66 results about "Thermosynthesis" patented technology

The invention discloses a preparation method of a skutterudite group thermoelectricity lump material, which adopts the combination of solvent thermosynthesis and vacuum melting. In the skutterudite MSb3, M equals to Co, Rh, and Ir, comprising the skutterudite MSb3; M bits or Sb bits-doped MSb3; Ag, Cu, Zn, Cd, Pb, Sn, Ga or In-filled MSb3; doped and filled MSb3 and MSb3 which is compounded with a second phase. The preparation method comprises the steps of: material blending, thermal reaction of the solvent, washing, thermal treatment and sealing melting. The invention discloses a preparation method of a skutterudite group thermoelectricity lump material compounded with the second phase, when adopting the method, second phase nano powder such as ZrO2 with the mass percentage of 0.05 percent to 5 percent is added for supplement in the step of the material blending. Compared with the existing commonly used spark plasma sintering or hot pressed sintering after simple substance mechanical alloying, or the plasma sintering or the hot pressed sintering after long-time high temperature solid phase reaction of the simple substance materials, the obtained materials are more compact and lower in cost.

The invention discloses a microchannel flow method for quickly synthesizing uniform ZIF-8 nanoparticles. The method comprises the following steps of: filling 50ml of 0.6M dimethylformamide (DMF) solution of methylimidazole and 50ml of 0.2M DMF solution of Zn(NO3)2.6H2O in two injectors, feeding the two solutions into a tee mixer at a certain speed by using an injection pump at the temperature of 80DEG C, fully mixing the two solutions, introducing into a capillary quartz tube microchannel, and collecting the nano-scale ZIF-8 product at an outlet. Compared with the traditional solvent thermosynthesis method in a reactor, the method has the advantages of greatly shortening reaction time and saving energy. The synthesized ZIF-8 nanoparticles have small average particle size of about 50nm, and have the typical hexagonal structure. Moreover, by controlling reaction temperature, retention time and a reaction material ratio, the ZIF-8 nanoparticles with required size can be easily prepared continuously.

The invention discloses a method for preparing nanometer foam stannic oxide of a lithium ion battery cathode material, which is characterized in that SnC14.5H2O solution is mixed with carbon ball solution which is prepared with a hydrothermal synthesis method under the ultrasonic treatment condition, hydrothermal synthesis reaction is proceeded to obtain a foam stannic oxide precursor, solid phase sintering of the foam stannic oxide precursor is undertaken to obtain the nanometer foam stannic oxide (or foam stannic oxide/carbon composite material) with good dispersibility and uniform distribution of aperture. The method can enlarge the application range of the stannic oxide; and on the basis of the hydrothermal synthesis and solid-phase segmentation method, with the method of the ultrasonic treatment, the entire reaction process is simple and is free from toxic substances or environmental pollutants, the method is environment-friendly and belongs to an environment-friendly chemical preparation method; and moreover, the method can realize the mass production, and the required chemical agent is inexpensive and is easy to buy.

The invention discloses a method for preparing lithium iron phosphate serving as a lithium ion battery cathode material in an ionic eutectic mixture, which belongs to the technical field of preparation of electrochemical power supply materials. In the method, an ionic eutectic mixture obtained by compounding urea/carboxylic acid/alcohols with a quaternary ammonium salt and organic amine or an organic alkali serving as a regulating agent is taken as a reaction solvent as well as a template agent, and pure-phase lithium iron phosphate with high crystalizing performance is directly obtained with an ionic thermosynthesis method. Compared with synthesis of lithium iron phosphate by taking an imidazole ionic liquid as a solvent, the method has the advantages of higher easiness in designing and synthesizing quaternary ammonium cations with excellent template functions in the ionic eutectic mixture, effective adjustment and control of physical and chemical properties through a donor of hydrogen bonds, low-price and readily available raw materials, environmental compatibility, biodegradability, insensitivity to water and greater convenience for using; compared with synthesis of lithium iron phosphate with a high-temperature molten salt method, the method has the advantage of lower melting temperature of the ionic eutectic mixture; and compared with synthesis of lithium iron phosphate with a hydro-thermal method, the method has the advantage of higher safety due to extremely low steam pressure. The invention provides a novel method for preparing a lithium iron phosphate cathode material. The method has a wide application prospect in the field of lithium ion battery cathode materials.

The invention relates to a preparation method for a manganese phosphate lithium nanosheet. According to the preparation method, glycol and water are used as a solvent, and polyethylene glycol is introduced, so that the formation of crystal nucleus and the growth of crystal are influenced, and as a result, the thermosynthesis of the solvent of the manganese phosphate lithium nanosheet can be achieved. The preparation method comprises the following steps of: dissolving ascorbic acid in the water/glycol solvent; then dissolving into phosphoric acid and manganese acetate in sequence; dropwise adding the water/glycol solution of manganese acetate to the previous solution containing phosphoric acid, lithium acetate and ascorbic acid; then introducing proper polyethylene glycol; fully mixing to obtain a precursor for water/solvent thermal reaction; transferring the precursor into a reaction kettle system to be sealed; thermally processing at 160 to 240 DEC G; and carrying out thermal reaction to the solvent to obtain the manganese phosphate lithium nanosheet. By adopting the preparation method, products are stable in quality, high in purity and high in dispersion of particles; the lithium ions can be dispersed well; the electrochemical performance of a lithium ion battery can be improved; and the preparation method is simple in technical process, easy to control, free of pollution, low in cost, and easy for mass production.

The invention discloses a diaphragm sealing method of a lithium ion battery. The technology proposal is that both two sides and the periphery of an anode plate and a cathode plate are wrapped by polyethylene and polypropylene diaphragm, the length and the width of the diaphragms can be first cut into a size larger than the anode plate and the cathode plate, the two sides of the anode plate or the cathode plate are surrounded by the diaphragms, and then the extending part of the diaphragm is combined together by thermosynthesis; or the diaphragms are prepared into pockets, the anode plate or the cathode plate is put into the pockets and the mouths of the pockets are sealed. The sealing method of the invention is used in the preparation of lithium ion batteries; as the diaphragms wrap the periphery of the anode plate and the cathode plate, the diaphragms can not shrink when the temperature of the battery rises so as to avoid the accident as a result of short circuit of the anode plate or the cathode plate, thereby improving the safety and reliability of the lithium ion battery in high temperature.

The invention especially relates to a preparation method for a metallic element-doped iron oxide nanorod catalyst with photoelectrocatalytic performance, which belongs to the technical field of catalysis. The preparation method comprises the following steps: preparing iron oxyhydroxide with a nanorod structure by using a solution thermosynthesis method; and calcining a sample in a certain atmosphere so as to obtain a metallic element-doped iron oxide nanorod with a same structure. An iron oxide doped nanostructure prepared by using a hydrothermal method has uniform morphology, shows absorption characteristics in a visible light zone and catalyzes photoelectrocatalysis of water under radiation of UV visible light. The solution thermosynthesis method enables the doping degree, morphology and size of a prepared sample to be controllable. The method is simple and easily practicable; and the prepared metallic element-doped iron oxide nanorod catalyst has good application potential in fields like photoelectrocatalysis and electrochemical catalysis.

The invention relates to the field of heavy metal and advanced functional materials, in particular to a cadmium-organic coordination polymer Cd5-MOF, and a preparation method and application thereof.The composition of Cd5-MOF is {[Cd5(Hodp)2(H2odp)2(bpeb)5(H2O)2](bpeb)2(H2O)2}n, the Cd5-MOF is prepared with a solvent thermosynthesis method, so that product heat stability is good, and yield can reach 75%. The method has the advantages of moderate condition, easiness in operation and high yield. The Cd5-MOF coordination polymer is doped in organic glass, the doped organic glass can be used foradsorbing ultraviolet light and emitting green fluorescence, and the property of the coordination polymer and the preparation method can be used for preparing light transformation materials or green fluorescence acrylics.

The invention discloses an application of a carbon quantum dot-graphite phase like carbon nitride photocatalytic material to preparation of medicines capable of killing bacteria and promoting skin cicatrice healing. A preparation method of the material comprises the following steps of placing urea at the temperature of 500-600 DEG C for calcination so as to obtain graphite phase carbon nitride powder; enabling citric acid and ethylenediamine to dissolve in water, performing a hydrothermal synthesis reaction at 180-200 DEG C, performing cooling, and performing drying so as to obtain carbon quantum dot powder; and mixing the carbon quantum dot powder with water, adding the graphite phase carbon nitride powder to mixed liquor, performing stirring and macerating at the temperature of 15-60 DEGC for 12-24 hours, and performing drying so as to obtain the catalysis material. According to the application disclosed by the invention, an in vitro staphylococcus aureus infection model and an in vitro staphylococcus aureus infection model are constructed, the inventor finds that the carbon quantum dot-graphite phase like carbon nitride photocatalytic material prepared by a specific method hasmore photocatalytic reaction active sites, is higher in photocatalytic activity and is obvious in the effect of killing staphylococcus aureus.

The invention relates to a preparation method of a strontium titanate nanometer piece. According to the invention, butyl titanate is taken as a titanium source, strontium nitrate is taken as a strontium source, and ammonia water is taken as a precipitating agent. The preparation method comprises the following steps of: firstly, adopting ammonia water to deposit titanium salt so as to obtain titanic hydroxyl hydrogen oxide deposition to be as a solvent hot reaction material with the strontium nitrate, using glycol as a reaction system solvent to form a solvent thermosynthesis perovskite structure strontium titanate self assembly nanometer piece at 150 DEG C-240 DEG C. The preparation method provided by the invention has the advantages of simple technical process, no pollution, low cost, and is easy to control and is easy to perform large-scale production; the crystallizing quantity of the prepared product is stable, and the specific area is large; and the preparation method has wide application prospect on the fields such as electro-optical devices, memory devices, oxygen sensors, photocatalysts, solar batteries and the like.

The invention provides a preparation method of a medium temperature desulfurating agent, belonging to the field of the preparation of desulfurating agent and gas purification in coal chemical industry technology application, in particular relating to a method for preparing medium temperature desulfurating agent by utilizing subcritical and supercritical water. The invention is characterized in that carrier materials are carried with metal oxide with desulfurization activity by utilizing a thermosynthesis reaction between subcritical water and supercritical water and strong infiltration effect of subcritical and supercritical water. In the invention, a medium temperature desulfurating agent with the characteristics of high desulfurization precision, good cycling stability, high mechanical strength and the like is prepared within a temperature range of 250-450 DEG C by fully utilizing the characteristics of subcritical and supercritical water; the invention has little contamination on the environment, has simple technology, and can be applied to the removal of H2S in medium temperature coal gas or natural gas.

The invention provides a preparation method of a copper vanadate material (CuVO). The preparation method is characterized in that the material is obtained through ionic liquid thermosynthesis and preparation under the temperature condition of 100-180 DEG C and at atmospheric pressure in a solvent such as ionic liquid or a eutectic mixture by taking vanadium pentoxide or metavanadate and copper salt as raw materials. The synthetic method is operated at ordinary pressure, safe, simple and convenient, and is low in equipment requirement. The copper vanadate material prepared by the method has sheet-like or flower-like specific morphology, and is higher in specific surface area. The material has higher electrode charging and discharging specific capacity, and can be used for an electrode material for lithium ion batteries.

The invention discloses a method for preparing a tin dioxide nanostructure material with a floriform appearance by hydrothermal synthesis, which comprises the following steps: adding tin dichloride powder to a mixed solvent of ethanol and water to prepare a solution reaction system containing tin ions; then adding an ammonia-water solution with the mass concentration of 25%-28% to the solution reaction system and stirring evenly to obtain a reaction precursor; and heating the precursor in a polytetrafluoroethylene reaction kettle by a hydrothermal method, and changing the heating temperature and time of a muffle to obtain the tin dioxide nano-materials with different appearances. The invention can lower the reaction cost and improve the production efficiency of the tin dioxide nano-material, and the prepared nano-material has the advantages of controllable appearances, high purity, good performance, large specific area, good repeatability, and the like and greatly improves the performance of a battery when used as a cathode material of a lithium-ion battery.

The invention discloses a method for synthesizing hydroxyapatite with chalk (calcium carbonate) as a raw material, which comprises the step of allowing hydrothermal synthesis reaction between chalk and ammonium hydrogen phosphate aqueous solution under normal pressure in a 60-95 DEG C water bath for 24-96 hours to obtain a hydroxyapatite product. The inventive method has the advantages of normal pressure reaction, rapid reaction speed, low reaction temperature, high yield, and rich raw material resources. The obtained product retains the microstructure original chalk, can be used as an active bioceramic layer, a metal-based or glass-based biomaterial layer, or a matrix or an enhancement body of biological composite materials, can absorb toxic positive ions in wastewater, and can be used as a catalyst carrier or a drug sustained-release carrier.

The invention discloses a method for preparing a nitrogen-doped titanic acid nano tube by a hydrothermal cosolvent method, which relates to a method for preparing a nitrogen-doped titanic acid nano tube. The method solves the problems of poor stability of the titanic acid nano tube obtained by the conventional hydrothermal synthetic method and poor effect of degrading organic pollutants through photocatalysis. The method comprises the following steps: firstly, putting titanium dioxide into sodium hydroxide solution and triethanolamine to perform hydrothermal reaction so as to obtain a reaction product; secondly, cleaning the reaction product, and then drying the reaction product in vacuum; and thirdly, thermally treating the reaction product in a muffle furnace to form the nitrogen-doped titanic acid nano tube. The method adopts the triethanolamine as a reaction raw material to generate the nitrogen-doped titanic acid nano tube having good thermal stability and complete tube wall and containing an H2Ti2O5H2O crystalline substance; and the catalytic rate constant shown by the nitrogen-doped titanic acid nano tube for degrading methyl orange is 0.00921, which is 9 times of the catalytic rate constant (0.00109) shown by the nano titanium dioxide for degrading the methyl orange.

The invention relates to a preparation method of a three-dimensional carbon-boron nitride nanometer material. The preparation method adopts a three-step synthesis method, comprising the following steps: step 1, preparation of precursor colloid of diboron trioxide triethanolamine through thermosynthesis of solvent; step 2, preparation of precursor powder of melamine hypoboric acid through synthesis by a hydrothermal method; step 3, mixing of the precursor obtained in step 1 with the precursor obtained in step 2, uniform grinding and high temperature pyrolysis under reaction atmosphere, so as to obtain the three-dimensional carbon-boron nitride nanometer material with high specific surface area and uniform morphological structure. The preparation method has the advantages of low cost, high yield, no pollution, strong application and the like, and a novel three-dimensional carbon-boron nitride nanometer material with high specific surface area, high quality, high purity and high performances of both carbon and boron nitride, which can not be obtained by the existing method, can be obtained by the preparation method disclosed by the invention.

The invention discloses a method for using a solvent to carry out thermosynthesis so as to obtain nanorods of lanthanum phosphate; the method comprises the following steps of: mixing a lanthanum chloride solution with the concentration of 1.0-2.0mol/L and a sodium phosphate solution with the concentration of 1.0-2.0mol/L, wherein, the sodium phosphate and the lanthanum chloride have equal molar ratio; adding an n-butanol solvent and leading the volume ratio of water and the n-butanol to be 0.5 to 2 : 1 with the molar concentration of the lanthanum chloride in the mixed solution being 0.2 to 0.5mol/L; stirring the mixture till the mixture is even; adjusting the PH value of the solution to be 3 to 6 by phosphoric acid and hot reaction is carried out for 6.0 to 48 hours under the condition that the temperature is 140 to 220 DEG C. The synthetic method of the invention is simple, environment-friendly, green and economical, low-temperature, without needing calcination, and can obtain products directly in the solution; the obtained lanthanum phosphate has high purity, belongs to the monoclinic crystal system and is the nano rod with monazite structure; the nano rod has the diameter of less than 10nm, even fineness, single appearance and good dispersity.

The invention belongs to the field of function coordination polymer materials, and relates to a fluorescent coordination polymer material for adsorbing malachite green dye and a thermal synthesis method thereof. 1, 3-bis(4 '-carboxyl phenoxy) benzoic acid (called H3cpbda for short) and 1,2-bis(4-pyridine)-ethane (called bpa for short) are mainly used as organic ligand raw materials to react with metal cadmium salt and the like, and the novel coordination polymer material with fluorescence and dye adsorption performance is prepared through the improved step-by-step preprocessed solvent thermal synthesis method. The fluorescent coordination polymer material has the advantages of being high in synthesis yield, purity and crystal quality.

The invention discloses a preparation method of a micron-scale flower-like composite metal oxide, relating to a solvent thermosynthesis method of a spinel composite oxide micron flower material. The preparation method comprises the following steps of: with a metal salt as a raw material and glycol as a solvent, adding a surfactant and sodium acetate, and carrying out solvent thermal reaction in a closed container under the condition of 120-220 DEG C to form the micron-scale flower-like composite metal subcarbonate; and with the subcarbonate as a precursor, controlling a temperature rise speed and heating to 300-700 DEG C, and annealing to prepare the corresponding composite metal oxide micron-scale flowers. The preparation method disclosed by the invention has the advantages of simple process, low cost, stable product quality, easiness in control and good process repeatability and can be widely applied to the fields, such as lithium ion batteries, catalysis and the like.

The invention discloses an ultrasonic assisted thermosynthesis method for preparing nano potassium tantalate niobate powder. The method comprises the following steps: (1) putting alkali liquor prepared from sodium hydroxide and potassium hydroxide in an ultrasonic assisted hydrothermal device; and (2) adding solid oxide consisting of niobium pentaoxide and tantalum oxide to the alkali liquor prepared in the step (1) for reaction. By using the method, the electromechanical properties of the system are greatly improved; and the nano potassium tantalate niobate powder can be used for preparing the lead-free piezoelectric ceramic of the system, wherein the lead-free piezoelectric ceramic is expected to replace lead zirconate titanate series piezoelectric ceramic, is environment-friendly, has more environment-friendly production process and has a good commercial value.

A device for thermal transformation of one or a plurality of reagents into at least one needed product comprises an axial reactor, a torch part and an injector part, wherein the axial reactor comprises an inlet end, an outlet end, a reaction zone arranged between the inlet end and the outlet end, and a reactor inlet arranged on the inlet end; the torch part is constructed to generate thermal gas; and the injector part is inserted between the torch part and the axial reactor and comprises a thermal gas inlet and at least one reagent inlet.

The invention provides a preparation method of spherical tin-doped indium oxide nanopowder. The method comprises the steps: (1) weighing a water-soluble indium salt and dissolving the water-soluble indium salt in deionized water, adding a tin salt serving as a doping agent, and fully stirring at room temperature to obtain a mixture solution; (2) adding ammonia water or an ammonia salt into the mixture solution to regulate a pH value to be 9-11 to generate a precursor; (3) transferring the precursor into a reaction kettle, and carrying out hydrothermal synthesis reaction for 3-120 hours at the temperature of 260-360 DEG C to obtain a reaction product; and (4) cooling the reaction product in the reaction kettle to room temperature, and then cleaning the reaction product with the deionized water and drying, thereby obtaining the spherical tin-doped indium oxide nanopowder of nanometer particle diameter. The tin-doped indium oxide nanopowder prepared by using the method disclosed by the invention is spherical in appearance and has the average particle size of being 20-400nm.

The invention relates to a method of preparing a solid composite biological fertilizer from traditional Chinese medicine dregs. The method includes a step of insolating the traditional Chinese medicine dregs, a step of subjecting a part of the traditional Chinese medicine dregs to pyrolysis to obtain traditional Chinese medicine dreg ash, a step of crushing a part of the traditional Chinese medicine dregs, sieving with a sieve having a size of 100 meshes and performing ammonia gas explosion, a step of subjecting a part of the traditional Chinese medicine dregs to degradation through a hydro-thermal synthesis manner, a step of fully stirring the traditional Chinese medicine dreg ash, a product of ammonia gas explosion, a product of the hydro-thermal synthesis and water according to a ratio of 10%, 60%, 20% and 10% and adjusting pH to 5.0, a step of performing moist heat sterilization and cooling, and a step of separately inoculating trichoderma harzianum Tri-5 and bacillus subtilis Tu-100, performing solid fermentation and air-drying to obtain the fertilizer. The fertilizer is plastic in shape and can be prepared into powder, blocks, and the like. The fertilizer increases soil nutrients and organic matter contents, improves field soil structures, increases the number of microbial population and activity of some enzymes in soil and promotes yield increasing and income increasing of crops.