376results about "Zinc oxides/hydroxides" patented technology

The invention belongs to the technical field of preparation of sensor materials, and particularly relates to a room-temperature formaldehyde sensor material based on a catalytic principle as well as preparation and application of the room-temperature formaldehyde sensor material. The polyphenol is adsorbed on the surface of the semiconductor metal oxide through chelation, then noble metal ions are introduced, and the polyphenol on the surface of the semiconductor metal oxide can capture the noble metal ions and reduce and stabilize the noble metal ions on the surface of the semiconductor metal oxide; the noble metal nanoparticles are anchored on the surfaces of the semiconductor metal oxide nanoparticles, the original morphology of the semiconductor metal oxide is maintained, and the noble metal nanoparticles are loaded on the surfaces of the semiconductor metal oxide nanoparticles. The nano composite material not only has the intrinsic electrical and thermodynamic properties of semiconductor metal oxide, but also combines the catalytic characteristics of noble metal nanoparticles, so that the lower detection limit of formaldehyde is reduced to 3ppb, and the sensitivity of the sensor is remarkably improved. The preparation method of the room-temperature formaldehyde sensing material is simple and suitable for large-scale production, the raw materials are simple and easy to obtain, the cost is low, and the materials are environment-friendly.

A nano composite, a nanoparticle ink composition including a solvent and the nanocomposite, and a light-emitting device including a first electrode, a second electrode facing the first electrode, and an interlayer between the first electrode and the second electrode, wherein the interlayer includes an emission layer, and at least one layer included in the interlayer is made from the nanoparticle ink composition. The nano composite includes: a metal oxide nanoparticle; and a chelating ligand bonded to a surface of the nanoparticle and including a cyclic moiety.

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 present application belongs to the technical field of nanometer material, and discloses a kind of sheet porous nanometer zinc oxide and its preparation method and application.The present application first prepares basic zinc carbonate precursor, then nitrogen is passed into, the pressure of system is >0.4MPa and <0.6MPa, hydrothermal reaction is carried out, and the reaction product is calcined, and sheet porous nanometer zinc oxide is prepared.The sheet porous nanometer zinc oxide prepared by the method of the present application has uniform and regular sheet porous structure, the holes on the sheet are uniform and regular, dense, small in particle size, large in specific surface area, and can be widely applied in the degradation of organic pollutants in photocatalytic system and the field of heavy metal adsorption.The preparation method of the present application can obtain raw materials easily and can be mass-produced.

The invention discloses a method for in-situ lossless repair of an attenuated lithium manganate positive electrode material, which specifically comprises the following steps: adding the attenuated lithium manganate material into a lithium hydroxide solution, supplementing lithium to an original value by a hydrothermal method, repairing the component and structure defects of attenuated LiMn2O4 by combining high-temperature roasting, and recycling and regenerating lithium manganate particles with severely attenuated capacity. The lithium manganate positive electrode material is directly recovered by the lossless method, and the chemical components and crystallinity of the invalid positive electrode material in various health states are reconstructed, so that the invalid positive electrode material can be repeatedly used in the lithium ion battery. Finally, the treated recycled powder material is coated by a metal organic framework (MOFs) self-assembly method, so that the electrochemical performance of the treated powder material is further improved. The method is simple, environmentally friendly and low in energy consumption, has obvious advantages compared with a traditional hydrometallurgy battery recovery method, and lays an important foundation for sustainable manufacturing of energy materials.

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.

This invention discloses a multifunctional composite flexible fabric with multiple functions including radiative cooling, energy harvesting, hydrophobicity, and antibacterial properties. The composite flexible fabric consists of several electrospun fiber layers, each formed sequentially by electrospinning in a top-to-bottom order. It includes at least two polymer electrospun fiber layers and at least one nanofunctional electrospun fiber layer, wherein the nanofunctional electrospun fiber layer serves as an intermediate sandwich layer, forming a sandwich structure with the polymer electrospun fiber layers located on the upper and lower surfaces. This invention also discloses a method for preparing this flexible fabric, using electrospinning to prepare it by electrospinning a PVDF or related polymer solution and a polymer solution modified with functional nanoparticles. This preparation method can effectively control the morphology of the nanofibers and the functions of the nanoparticles, enabling a synergistic effect between the functional nano-scattering particles and the nanofibers, resulting in an integrated functional fabric with thermal management, energy harvesting, and antibacterial properties.

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.

This disclosure provides lithium supplement materials, including Li5Fe1-xMxO4 and a cladding layer disposed on a surface of Li5Fe1-xMxO4. In Li5Fe1-xMxO4, where M is at least one of Ni, Mn, Ru, Cr, Cu, Nb, Al, Mg, Ca, Ga, Ti, and Mo, and 0≤x≤0.2. The cladding layer includes M′-doped zinc oxide or M′-doped composite oxide based on zinc oxide, and M′is an ion capable of forming a substitutional solid solution with zinc oxide or composite oxide based on zinc oxide.

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.

The invention belongs to the technical field of nano sensing and gas monitoring, and discloses an MXene / ZnO nano composite material as well as a preparation method and application thereof. The preparation method comprises the following steps: firstly, etching Ti3AlC2 by using hydrochloric acid and lithium fluoride to obtain multi-layer two-dimensional MXene, and then carrying out ultrasonic stripping and freeze drying to obtain few-layer MXene; carrying out alkalization treatment on few layers of MXene, and then carrying out centrifugal cleaning to obtain 1D / 2D-MXene with a composite structure; the preparation method comprises the following steps: adding 1D / 2D-MXene and zinc acetate dihydrate into a mixed solution of water and ethanol, and carrying out a hydrothermal reaction; the preparation method comprises the following steps of: performing centrifugal cleaning and vacuum drying to obtain a multi-level 1D / 2D-MXene / 0D-ZnO nano-composite structure consisting of 0D-ZnO, 1D-MXene and 2D-MXene, and the multi-dimensional nano-composite structure is suitable for preparing a gas sensor and is used for detecting low-concentration nitrogen dioxide gas at room temperature. The nano composite material and the sensor prepared by the invention show excellent gas-sensitive performance on nitrogen dioxide gas, are high in sensitivity, can realize normal-temperature detection, and have relatively great application potential.

The utility model relates to the technical field of secondary zinc oxide rotary kilns, and discloses an efficient combustion device of a secondary zinc oxide rotary kiln, which comprises a balancing weight, a supporting base, a fixed sliding chute, an adjusting motor, a heat dissipation plate and a secondary zinc oxide rotary kiln cylinder, a fixed sliding groove is fixedly formed in the upper end of the balancing weight, an adjusting motor is fixedly arranged at the left end of the balancing weight, and a heat dissipation plate is fixedly arranged at the left end of the adjusting motor. According to the high-efficiency combustion device of the secondary zinc oxide rotary kiln, through improvement of the high-efficiency combustion device, the air supplementing and discharging capacity of the high-efficiency combustion device is improved, in the actual using process of the high-efficiency combustion device, air can be conveniently and effectively supplemented to the secondary zinc oxide rotary kiln according to needs, and the secondary zinc oxide rotary kiln can be conveniently and rapidly combusted. And regulation and control of discharging of the secondary zinc oxide rotary kiln are facilitated, and the combustion effect of the efficient combustion device of the secondary zinc oxide rotary kiln is improved.

The invention belongs to the technical field of lithium ion batteries, and particularly relates to a metal oxide-based composite material as well as a preparation method and application thereof. The composite material provided by the invention has a nano-particle aggregate structure, and nano-particles in the nano-particle aggregate structure shorten the diffusion path of lithium ions and improve the diffusion speed of the lithium ions. The composite material is in an irregular particle shape, and the particle size is non-uniformly distributed, so that tight compaction is favorably realized, and the specific capacity is further improved. And meanwhile, a three-dimensional conductive network is constructed by coating carbon in the composite material, so that the conductivity of the composite material is enhanced, volume expansion and shrinkage generated in the charge-discharge process can be buffered, and the structural integrity of the electrode plate in the long-cycle process is kept. The composite material comprises two metal oxides, namely ZnO and MnO, and due to the synergistic effect of the two metal oxides, the composite material shows high electrochemical activity, so that the charge-discharge capacity and long cycle stability of the composite material under high current density are improved.

A system for the synthesis of zinc oxide, iron oxide and manganese oxide nanoparticles by means of green synthesis using pea shell biomass extract as a reducing agent, wherein the nanoparticles have sizes in the range of 40-120 nm, which were confirmed by UV-Vis absorption, FTIR and FESEM.

The present application belongs to the technical field of toxin detection, and particularly relates to a method for detecting shellfish toxin based on transition metal oxide / gold particle composite SERS substrate; paralytic shellfish poison, i.e. saxitoxin, in the shellfish toxin is selected as a detection object; the specific steps are as follows: firstly, a zinc oxide-silver composite nanoparticle SERS substrate is prepared to enhance the Raman signal of saxitoxin; then, SERS spectra of saxitoxin with different concentrations are collected; the collected spectra are introduced into matlab to establish a prediction model by using a PLS algorithm; an actual sample is treated according to a national standard method to obtain a treatment liquid; then, the SERS spectrum of the treatment liquid is collected and introduced into the prediction model to obtain a prediction result; the present application has the advantages of simple synthesis steps, good SERS enhancement effect, fast detection speed, high stability, and good application prospect in the technical field of harmful factor detection in food 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.

The present invention belongs to the field of antibacterial materials, and in particular relates to a piezoelectric photocatalytic antibacterial material and its preparation method and application. The method comprises: x Zn 1‑x A manganese source and a zinc source are separately mixed with an alkaline sodium compound solution and bentonite, and then subjected to low-speed ball milling and autothermal ball milling, respectively, to obtain the piezoelectric photocatalytic antibacterial material; wherein: 0<x<1. The piezoelectric photocatalytic antibacterial material prepared by the present invention has strong piezoelectricity and, while having high adsorption capacity, its positive charge interferes with bacterial activity, thereby achieving effective antibacterial and odor-removing effects. The preparation process is characterized by simple operation, low energy consumption, economical practicality, and a short production cycle.

The application belongs to the technical field of waste zinc oxide desulfurizer regeneration, and provides a waste zinc oxide desulfurizer regeneration method, which comprises the following steps: S1, crushing and screening the waste zinc oxide desulfurizer, adding the waste zinc oxide desulfurizer into a reaction kettle, and stirring after adding ammonia water; S2, passing in ammonia gas and continuing to stir; S3, adding a soluble iron salt and dropping hydrogen peroxide solution; S4, carbonizing by passing in carbon dioxide gas into the reaction kettle, adjusting the PH value of the solution, and then filtering to obtain filter cake and filtrate; S5, taking the filter cake to a sulfur melting kettle for recovery, taking the filtrate to an ammonia evaporation kettle, and performing cooling and filtering on the kettle liquid to obtain basic zinc carbonate filter cake; S6, drying, calcining and crushing the basic zinc carbonate filter cake to obtain active zinc oxide powder; and S7, uniformly kneading the active zinc oxide powder with a binder, a pore-forming agent, basic zinc carbonate and water, extruding into a strip, drying, calcining and obtaining a zinc oxide desulfurizer product. The method can realize green recovery of the zinc oxide desulfurizer, does not generate waste gas and waste liquid, and is environmentally friendly.

The application provides a core-shell heterogeneous gradient structure anti-ionizing radiation powder and a preparation method and application thereof, and belongs to the field of radiation protection. The preparation method of the core-shell heterogeneous gradient structure anti-ionizing radiation powder comprises the following steps: adding a high-atomic-number metal salt into deionized water, sequentially performing aging, washing, drying and primary calcination to obtain a core layer; adding the core layer and a low-atomic-number metal salt into deionized water, sequentially performing aging, washing, drying and primary calcination to obtain a preliminary wrapped powder in which a low-atomic-number metal wraps a high-atomic-number metal core layer; adding the preliminary wrapped powder and a rare earth salt into deionized water, sequentially performing aging, washing, drying, primary calcination, secondary calcination, airflow pulverization and air rotation blowing to obtain the core-shell heterogeneous gradient structure anti-ionizing radiation powder. Through the synergy of the core-shell heterogeneous structure, high-atomic-number and low-atomic-number oxides and multiple rare earth elements, the shielding performance of the material is significantly improved.

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.

Provided is a metal hydroxide composite including a base layer, a surface layer, and an active ingredient, the metal hydroxide composite including a multilayer hydroxide structure of Chemical Formula 1; a metal hydroxide composite prepared by including a step of co-precipitating an active ingredient and a metal hydroxide structure precursor by a precipitation reaction using an alcohol and water, and a method for preparing the same.

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.