3results 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 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.