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Sandwiched porphyrin-phthalocyanine mixed double-layer metal complex nanotube and preparation method and application thereof
InactiveCN106317091ASimple manufacturing methodThe experimental process is controllableGroup 3/13 organic compounds without C-metal linkagesMaterial resistancePorphyrinPhthalocyanine
The invention relates to a sandwiched porphyrin-phthalocyanine mixed double-layer metal complex (Eu(TpyP)(Pc)) nanotube and a preparation method and application thereof, and belongs to the technical field of organic semiconductor material chemistry. The Eu(TpyP)(Pc) nanotube is prepared for the first time; the method comprises the steps that 1, Eu(TpyP)(Pc) is dissolved by a specific solvent to form a solution with the concentration being 0.001-0.005 mmol / mL; 2, AAO is soaked into the solution prepared in the step 1, and placed for 8-12 h in a sealed mode; then, the solution is removed, and vacuum drying is performed; 3, a sodium hydroxide water solution with the concentration being 6 mol / L is used for dissolving the AAO in the Eu(TpyP)(Pc) nanotube containing the AAO prepared in the step 2. The preparation method is simple and effective, the experimental process is easy to control and can be executed under the room temperature. The Eu(TpyP)(Pc) nanotube is purified and orderly, toxic gas nitrogen dioxide can be detected under the room temperature, the toxic gas NO2 response concentration is low, the NO2 gas sensitive detection limit under the room temperature is low, response time and recovery time are short, and interference of CO and ammonia gas can be resisted.
Owner:UNIV OF JINAN
Method for preparing cobalt-doped zinc oxide nanorods through sol-gel
ActiveCN105314672ASimple processLow reaction temperatureMaterial nanotechnologyZinc oxides/hydroxidesAir atmosphereZinc Acetate Dihydrate
The invention discloses a method for preparing cobalt-doped zinc oxide nanorods through sol-gel. The method comprises the steps of dissolving dihydrate zinc acetate and tetrahydrate cobaltous acetate into ethylene glycol monomethyl ether according to the stoichiometric ratio of Zn<1-x>Co<x>O, stirring the mixture uniformly, and obtaining a mixed solution; dropwise adding ethanolamine to the mixed solution, conducting a reaction under the condition that the mixture is stirred at the temperature of 60-80 DEG C, cooling the mixture naturally to the room temperature after the reaction is ended, and obtaining clear cobalt-doped zinc oxide precursor sol; drying the clear cobalt-doped zinc oxide precursor sol, obtaining dried gel, then making the dried gel be subjected to a heat treatment process in the air atmosphere, and obtaining the clear cobalt-doped zinc oxide nanorods. According to the method, the cobalt-doped zinc oxide nanorods are prepared through a multicomponent uniform reaction sol-gel method, and the method has the advantages that the process is simple, the reaction temperature is low, the cost is low, the test process is easy to control, the product crystallinity degree is high, and the crystalline phase is pure, and the obtained clear cobalt-doped zinc oxide nanorods have ferromagnetism at the room temperature.
Owner:XIAN TECHNOLOGICAL UNIV
Method for preparing multi-morphology nano zinc oxide by solid-phase method
InactiveCN111675238AIncrease productionSimple process conditionsMaterial nanotechnologyZinc oxides/hydroxidesSulfate zincPhysical chemistry
The invention discloses a method for preparing multi-morphology nano zinc oxide by a solid phase method. The method comprises the following steps: (1) weighing zinc sulfate heptahydrate and ammonium bicarbonate into a ceramic mortar; (2) manually grinding the solid mixture; (3) after the reaction is finished, transferring the mixture in the ceramic mortar into a 50 mL centrifuge tube, adding 10 mL-30 mL of deionized water, stirring the turbid liquid for 3 min-5 min by using a glass rod, centrifuging the turbid liquid, filtering, continuously adding deionized water, and repeating the steps of washing and centrifuging for 3-5 times; (4) drying the centrifuged solid; (5) putting a precursor into a muffle furnace, and calcining; and (6) filling the calcined powder into a sample bag. The solid-phase method in the preparation method of zinc oxide is simple in process condition, low in cost, low in requirement on equipment, green and environment-friendly, high in zinc oxide yield, continuousand adjustable in operation procedure and easy to control the experimental process, so that industrial production is easy.
Owner:淮南前景新材料有限公司
Preparation method of UC fuel pellet
InactiveCN109903868AThe experimental process is controllableHigh purityNuclear energy generationReactors manufactureUranium oreMaterials science
The invention belongs to the technical field of nuclear fuel preparation, and relates to a preparation method of a UC fuel pellet. The preparation method comprises following steps: (1) preparing ultrafine uranium powder; (2) mixing uranium powder and ultrafine carbon powder; (3) synthesizing UC powder at a high temperature; (4) pressing UC powder; and (5) sintering a UC fuel pellet blank. The provided preparation method can prepare a high purity UC fuel.
Owner:CHINA INSTITUTE OF ATOMIC ENERGY
Nanometer cerium oxide and preparation method thereof
ActiveCN110194480AIncrease productionThe operating program is continuously adjustableMaterial nanotechnologyRare earth metal compoundsOxalateAlcohol
The invention discloses nanometer cerium oxide, and a preparation method thereof. The preparation method comprises following steps: a cerium salt, and a carbonate or an oxalate are mixed at a molar ratio of 1: (1-3), an alcohol dispersant is added for full grinding reaction, after reaction, washing and drying are carried out to prepare a precursor, and the precursor is subjected to calcining. According to the preparation method, the cerium salt, and the carbonate or the oxalate are taken as raw materials, the alcohol dispersant is added, at alcohol environment, solid phase chemical reaction iscarried out, grinding is adopted to prepare the precursor, and calcining is adopted to prepare the cerium oxide powder. The cerium oxide powder prepared using the preparation method is small in particle size, and high in purity and dispersibility; the technology is simple; operation is convenient; cost is low; equipment requirement is low; the preparation method is green, and is friendly to the environment; cerium oxide yield is large; operation processes are continuous and adjustable; experiment process is easy to control; and industrialized production can be realized conveniently.
Owner:YICHANG SANXIA ZHONGRUN NANO MATERIAL
Top-opened experiment simulating device for fire within limited space
The invention discloses a top opened simulating device for fire within a limited space. An arranging chamber is of a detachable structure supported by a chamber supporting frame and is divided into alower-layer chamber and an upper-layer chamber; the lower-layer chamber is of a closed cavity; the upper-layer chamber is of a top opened cavity; the upper-layer chamber is arranged into a transparentglass side wall; one side of the chamber is arranged into an openable chamber door; a fuel disk is arranged at the bottom center of the upper-layer chamber; a smoke exhausting system is arranged above the chamber; a camera is arranged outside the chamber for recording the flowing process of flue gas. According to the top opened experiment simulating device disclosed by the invention, pool fire isdirectly adopted as a fire source, and the pressure generated by gas at the top opening in a real fire environment can be simulated; by means of a flue gas flow field display unit, the flowing stateand the flowing form of the flue gas at the top opening can be completely simulated, and the whole experiment process and the phenomenon can be clearly monitored through the glass side wall; the fueldisk and a balance are respectively arranged in the upper-layer chamber and the lower-layer chamber of the experiment device, and measurement data are accurate and reliable.
Owner:UNIV OF SCI & TECH OF CHINA
Ampoule for testing temperature field of hearth
InactiveCN104458041AEasy to makeEasy to replaceThermometers using electric/magnetic elementsUsing electrical meansTube furnaceHearth
The invention provides an ampoule for testing the temperature field of a hearth. The ampoule comprises an outer shell and a thermocouple set which is fixed in the outer shell and used for measuring temperature. The thermocouple set comprises a positioning thermocouple fixed in the ampoule and a plurality of temperature measurement thermocouples surrounding the positioning thermocouple, wherein measurement heads of the temperature measurement thermocouples are spaced by a certain distance in the axial direction. The ampoule can be used for obtaining temperature distribution inside the hearth in real time and in situ, and does not affect the furnace body structure of a tube furnace.
Owner:SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
Composite microcapsule adsorbent for removing Cs < + > in water and preparation method thereof
PendingCN111686703ASolve the problem of easy aggregation and difficult dispersionEasy to handleOther chemical processesAlkali metal oxides/hydroxidesSorbentIron chloride
The invention provides a composite microcapsule adsorbent for removing Cs < + > in water and a preparation method thereof. Radioactive elements in the water are effectively removed, and the compositemicrocapsule adsorbent is applied to a treatment process of radioactive sewage. The specific method comprises the following steps: modifying microcapsules with polylactic acid, and reacting with nanoPrussian blue obtained by reaction of ferric chloride and potassium ferrocyanide to prepare the Prussian blue-polylactic acid composite microcapsule adsorbent. After adsorbing Cs < + > in water, the microcapsule adsorbent rises and floats on the surface of a water body for separation so that the purpose of removing Cs < + > in water is achieved. Meanwhile, the selected carrier polylactic acid hasthe comprehensive properties of no toxicity, no harm, degradability, environmental friendliness, no secondary pollution and the like, and the problems that Prussian blue is easy to gather and difficult to separate are also solved. The method is simple in process, and particularly can adsorb low-concentration Cs < + > so that the method can be widely used for treating sewage containing Cs < + >, improving the living environment of human beings and improving the living quality.
Owner:CHANGZHOU UNIV
Cadmium telluride nanowire and preparation method thereof
ActiveCN102951619AGood lookingSimple production processNanotechnologyBinary selenium/tellurium compoundsNanowireRoom temperature
The invention provides a preparation method of a cadmium telluride nanowire, which comprises the following steps: S1. substrate processing: washing and drying zeolite, plating a metal film on the zeolite surface, and storing the treated zeolite in a drying box; S2. horizontally putting a quartz tube in a high-temperature pipe furnace, putting pure cadmium telluride powder at an air flow upwind port, and putting the treated zeolite at an air flow downwind port; S3. vacuumizing the high-temperature pipe furnace, and introducing inert gas to perform gas washing; S4. continuing introducing the inert gas, and heating the cadmium telluride powder and zeolite; and S5. continuing introducing the inert gas, and cooling the cadmium telluride powder and zeolite to room temperature together so that the generated cadmium telluride nanowire is attached to the zeolite surface. The method provided by the invention has the advantages of strong operability, low requirements for experimental equipment, and controllable experimentation process; and the cadmium telluride nanowire prepared by the method has the advantages of smooth surface and favorable shape, thereby having favorable application prospects.
Owner:KUANG CHI INST OF ADVANCED TECH +1
Lower floating body strength experiment method
ActiveCN112665887AReduce pollutionEliminate pollutionStructural/machines measurementWind energy generationMarine engineeringSewage
The invention relates to a lower floating body strength experiment method. A lower floating body comprises a ballast tank and empty tanks. The two empty tanks are located on the two sides of the ballast tank. The method is characterized in that a specific strength test method comprises the following steps: S1, injecting water; S2, installing an experiment pipe; S3, performing exhausting; S4, performing pressurizing; S5, performing observation; S6, maintaining the pressure; and S7, ending the experiment. The process is safe and reliable, operation is easy and convenient, efficiency is high, environmental pollution can be greatly reduced, and the experiment process is controllable; the experiment is initiated in the industry that the strength test of the lower floating body is completed within 3-4 days from the beginning of water injection, the test can effectively reduce various operation risks in the test process, and pollution of sewage to a cabin is avoided; and through simple transformation of infrastructures, subsequent ships can more effectively utilize the test method of the ship, the test time and the labor cost are saved, and great reference significance is achieved for similar ships with diving requirements.
Owner:SHANGHAI ZHENHUA HEAVY IND QIDONG MARINE ENG
Method for preparing nano-calcium carbonate powder through high-energy ball milling
ActiveCN107032380ASimple process conditionsEasy to manufactureCalcium/strontium/barium carbonatesNanotechnologyHigh energyRoom temperature
The invention provides a method for preparing nano-calcium carbonate powder through high-energy ball milling. The method includes the first step of adding raw materials, the second step of carrying out ball milling on the raw materials, and the third step of removing calcium chloride and sodium carbonate. According to the high-energy ball milling preparing method, technological conditions are simple, equipment manufacturing is convenient, the cost is low, and the yield is high; preparation is generally carried out at the room temperature, operation procedures are continuously adjustable, the experiment process is easy to control, and thus industrialized production can be easily achieved; by means of the method, amorphous nano-CaCO3 and crystalline nano-CaCO3 can be prepared by adjusting experiment parameters.
Owner:HUBEI UNIV OF TECH
Carbon-coated and Na <+>-doped LiMnPO4 positive electrode material as well as preparation method and application thereof
InactiveCN111162251AUniform particle size distributionRaise the ratioSecondary cellsPositive electrodesCarbon coatingPhysical chemistry
The invention relates to a carbon-coated and Na <+>-doped LiMnPO4 positive electrode material as well as a preparation method and application of the carbon-coated and Na <+>-doped LiMnPO4 positive electrode material. The preparation method comprises the following steps of carrying out ball milling on Li2CO3, MnCO3, NH4H2PO4 and sodium polyacrylate, and preparing the sodium-doped LiMnPO4 (at) C material by adopting a high-temperature reduction method, wherein the purposes of coating carbon and doping metal Na < + > can be achieved at the same time by utilizing the sodium polyacrylate. Polypropylene is used as a carbon source, and LiMnPO4 / C prepared through high-temperature solid-phase reduction is used as a contrast material. The sodium-doped LiMnPO4 (at) C material has a better olivine structure, a good crystal form and uniform particle size distribution, and the electrochemical properties of the sodium-doped LiMnPO4 (at) C material at all aspects are greatly improved compared with those of LiMnPO4 / C which is not doped with sodium. The first specific discharge capacity of the sodium-doped LiMnPO4 (at) C material at 0.1 C is as high as 152mAh g <-1 >, and the cycle performance is good. The method is a novel and practical method for preparing the lithium ion battery positive electrode material sodium-doped LiMnPO4 (at) C through carbon coating and Na < + > doping in one step.
Owner:DALIAN JIAOTONG UNIVERSITY
Method for preparing titanium dioxide powder with different morphologies by solid phase method
ActiveCN112357955AIncrease productionSimple process conditionsNanotechnologyTitanium dioxideActive agentSurface-active agents
The invention discloses a method for preparing titanium dioxide powder with different morphologies by a solid-phase method. The method comprises the following steps: S1, weighing titanyl sulfate solidand sodium carbonate solid in a ceramic mortar, S2, adding different surfactants in the ceramic mortar, S3, adding a small amount of water into the solid mixture, and continuing grinding, S4, transferring the mixture into a centrifuge tube, centrifugally separating on a centrifugal machine, pouring out supernatant after centrifugal separation is finished, adding water, stirring for 2-5 minutes byusing a glass rod, centrifuging again, and repeating centrifugation for five times; S5 putting the washed solid into a drying oven with the temperature of 110 DEG C and drying for 1 hour; S6 puttingthe dried powder into a muffle furnace and calcining; and S7 putting the calcined sample into the sample bag. The solid-phase synthesis method of the titanium dioxide powder is simple in process condition, low in cost, low in requirement on equipment, green, environmentally friendly, small in particle size of titanium dioxide, high in yield, continuous and adjustable in operation procedure and easy for industrial production.
Owner:ANHUI JINGCHENG NEW MATERIAL CO LTD
Flexible capacitive sensor and preparation method and application thereof
InactiveCN112890789AImprove the ability to withstand large deformationIncrease initial capacitanceEvaluation of blood vesselsSensorsElectromagnetic interferenceDielectric layer
The invention relates to the field of flexible sensors, in particular to a flexible capacitive sensor and a preparation method and application thereof. The flexible capacitive sensor comprises a dielectric layer and a flexible electrode, the flexible electrode is arranged on the surface of the dielectric layer, and the dielectric layer comprises a flexible dielectric elastomer substrate and inorganic high-dielectric particles. The flexible capacitive sensor has good stretchability and good dielectric response performance at the same time, the sensor is endowed with a high-baseline initial capacitance value by adding the inorganic high-dielectric particles, the capacity of the sensor for resisting pF-level electromagnetic interference in the external environment is improved, and the sensing range and the application field of the sensor are widened.
Owner:BEIJING UNIV OF POSTS & TELECOMM +2
A kind of nano cerium oxide and preparation method thereof
ActiveCN110194480BIncrease productionThe operating program is continuously adjustableMaterial nanotechnologyCerium oxides/hydroxidesAlcoholChemical reaction
The invention discloses a nano-cerium oxide and a preparation method thereof. The preparation method of the nano-cerium oxide comprises mixing a cerium salt and a carbonate or an oxalate according to a molar ratio of 1: (1-3), and then adding alcohols The dispersant is fully ground and reacted, washed and dried after the reaction to obtain a precursor; and then the precursor is calcined. It uses cerium salt and carbonate or oxalate as raw materials, and adds alcohol dispersant, adopts solid-phase chemical reaction in alcohol environment to prepare precursor by grinding, and then prepares cerium oxide powder by calcination. The cerium oxide powder prepared by the above method has small particle size, high purity, and good dispersibility; the whole process is simple, easy to operate, low in cost, low in equipment requirements, green and environmentally friendly, and the output of cerium oxide is large, and the operation procedure is continuous Adjustable, easy to control the experimental process, easy to industrial production.
Owner:YICHANG SANXIA ZHONGRUN NANO MATERIAL
Electricity-heat-gas multi-stress combined aging experiment platform and experiment method for insulating material
InactiveCN113092962AFeatures miniaturizationEasy to operateTesting dielectric strengthWeather/light/corrosion resistanceTemperature controlSmall footprint
The invention discloses an electric-thermal-gas multi-stress combined aging experiment platform and an experiment method for an insulating material. The platform comprises a plurality of experiment cavities, wherein tops of the experiment cavities are connected with sealing covers, and the sealing covers are connected with heating rings and temperature sensor probes which are inserted into the experiment cavities; the heating ring and the temperature sensor probe are jointly connected to a temperature controller, an insulating plate is arranged on the inner side of the bottom of the experiment cavity, two high-voltage electrodes are symmetrically arranged on a cavity wall of the experiment cavity, one high-voltage electrode is connected to a high-voltage end of an aging voltage source, and the other high-voltage electrode is grounded; a plurality of experiment cavities are connected in parallel to an aging voltage source, and the insulating plate is used for placing a group of discharge electrodes for applying voltage to the insulating material. The experimental platform is reasonable in structural design, small in occupied area, convenient to operate and capable of achieving long-term heating and pressurizing experiments in different atmospheres.
Owner:XI AN JIAOTONG UNIV +1
Multi-functional animal craniocerebral injury instrument
InactiveCN109820614AReduce animal deathsThe experiment process is intuitiveAnimal fetteringSurgical veterinaryDrive motorMotor shaft
The invention discloses a multi-functional animal craniocerebral injury instrument. The instrument comprises a base, brackets are arranged on the two sides of the middle of the base, and columns are symmetrically arranged on the two sides of the front end of the base; sliding grooves are formed in the inner sides of the columns, the upper and lower ends of the bottom of each sliding groove of thecolumns are movably connected with two driving gears through connecting shafts, and chains are arranged on the outer sides of the two driving gears; driving motors are fixedly connected with the outersides of the columns, and motor shafts of the driving motors are in power connection with the driving gears at the upper ends; rotary frames capable of rotating are arranged in the centers of the tops of the brackets. The multi-functional animal craniocerebral injury instrument can accurately and continuously control the impact speed and acquire parameters of actual impact depth, remaining time and the like and cannot conduct impacting of the large weight difference. A contusion injury model can be accurately and repeatedly made, animal death is reduced, and the experiment process is more visible and more controllable; an animal head height measuring device is arranged to conveniently adjust the height of the craniocerebral injury instrument, and the experiment accuracy is improved.
Owner:AFFILIATED HUSN HOSPITAL OF FUDAN UNIV +1
Galvanic corrosion simulation test device and method for composite steel bar coating and core material
ActiveCN111141671AReal-time measurementReduce use costWeighing by removing componentWeather/light/corrosion resistanceControl systemGalvanometer
The invention relates to a galvanic corrosion simulation test device and method for a composite steel bar coating and a core material. The device comprises a box body, a swing clamp A, a swing clamp B, a zero-resistance galvanometer, a temperature measuring electrode, a heater and a control system, wherein a core material sample and a composite steel bar sample are respectively fixed on the swingclamp A and the swing clamp B, and the top ends are connected with the zero-resistance galvanometer through wires; a corrosive solution is contained in the box body, and the core material sample and the composite steel bar sample can swing between a horizontal state and a vertical state; the core material sample and the composite steel bar sample are not in contact with the corrosive solution whenin a horizontal state; when the composite steel bar sample is in a vertical state, the coating material exposed out of the middle of the composite steel bar sample is completely immersed in the corrosive solution. The phenomenon of galvanic corrosion between the core material and the coating after the coating material of the composite steel bar sample is subjected to pitting corrosion can be simulated, the coupling potential and the coupling current can be measured in real time, and the corrosion rate of the core material and the pitting corrosion depth of the core material can be comprehensively evaluated.
Owner:ANGANG STEEL CO LTD
Preparation method of stable isotope-labeled clorprenaline
PendingCN113149851ANo abundance dilutionHigh purityOrganic compound preparationCarboxylic acid amides preparationChemical reactionIsotopic labeling
The invention relates to a preparation method of stable isotope-labeled clorprenaline. The preparation method comprises the following steps: with 2-bromo-2'-chloroacetophenone as an initial raw material, successively conducting improved Gabriel synthesis (wherein the initial raw material and an amination reagent sodium, namely diformyl amide are subjected to a nucleophilic substitution reaction), hydrolysis, reduction and reductive amination so as to synthesize the isotope-labeled clorprenaline . According to the preparation method disclosed by the invention, through a four-step conventional chemical reaction, process design is reasonable, raw material price is low, an experimental process is controllable, operation is simple and convenient, various required labeled compounds such as D-labeled, 13C-labeled or D / 13C double-labeled compounds can be conveniently synthesized, the purity of the prepared target product is high and reaches 98% or above, total yield reaches 66% or above, the isotope abundance of the final product can reach 98% or above, the phenomenon of isotope abundance dilution is avoided, higher reproducibility and stability are achieved, and the obtained target compound can provide a standard reagent for accurately and quantitatively detecting trace residues of clorprenaline.
Owner:阿尔塔(天津)标准物质研究院有限公司 +1
ga 2 o 3 Fabrication method of thin film transistor
ActiveCN107946176BImprove uniformityImprove responseTransistorSemiconductor/solid-state device manufacturingUltraviolet detectorsReaction temperature
The invention discloses a preparation method of a Ga2O3 thin film transistor which is mainly used for solving the problems of uneven property of thin films grown via conventional technologies, low utilization rate of raw material, high reaction temperature and production processes being complex and difficult to control in conventional technologies. An implementation plan for the preparation methodcomprises the following steps: 1. a precursor Ga (NO3) 3 aqueous solution is prepared; 2. a silicon oxide wafer is cleaned and surface decontamination is performed; 3. the precursor Ga(NO3)3 aqueoussolution is spin-coated on the cleaned silicon oxide wafer; 4. a silicon wafer sample spin-coated with the precursor Ga(NO3)3 solution is annealed to form a Ga2O3 film.5. a metal electrode is made onthe annealed Ga2O3 film to complete manufacturing operation of a Ga2O3 thin film transistor. The preparation method disclosed in the invention is simple and easy to implement, only a low synthesis temperature is needed to obtain molecular level uniformity in a short time, and electrical tests show that the transistor made via the preparation method disclosed in the present invention is good in electrical properties and can be used in deep ultraviolet detectors.
Owner:XIDIAN UNIV
Preparation method of ractopamine-D6 hydrochloride
PendingCN113061094AAdvantages of preparation methodNo abundance dilutionOrganic compound preparationCarbonyl compound preparationChemical reactionChemical compound
The invention provides a preparation method of ractopamine-D6 hydrochloride. a compound I is used as an initial raw material, and isotope-labeled ractopamine-D6 hydrochloride is synthesized through H-D exchange, reductive amination, deprotection and salt forming reaction. According to the preparation method, the target product is obtained through 2-3 steps of conventional chemical reactions, the purity of the prepared target product reaches 98% or above, the total yield reaches about 44%, the isotope abundance is controllable and reaches 96% or above, the process design is reasonable, the raw material price is low, the experimental process is controllable, operation is easy and convenient, and the process reproducibility is high.
Owner:阿尔塔(天津)标准物质研究院有限公司 +1
A method for preparing titanium dioxide powders with different morphologies by solid-phase method
ActiveCN112357955BIncrease productionSimple process conditionsNanotechnologyTitanium dioxideActive agentSurface-active agents
The invention discloses a method for preparing titanium dioxide powders with different shapes by a solid-phase method. The method includes the following steps: S1: weighing solid titanium oxysulfate and solid sodium carbonate in a ceramic mortar, S2: adding different surface active substances in a ceramic mortar, S3: Add a small amount of water to the solid mixture, continue grinding, S4: Transfer the mixture to a centrifuge tube, centrifuge on a centrifuge, pour off the supernatant after the end, add water, use a glass Rod stirring for 2min-5min, centrifuging again, and repeating the centrifugation five times, S5: place the washed solid in an oven at 110 ° C for drying for 1h, S6: put the dried powder into a muffle furnace for calcination, S7: calcine After the sample is loaded into the sample bag. The solid-phase synthesis method of titanium dioxide powder of the invention has simple process conditions, low cost, low requirements for equipment, green environmental protection, small particle size of titanium dioxide, large output, continuously adjustable operation procedure, and easy industrial production.
Owner:ANHUI JINGCHENG NEW MATERIAL CO LTD
A composite fiber membrane for purifying CS in water and preparation method thereof
ActiveCN112138549BLarge specific surface areaHigh porositySemi-permeable membranesMembranesFiberSpinning
The invention provides a composite fiber membrane for purifying Cs in water and a preparation method thereof. The composite fiber membrane can effectively purify radioactive Cs in water, and is widely used in the research of radioactive isotopes and in the treatment process of wastewater discharged from hospitals and factories. The specific method is: firstly, SiO is prepared by electrospinning technology 2 Nanofibrous membranes, modified with 3-aminopropyltriethoxysilane, with K 4 Fe(CN) 6 and FeCl 3 The nano-Prussian blue was grown on the surface of the nanofiber membrane by reacting under hydrothermal conditions, namely, a nano-Prussian blue composite fiber membrane was constructed. The composite fiber membrane uses silica as a carrier, which can selectively adsorb Cs elements and realize efficient purification of radioactive Cs elements. Compared with traditional industrial Cs separation methods, the composite fiber membrane has the advantages of low energy consumption, high separation efficiency, and one-step curing. Separation, no secondary pollution, effectively avoid the shortcomings of redundant separation operations and large amount of radioactive waste in traditional methods.
Owner:CHANGZHOU UNIV
Dimethyl fumarate preparation method
InactiveCN106316841AAvoid harmFast crystallizationOrganic compound preparationCarboxylic acid esters separation/purificationGranularityActive ingredient
The invention relates to the chemical field, and especially relates to a dimethyl fumarate preparation method. The method adopts a chemical way to control the crystal form and the granularity of a BG-12 raw agent in a one step manner. The method realizes re-crystallization and crushing operating processes in the prior art only through one operating process in order to obtain pharmaceutical production meeting granularity, so severe irritant reaction brought for operators is avoided, and the production safety is greatly improved. The method has the advantages of simplicity in operation, easiness in control of parameters, stable result, and suitableness for large-scale production. The raw medicine with different granularity ranges can be obtained through adjusting technological parameters in order to avoid dust pollution, difficulty cleaning and allergy brought by crushing.
Owner:HYBIO PHARMA
An ultrathin single crystal zn 3 (oh) 4 (no 3 ) 2 Structured hydroxyzinc nitrate nanosheets and preparation method thereof
ActiveCN110219052BGood single crystal morphologyEasy to shapeMaterial nanotechnologyPolycrystalline material growthChemical synthesisHydration reaction
The invention discloses an ultra-thin single crystal Zn 3 (OH) 4 (NO 3 ) 2 Hydroxyzinc nitrate nanosheets of structure and preparation method thereof, the preparation method of the hydroxyzinc nitrate nanosheets is as follows with hexahydrate zinc nitrate Zn(NO 3 ) 2 ·6H 2 O is the precursor, through the improved premixed flame synthesis method, the carrier gas is used to bring the precursor into the flame zone, and after passing through the temperature gradient of the flame zone, it is deposited on the surface of the water-cooled solid phase receiving plate to prepare the Zn 3 (OH) 4 (NO 3 ) 2 Structured 2D materials of hydroxyzinc nitrate nanosheets. The preparation method of hydroxyzinc nitrate nanosheets of the present invention overcomes unfavorable factors such as uneven product morphology, too many impurity phases, complicated experimental operations, and harsh conditions in complex chemical synthesis methods, and at the same time synthesizes ultra-thin nano-scale hydroxynitric acid for the first time Zinc-based substances to obtain Zn with excellent performance 3 (OH) 4 (NO 3 ) 2 Nanosheets.
Owner:NANJING UNIV OF SCI & TECH
Sandwich type hybrid porphyrin phthalocyanine double layer metal complex nanotube and its preparation method and application
InactiveCN106317091BSimple manufacturing methodThe experimental process is controllableGroup 3/13 organic compounds without C-metal linkagesMaterial resistancePorphyrinPhthalocyanine
The invention relates to a sandwiched porphyrin-phthalocyanine mixed double-layer metal complex (Eu(TpyP)(Pc)) nanotube and a preparation method and application thereof, and belongs to the technical field of organic semiconductor material chemistry. The Eu(TpyP)(Pc) nanotube is prepared for the first time; the method comprises the steps that 1, Eu(TpyP)(Pc) is dissolved by a specific solvent to form a solution with the concentration being 0.001-0.005 mmol / mL; 2, AAO is soaked into the solution prepared in the step 1, and placed for 8-12 h in a sealed mode; then, the solution is removed, and vacuum drying is performed; 3, a sodium hydroxide water solution with the concentration being 6 mol / L is used for dissolving the AAO in the Eu(TpyP)(Pc) nanotube containing the AAO prepared in the step 2. The preparation method is simple and effective, the experimental process is easy to control and can be executed under the room temperature. The Eu(TpyP)(Pc) nanotube is purified and orderly, toxic gas nitrogen dioxide can be detected under the room temperature, the toxic gas NO2 response concentration is low, the NO2 gas sensitive detection limit under the room temperature is low, response time and recovery time are short, and interference of CO and ammonia gas can be resisted.
Owner:UNIV OF JINAN
A kind of preparation method of 3-ethyl cefadroxil
Owner:TLC NANJING PHARMA RANDD CO LTD
Method for preparing stable porous amorphous calcium carbonate in alcohol solvent
PendingCN113651350ASimple process conditionsLow equipment requirementsCalcium/strontium/barium carbonatesAlkali metal chloridesChloride potassiumChemistry
The invention discloses a method for preparing stable porous amorphous calcium carbonate in an alcohol solvent, which comprises the following steps: respectively dissolving calcium chloride powder and potassium carbonate powder in ethylene glycol at normal temperature to obtain a calcium chloride ethylene glycol solution containing an alcohol-calcium chloride complex and a potassium carbonate ethylene glycol solution containing an alcohol-potassium carbonate complex; mixing the calcium chloride ethylene glycol solution and the potassium carbonate ethylene glycol solution, quickly stirring and uniformly mixing, and then standing and aging for 1 hour to 2 months; and after the reaction is finished, carrying out centrifugal treatment on the generated turbid liquid, treating the obtained precipitate by using glycerol to remove a byproduct potassium chloride, treating by using ethanol to remove glycerol on the surface, and finally centrifuging and drying the precipitate treated by using the glycerol and the ethanol to obtain white powder, namely pure porous amorphous calcium carbonate. The process is simple, the porous amorphous calcium carbonate of nano particles is generated through regulation and control of the alcohol-calcium chloride complex and the alcohol-potassium carbonate complex, and the obtained product is good in particle size uniformity.
Owner:HUBEI UNIV OF TECH
Test device and determining method for stability of liquid accelerating agent
ActiveCN108896711AImprove stabilityImproved stability assay timeMaterial analysisElectricityElectrophoresis
The invention discloses a test device and a determining method for stability of a liquid accelerating agent. The test device disclosed by the invention is composed of a low-temperature oil bath tank,an ultrasonic dispersion meter, a direct current power supply, an electrophoresis glass tubular column and a centrifugal machine; the electrophoresis glass tubular column is placed in an oil bath panof the low-temperature oil bath tank; the direct current power supply is electrically connected with the two ends of the electrophoresis glass tubular column; an oscillating end of the ultrasonic dispersion meter is arranged in the oil bath pan of the low-temperature oil bath tank. The test device disclosed by the invention utilizes the low-temperature oil bath tank to reduce the solute solubilityin a to-be-tested liquid accelerating agent, utilizes the ultrasonic dispersion meter and electrophoresis to accelerate the generation of crystal nucleus and utilizes the processes, such as solid-liquid separation by centrifuging, to enable the liquid accelerating agent to quickly lose stability and crystalize, so that the long-term stability of the liquid accelerating agent can be determined within a shorter period of time. The test device disclosed by the invention is simple and convenient in operation. The determining method has the advantages of excellent correspondence, high repeatability and the like for the test result of the stability of the liquid accelerating agent under current standard.
Owner:武汉优城科技有限公司
A sol-gel preparation method of cobalt-doped zinc oxide nanorods
ActiveCN105314672BImprove adsorption capacityAdjust electronic energy state structureMaterial nanotechnologyZinc oxides/hydroxidesAir atmosphereReaction temperature
Owner:XIAN TECH UNIV
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