unit; a modification main machine is arranged at one end of the raw material adding unit, the raw material adding unit is located at the bottom of the modification main machine, and a modifier preheating and conveying unit is further arranged at the bottom of the modification main machine; the invention relates to the technical field of zinc oxide surface modification equipment, and has the beneficial effects that a plurality of groups of grinding disc bodies and extended path disc bodies are combined with an inner gear ring and a check ring of a grinding stator structure in a modification main machine to form a multi-stage continuous shearing dispersion action; and the flowing extension path of the powder and the modifier in the modification main machine is prolonged, so that the powder and the modifier are fully collided and adsorbed.

The application belongs to the technical field of semiconductor gas sensitive material and sensor, and particularly relates to a selective gas sensitive material for a complex gas environment and a preparation method and application thereof. The gas sensitive material takes WO3 nanofiber as a substrate, composites ZnO nanoparticles on the surface of the substrate, and loads noble metal Ir to form an Ir-ZnO / WO3 ternary composite structure. The composite structure is obtained by adding WO3 nanofiber prepared by an electrospinning method, ZIF-8 precursor and Ir nanoparticles into an anhydrous ethanol solution, and then performing ultrasonic treatment and drying, and finally calcining under an air atmosphere. The material and the sensor exhibit high sensitivity and high selectivity to BTXs, and have good anti-interference ability and stability, and are suitable for real-time monitoring and early warning of BTXs leakage in a complex industrial site with multiple gas interference such as petrochemical industry and waste treatment.

Disclosed in the present invention is a composite powder having a CaCO3@ZnO core-shell structure, the composite powder comprising a nano calcium carbonate core and a zinc oxide shell, wherein the weight of the zinc oxide is 5-15% of the weight of the nano calcium carbonate. The composite powder having a CaCO3@ZnO core-shell structure of the present invention has good dispersibility, has whiteness greater than 95, a uniform zinc oxide coating and a very low content of zinc oxide, and has a good application effect in rubber, thereby achieving the aims of being low cost, having high efficiency and being environmentally friendly.

This invention discloses a rotary kiln for zinc oxide solid powder, belonging to the field of rotary kilns. It includes a chassis with an internal mounting cavity; a three-axis adjustment module detachably installed within the chassis; and a rotary kiln detachably installed within the chassis. The rotary kiln for zinc oxide solid powder of this invention, through the arrangement of tamping components, can, on the one hand, push the crossbar outward to push the tamping plate to expand and push the material, thereby enhancing the material's fluidity within the rotary kiln, increasing the material's heating area, and accelerating the drying effect. On the other hand, it can also drive the slip ring downward through the rotation of an elastic element, driving the internal disc to rotate and lift the material on the internal disc, further enhancing the material's fluidity and increasing the heating and drying area. Thirdly, it can further agitate the material through the repeated up-and-down movement of the lifting disc, thereby enhancing the material's fluidity.

The present application relates to the technical field of hydrometallurgy, and discloses a method for preparing hydroxide from reverse copper-manganese solution, which comprises the following steps: controlling the potential of the reverse copper-manganese solution to carry out sulfidation copper deposition, so as to obtain a copper deposition solution; adjusting the pH of the copper deposition solution to 4-6, mixing the copper deposition solution with manganese powder to carry out manganese-zinc replacement, and obtaining zinc-manganese slag and a zinc deposition solution after sufficient reaction; mixing the zinc-manganese slag with sufficient zinc-dissolving alkali solution to carry out reaction, and obtaining manganese slag and the zinc-dissolving solution after solid-liquid separation; adjusting the pH of the zinc-dissolving solution to 7-8, and carrying out solid-liquid separation after sufficient reaction, so as to obtain zinc hydroxide. The method has a short overall process, good separation and purification effect, and can obtain crude manganese hydroxide and zinc hydroxide products.

The invention discloses a composite material and a preparation method thereof, a thin film, a photoelectric device and a display device, the composite material comprises metal oxide nanoparticles and a shell layer coating the surfaces of the metal oxide nanoparticles, and the material of the shell layer comprises alkali metal halide. According to the composite material provided by the technical scheme of the invention, the surfaces of the metal oxide nanoparticles are coated with the alkali metal halide, so that the stability of the metal oxide nanoparticles in the electrifying process is improved, and the electrochemical change is reduced.

The invention discloses a nano-cellulose reinforced biomass-based high-strength furniture board and a preparation method thereof, and belongs to the technical field of furniture board preparation, and the method comprises the following steps: preparing ZnO nanowire functionalized CNF by using a sol-gel method and a hydrothermal method and inducing by using an orienting agent, then preparing ferulic acid and lignin-based microcapsules by using an emulsion solvent evaporation method, and finally preparing the nano-cellulose reinforced biomass-based high-strength furniture board. Then, mixing the ZnO nanowire functionalized CNF, ferulic acid and lignin-based microcapsules, hydroxypropyl methyl cellulose and the like at a high speed to obtain a compound, and finally, carrying out gradient temperature melt extrusion, and carrying out liquid nitrogen cooling molding at-40 DEG C; through the synergistic effect of vertical growth of the ZnO nanowires to enhance interface bonding, stable ultraviolet resistance of the microcapsules and optimized dispersion of the dispersing agent, the problems of mechanical attenuation / color fading caused by weak mechanical property and ultraviolet aging of a biomass-based plate and failure of a traditional anti-ultraviolet agent are solved, synergistic improvement of mechanical property and ultraviolet resistance is realized, and the mechanical property and the anti-ultraviolet property of the biomass-based plate are improved. And the requirements of stable load bearing and ultraviolet fading resistance of medium-and-high-end furniture are met.

The application belongs to the technical field of zinc oxide preparation, and particularly relates to a zinc oxide preparation method, which comprises the following steps: step 1: raw material preparation, wherein zinc mud, sodium hydroxide and carbon dioxide are put into a mixer; step 2: mixing and dissolving, wherein the pretreated zinc mud is mixed with an appropriate amount of sodium hydroxide solution, and is fully stirred and uniformly distributed, so that the zinc mud is dissolved to obtain a mixed solution; and step 3: carbon dioxide is introduced, wherein carbon dioxide gas is introduced into the mixed solution, so that the solution is weakly alkaline, and a chemical reaction occurs to generate basic zinc carbonate precipitate, and the incompletely crushed materials can be re-fed for crushing through the setting of a conveying belt and a scraper.

The present invention relates to a crosslinkable polymer composition comprising at least one calcium phosphate, at least one biocompatible and biodegradable organic polymer or one of its precursors, and Zn-ZnO core-shell particles, a biomaterial obtainable by photopolymerization of such a crosslinkable polymer composition, methods for preparing such a composition and such a biomaterial, and the use of such a biomaterial for various applications in the health sector.

The application belongs to the technical field of new materials, and discloses a preparation method of an aluminum zinc oxide target material. Molten aluminum and zinc mixed metal liquid and inert gas are mixed and prepared into a spray, the spray is mixed with oxygen to perform an oxidation reaction, and an aluminum zinc oxide powder is prepared. The aluminum zinc oxide target material is prepared by using the aluminum zinc oxide powder. The method uses a molten metal liquid spray oxidation method to prepare the aluminum zinc oxide powder. The related production equipment only needs one-time investment and can be used for a long time. No additional expensive reagent is needed, and the production cost is low and the process is simple.