34results about How to "The preparation method is simple and controllable" patented technology

The invention relates to a preparation method of a supported Fe / La-MOF bimetal-based metal organic framework adsorption precipitant for high-phosphorus wastewater as well as a product and application of the supported Fe / La-MOF bimetal-based metal organic framework adsorption precipitant, a porous La / Fe bimetal-based adsorption precipitant with a large specific surface area is constructed by utilizing the structural advantages of an MOFs material, so that Fe and La are promoted to rapidly capture PO4 < 3-> in water, and rapid removal of phosphorus-containing wastewater is realized; in addition, efficient immobilization of the supported Fe / La-MOF material is achieved through simple hydrothermal impregnation, the problem that the powder material is difficult to recycle in the actual working condition is solved, solid-liquid separation can be rapidly achieved, the obtained sludge has the recycling value, the treatment cost of phosphorus-containing wastewater is effectively reduced, and the method has the large-scale application value.

The invention provides a composite microsphere wave-absorbing material and a preparation method thereof. The composite microsphere wave-absorbing material comprises carbonyl iron powder, a coupling agent layer and a graphite coating layer which are sequentially arranged from inside to outside, the coupling agent layer is adsorbed on the surface of the carbonyl iron powder through hydrogen bonds to form microspheres, and the microspheres are embedded into the graphite coating layer. According to the technical scheme, the light dielectric material graphite is coated with the carbonyl iron powder on the basis of bridge connection of the coupling agent layer, the microwave absorption performance is improved through the synergistic effect between magnetic and dielectric components, and the composite microsphere wave-absorbing material is light, broadband and excellent in wave-absorbing performance. And the preparation method is simple, convenient, controllable, low in cost, environment-friendly and pollution-free, and can be used for large-scale production.

The invention belongs to the technical field of hydrogen sensor preparation, and provides a preparation method of a high-moisture-resistance titanium dioxide homogeneous out-phase junction room-temperature hydrogen sensor, which comprises the following steps: S1, firstly, cleaning an FTO (Fluorine-doped Tin Oxide) substrate; s2, preparing a precursor reaction solution, and growing a titanium dioxide homogeneous out-phase junction film on the FTO substrate through a hydrothermal method; s3, carrying out annealing treatment on the titanium dioxide homogeneous out-phase junction thin film; s4, preparing an impregnation reaction precursor solution, and modifying Pt nanoparticles on the titanium dioxide homogeneous out-phase junction film through an impregnation method; according to the invention, the surface of the titanium dioxide homogeneous out-phase junction film is modified with Pt nanoparticles and coated with the ZSM-5 molecular sieve, so that the moisture resistance of the sensor and the hydrogen response performance at room temperature are improved, and the sensor can stably work in a humid environment; the preparation method disclosed by the invention is simple and controllable, is suitable for large-scale production, and has a relatively high practical application value.

This invention provides a carboxylated nitrile butadiene latex, its preparation method, and its application. The carboxylated nitrile butadiene latex, by mass parts, is composed of the following raw materials: butadiene, acrylonitrile, methacrylic acid, emulsifier, dispersant, electrolyte, ferrous sulfate, reducing agent, molecular weight regulator, oxygen scavenger, initiator, and demineralized water. The emulsifier is a mixture of anionic and cationic emulsifiers; the anionic emulsifier is sodium dodecyl sulfate, and the cationic emulsifier is a glycosyl gemini cationic surfactant. The mass ratio of the anionic emulsifier to the cationic emulsifier is 1:0.05–0.1. This carboxylated nitrile butadiene latex not only has low gel content and high mechanical stability, but its preparation method is also simple and controllable, making it easy for industrial production.

The invention discloses a gelled cell as well as a preparation method and application thereof. Relates to the field of synthetic biology and biomedicine. The gelated cell is a cell structure without cell viability, and comprises: a carrier cell framework comprising a cell membrane which retains the membrane protein content, the type and the lipid order of an original carrier cell; the intracellular hydrogel is formed in situ in the carrier cell framework through supramolecular host-guest interaction or cross-linking reaction, and is fused with the inner surface of a cell membrane; the antibacterial substance is loaded in the intracellular hydrogel; wherein pores are distributed on the cell membrane, the intracellular hydrogel is communicated with the external environment through the pores, and the loaded antibacterial substances are exposed. The gelated cell provided by the invention can simultaneously realize targeted delivery, contact sterilization and endotoxin adsorption, and avoids the problem of secondary inflammation caused by release of endotoxin in traditional antibiotic therapy and the problem of membrane protein loss or disordered arrangement in a cell membrane coating technology.

The invention provides a thermal debonding type single-component moisture-curing polyurethane hot melt adhesive and a preparation method thereof, and the thermal debonding type single-component moisture-curing polyurethane hot melt adhesive is mainly characterized in that thermal expansion microspheres with proper conditions and quantity ratio are introduced into a raw material system of a specific single-component moisture-curing polyurethane hot melt adhesive; in the bonding requirements of soft base materials such as leather and fabrics, a better bonding effect can be provided; in the recycling and reusing requirements of soft base materials such as leather and fabric, the adhesive layer can become fluffy under the specific temperature condition, and therefore the effects that the adhesive layer is damaged, and the base materials are effectively recycled are achieved. Meanwhile, the preparation method is simple, easy to control, mild in condition and suitable for large-scale industrial production.

A method for one-step preparation of methylamine by hydrogenation amination of carbon dioxide, belonging to the field of catalysis. In a fixed-bed reactor, carbon dioxide, hydrogen, and ammonia are reacted. The catalyst comprises a microporous or mesoporous silica support, and the active component includes indium, zirconium, and at least one metal promoter selected from nickel, copper, palladium, rhodium, and platinum; the In 3d... 5 / 2 The binding energy is 444.0~444.7 eV, which is more than 0.2 eV lower than that of pure indium oxide; the single-pass conversion rate of carbon dioxide is not less than 50%, the total selectivity of methylamine is not less than 80%, and the selectivity of the byproduct carbon monoxide is not higher than 20%. This invention constructs a unique In-Zr-M active center, with In, Zr, and M uniformly co-distributed at the nanoscale. By adjusting the NH3 / CO2 ratio, the ratio of dimethylamine to trimethylamine can be controlled. The catalyst of this invention exhibits excellent performance and good stability, and has broad application prospects in the fields of carbon dioxide resource utilization and green synthesis of methylamine.

The present invention relates to a catalyst for olefin polymerization, and discloses a catalyst component for olefin polymerization and a preparation method thereof, a catalyst and an olefin polymerization method. The catalyst component comprises: a magnesium compound selected from: ① a magnesium compound having a structural formula of MgR 1 R 2 ② Magnesium dihalide or its group R 6 OR 7 The replaced derivative; titanium compound; such as formula CX n H 3‑n COOCH2R 8 The halogenated acetate compounds shown in the formula, wherein R 8 The catalyst component is a hydrocarbon group or a halogenated hydrocarbon group with 1-8 carbon atoms, n is an integer of 0≤n≤3, and X is a halogen. The catalyst obtained by combining the catalyst component with an organic aluminum compound has high catalytic activity and hydrogen adjustment sensitivity in olefin polymerization applications, and can obtain a polymer with a higher melt index.

The invention discloses a sodium-ion battery positive electrode material and a preparation method and application thereof, and belongs to the technical field of sodium-ion batteries. The molecule of the positive electrode material is Na < 4 + x > Fe < 3 > (PO4) < 2 + y > (P2O7), wherein 0 lt; xlt; 1.3, 0 lt; yt; Yt; 1.3, 0 lt; x / y < lt >; 3. A fully activated Na < 4 + x > Fe < 3 > (PO4) < 2 + > y (P2O7) pure-phase structure is formed by regulating and controlling the stoichiometric ratio of sodium to phosphate radicals and filling a small amount of sodium ions, the positive electrode material does not need to add other metal elements and an additional synthesis process, the influence on the existing manufacturing process is extremely small, the ion and electron conductivity is improved due to the increase of the Na content, and the performance of the positive electrode material is greatly improved. Therefore, the specific capacity and rate capability of the positive electrode material are greatly improved, and the positive electrode material is suitable for large-scale production and application.

The present invention discloses a C / N‑NiCoMn‑LDH / Ag composite electrode material and a preparation method thereof, which are characterized in that the material comprises the preparation of a ZIF‑67 precursor and the preparation of a C / N‑NiCoMn‑LDH / Ag composite electrode material, and the crystallinity and surface active sites thereof are effectively regulated by introducing Mn and Ag elements, and the relatively low crystallinity of the material makes it have a high electrochemical reaction activity, and at the same time, the material is novel in that the sheet assembles a hollow cage structure, the multi-metal composition characteristics and the double-layer protection of nitrogen heteroatom-doped carbon are utilized to improve the electrochemical performance of the material. The method is scientific and reasonable, simple and controllable, and has strong applicability, and can efficiently prepare a composite electrode material with excellent electrochemical performance.

The invention belongs to the technical field of preparation of polymer semiconductor materials, and particularly discloses a method for preparing a polyheptylimide photocatalyst by using organic and inorganic mixed molten salt, which comprises the following steps of: mixing high-nitrogen small organic molecules serving as a raw material with organic molten salt and inorganic molten salt in a vacuum glove box to prepare a precursor; and then carrying out high-temperature solid-phase polymerization in an inert atmosphere, washing and drying to obtain the target polyheptazinyl imide catalyst. The organic-inorganic mixed molten salt system is adopted to replace traditional pure inorganic molten salt, directional synthesis of polyheptylimide is promoted through mixed molten salt microenvironment regulation and control, the carrier transport resistance is effectively reduced, and photo-induced electron-hole recombination is inhibited. The prepared polyheptylimide has excellent photocatalytic oxidation performance, can realize H2O2 preparation through O2 activation and organic dye mineralization under visible light driving, has the advantages of simple process, low cost and good stability, is convenient for large-scale production and practical application, and has important value in the fields of energy conversion and environmental governance.

The invention relates to a preparation method of a supported bimetallic (Zn, Fe)-TCPP photosensitive catalyst as well as a product and application of the supported bimetallic (Zn, Fe)-TCPP photosensitive catalyst, a metalloporphyrin ligand is utilized to regulate and control a microenvironment of MOF and a synergistic effect between a conjugated ligand of the MOF and metal centers Zn and Fe, so that photocurrent response is enhanced, and photo-induced electron-hole separation and transfer are accelerated. In addition, the synergistic effect between the double metals Zn and Fe can further promote the transfer of charges, and is beneficial to the improvement of the photocatalytic ability and the structural stability of the material. On the basis, the catalyst is further immobilized on a porous carrier, so that the contact area with pollutants can be increased, meanwhile, the supported catalyst can be quickly separated from water and is convenient to recycle, the problem that a powder catalyst is difficult to recycle and easily causes secondary pollution to a water body is avoided, and a product derived from the preparation technology has a large-scale application value.

This invention relates to the field of water treatment technology and provides a method for the dynamic regulation of diatomic species in organic wastewater treatment. The method includes the following steps: adding a GaCo / CN diatomic catalyst to organic wastewater containing pollutants, stirring in the dark to reach adsorption-desorption equilibrium, exciting the reaction using PMS and visible light, and then quenching the reaction by adding Na2S2O3. This invention constructs a GaCo diatomic catalyst based on dynamic bond oscillation regulation. Through the differentiated dynamic stretching oscillation of Ga-N and Co-N bonds during PMS activation, spatial decoupling and synergistic enhancement of the persulfate activation pathway are achieved, strengthening the activity of high-valent cobalt species and reactive oxygen species. 1 O2 and SO4• ‑ The directional generation of ) has high degradation efficiency and high selectivity for a variety of typical organic pollutants.

This invention discloses a ternary amorphous insulating dielectric film, its preparation method, and its applications. The ternary amorphous insulating dielectric film is composed of a material with the chemical formula Al(X)N, ​​where X is selected from any one or a combination of two or more of B, Si, Zr, and Zn. The ternary amorphous insulating dielectric film has a disordered amorphous structure. This invention uses pulsed laser deposition technology to prepare the ternary amorphous insulating dielectric film. The preparation method is simple and controllable. The prepared ternary amorphous insulating dielectric film exhibits high thermodynamic stability, high dielectric constant, and low leakage current density. It can serve as an insulating material resistant to repeated impacts from strong electric fields and high currents, and is heat-resistant, showing great promise for applications in the semiconductor field.

The application discloses a porous chromium-based composite denitration catalyst and a preparation method and application thereof, and belongs to the technical field of denitration catalyst preparation. The preparation method of the porous chromium-based composite denitration catalyst is as follows: a chromium salt, an organic ligand and an Anderson-type polyoxometalate are dissolved in water to perform a hydrothermal reaction to obtain a precursor; wherein the Anderson-type polyoxometalate is selected from one or more of (NH4)4[NiMo6O 24 H6]·5H2O, (NH4)3[CoMo6O 24 H6]·7H2O or (NH4)3[FeMo6O 24 H6]·6H2O; and the precursor is calcined, and the porous chromium-based composite denitration catalyst is obtained. Compared with a single MOF porous chromium-based catalyst, the denitration efficiency of the porous chromium-based composite denitration catalyst can be increased by more than 90%. Meanwhile, the preparation method is simple, easy to control, low in requirement on a synthesis device, can save the amount of active components, reduces the production cost of the catalyst in an all-round way, and is suitable for large-scale industrial production.

The invention relates to a negative electrode material and a preparation method thereof, a battery and an electronic device, the preparation method comprises the following steps: dissolving zinc nitrate hexahydrate in a first solvent to obtain a solution A; dissolving 2-methylimidazole in a second solvent to obtain a solution B; adding the solution B into the solution A to obtain an intermediate A; reacting the intermediate A with dopamine in the presence of alkali to obtain an intermediate B, carbonizing in a first protective gas atmosphere to obtain an intermediate C, and reacting in the presence of acid to obtain an intermediate D; adding the intermediate D into water, and adding a molybdenum source to obtain a solution C; adding a reducing agent and a selenium source into water to obtain a solution D; adding the solution D into the solution C for hydrothermal reaction to obtain an intermediate E; and performing high-temperature annealing treatment on a sulfur source and the intermediate E in a second protective gas atmosphere to obtain the negative electrode material. Comprising the negative electrode material is stable in negative electrode structure, has excellent capacitance and also has excellent cycle performance under high flow density.

The present application provides a kind of ordinary electrochemical aluminum stamping foil water-based release agent and its preparation method.The water-based release agent includes the following weight parts of raw materials: water-based polyurethane emulsion 50-60 parts, water-based acrylic modified polyurethane emulsion 25-35 parts, silane coupling agent 2-8 parts, filler 2-6 parts, wax emulsion 2-5 parts, fluorosilicon auxiliary agent 2-7 parts, polyethylene glycol 1-3 parts and crosslinking agent 1-3 parts.The water-based release agent has good chemical solvent resistance, temperature resistance, is suitable for the peeling strength and printing adaptability requirements of ordinary electrochemical aluminum stamping foil first stamping then printing process to release agent, is environment-friendly.The preparation method of the water-based release agent is simple and easy to control, process is stable, production is efficient, is conducive to large-scale production.

The invention discloses a PtPdCuFe alloy nano enzyme material, and belongs to the technical field of nano materials and analytical chemistry. According to the technical key points, four metal atoms of platinum, palladium, copper and iron are uniformly distributed on the nanoscale to form an alloy structure, and the unique quaternary composition and atomic-scale mixing generate a synergistic effect, so that the catalyst has excellent oxidase-like and peroxidase-like activities at the same time. The invention also discloses a colorimetric sensor containing the material, and a method for detecting in a buffer system through catalytic oxidation and coupling with nitrite by using the oxidase-like activity of the material. According to the method, the peroxidase-like activity of the material is utilized, and TMB oxidation is inhibited through thiophanate-methyl in the presence of hydrogen peroxide for detection. The invention further discloses a method for synthesizing the quaternary alloy material through a one-step hydrothermal method. The method is mainly used for high-sensitivity and high-selectivity rapid colorimetric analysis of nitrite pollutants and thiophanate-methyl pesticide residues in food and environmental samples.

The invention discloses a composition containing trace elements and application of the composition to improvement of depression, and relates to the technical field of anti-depression products. The composition is prepared from the following raw materials: radix bupleuri, rhizoma acori graminei, radix paeoniae alba, hypericum monogynum, radix rehmanniae, stevia rebaudiana, radix saussureae lappae, semen boitae, common fenugreek seed, cortex cinnamomi, fresh ginger, liquorice root, magnesium oxide, zinc oxide, sodium selenite, probiotics, folic acid and pantothenic acid. Effective components of the traditional Chinese medicines are extracted, and the purpose of treating depression is achieved by means of soothing liver-qi stagnation, tonifying qi, promoting blood circulation and regulating blood, lowering lipid and blood sugar and the like; meanwhile, nutrient elements and trace elements are added into the traditional Chinese medicine extracts, so that the traditional Chinese medicine extracts have a synergistic effect, the depression-like behavior of mice can be effectively improved, the abnormal change of monoamine substances of the depression mice can be improved, and a relatively good depression treatment effect is shown.

The invention provides an electrocatalyst as well as a preparation method and application thereof, a high-performance nitrogen-doped carbon-coated bimetallic phosphide multi-shell hollow structure electrocatalyst (Ni2P-coated CoP-coated NC) is successfully prepared by optimizing the structure and composition of a material, and the technical bottleneck in the field of electrocatalytic water decomposition is solved. Firstly, a unique hot solvent method is combined with an external coating and etching technology, gradual construction from Ni-gly yolk shell microspheres to Ni-gly ZIF-67 and then to a multi-shell hollow structure is achieved, and finally the Ni2P-CoP-NC compound is formed through calcination. Secondly, due to introduction of a nitrogen-doped carbon shell of the electrocatalyst, the overall conductivity of the composite material is effectively improved through a multi-shell hollow structure, rapid transmission of electrons in the catalysis process is ensured, energy loss is reduced, and therefore the catalysis efficiency is improved; the electrocatalyst shows excellent catalytic activity in the electrolytic water decomposition process, the reaction overpotential can be remarkably reduced, and the reaction rate is increased.

The invention belongs to the field of traditional Chinese medicines, and particularly relates to traditional Chinese medicine formula granules for treating perimenopausal female sleep disorder and a preparation method thereof. The traditional Chinese medicine formula granules are prepared from the following raw materials in parts by weight: 3 to 5 parts of nacre mother of pearl, 8 to 10 parts of raw oyster, 3 to 5 parts of semen boitae, 3 to 4 parts of honey-fried licorice root, 3 to 5 parts of glossy privet fruit, 3 to 5 parts of herba ecliptae, 3 to 5 parts of raw spina date seed, 8 to 10 parts of tortoise shell, 8 to 10 parts of radix salviae miltiorrhizae and 3 to 5 parts of radix angelicae sinensis. According to the traditional Chinese medicine formula granules, kidney tonifying, blood activating and heart and kidney traffic are effectively fused, and the effects of lightly dispersing pathogenic qi of intangible deficiency heat and expelling tangible and gummy blood stasis are effectively combined. In combination with the physiological characteristics of seven-seven women, water-fire balance of heart and kidney is regulated, and yin-yang harmony of mind is relieved; in addition, the preparation method is simple and easy to control, and large-scale production is facilitated; and finally, the medicine prepared by the invention is granules, is convenient to take after being mixed with water, and can benefit more female patients.

The present invention discloses a multi-walled carbon nanotube-supported high-entropy alloy catalyst, its preparation method and application. The high-entropy alloy catalyst consists of a multi-walled carbon nanotube support and high-entropy alloy nanoparticles supported on the surface of the multi-walled carbon nanotube support. The high-entropy alloy nanoparticles are composed of five metal elements, namely Fe, Co, Ni, Pt, and In, to form a thermodynamically stable FeCoNiPtIn high-entropy alloy solid solution phase. The high-entropy alloy nanoparticles are anchored on the surface of the support through chemical bonding and have a delocalized electron structure formed by d-p / d-d / sp hybridization. The catalyst prepared according to the method of the present invention exhibits excellent activity and durability in the hydrogen evolution reaction, can achieve long-term stable operation, and provides a reliable and efficient preparation technology solution with excellent performance for the large-scale industrial promotion of the electrolytic water hydrogen evolution reaction.

This invention discloses a two-dimensional porous silicon, its preparation method, and its application in lithium batteries, belonging to the field of materials technology. The silicon-calcium alloy powder is immersed in hydrochloric acid solution, and after the reaction is complete, it is filtered and dried to obtain siloxane powder. The siloxane powder is then heat-treated in a vacuum environment, during which the siloxane is first oxidized to SiO. x SiO x Further high-temperature processing leads to a disproportionation reaction, generating uniformly distributed two-dimensional Si / SiO2. The two-dimensional Si / SiO2 is then immersed in a hydrofluoric acid solution, where the hydrofluoric acid reacts with the SiO2. After complete reaction, the mixture is repeatedly centrifuged and washed, then vacuum dried to obtain a two-dimensional silicon material with a porous structure. The preparation method of this invention is simple, controllable, and highly practical. The two-dimensional porous silicon prepared by this method possesses a crystalline structure and an ultrathin layered structure, which can effectively mitigate volume changes in the negative electrode material and accelerate lithium-ion diffusion when used in lithium-ion batteries.

The invention relates to the technical field of catalysts, in particular to a cobalt-based phosphide nano catalytic material as well as a preparation method and application thereof. The preparation method comprises the following steps: dissolving a cobalt salt, urea and ammonium fluoride in water to obtain a mixed solution, placing a pretreated carbon cloth in the mixed solution, carrying out a hydrothermal reaction, taking out the carbon cloth to obtain a carbon cloth-loaded phosphating precursor, and carrying out hydrothermal reaction on the carbon cloth-loaded phosphating precursor in a protective atmosphere to obtain the carbon cloth-loaded phosphating precursor. Carrying out phosphating treatment with a phosphorus source; and carrying out constant piezoelectric deposition by taking the carbon cloth loaded cobalt phosphide as a working electrode and cobalt salt as an electrolyte to obtain the cobalt-based phosphide nano catalytic material. The cobalt-based phosphide nano catalytic material shows excellent catalytic activity, rapid reaction kinetics and good stability in HER, OER and full water splitting application, the preparation method is simple and controllable, the cobalt-based phosphide nano catalytic material is expected to replace a noble metal-based catalyst, and the cobalt-based phosphide nano catalytic material has a wide application prospect in the field of electro-catalysis energy conversion.

The application discloses poplar phellinus polysaccharide SVP-50-1 and a preparation method and application thereof, and belongs to the field of biological medicines.The poplar phellinus polysaccharide SVP-50-1 is obtained by water extraction and 50% ethanol solution precipitation of poplar phellinus fruiting bodies.The poplar phellinus polysaccharide SVP-50-1 can regulate a tumor metabolic process, inhibit the activity of a tumor cell mitochondrial respiratory chain and an oxidative phosphorylation process, thereby inhibiting the energy source of tumor cells, and achieving an anti-tumor effect.The poplar phellinus polysaccharide SVP-50-1 can play a synergistic effect when combined with radiotherapy and chemotherapy drugs.The combined treatment strategy can significantly improve the curative effect of an existing tumor treatment, while reducing adverse reactions, and provides a new optimized scheme for clinical tumor treatment.

This invention belongs to the field of high-pressure jet cutting nozzle manufacturing technology, specifically relating to a cemented carbide for jet abrasive nozzles and its preparation method. The cemented carbide for jet abrasive nozzles includes a cemented carbide matrix and a boride coating. The composition of the cemented carbide matrix is: 1wt%~3wt% cobalt, 3wt%~12wt% molybdenum carbide, 3wt%~10wt% tantalum carbide, 1wt%~3wt% chromium carbide, with the balance being tungsten carbide and unavoidable impurities. The average grain size of the tungsten carbide is 0.2~0.6μm. This invention prepares a high-strength and tough cemented carbide matrix by using a low-cobalt ultrafine-grained cemented carbide with a specific composition and a gas pressure sintering process. Then, a TiB2 superhard coating with a strong (001) texture is deposited on its surface by a controllable chemical vapor deposition technology, achieving a unity of ultra-high coating hardness and extremely high interfacial bonding force, and finally obtaining a jet abrasive nozzle composite material with excellent wear resistance, long service life, and stable performance.

The invention discloses a solid electrolyte, a preparation method thereof and a battery. The preparation method comprises the following steps: mixing a surfactant and a cosurfactant in an oily solvent to obtain a first solution; the solid electrolyte comprises at least one metal element, and inorganic salt containing the metal element and citric acid are mixed in water to obtain a second solution; mixing the first solution and the second solution to obtain a third solution; performing first heating treatment on the third solution to obtain a precursor of the solid electrolyte; the precursor is subjected to second heating treatment, the solid electrolyte is obtained, and the temperature of the second heating treatment is higher than that of the first heating treatment. Therefore, the solid electrolyte which is relatively high in purity, relatively good in chemical uniformity, relatively small in particle size, relatively good in uniformity and regular spherical in shape can be obtained, the preparation method is simple and controllable, the problem that a lithium element cannot be co-precipitated when the solid electrolyte is prepared by a reverse microemulsion method is solved, and large-scale production is easy to realize.

The invention discloses a method for preparing high-stability perovskite crystals through room-temperature spontaneous reaction, which comprises the following steps: mixing halide salt AX, halogenated metal BX2 and catalyst amino salt according to a certain proportion, and then adding a carbonic ester solvent into the mixed powder; a spontaneous chemical reaction between carbonic ester and a catalyst amino salt is utilized to induce a chemical reaction between halide salt AX and halogenated metal BX2 under a room temperature condition, and finally a high-quality and high-stability perovskite crystal is obtained. According to the method, the high-quality perovskite microcrystal can be obtained at room temperature, the limitation that conditions such as long-time high temperature and acidity are needed for preparing the perovskite microcrystal at present is broken through, and large-scale industrialization is facilitated. The high-quality and ultrahigh-stability perovskite crystal powder obtained by the method can be widely applied to the photoelectric fields of batteries, luminescence, detectors and the like.

The application provides a phosphate-modified polyester resin and a preparation method and application thereof, and a coating, and belongs to the technical field of industrial coatings.The phosphate-modified polyester resin has a main chain and a side chain containing phosphate groups.The P atom of the phosphate group has a large electronegativity, so that the phosphate-modified polyester resin has a large polarity and the phosphate group contains a hydrocarbon group, which makes the phosphate-modified polyester resin have good wettability;the phosphate group has strong acidity, can be chemically bonded with metal ions on the surface of a coated substrate, generates an organic metal phosphate, and forms an organic metal phosphate film, so as to form a "chemical bridge" between the surface of the substrate and the coating, which greatly improves the adhesion between the coated substrate and the coating, so that the surface of the coated substrate can be directly coated without chemical pretreatment when the powder coating is sprayed, thereby improving the spraying efficiency, saving the cost, and reducing the environmental pollution.

This invention provides a polyurethane, its preparation method, and its applications. The polyurethane has the following structure: where n is 5-500. The polyurethane of this invention exhibits both narrow dispersibility and good biocompatibility, thus it can be used as a medical and health material and food packaging, and has potential application value in fields such as drug delivery, gene transfer, tissue engineering, and regenerative medicine.