49results about How to "The experimental process is controllable" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.