4results 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 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.

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.