87results about How to "Skeleton structure is stable" patented technology

A method for gelating a co-precursor relates to an aerogel. The invention provides a method for preparing transparent silica aerogel by normal pressure drying through a co-precursor method. The method has the advantages of low cost, simple process, short production cycle, controllable reaction course and continuous production. Tetraethyl silicate and absolute ethyl alcohol are put into a container according to a proportion and stirred, and added with methyl triethoxysilane; added with water and stirred; added with hydrochloric acid to regulate the pH of the solution; added with ammonia water to regulate the pH of the system after stirring; the silica sol is kept stand still after stirring to obtain wet gel; the obtained wet gel is put into a normal hexane solution or a normal hexane solution containing the methyl triethoxysilane with volume concentration of 10%-50% for solvent exchange and aging, after being exchanged by the solution containing the methyl triethoxysilane agent, the gel is washed by the normal hexane solution to remove the methyl triethoxysilane remained on the surface of the sample, and the transparent silica aerogel is obtained by drying.

The invention relates to a SiOx-based composite material, a preparation method and a lithium ion battery. The SiOx-based composite material comprises a SiOx / C material, wherein the SiOx / C material comprises SiOx nano particles, organism cracked carbon, nano conductive particles and amorphous conductive carbon layers, the SiOx nano particles, the organism cracked carbon and the nano conductive particles are wrapped in the amorphous conductive carbon layers, the SiOx / C material is in a spherical shape and comprises a porous structure, and x is more than or equal to 0.5 and less than or equal to 1.3. The composite material is used as a negative electrode material of the lithium ion battery, excellent in cycling performance, excellent in rate performance and low in size expansion effect, applicable to the fields such as top-grade digital electrons, electric tools and next-generation vehicle-mounted devices and wide in market prospect.

The invention provides a mesoporous silica nano hollow sphere and a preparation method thereof. The mesoporous silica nano hollow sphere is characterized by comprising a spherical shell in which a cavity is formed; the spherical shell is formed by aggregating mesoporous silica nano particles with the grain size being 5-50nm, and amino is contained on the inner and outer surfaces of the spherical shell. The novel mesoporous silica nano hollow sphere prepared in the invention is rich in amino on the surface and has the characteristics of being great in specific surface area, good in biocompatibility, high in stability, great in drug loading capacity and the like.

The invention provides a high nickel quaternary cathode material precursor, a high nickel quaternary cathode material, a preparation method and an application. The chemical formula of the high nickelquaternary cathode material is shown as a formula Lia(Ni1-x-y-zCoxAlyMnz)O2, x, y, z and a are mole fractions, x is larger than 0.03 and smaller than or equal to 0.15, y is larger than 0.01 and smaller than 0.05, z is larger than 0.01 and smaller than 0.05, 1-x-y is larger than 0.6 and smaller than 0.9, and a is larger than or equal to 1 and smaller than or equal to 1.1. Soluble nickel salt, soluble cobalt salt, soluble aluminum salt and soluble manganese salt are prepared in a form of a solution and can be uniformly distributed in the solution, and the high-nickel quaternary cathode materialprecursor is prepared from the solution with the uniformly distributed nickel salt, cobalt salt, aluminum salt and manganese salt; then, the high nickel quaternary cathode material precursor and lithium salt are mixed and sintered four times, and the high nickel quaternary cathode material is obtained. The high nickel quaternary cathode material has stable structure, high safety performance, longcycle life and good thermal stability.

The invention discloses a three-dimensional fluorescent covalent organic framework material as well as a preparation method and application thereof. A hexamethyl biphenyl aldehyde derivative and a series of pyrenylamine derivatives are used as raw materials, o-dichlorobenzene and mesitylene are used as solvents, acetic acid is used as a catalyst, and solvothermal reaction is carried out for several days. After the reaction is finished, suction filtration and washing are sequentially carried out by using DMF and THF, carrying Soxhlet extraction is carried out for 24 hours, and vacuum drying iscarried out to obtain yellow powder, namely a target product. Hexamethyl biphenyl tetraaldehyde based on a steric effect and pyrenyl tetramine with fluorescent property are used as construction monomers, the synthesized Turn-on type three-dimensional fluorescent covalent organic framework has a rich cavity structure and a conjugated three-dimensional skeleton, the aggregation-induced quenching effect of fluorophores is avoided, the sensitivity of host-guest response of the material is improved, the material has a good application prospect in the field of fluorescence sensing, and the three-dimensional covalent organic framework is applied to the field of VOCs molecular decoding for the first time.

The invention provides a preparation method of a modified Beta molecular sieve catalyst, belonging to the technical field of catalysts. The preparation method comprises the steps of preparing Beta molecular sieve raw powder, preparing a Mn-Co-Beta molecular sieve, and preparing a Sn modified Mn-Co-Beta molecular sieve, wherein the mole ratio of Mn to Co is (5-8) to 1, Mn accounts for 10%-13% of the mass of the Mn-Co-Beta molecular sieve, and the mole ratio of Sn to manganese is 1 to (35-40). The catalyst prepared by virtue of the preparation method can be applied to an automobile tail gas low-temperature SCR denitration system and has relatively good CO2 and SO2 poisoning resistance in the premise that a relatively good temperature operation window is maintained, so that the relatively good catalytic activity is guaranteed.

The invention relates to application of organic framework porous solid acid. A catalyst for catalytic esterification and acylation reaction is prepared by the steps of adding a divinyl benzene monomer into a solvent prepared by mixing azobisisobutyronitrile, tetrahydrofuran and water, performing hydro-thermal treatment at the normal temperature under the constant pressure, and volatilizing the solvent at the room temperature to obtain polydivinylbenzene; grinding the polydivinylbenzene into 200-mesh powder and performing degassing treatment under the nitrogen condition; adding polydivinylbenzene blocks into 1,1',2-methyl chloroform to explode and crack into small blocks, wherein the small blocks swell; evenly mixing 1,1',2-methyl chloroform and concentrated sulfuric acid, adding silver sulfate serving as a catalyst, adding processed polydivinylbenzene, performing sulfonation, filtering and dioxane washing till a solution is neutral, performing drying, using dilute sulphuric acid to activate, performing washing till the solution is neutral and performing drying. The catalyst is used for the catalytic esterification and the acylation reaction and has high catalytic activity and conversion rate.

The invention discloses a CoMn2O4 / NC / S composite material as well as a preparation method thereof and application thereof as a Li-S secondary battery cathode material. The CoMn2O4 / NC / S composite material is formed by anchoring CoMn2O4 nanoparticles on NC (Nitrogen doped graphitized porous Carbon) and then compounding with sulfur. The preparation method comprises the following steps: carrying out roasting treatment on an MOF (Metal Organic Framework) material ZIF-67, thus obtaining a Co-N-C composite material; then carrying out hydrothermal reaction on the Co-N-C composite material, manganese salt and hypermanganate, thus obtaining a CoMn2O4 / NC composite material; further compounding with the sulfur, thus obtaining the CoMn2O4 / NC / S composite material. The CoMn2O4 / NC / S composite material disclosed by the invention is capable of simultaneously carrying out strong chemical adsorption and physical adsorption on polysulfide formed during a charging-discharging process of a Li-S secondary battery, and is capable of effectively inhibiting dissolution loss of the polysulfide, reducing the generation of a shuttle effect and prolonging the service life of the Li-S secondary battery. Meanwhile, the preparation method adopts low-cost and low-toxicity Mn to partially replace expensive and toxic Co for being applied to the Li-S secondary battery, and important innovation and practice significances are obtained.

The invention provides a potassium silicate binder. The potassium silicate binder is characterized by comprising raw materials in parts by mass as follows: 30-50 parts of potassium silicate, 8-14 parts of white carbon black, 14-28 parts of magnesium oxide, 5-10 parts of magnesium chloride, 5-10 parts of magnesium sulfate, 5-10 parts of condensed aluminum phosphate, 2-8 parts of peregal O and 6-12 parts of water. The potassium silicate binder has the advantages as follows: the price is low, the application range is wide, normal-temperature curing is realized, water resistance is good, high temperature resistance is realized, flame retardancy is good, binding strength is high, the raw materials are foamed, the dosage is saved, the cost is reduced and the like.

The invention provides a cathode material precursor which is of a core-shell structure. The material chemical formula of the core is Ni<1-x-y-z>Co<x>Al<y>Mn<z>(OH)2, and the material chemical formulaof the shell is Ni<1-r-s>Co<r>Mn<s>CO3, wherein 1-x-y-z is a value in the range of 0.80 to 0.96, x is greater than 0, y is a value in the range of 0.01 to 0.10, z is a value in the range of 0.01 to 0.10, 1-r-s is a value in the range of 0.34 to 0.70, r is greater than 0, and s is a value in the range of 0.20 to 0.40. The cathode material of the invention has a stable structure, high safety performance, long cycle life and good thermal stability.

The invention belongs to the field of lithium ion batteries and provides a lithium ion battery anode material Li(Ni0.8Co0.1Mn0.1)1-xYxO2 and a preparation method thereof. In the formula, x is greaterthan 0 and less than or equal to 0.05, and the material is used for overcoming defects that LiNi0.8Mn0.1Co0.1O2 is poor in electrochemical circulation property and poor in security property. Accordingto the material, bulk phase doping modification is carried out, mixed cation arrangement of the material is reduced through doping a very small amount of a yttrium element, an Li<+> diffusion channelcan be increased, the diffusion capability of Li<+> in the material can be improved, internal structures of the material can be stabilized, and the circulation stability of the material can be remarkably improved; in addition, by virtue of the capability that metallic yttrium ions have an oxygen storage function, Ni<4+> ions in the material have very high oxidation activity when lithium of the material is removed at a high voltage; in addition, due to O2- absorption functions of the yttrium ions, the surfaces of Ni<4+> ions can be passivated, the oxidability of electrolyte can be weakened, and the security of recharge and discharge at a high voltage can be improved; due to LiYO2 lithium fast ion conductor generated on the surface, not only is the ionic conductivity improved, but also thesurface alkalinity of the material can be degraded. By adopting the lithium ion battery anode material, relatively large multiplying power recharge and discharge and high-energy density requirements can be met, and in addition, the security under a high-voltage recharge and discharge condition can be greatly improved.

The invention discloses a high-modulus colored asphalt mixture and a preparation method thereof. The preparation method is simple and easy to implement, the prepared colored asphalt mixture has the characteristics of high modulus and excellent pavement performance. Compared with AC-13 and SMA-13 and other conventional asphalt mixtures, the colored asphalt mixture has the advantages of fulfilling long-time use of special sections to avoid damages of pavement, especially has excellent high-temperature resistance and durability, and has durable and bright color; furthermore, by reasonably selecting grading of aggregates and mineral powder, the passing rate of fine aggregates can be reduced, the proportion of coarse aggregates can be improved, the colored asphalt mixture forms a stable frame structure, and the high-temperature anti-shearing anti-rutting performance is good.

The invention discloses a preparation method of a catalyst applicable to methanation of a slurry reactor. The method comprises the following steps: pretreating nickel powder by using diluted acid, pretreating aluminum powder by using an organic solvent, uniformly mixing the nickel powder with the aluminum powder, melting in a high-temperature furnace provided with an external magnetic field, cooling to room temperature in the presence of inert gas, grinding into particles of which the size is 80-200 meshes, putting a NaOH solution into an ultrasonic constant-temperature water bath, stirring and adding nickel-aluminum alloy powder into the NaOH solution to react, removing alkaline liquid from the upper layer after the reaction ends, washing by using deionized water until the solution is neutral, and then washing by using absolute ethanol to obtain a Reyne nickel catalyst. The catalyst provided by the invention has the advantages of being high in strength, high in activity and applicable to the methanation of the slurry reactor.

The invention relates to rare earth-containing Li-LSX zeolite and a preparation method thereof, and belongs to the technical field of chemical engineering. The preparation method comprises the following steps: (1) adding a silicon source, an aluminum source and caustic alkali according to the molar ratio of M2O / SiO2 = 1-1.5, the molar ratio of SiO2 / Al2O3 = 2.5-5 and the molar ratio of H2O / SiO2 = 45-50, mixing and stirring, and crystallizing at 80-100 DEG C for 5-10 hours; (2) after filtering, exchanging a product with a rare earth salt solution for 1-2 times, and roasting at 350-550 DEG C for 0.5-3 hours after primary exchange; (3) after grinding, supplementing and adding a silicon source, an aluminum source and caustic alkali according to the proportion of 40%-95% of the total mass of a dry basis, enabling the total molar ratio of materials to be M2O / SiO2 = 3.5-4 (the molar ratio of Na / K of alkali metal M is 2.5-3.5), SiO2 / Al2O3 = 1.5-2 and H2O / SiO2 = 70-75, stirring, aging for 1-3 days, and crystallizing again at 60-80 DEG C for 10-25 hours; and (4) after filtration and ammonium salt exchange, carrying out ion exchange for 2-5 times by using a lithium compound solution, and roasting for 1-2 times at intervals at 300-430 DEG C / 0.5-3 hours. The lithium salt utilization rate is high in preparation, the product composition and performance are easy to adjust, and the product has better adsorption separation performance when being used as an oxygen production adsorbent.

The invention discloses a high nickel-inorganic nano-powder composite electrode material and a preparation method thereof. The preparation method of the material includes processes of blending, sintering, grinding, screening and the like and has the advantages of simple process, low energy consumption and high yield. The composite electrode material is prepared from nickel-cobalt-manganese composite oxide; the nickel-cobalt-manganese composite oxide forms microspheres, and the microspheres are wrapped by a wrapping layer formed by an inorganic nano material; the composite electrode material can be used as a cathode active material of a lithium ion battery so that the electrochemical performance of the lithium ion battery can be greatly improved, meanwhile, the cycling stability and the rate capability of the lithium ion battery are improved, the defects of a ternary cathode material that the stability and the rate character are poor are overcome, the electrochemical performance of thelithium ion battery are well brought into play, and thus the material and the preparation method thereof have huge development potential in the field of lithium ion battery application.

The present invention provides a positive electrode material precursor which is a core-shell structure. The material chemical formula of the core is Ni1-x-yCoxAly(OH)2. The material chemical formula of the shell is Ni1-r-s-tCorAlsMntCO3, wherein 1-x-y is a value in a range of 0.80 to 0.96, x is greater than 0, y is a value in a range of 0.01 to 0.10, 1-r-s-t is a value in a range of 0.34 to 0.70,r is greater than 0, s is a value in a range of 0.20 to 0.40, and t is a value in a range of 0.20 to 0.40. The positive electrode material of the invention is stable in structure, high in safety performance, long in cycle life and good in thermal stability.

The invention provides a nano porous fixed acid catalyst with an organic frame and a synthesis method thereof. The catalyst comprises a poly(divinyl benzene) basic frame and a sulfonic active site. The solid acid catalyst has the advantages of capability for swelling, large specific area, high sulfonic group content, stable frame structure, and high catalytic activity. The disclosed catalyst and synthesis method thereof overcome the shortages of bad organic frame stability and low specific area in the conventional solid acid catalysts.

The present invention provides an anode material precursor. The anode material precursor comprises a core-shell structure, the material chemical formula of the core is Ni1-x-y-zCoxAlyMnzCO3, the material chemical formula of the shell is Ni1-r-sCorAls(OH)2, (1-x-y-z) is a value in the range of 0.80- 0.96, x is greater than 0, y is a value in the range of 0.01-0.10, z is a value in the range of 0.01-0.10, (1-r-s) is a value in the range of 0.34- 0.70, r is larger than 0, and s is a value in a range of 0.20-0.40. The anode material is stable in structure, high in safety, long in cycle life and good in thermal stability.

The invention discloses a sintered refractory brick and a making method thereof, and relates to the field of refractory materials. The refractory brick comprise modified quartz powder, magnesite slag, dolomite powder, bauxite, diopside powder, lime milk, expanded graphite, niobium carbide powder, boron nitride powder, silicon phosphide powder, silicon carbide fibers, an activator, a water reducer, foaming agent and a foam stabilizer. The refractory brick is made through mix-grinding, standing ageing, drying and calcination of the above raw materials. The making method of the refractory brick has the advantages of simplicity, low energy consumption during production, and short time; and the refractory brick produced in the invention has the advantages of high compressive strength, excellent thermal shock resistance, low thermal conductivity, effectively prolonged service life in a high temperature furnace and a kiln, and suitableness for being promoted and applied.

The invention discloses a rodlike alumina carrier preparation method and an alumina carrier. The preparation method comprises the following steps: (1) uniformly mixing rodlike alumina powder with an extrusion aid; (2) uniformly mixing a peptizing agent and water, and uniformly spraying the mixture obtained in the step (1); and (3) molding the material obtained in the step (2), drying and roastingto obtain the final alumina carrier. The alumina carrier prepared by the method provided by the invention not only has a firm skeleton structure, but also can uniformly distribute active components inpores, that is, shows comprehensive properties such as high mechanical strength, proper water absorption rate and the like, and is especially suitable for being used as a carrier of an alkane dehydrogenation catalyst.

The invention discloses a preparation method of an Nd-MOFs gas adsorption material. The preparation method comprises ligand AGE synthesis and material synthesis, and comprises the following specific steps: adding a ligand solution and a neodymium chloride solution into a conical bottle respectively, mixing uniformly, adding N,N-diisopropylethylamine (DIEA) dropwise under a magnetic stirring condition to regulate the pH of the solution to 7 to 8, and stirring for reacting at a room temperature; then performing suction filtration with a vacuum pump, washing the obtained solid with acetone for 2to 5 times, and washing with distilled water for 2 to 4 times; then placing the solid into a drying oven for drying until constant weight to obtain the Nd-MOFs gas adsorption material. The Nd-MOFs gasadsorption material prepared by the method solves the problems of change of multiple factors, degradation in the montmorillonite adsorption performance and the like due to easy desorption of activated carbon under a high temperature environment, incapability of applying a zeolite molecular sieve to adsorption under strong inorganic acid and strong alkali conditions, and the need of strictly controlling the pH value of the solution in the process of chemical modification on the surface of montmorillonite, and has an excellent adsorption effect.

The invention discloses a modified Y type molecular sieve as well as a preparation method and application thereof. The Y type molecular sieve has the following properties: the crystal particle average diameter is 2.0 to 5.0 mu m, the relative crystallinity is 100 percent to 140 percent, the molar ratio of SiO2 / Al2O3 is 30 to 100 and is preferably 40 to 100, the crystal cell parameter is 2.428 to 2.445nm, and the pore volume of a hole with the hole diameter being 2nm to 8nm accounts for 80 percent to 95 percent, preferably 80 percent to 90 percent of the total pore volume. The total acid content of NH3-TPD is 0.2 to 1.0mmol / g, wherein, the strong acid accounts for 75 percent or more of the total acid amount at the temperature larger than 250 DEG C, the pore volume of the Y type molecular sieve is 0.55cm<3> / g to 0.70cm<3> / g, and the specific surface area is 700m<2> / g to 1000m<2> / g. The molecular sieve has the advantages of large crystal particle, high crystalline, high silicon, more concentrated effective hole diameter distribution, favorable heat stability and hydrothermal stability and the like, and is suitable to be used for preparing a hydrogenation catalyst.

The invention provides a preparation method of a microcapsule antibacterial functional finishing agent. According to the microcapsule antibacterial functional finishing agent, mesoporous silica coatedwith polyurethane serves as a wall material, aloin, lemon essential oil, vanilla oil and Chinese mugwort oil serve as core materials, and the weight ratio of the wall material to the core materials is 1:(1-5). A fabric finished by the finishing agent has good antibacterial effect, a combination action of the finishing agent and the fabric is high, and the antibacterial effect is more durable through sustained-release effect of a microcapsule. Antibacterial components used by the finishing agent are provided with natural extracts, safe and free from toxicity, and good health states of skins can be kept. The finishing agent has important application values in the field of textile.

The invention relates to the field of catalytic materials, and discloses a catalyst for preparation of dimethyl sulfide and a method for synthesis of dimethyl sulfide. The catalyst comprises a molecular sieve; and the catalyst NH3-TPD is characterized by comprising the following characteristics: the desorbed amount of ammonia at 150 DEG C to 250 DEG C is no more than 0.125 mmol / g; the desorbed amount of ammonia at 450 DEG C to 550 DEG C is no more than 0.036 mmol / g; and the total desorbed amount of ammonia at 150 DEG C to 550 DEG C is no less than 0.237 mmol / g. By adoption of the catalyst provided by the invention, a reaction of hydrogen sulfide and methanol can be effectively catalyzed to perform; and the method provided by the invention can obtain higher dimethyl sulfide selectivity, andcan enable the methanol to achieve a higher conversion rate at the same time.

The invention discloses a preparation method of dimethyl sulfide. The method comprises the step of reacting hydrogen sulfide with methanol in the presence of a modified molecular sieve catalyst to generate dimethyl sulphide, and is characterized by preparing the modified molecular sieve catalyst by firstly processing a molecular sieve catalyst with an alkaline water solution and then washing the molecular sieve catalyst with an acid solution. By adopting the method, reaction between hydrogen sulfide and methanol can be effectively catalyzed, and methanol can have a higher conversion rate while higher selectivity of dimethyl sulfide can be obtained.

The invention discloses instant broccoli and lotus leaf tea capable of strengthening the brain and bone and a preparation method thereof. The tea is prepared from, by weight, 1-2 parts of roasted sesame seeds, 3-4 parts of smashed Chinese yam, 5-6 parts of broccoli, 1-2 parts of stigma maydis, 1-2 parts of poria cocos, 1-1.5 parts of white gourd kernels, 200-210 parts of lotus leaves and a proper amount of zinc ion solution, sodium erythorbate, beta-cyclodextrin, ethyl maltol and water. the roasted sesame seeds are ground, the broccoli is placed in a steamer to be steamed for 20-25 min, then the roasted sesame seeds are scattered, steaming continues for 5-6 min, then the mixture is mixed with smashed Chinese yam to be beaten into puree, the mixture is dried and ground into powder, broccoli is good in brain and bone strengthening effect, nutrients are diversified, and sensory quality is good.

The invention relates to the field of material synthesis, and discloses a composite material with a light hydrocarbon adsorption function, a preparation method of the composite material, a method for removing light hydrocarbons by using the composite material and application of the composite material. The composite material comprises an association structure formed by a polymer and a copper-based metal organic framework material loaded in the association structure, the weight ratio of the polymer to the copper-based metal organic framework material is 1: (1-15), and the polymer is selected from at least one of polyvinyl formal, polypropylene, polyethylene sulfone and polyamide. The composite material is stable in framework structure and has high mechanical stability, the pore volume, the pore diameter and the specific surface area of the composite material are large, the light hydrocarbon adsorption capacity is high, the method for preparing the composite material is simple and environmentally friendly, synthesis raw materials are low in price, and large-scale production and application are easy.

The invention discloses a preparation method a raney nickel catalyst suitable for slurry reactor methanation. The content of nickel in the raney nickel catalyst is 86wt%-95wt%, and the specific surface area of the raney nickel catalyst is between 85m<2> / g and 180m<2> / g. The raney nickel catalyst has the advantages of high intensity and activity and is suitable for slurry reactor methanation.