6results about How to "Composition is easy to control" patented technology

The invention discloses a preparation method of an efficient light-emitting silver-indium-sulfur and silver-indium-zinc-sulfur composite nano material, and belongs to the technical field of light-emitting nano materials and preparation. The preparation method comprises the following steps: by taking silver dibutyl dithiocarbamate, indium dibutyl dithiocarbamate and zinc carboxylate as precursors, uniformly mixing at a dodecane neutralization pretreatment temperature to form a mixed solution A; naturally cooling, adding dodecanethiol, and uniformly stirring and mixing to obtain a mixed solution B; at the reaction temperature, decomposing part of silver dibutyldithiocarbamate in the mixed solution B to generate silver sulfide clusters; the activity of the silver sulfide cluster is closely related to the size, the silver sulfide cluster is used as a seed to induce growth of silver-indium-zinc-sulfur, meanwhile, silver sulfide is converted into silver-indium-sulfur, finally, the silver-indium-sulfur and silver-indium-zinc-sulfur composite nano material is obtained, the band gap is 2.0-2.8 eV, the luminous efficiency is 52% or above, and the luminous efficiency can still be kept at 78% or above after five months. The preparation process disclosed by the invention is low in raw material cost and good in process controllability.

The invention discloses a microchannel reactor for synthesizing a high-activity double metal cyanide catalyst and a catalyst preparation method based on the microchannel reactor. The micro-channel reactor comprises a base plate, a cover plate and a temperature control element, wherein a micro-channel, three feeding pipelines, a plurality of sleeves and a plurality of pulse water injection pipelines are arranged on the upper surface of the base plate; the feeding pipeline is communicated with the micro-channel, and a plurality of sleeves are arranged on one side of the micro-channel; the sleeve feeding hole is communicated with the pulse water injection pipeline; the lower surface of the cover plate and the upper surface of the substrate are packaged through screws. And the temperature control element is arranged on the upper surface of the substrate or the lower surface of the cover plate. By adopting the microchannel reactor to prepare the DMC double-metal cyanide catalyst, the DMC double-metal cyanide catalyst which is more controllable in composition, better in particle size uniformity, higher in amorphous content and higher in catalytic activity can be obtained.

The invention discloses a preparation method and application of a high-entropy garnet type oxide solid electrolyte film, and relates to the technical field of garnet solid-state lithium battery design. The electrolyte film is prepared by the following steps: dispersing prefabricated Li5.25Ga0. 25La3 (ZrTiTaNb) 0.5 O12 sample powder in an absolute ethyl alcohol solution, spin-coating a silicon substrate with the dispersion liquid, and carrying out high-temperature heat treatment. According to the preparation method and the application of the high-entropy garnet type oxide solid electrolyte thin film, compared with a traditional granite type oxide solid electrolyte sheet, the high-entropy garnet type oxide solid electrolyte thin film is prepared; the high-entropy effect and cocktail effect generated by multiple elements in the high-entropy garnet type oxide solid electrolyte film endow the high-entropy garnet type oxide solid electrolyte film with excellent comprehensive properties such as high room-temperature ionic conductivity, good air stability, low sintering temperature and energy consumption, good interface wettability and lithium dendrite inhibition capability.

The invention discloses a carbon-coated pre-magnesium silicon monoxide negative electrode material and a preparation method thereof, the negative electrode material comprises a silicon core, a silicon-magnesium composite porous layer and a carbon-coated layer, the silicon-magnesium composite porous layer comprises MgSiO3 and Mg2SiO4 with porous characteristics, and the porosity is not less than 30%; the material shows a unique peak position and intensity relationship in an XRD diffraction pattern, and Mg2SiO4 is used as a main phase. According to the preparation method, through molten salt mediated low-temperature solid-phase reaction and addition of reducing gas during heat treatment, energy consumption is greatly reduced, a generated Mg2SiO4 crystal structure is more stable than traditional MgSiO3, and a porous structure (porosity is larger than 30%) formed through the cooperation reaction enables the material to maintain high capacity of 1621.49 mAh / g, meanwhile, the first efficiency is improved to 85.91%, and the cyclic expansion rate is reduced by 40% or above.

The invention discloses a CoOx / SnO2 hydrogen-sensitive material as well as a preparation method and application thereof, and belongs to the technical field of heterogeneous composite materials. Firstly, a tin source and a cobalt source are mixed to prepare a uniform solution, the pH value of the solution is adjusted to be alkaline, urea is added to adjust the existence form of cobalt ions, the solution serves as a morphology control agent of the material, the obtained mixed solution is subjected to ultraviolet ultrasonic treatment, aging, drying, grinding and heat treatment processes, and the target sensitive material is obtained. The material is large in specific surface area, adjustable in cobalt ion valence and high in oxygen defect distribution density, has the outstanding advantages of low working temperature, high sensitivity, good hydrogen selectivity and the like, and is particularly suitable for being applied to high-sensitivity, low-power-consumption and safe detection sensors required by hydrogen detection. The invention solves the technical problems that the existing hydrogen-sensitive material is easy to cause safety accidents due to too high working temperature, and the cost is high and the sensitivity is low due to the adoption of noble metal raw materials.

This invention discloses a synergistic catalytic degradation and recycling method for ultra-high molecular weight polyethylene (UHMWPE) fibers, relating to the field of polymer material recycling technology. The method includes: shearing, ultrasonically cleaning, and drying UHMWPE fibers to obtain pretreated fibers; dissolving a bis(acetylacetone)manganese(III) complex in a mixed solvent containing tert-butyl hydrogen peroxide and glacial acetic acid to prepare a chemical catalyst solution; adding the pretreated fibers to the solution for gentle heating and shaking treatment, followed by rinsing and drying to obtain pre-activated fibers; dispersing alkane hydroxylase AlkB in phosphate buffer, adding cofactors NADH and ferrous ammonium sulfate to prepare a biocatalyst suspension; adding the pre-activated fibers to the suspension for isothermal shaking culture for biocatalytic degradation; and obtaining oligomer / small molecule platform compounds through solid-liquid separation, concentration, alcohol precipitation, centrifugation, and drying. This invention achieves high-value-added recycling by efficiently degrading UHMWPE fibers under mild conditions through the synergistic effect of chemical and biocatalysis.