109results about How to "The preparation process is simple and safe" patented technology

The invention discloses a high-performance polycarboxylate water reducing agent. The polycarboxylate water reducing agent has a structural general formula shown as a structural formula (I). The invention further provides a preparation method of the high-performance polycarboxylate water reducing agent. Apart from a polyether macromonomer and an unsaturated carboxylic acid monomer, an unsaturated phosphate monomer is added to obtain a product, namely, the high-performance polycarboxylate water reducing agent having a phosphate structure. The polycarboxylate water reducing agent disclosed by the invention is safe and simple in preparation process, environmentally friendly, low in energy consumption, low in cost, and suitable for industrial large-scale production. In the structural formula (I), R1 is -H, -COO- or -CH2COO-; R2 is -H or -CH3; R3 is -H or -CH3; R4 is -H or -CH3; R5 is -H or -CH3; R6 is -CH2- or -CH2CH2-; X, Y, Z and n are integers; X=1-100; Y=1-100; Z=1-100; and n=22-53.

The invention relates to a method for preparing a double-component metallic oxide catalytic ozonation catalyst. The method is characterized in that, after being activated, gamma-Al2O3 microballoon is soaked in mixed liquor of manganous nitrate and cerous nitrate, and then after drying and roasting, the loading type manganese and cerium double-component composite catalyst is prepared. The catalyst has high catalytic activity, is applied in organic pollutant degradation through catalytic ozonation, remarkably fastened in degradation rate compared with degradation using ozone singly or using unloaded gamma-Al2O3 microballoon, greatly improved compared with loading catalyst using single component of manganese or cerium and capable of reducing input amount of ozone, and according saves operation cost. Simultaneously, the catalyst has the advantages of being simple in preparing method, low in cost, stable in catalytic performance, capable of being repeatedly used and the like and is favorable for popularization and application of the catalytic ozonation technology.

The invention discloses a novel coronavirus detection kit. The kit comprises a qRT-PCR reaction liquid, a qRT-PCR enzyme liquid, an internal standard, a negative quality control substance and a positive quality control substance, wherein the internal standard is an RNA pseudovirus containing an internal reference detection gene fragment; the positive quality control substance is an RNA pseudoviruscontaining a target detection gene fragment; and the qRT-PCR reaction liquid comprises four groups of upstream and downstream primers with sequences of SEQ ID NO:1-8 and four probes with sequences ofSEQ ID NO:9-12. The kit can be used to simultaneously detect three sections of target gene fragments, so that missed detection can be effectively avoided. In addition, pseudoviruses are used in boththe internal standard and the positive quality control substance of the kit, so that safety of the kit is effectively improved, and detection accuracy of the kit is further ensured. The kit is high sensitivity and good in stability.

The invention discloses an SCR (Selective Catalytic Reduction) denitration catalyst as well as a preparation method and the application of the catalyst, wherein, sulfated zirconia is taken as a carrier, the surface of the carrier is loaded with rare-earth metal oxides that are taken as active ingredients and is loaded with transition metal oxides that are taken as a cocatalyst. The preparation method of the catalyst comprises the steps as follows: (1), zirconia is soaked in sulfuric acid solution, and the sulfated zirconia carrier is obtained after drying and burning are carried out; and (2), the zirconia carrier is in contact with ionic or complexing metal to be loaded proportionally in any sequence, adsorption is performed, and then the SCR denitration catalyst is obtained after drying and burning are carried out. The SCR denitration catalyst achieves excellent alkali metal and alkaline earth metal poisoning resistance when being used for the flue gas denitration, and is especially suitable for the flue gas denitration when the content of alkali metal or alkaline earth metal in flue gas is higher; the denitration efficiency of the SCR denitration catalyst stabilizes at more than 95 percent under a certain condition; and the denitration efficiency can still stabilize at more than 90 percent after being soaked in alkali metal solution or alkaline earth metal solution.

The invention belongs to the regulation and control technical field of electrical property of a transistor, and relates to a regulation and control method for electrical property of an indium oxide nanofiber field effect transistor. In<2>O<3> nanofibers are prepared through a simple, convenient and low-cost electrospinning technology; the electrical property of the In<2>O<3> nanofiber field effect transistor is regulated and controlled through simple and feasible metal doping so as to regulate and control the electrical property, such as a threshold voltage, an off-state current, a switching ratio and the like, of the In<2>O<3> nanofiber field effect transistor in a simple and convenient, efficient and low-cost manner, in order to obtain the excellent-performance and metal-doped In<2>O<3> nanofiber field effect transistor; the preparation process is simple, convenient, and safe, and the principle is reliable, and the production cost is low; and the prepared In<2>O<3> nanofibers and the metal-doped In<2>O<3> nanofibers have wide application prospect in the fields of an electronic switching device, a display, biological and chemical sensors and the like, and large-scale industrial production can be performed easily.

A preparation method for a bismuth oxyiodide/graphene oxide compound visible light catalytic material relates to a preparation method of the visible light catalytic material. The preparation method aims at solving the problems in the compound light catalytic material prepared through the existing method of being complex in operation, long in periodicity, high in requirement for devices and not suitable for large-scale production. The bismuth oxyiodide/graphene oxide compound visible light catalytic material is prepared through iodide, Bi(NO3)3-5H2O and the graphene oxide dispersion liquid. The method includes: 1 preparing graphene oxide dispersion liquid; 2 mixing and stirring iodide, Bi(NO3)3-5H2O and the graphene oxide dispersion liquid to obtain turbid liquid; and 3 conducting ultrasonic processing, then filtering, washing and drying sequentially to obtain the bismuth oxyiodide/graphene oxide compound visible light catalytic material. The preparation method is mainly used for preparing the bismuth oxyiodide/graphene oxide compound visible light catalytic material.

The invention discloses a method for preparing bis(fluorosulfonyl)imide salt. The method comprises the following steps: reacting bis(chlorosulfonyl)imide and a fluorination reagent to obtain bis(fluorosulfonyl)imide; and reacting the bis(fluorosulfonyl)imide and an alkali metal salt chelator to obtain the corresponding bis(fluorosulfonyl)imide salt. The method provided by the invention does not need the use HF and other high-activity compounds, and is simple and safe in preparation process, thereby being suitable for industrialization application.

The invention discloses a method for preparing a graphite phase carbon nitride nanosheet through airtight oxidation. The method comprises the following steps: with a layered graphite phase carbonitride material as a raw material, putting the layered graphite phase carbonitride material, potassium permanganate and concentrated sulfuric acid in an enclosed reaction vessel with a polytetrafluoroethylene lining for a pressurized oxidation reaction so as to obtain oxidized graphite phase carbon nitride; removing unreacted potassium permanganate with hydrogen peroxide; carrying out washing with hydrochloric acid and distilled water; and then carrying out drying so as to obtain the graphite phase carbon nitride nanosheet. Compared with conventional methods, the method provided by the invention has the advantages of less operation steps, low temperature requirement and short reaction time. The prepared graphite phase carbon nitride nanosheet has high purity and few structural defects and has extensive application prospects in fields like heterogeneous catalysis, photocatalysis and biological imaging.

This invention relates to a cobalt aluminum hydrotalcite/fluorinated graphene composite material, and a preparation method thereof. The composite material is prepared by the steps of: 1) preparing graphite oxide powder by a Hummers method; 2) dispersing the graphite oxide powder in deionized water; stripping by an ultrasonic cell crusher; centrifuging by a centrifuge; obtaining supernatant liquor; adding hydrofluoric acid solution in the supernatant liquor to stir and react; putting the solution into a high-pressure reactor to perform constant-temperature fluoridation; cooling to room temperature; filtering and washing till the solution is neutral, so as to obtain the fluorinated graphene; 3) dispersing the fluorinated graphene in ethanol solution; stripping by the ultrasonic cell crusher to obtain fluorinated graphene suspension; 4) adding cobalt sulfate heptahydrate, aluminum chloride hexahydrate and urea into the fluorinated graphene suspension to stir and react; putting the solution into the high-pressure reactor to perform hydrothermal reaction; then cooling to the room temperature; and obtaining the cobalt aluminum hydrotalcite/fluorinated graphene composite material after post-processing.

The invention discloses a preparation method and application of rice-like alpha-iron trioxide. The preparation process adopts a hydrothermal reaction method, and the specific steps are as follows: first, mechanical stirring is used to uniformly disperse the iron salt and the surfactant in deionized water to obtain a mixed solution; the mixed solution is placed in a reactor for hydrothermal reaction; finally, the obtained The product is washed and freeze-dried to obtain a precursor; then the precursor is calcined at 200-900° C. for 1-40 hours, cooled to room temperature and ground to obtain red rice-like ferric oxide powder material. The invention has the advantages of wide source of raw materials, simple preparation method, convenient operation, green and pollution-free, and the obtained material has high structural purity, regular morphology and uniform particle size distribution. It can reach more than 1000mAh/g, and has better cycle life.

The invention discloses a preparation method and application of a corn starch porous carbon packaged core-shell structure silicon/carbon material. The preparation method comprises the following steps: firstly, preparing a buffering solution; adding the buffering solution and amylase into corn starch; carrying out enzymolysis in a water bath under a magnetic force; carrying out washing and drying treatment on the corn starch; then, carrying out pre-oxidization and putting a pre-oxidized material into a muffle furnace; carrying out calcination in a protective atmosphere to obtain a target product; taking nano silicon powder and glucose and carrying out magnetic stirring and ultrasonic dispersion; transferring suspension liquid into a high-pressure reaction kettle and carrying out hydrothermal reaction; after cooling the material to room temperature, carrying out water washing and drying; transferring the material into a tubular furnace and carrying out the calcination in the protective atmosphere; cooling and grinding to obtain a target product; weighing corn starch porous carbon and a core-shell structure silicon/carbon material and stirring and dispersing; then carrying out vacuumizing, water washing and drying to obtain a target product. When the material prepared by the preparation method is used as a negative electrode material of a lithium-ion battery, the material has relatively good cycle life and rate performance.

The invention discloses an environment-friendly water-based automobile shellac cleaning agent. The environment-friendly water-based automobile shellac cleaning agent consists of the following components: fatty alcohol-polyoxyethylene ether phosphate, limonene, fatty acid diethanol amide, sodium carbonate and deionized water. The cleaning agent is prepared by compounding various non-toxic surfactants with excellent biodegradability and aids, has obvious synergistic effect among the components, can effectively remove shellac dirt form the surface of the automobile and has a good anti-rust effect on metal. The production method is simple to operate and low in production cost, and has good environmental and economic value.

The invention discloses a preparation method and application of corn starch porous carbon@graphite. The preparation method comprises the steps of firstly, weighing disodium hydrogen phosphate and citric acid to prepare a buffer solution, slowly adding the buffer solution and amylase to corn starch, performing water bath, performing enzymolysis under magnetic stirring, and cleaning and drying the solution; secondly, performing pre-oxidation; and finally, placing the pre-oxidized material in a muffle furnace for calcination, wherein the selected corn starch porous carbon is of a spherical structure, macropore structures and mesoporous structures are formed in a spherical surface by simple enzymolysis, pre-oxidization and carbonization technologies, the corn starch porous carbon prepared in the previous steps and a graphite material are accurately weighed and are placed in an agate ball milling tank according to a certain proportion, ball-milling and mixing are performed by an XQM planetary ball-milling machine, and drying and grinding are performed to obtain a target product. The preparation method has the advantages that the preparation process is simple and safe, and the prepared battery negative electrode has relatively long cycle lifetime and rate performance.

The invention discloses novel heterotantalate. A chemical formula of the novel heterotantalate is K3[H3P4(TaO2)6(OH)4O20].12H2O, the crystal belongs to the monoclinic system, the space group is P2(1/C), the lattice parameter is a=12.6862(10)angstrom, b=9.9322(8)angstrom, c=16.8359(13)angstrom, and beta=105.3940(10)angstrom. The novel heterotantalate is prepared by enabling potassium hexatantalate to react with phosphoric acid under a conventional hydrogen peroxide solution condition. The material has high stability, and has the performances of photocatalytically degrading Rhodamine B, azophloxine and methyl blue; furthermore, the novel heterotantalate is simple in preparation process, easy to operate, low in cost, high in yield, and has a potential application prospect.

The invention relates to a Cu3SnS4/Cu2SnSe3 composite photocathode for a photoelectrochemical solar cell and a preparation method of the Cu3SnS4/Cu2SnSe3 composite photocathode. The preparation method includes the steps that firstly, Cu3SnS4 nano-particles with the diameter ranging from 200 nanometers to 300 nanometers and Cu2SnSe3 nano-particles with the diameter ranging from 250 nanometers to 350 nanometers are synthesized through the solvothermal method; secondly, mechanical agitation and ultrasonic treatment are carried out on the Cu3SnS4 nano-particles and the Cu2SnSe3 nano-particles respectively, and the Cu3SnS4 nano-particles and the Cu2SnSe3 nano-particles are dissolved in deionized water to form 'ink' through ultrasonic treatment; thirdly, the black 'ink' is applied to a conducting substrate, and then annealing is carried out for 0.5-1h under the temperature of 450DEG C-550DEG C to obtain the mesoporous Cu3SnS4/Cu2SnSe3 composite photocathode. According to the method, the mesoporous Cu3SnS4/Cu2SnSe3 composite photocathode adopted as the photocathode of the photoelectrochemical solar cell is good in corrosion resistance, large in specific area, good in catalytic performance and conductivity and low in production cost; the photoelectric conversion efficiency of the cell prepared through the method is as high as that of a traditional Pt counter electrode, and therefore the method is suitable for industrialized production of photoelectrochemical solar cells.

The invention discloses a production process of fragrant peanut oil, and belongs to the field of edible oil processing. The production process mainly comprises the following steps: firstly, removing stones from peanut raw materials, screening and carrying out color sorting; removing impurities, removing peanut coat, crushing peanut kernels, sieving to obtain crushed peanut kernels, adding the crushed peanut kernels into finished peanut oil, mixing, stirring, heating, pressurizing, cooling to room temperature, centrifuging to obtain peanut oil, adding carclazyte and perlite, stirring, and finally filtering to obtain the fragrant peanut oil. The technological process is simple, safe, convenient to operate and low in energy consumption, and special protection requirements are not needed. Theobtained fragrant peanut oil meets the national and industrial standards and has a very strong oil flavor and is a new peanut oil product.

The invention relates to a Cu2ZnSnS4 / MWCNT nano composite counter electrode for a dye-sensitized solar cell and a preparation method thereof. The method comprises following steps that: (1) a hot solvent method is used to synthesize a Cu2ZnSnS4 nanoparticle with a diameter of 200 to 300 nanos; (2) an MWCNT is immersed in a sulfuric acid and nitric acid mixed solution, so as to improve dispersibility of the mixed solution; (3) a Cu2ZnSnS4 / MWCNT nano composite material is stirred and carries out ultrasonic processing so that the composite material is mixed evenly, and the Cu2ZnSnS4 / MWCNT is dissolved in deionized water and forms "ink" by the ultrasonic processing; and (4) a spinning coating method is used so that black "ink" is coated on a conductive substrate, and then the Cu2ZnSnS4 / MWCNT composite counter electrode is obtained by annealing in 450 to 550 DEG C for 0.5 to 2 hours. According to the method, the Cu2ZnSnS4 / MWCNT having good corrosion resistance serves as the counter electrode of the dye-sensitized solar cell, so as to achieve the large surface area, good catalytic and conductive properties, and low production cost; and the battery which is manufactured with adoption of the preparation method, has the same photoelectric conversion efficiency as the battery based on a conventional Pt electrode, is suitable for application to the dye-sensitized solar cell, and is beneficial to the industrialization development of the dye-sensitized solar cell.

The invention relates to an insulating potting wax composition. The composition comprises 72-88% of petroleum wax, 1-6% of Fischer-Tropsch wax, 1-20% of tackifiers and 1-20% of vaseline. The insulating potting wax composition has the characteristics of excellent high temperature performance and corrosion resistance, excellent electrical performance, good moisture resistance and the like, and is not only suitable for insulating impregnating and potting of electronic transformers and high frequency transformers but also suitable for insulating impregnating and potting of inductance coils and other special coils for electronic components.

The invention discloses a preparation method of a ratio oxygen sensing film for detecting the contents of dissolved oxygen, relates to the preparation method of the ratio oxygen sensing film, and aimsat solving the problem that the existing ratio oxygen sensing methods are high in cost and bad in photo-bleaching resistance due to the reason that to-be-tested water samples are polluted and cannotbe recovered. The method comprises the steps of 1, uniformly dispersing azobisisobutyronitrile solution in St/TFEMA mixed solution, copolymerizing the mixed solution under nitrogen protection to obtain copolymer solution, and carrying washing and suction filtration; 2, mixing PtOEP/toluene solution with C6/toluene solution to obtain mixed indicator solution, re-dissolving the copolymer solution intoluene to obtain copolymer/toluene solution, mixing the copolymer/toluene solution with the mixed indicator solution, applying the obtained mixed solution on a quartz plate, and carrying out dryingto obtain the ratio oxygen sensing film. The ratio oxygen sensing film can be recycled for multiple times, has no pollution to the environment, and has photo-bleaching resistance. The method is used in the field of dissolved oxygen detection.

The invention belongs to the field of thin film transistors, and relates to a metallic oxide thin film transistor and a preparation method thereof. The thin film transistor includes an insulating substrate, a gate electrode, a gate insulating layer, a metallic oxide semiconductor layer, a source electrode and a drain electrode. The insulating substrate is located at the bottommost layer of an organic thin film transistor, the gate electrode, the gate insulating layer and the metallic oxide semiconductor layer are sequentially stacked on the insulating substrate from bottom to top, and the source electrode and the drain electrode are separately located above the metallic oxide semiconductor layer. According to the preparation method of the metallic oxide semiconductor thin film, the performance and carrier mobility of a ZnO-based thin film transistor prepared by an aqueous solution method in the prior art are improved by adding an alkali metal compound to a polymeric precursor solution,the preparation process is simple, the production cost is low, and the whole process temperature is controlled within 300 DEG C.

The invention relates to a method for preparing a nano-calcium carbonate whisker/hexagonal boron nitride nanocomposite material. The method comprises stripping hexagonal boron nitride through a simpleultrasonic method, adding the stripped precursor into a calcium chloride solution and synthesizing the nano-calcium carbonate whisker/hexagonal boron nitride nanocomposite material through a simple solution method. The method is simple and safe, realizes a low cost, needs a low temperature and can synthesize calcium carbonate whisker having diameters of about 50nm and good overall uniformity. Thenano-calcium carbonate whisker in the nano-calcium carbonate whisker/hexagonal boron nitride nanocomposite material has a length-diameter ratio of 25-50 satisfying the industrial application requirement. The hexagonal boron nitride has strong oxidation resistance, high temperature resistance and good mechanical properties. The material performances are further improved in application.