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Conducting-polymer dipped and coated lithium-ion battery composite-electrode material and preparation method thereof
InactiveCN102522563ADon't need protectionReduce energy consumptionHybrid capacitor electrodesLi-accumulatorsDischarge efficiencyConductive polymer
The invention provides a conducting-polymer dipped and coated lithium-ion battery composite-electrode material and a preparation method thereof. A high-polymer conducting polymer is coated on the lithium-ion battery electrode material of the composite electrode material, the conducting polymer is the conducting polymer which is easily dispersed into an aqueous solution, and the aqueous solution of dispersants, such as polystyrolsulfon acid and the like is used as a dispersing medium. The composite electrode material is prepared through the following steps of: dipping a lithium-ion anode material or cathode material into the aqueous solution of the high-polymer conducting polymer, and obtaining the surface-coated lithium-ion battery composite-electrode material through dipping and coating processing. The composite electrode material has cheap preparation raw materials, the surface of the novel composite electrode material is uniformly coated, and the composite electrode material has the advantages of high specific capacity, high charging and discharging efficiency and long cycling life. Compared with the prior art, the preparation method of the composite electrode material has the advantages of simple process, low cost, good effect and green and environment-friendly production process, is easy for industrial popularization and is convenient for large-scale industrialized production.
Owner:GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
Method for preparing large size lead halide cesium perovskite crystal
InactiveCN106938854ADon't need protectionScalable productionFinal product manufactureLead compoundsPhotodetectorCrystal structure
The invention discloses a method for preparing a large size lead halide cesium perovskite crystal, wherein the crystal structure is CsPbX3, and X = Cl, Br or I. The large size lead halide cesium perovskite crystal is prepared by constant temperature evaporation without a protect gas in the whole process, equipment is simple, and the large size lead halide cesium perovskite crystal can be produced on a large scale. The prepared large-size lead halide cesium perovskite crystal has the advantages of high yield and good stability, and can be used in photoelectric research fields of solar cells, photodetectors, light emitting diodes, and the like.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA
Efficient perovskite quantum dot anion exchange method
InactiveCN109920864AGood environmental stabilityGood monodispersityFinal product manufactureSemiconductor devicesIonIon exchange
The invention discloses an efficient perovskite quantum dot anion exchange method. The method comprises the steps that (1) a CsPbBr<3> perovskite quantum dot stock solution is prepared; (2) the CsPbBr<3> perovskite quantum dot stock solution is purified to obtain a fluorescent transparent solution; and (3) halide and deionized water are mixed to prepare a halide aqueous solution, a surfactant is added dropwise to the upper layer of the halide aqueous solution to form an interface layer, then the fluorescent transparent solution obtained after purification in the step (2) is added to form layers, the solution stands under room temperature for a reaction, the upper-layer liquid is taken, and a perovskite quantum solution after anion exchange is obtained.
Owner:NANJING UNIV OF POSTS & TELECOMM
Pyrogenic pretreatment method for low-grade laterite nickel mine
InactiveCN101368235ASimple preprocessingStrong raw material adaptabilityWet separationBeneficiationLow graded
The invention relates to a fire pre-processing method for a low-grade lateritic nickel ore which belongs to the field of nonferrous metal. The method includes following steps : the low-tenor lateritic nickel ore mine is cracked; vulcanization pre-processing is carried out; a metal sulfide is generated; the ore concentrate and the tailing of the nickel purite can be obtained through carrying out one time roughing, four time choiceness and three time scavenging on the preprocessed lateritic nickel ore and returning the middling ores in sequence; under a magnetic field intensity of 6000 to 10000 oersted, one time open roughing and three time open choiceness are carried out on the flotation tailing; a magnetic product is iron ore concentrate; the rest products are combined into the total tailing. The technology of the invention has the characteristics of high material suitability, short flow, good vulcanization effect, device investment saving, low production cost, and the like, thus leading the subsequence beneficiation techniques to be greatly simplified and being capable of producing the mixed ore concentrate of nickel and cobalt, the iron ore concentrate and the tailing as well as obtaining a higher metal ore concentrate grade and a high recycling rate.
Owner:KUNMING METALLURGY INST
Electrochemical synthesis method of aryl sulfuric acid ester compound
InactiveCN108950592ADon't need protectionMild conditionsElectrolysis componentsElectrolytic organic productionSupporting electrolyteElectrolysis
The invention discloses an electrochemical synthesis method of an aryl sulfuric acid ester compound. Aryl sulfuric acid ester is subjected to green synthesis through constant-current electrolysis witharyl thiophenol and alcohol as raw materials in the existence of supporting electrolyte. The aryl sulfuric acid ester compound is synthesized through the electrochemical synthesis method without using a metal catalyst and an oxidizing agent, and the method has the characteristics of being high in atom economy, green, efficient, simple in process and the like and is suitable for industrial production.
Owner:HEFEI UNIV OF TECH
Synthesis method of 2-[(-4-chlorophenyl)(4-piperidinyl-oxy)methyl]pyridine having single optical isomer
InactiveCN104031029ADon't need protectionReduce generationOrganic chemistryChlorobenzeneCombinatorial chemistry
A preparation method of a compound of formula I is characterized in that the compound of formula I is obtained through one step direct condensation ether formation on a raw material of formula II and a raw material of formula III. The protection of reactive hydrogen on the nitrogen atom of the compound of the formula III is not needed in the invention, and a sulfonic acid compound is adopted as a reaction assistant, so the side reaction is reduced, reaction steps are simplified, and a satisfactory product yield can be realized. The compound of formula I having a single optical isomer can be obtained when the raw material of formula II having different isomers is selected.
![Synthesis method of 2-[(-4-chlorophenyl)(4-piperidinyl-oxy)methyl]pyridine having single optical isomer](https://images-eureka.patsnap.com/patent_img/b50fa5c1-760d-4f30-a249-27959511c3bd/BDA00002897357400011.PNG "Synthesis method of 2-[(-4-chlorophenyl)(4-piperidinyl-oxy)methyl]pyridine having single optical isomer")
![Synthesis method of 2-[(-4-chlorophenyl)(4-piperidinyl-oxy)methyl]pyridine having single optical isomer](https://images-eureka.patsnap.com/patent_img/b50fa5c1-760d-4f30-a249-27959511c3bd/BDA00002897357400012.PNG "Synthesis method of 2-[(-4-chlorophenyl)(4-piperidinyl-oxy)methyl]pyridine having single optical isomer")
![Synthesis method of 2-[(-4-chlorophenyl)(4-piperidinyl-oxy)methyl]pyridine having single optical isomer](https://images-eureka.patsnap.com/patent_img/b50fa5c1-760d-4f30-a249-27959511c3bd/BDA00002897357400021.PNG "Synthesis method of 2-[(-4-chlorophenyl)(4-piperidinyl-oxy)methyl]pyridine having single optical isomer")
Owner:CHONGQING HUAPONT PHARMA
Preparation method for Er<3+>-Yb<3+>-co-doped NaYF4 fluorescent powder
ActiveCN105112056ASimple preparation processDon't need protectionLuminescent compositionsAcetic acidAlcohol
Owner:FUZHOU UNIV
Method for preparing blue titanium dioxide
InactiveCN103553124ASimple methodShort cycleNanotechnologyTitanium dioxideSolventTitanium tetrachloride
The invention discloses a method for preparing blue titanium dioxide. The method is characterized in that cheap titanium trichloride is used as a raw material, balance conjugate pair titanium tetrachloride is added in a solvent thermal reaction system according to a certain molar ratio, sodium fluoride is used as a stabilizer, and blue titanium dioxide nanometer particles with high stability are synthesized by a one-step method. The method disclosed by the invention is simple, free of insert gas protection and short in period, the obtained product is good in crystallization growth, high in purity, free of agglomeration, high in yield and uniform in grain size, the product is granular, and the size of the product is 15-25 nanometers.
Owner:UNIV OF SCI & TECH OF CHINA
Preparation method of composite super absorbent resin
The invention relates to a preparation method of composite super absorbent resin. The method comprises the step: with water as a solvent, potassium persulfate as an initiator, and N,N-methylene bisacrylamide as a cross-linking agent, enabling monosaccharide molecules and clay to react with an acrylic acid monomer and an acrylamide monomer to obtain the composite super absorbent resin. According tothe super absorbent resin, the water absorption capability of the resin can be effectively improved and the problem that the rigidity of the resin is poorer after water absorption can be improved.
Owner:TIANJIN AGRICULTURE COLLEGE
Method for preparing diaromatic hydrocarbon from aromatic hydrazine
InactiveCN105175202AFacilitate the coupling reactionInhibition of self-coupling reactionsOrganic compound preparationOrganic chemistry methodsHydrazine compoundPalladium catalyst
The present invention discloses a method for preparing diaromatic hydrocarbon from aromatic hydrazine. The method comprises that: under effects of a bivalent palladium catalyst and camphor sulfonic acid, aryl siloxane and aromatic hydrazine are subjected to a coupling reaction, and after completing the reaction, post-treatment is performed to obtain the diaromatic hydrocarbon. According to the preparation method of the present invention, the specific additive camphor sulfonic acid is added to the reaction system, such that the coupling reaction of the aryl siloxane and the aromatic hydrazine is effectively promoted, the reaction conditions are mild, the self-coupling reaction of the aryl siloxane is inhibited, and the reaction yield is improved.
Owner:SHAOXING UNIVERSITY
Nano silver particles and preparation method and application thereof
InactiveCN110181071ASmall particle sizeNot easy to reuniteMaterial nanotechnologyTransportation and packagingPolyethylene glycolCrystal structure
The invention relates to the technical field of nano materials, and provides a preparation method of the nano silver particles. The method comprises the steps that S1, a silver ammonia solution and polyvinylpyrrolidone dispersion liquid are prepared, wherein the polyvinylpyrrolidone dispersion liquid is prepared in the manner that polyvinylpyrrolidone is dispersed in polyethylene glycol; and S2, the silver ammonia solution and the polyvinylpyrrolidone dispersion liquid are mixed, and stirring is carried out at the temperature ranging from 100 DEG C to 150 DEG C at the rotating speed being 400r / min to 900 r / min for 0.1 h to 6 h. Raw materials used in the preparation method are environment-friendly, the reaction conditions are mild, the equipment requirements are low, the yield is high, andindustrialization promotion is facilitated; and the nano silver particles prepared by the preparation method are small in particle size and high in uniformity, are not prone to agglomerating and arehigh purify. The further provided nano silver particles are of cubic crystal structures, the particle size is from 30 nm to 50 nm and is uniform in distribution, and the nano silver particles can be applied to the fields of electronic packaging and antibacterial fabrics.
Owner:SHENZHEN INST OF ADVANCED TECH
Synthesis method of polyaryls six-membered ring lactone compound
ActiveCN107805824AMild conditionsSimple and safe operationElectrolysis componentsElectrolytic organic productionChemistryLactone Compound
The invention discloses a synthesis method of a polyaryls six-membered ring lactone compound. 2-aryl benzoic acid is used as a raw material, C-O cyclizing is achieved through constant current electrolysis under existence of a supporting electrolyte, and the polyaryls six-membered ring lactone compound is obtained after separating and purifying. According to the synthesis method of the polyaryls six-membered ring lactone compound, the polyaryls six-membered ring lactone compound is synthetized by using an electrochemistry method, has the characteristics that the polyaryls six-membered ring lactone compound is high in atom economy, green and efficient, using of a metal catalyst and an oxidant is avoided, and the technology is simple, and the synthesis method of the polyaryls six-membered ring lactone compound is suitable for industrial production.
Owner:HEFEI UNIV OF TECH
Preparation method of symmetric 1,4-disubstituted-1,3-diacetylene
InactiveCN104710254AHigh yieldImprove practicalityOrganic compound preparationHydrocarbon by hydrocarbon condensationDiacetyleneRoom temperature
The invention discloses a preparation method of symmetric 1,4-disubstituted-1,3-diacetylene. Homocoupling of alkyne is carried out in a solvent in the presence of an alkali with silver as a catalyst to obtain the symmetric 1,4-disubstituted-1,3-diacetylene. The method has the advantages of simple operation, obtaining of corresponding diacetylene compounds at room temperature without air isolation or addition of a phosphine ligand or a precious metal, simple post-treatment, and very good practicality and economic values.
Owner:SHAOXING UNIVERSITY
Method for preparing diaryl sulfone
ActiveCN103641674AImprove practicalityHigh selectivitySulfonyl/sulfinyl group formation/introductionOrganic compound preparationArylAlcohol
The invention discloses a method for preparing diaryl sulfone and particularly relates to a copper chloride promoted method for preparing diaryl sulfone. The method is characterized by comprising the following step: taking aryl sulfinate as a raw material, carrying out a desulfurization coupling reaction on aryl sulfinate in an alcohol solvent under the action of copper chloride, so as to synthesize diaryl sulfone. According to the method, any ligand is not needed, inert gas shielding is not needed, and the diaryl sulfone of which the yield is 96 percent can be obtained.
Owner:ZHEJIANG ZHONGXIN FLUORIDE MATERIALS CO LTD
Preparation method of 5-hydroxymethylfurfural
The invention relates to the technical field of hydroxymethylfurfural preparation, particularly a preparation method of 5-hydroxymethylfurfural, which comprises the following steps: dissolving a saccharide raw material in a dimethylsulfoxide solvent, heating to 80-160 DEG C, adding chromium chloride to react, and detecting the reaction yield of the 5-hydroxymethylfurfural; and when the yield is greater than 90%, quenching the reaction, carrying out vacuum distillation to remove the solvent, diluting the residual liquid with a saturated sodium chloride water solution to obtain a solution to be extracted, extracting with an organic solvent, and drying by distillation to obtain the 5-hydroxymethylfurfural. The mass ratio of the saccharide raw material to the dimethylsulfoxide is 1:(1.5-20), and the addition amount of chromium chloride is 5-20 wt% of the saccharide raw material. The synthetic route is easy and simple to operate, and does not need any inert gas protective atmosphere; the total mass yield is up to higher than 90%, and the purity is up to higher than 96%; and the invention is suitable for industrial production, and enhances the solid content of the reaction to 33%, thereby greatly enhancing the reaction efficiency.
Owner:SHENGQUAN HEALTANG
Solution method for preparing high-efficiency CIS and CIGS thin-film solar cell
ActiveCN109817735ACheap and readily availableReduce manufacturing costFinal product manufacturePhotovoltaic energy generationIonSolvent
The invention discloses a solution method for preparing high-efficiency CIS and CIGS thin-film solar cell. Water and an alcohol solvent are taken as solvents for preparing a precursor solution; thiourea complexes or thiourea derivative complexes of copper, indium and gallium are synthesized; the synthesized complexes are used as raw materials or a combination of the synthesized copper complexes and metal chloride is used as a raw material and dissolved in water or an alcohol solvent to prepare a precursor solution, and the precursor solution is used for preparing the light absorption layer ofthe CIS and CIGS thin-film solar cell. The solvent used in the method is green, environment-friendly, cheap and easy to obtain, and the production cost can be greatly reduced. Metal ion hydrolysis andmetal oxide formation in the annealing process can be prevented, and meanwhile divalent copper defects in CIS and CIGS can be prevented from being formed. The copper-indium-sulfur and copper-indium-gallium-sulfur precursor films are prepared in an external atmospheric environment, and inert atmosphere protection is not needed.
Owner:NANJING UNIV OF POSTS & TELECOMM
Sensing head of omni-directional wind speed sensor
InactiveCN102213726AImprove perceptionAdaptableFluid speed measurement using thermal variablesBiochemical engineeringOmni directional
The invention relates to a sensing head of an omni-directional wind speed sensor. The sensing head is characterized by comprising a sensing head shell (1), a heating element support (2), a heating element (3), a heat conductor (4), a temperature sensor (5), a base and a cable (7); the heating element support (2) and the heating element (3) are arranged in the sensing head shell (1); the heating element (3) is arranged on the heating element support (2); the temperature sensor (5) is arranged on the heat conductor (4); a slot is arranged on the sensing head shell (1); an installation groove is arranged on the end surface of the sensing head shell (1) in the slot; the heat conductor (4) is arranged in the installation groove; the sensing head shell (1) is installed on the base (6); and the axial direction of the sensing head shell (1) and the bottom of the base (6) are provided with installation holes of the cable (7). The sensing head can be used for measuring omni-directional wind speed, improving environment tolerability of the sensor and prolonging the service life of the sensor.
Owner:CHINA NORTH VEHICLE RES INST
Preparation method of polypyrrole coated lithium titanium phosphate anode material
InactiveCN107658458ADon't need protectionImprove cycle stabilityCell electrodesSecondary cellsAir atmosphereWater baths
The invention discloses a preparation method of a polypyrrole coated lithium titanium phosphate anode material. The method includes: firstly adding ammonia water or a lithium hydroxide solution dropwise into an aqueous solution of polypyrrole, adjusting the solution pH value to obtain a solution A, mixing and dissolving a lithium source, a titanium source and a phosphorus source in a dispersant, then adding the mixture into the solution A, and conducting high speed stirring and dispersion to obtain a slurry B, performing stirring under a water bath condition to obtain gel, carrying out vacuumdrying and grinding crushing to obtain a precursor, and finally calcining the precursor in air atmosphere to obtain the polypyrrole coated lithium titanium phosphate anode material. According to the preparation method provided by the invention, the raw materials have low price, the prepared material has evenly coated surface, obviously improved conductivity, and good cyclic stability in an aqueouselectrolyte solution. Also because of the high conductivity characteristic of a macromolecular conductive polymer, the coated material has greatly improved conductivity and electrochemical performance. The preparation method is simple and practicable, the production process is green and environment-friendly, and is easy for industrial popularization.
Owner:HEFEI GUOXUAN HIGH TECH POWER ENERGY
Bifunctional ionic liquid, preparation method thereof and application of bifunctional ionic liquid in catalytic synthesis of bisphenol compounds
PendingCN113248441AEasy to useEasy to recycleThiol preparationOrganic compound preparationQuaternary ammonium cationPtru catalyst
The invention discloses a bifunctional ionic liquid, a preparation method thereof and application of the bifunctional ionic liquid in catalytic synthesis of bisphenol compounds, and belongs to the field of application of ionic liquid catalysts. The bifunctional ionic liquid is composed of heterocyclic quaternary ammonium cations containing sulfonic groups and sulfydryl and organic strong acid anions containing or not containing sulfydryl. The bifunctional ionic liquid has the functions of strong protonic acid and a -SH-containing compound, is used for catalytic synthesis of diphenolic acid, bisphenol A, bisphenol fluorene and the like, and has the characteristics of high reaction rate, high target product yield and good selectivity. The bifunctional ionic liquid is a green catalyst which is stable in performance and can be recycled, and compared with a protonic acid and sulfhydryl compound composite catalyst used in a traditional production process, the production process is simplified, equipment corrosion is reduced, and the production cost is reduced.
Owner:DALIAN UNIV OF TECH
Method for preparing blue titanium dioxide
InactiveCN103553124BHigh purityDon't need protectionNanotechnologyTitanium dioxideSolventSolvothermal reaction
Owner:UNIV OF SCI & TECH OF CHINA
Carboxylic ester preparation method
InactiveCN103772083BReduce pollutionSelectiveOrganic compound preparationCarboxylic acid esters preparationSalicylic acid esterCombinatorial chemistry
The invention provides a method which is based on activation of salicylate intramolecular hydrogen bonds to prepare carboxylic ester through nucleophilic substitution reaction between salicylate used as an alkylating reagent and carboxylic acid anions. The method has the characteristics that the reagent is available at low cost and the salicylic acid is recyclable, the carboxylic ester is generated selectively by using carboxylic acid containing hydroxyl or amino groups, the reagent is small in toxicity, and less environmental pollution is caused.
Owner:SICHUAN UNIV
Preparation method of microwave-radiated room-temperature phosphorescent material containing graphene oxide polymer
ActiveCN113444194ADon't need protectionEasy to prepareLuminescent compositionsMicrowave - actionFreeze-drying
The invention relates to a preparation method of a microwave-radiated room-temperature phosphorescent material containing a graphene oxide polymer. The method comprises the following steps: oxidizing graphite through an improved Hummers method to obtain graphene oxide, dissolving acrylamide in water, adding a graphene oxide aqueous solution and ammonium persulfate according to a mass ratio of acrylamide to graphene oxide to ammonium persulfate to water of 100:(0.0001-0.002):(0.5-1.5):(500-2000), uniformly conducting mixing, carrying out a reflux reaction under the action of microwaves for 3-10 minutes, conducting cooling to room temperature, precipitating the obtained product with methanol, carrying out suction filtration, washing a filter cake with methanol, and conducting freeze-drying to obtain the graphene oxide-containing super-long-life polymer room-temperature phosphorescent material. The prepared polymer phosphorescent material is long in phosphorescent life at room temperature, the luminescent afterglow reaches 16s, meanwhile, the preparation method is simple and convenient, and the product is non-toxic, pollution-free, heavy metal-free, halogen-free, good in water solubility and wide in application prospect.
Owner:FUJIAN NORMAL UNIV
A kind of preparation method of chlorohydroxyapatite whisker
InactiveCN103641097BDon't need protectionSimple processPhosphorus compoundsProsthesisSource materialReaction temperature
The invention relates to a preparation method of a chlorohydroxyapatite whisker, and belongs to the fields of chemistry and materials. The method comprises the steps: with calcium carbonate and calcium hydrophosphate as calcium and phosphorus source materials and an alkali metal chloride as a fused salt, obtaining the chlorohydroxyapatite whisker material by controlling the composition of the fused salt, the ratio of the fused salt to the calcium and phosphorus mixed material, and the reaction temperature. The diameter of the obtained chlorohydroxyapatite whisker ranges from 0.5 microns to 40 microns, and the length of the chlorohydroxyapatite whisker ranges from 5 microns to 300 microns; the chlorohydroxyapatite whisker is mainly used for reinforcing and toughening ceramics and high molecular biological materials; therefore, the chlorohydroxyapatite whisker has the value of wide application.
Owner:QILU UNIV OF TECH
A perovskite cspbbr 3 Quantum dots and their preparation methods and applications
ActiveCN110078116BWon't breakEasy to operateLuminescent compositionsLead compoundsPtru catalystPerovskite (structure)
The invention discloses a perovskite CsPbBr 3 The method for preparing quantum dots is characterized in that it includes the following features: S1. Prepare a compound containing CsBr, PbBr 2 , a mixed solution of dimethylformamide, oleic acid and oleylamine; S2. In the mixed solution of step S1., add silicon sphere particles, and then stir and react at 30-60°C for at least 1h to obtain the perovskite CsPbBr 3 quantum dots. The preparation method provided by the present invention only needs to add a solid catalyst silicon sphere particle in the preparation process, which can quickly precipitate the perovskite CsPbBr 3 Quantum dots have simple operation steps, short reaction time, mild conditions, no need for protective gas, high repetition rate, and large-scale production; moreover, the product is stable, the original structure of perovskite will not be destroyed, and the obtained product can still Maintain the original high-efficiency fluorescence characteristics.
Owner:GUANGDONG UNIV OF TECH
Method for preparing esomeprazole magnesium
InactiveCN105153117AThe synthesis process is simpleOptimize synthesis conditionsOrganic chemistryOrganic solventMicrowave
The invention provides a method for preparing esomeprazole magnesium. The method comprises the following steps: enabling esomeprazole and magnesium powder to react in absolute methanol under the synergistic effect of ultrasonic microwaves, filtering the obtained salt forming reaction liquid, performing vacuum concentration, adding an organic solvent for washing, further washing with water, and drying, thereby obtaining an esomeprazole magnesium product. When esomeprazole magnesium is prepared by using the method, a strict anhydrous condition is not needed in salt forming reaction, the production period is greatly shortened, the operation is simple, the salt forming reaction is complete, and the yield can be 87-95%; and more importantly, the methanol and organic solvent used in the reaction process can be recycled and applied mechanically, so that the production cost is lowered, and relatively high environmental-friendly values can be achieved. In addition, the esomeprazole magnesium product prepared by using the method provided by the invention is relatively high in purity, and the quality can be relatively easy to control.
Owner:INST OF PHARMACY SHANDONG PROV ACAD OF MEDICAL SCI
Process for preparing biaryls from aromatic hydrazines
InactiveCN105175202BHigh yieldImprove practicalityOrganic compound preparationOrganic chemistry methodsHydrazine compoundPalladium catalyst
The invention discloses a method for preparing biaryl hydrocarbons from aromatic hydrazine, which comprises the following steps: under the action of divalent palladium catalyst and camphorsulfonic acid, aryl silicon ether and aromatic hydrazine undergo a coupling reaction, after the reaction is complete, after Processing yields the biaryls. The preparation method effectively promotes the coupling reaction of aryl silicon ether and aromatic hydrazine by adding a specific additive camphorsulfonic acid in the reaction system, the reaction conditions are milder, the self-coupling reaction of aromatic silicon ether is suppressed, and the The yield of the reaction.
Owner:SHAOXING UNIVERSITY
A kind of synthetic method of biaryl six-membered ring lactone compound
ActiveCN107805824BDon't need protectionMild conditionsElectrolysis componentsElectrolytic organic productionSupporting electrolyteBenzoic acid
The invention discloses a synthesis method of a biaryl six-membered ring lactone compound, which uses 2-arylbenzoic acid as a raw material, realizes C-O cyclization by constant current electrolysis in the presence of a supporting electrolyte, and separates and purifies the compound. After that, the biaryl six-membered ring lactone compound is obtained. The synthesis by the electrochemical method of the present invention has the characteristics of high atom economy, green and high efficiency, avoiding the use of metal catalysts and oxidants, simple process and the like, and is suitable for industrial production.
Owner:HEFEI UNIV OF TECH
Carboxylic ester preparation method
InactiveCN103772083AReduce pollutionSelectiveOrganic compound preparationCarboxylic acid esters preparationSalicylic acid esterCombinatorial chemistry
The invention provides a method which is based on activation of salicylate intramolecular hydrogen bonds to prepare carboxylic ester through nucleophilic substitution reaction between salicylate used as an alkylating reagent and carboxylic acid anions. The method has the characteristics that the reagent is available at low cost and the salicylic acid is recyclable, the carboxylic ester is generated selectively by using carboxylic acid containing hydroxyl or amino groups, the reagent is small in toxicity, and less environmental pollution is caused.
Owner:SICHUAN UNIV
A preparation liyo 2 battery material method
ActiveCN104953116BDon't need protectionLess investmentCell electrodesSecondary cellsAlcoholRoom temperature
The invention discloses a method for preparing a LiYO2 battery material. The method comprises the following steps: mixing a lithium source and a yttrium source in a solvent prepared by mixing double-distilled water and ethyl alcohol according to a certain mole ratio so as to obtain a mixture; stoving the mixture in a stove so as to obtain a product; performing high-temperature calcination on the obtained product within a certain temperature range; and cooling to the room temperature; and grinding so as to obtain the LiYO2 powder battery material. The method is easy and feasible, no gas polluting the environment is generated, and the prepared LiYO2 material has the certain charging and discharging function and the stable cycle performance, is a lithium ion battery material having the wide application prospect, and has the potential business value.
Owner:河北零点新能源科技有限公司
Perovskite solar cell with pyridyl BODIPY passivation layer
ActiveCN114014882AThe synthetic route is simpleHigh yieldSolid-state devicesSemiconductor/solid-state device manufacturingPerovskite (structure)BODIPY
The invention discloses a pyridine-based BODIPY-like passivation material, a preparation method thereof and an application of the material in a perovskite solar cell, and belongs to the field of photoelectric functional materials and devices. According to the invention, 2, 2-dipyridyl is used as a raw material to synthesize a BODIPY-like structure, and the BODIPY-like structure is loaded on the surface of perovskite to serve as a passivation layer of the perovskite solar cell. The synthesis route of the passivation material is simple, the conditions are mild, the solvent does not participate in the reaction, the yield is high, inert gas protection is not needed, and molecules with F as anions can be obtained; the unique structure can passivate inherent defects on the surface of the perovskite, inhibit non-radiative recombination, promote interface charge transmission, improve the light utilization rate and protect the perovskite from being eroded by water and solvents, so that the efficiency (photoelectric conversion efficiency reaches up to 20.7821%) and stability of the perovskite solar cell are improved.
Owner:FUJIAN NORMAL UNIV
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