50results about How to "Morphology regulation" patented technology

The invention discloses a preparation method of hollow calcium carbonate microspheres of micro-scale and nano-scale pore structures. The method includes the steps of dropwise adding a calcium chloride / polyvinylpyrrolidone (CaCl2 / PVP) mixed solution to a sodium dodecyl sulfonate (SDSN) solution at a constant stirring speed, dropwise adding a sodium carbonate / polyvinylpyrrolidone (Na2CO3 / PVP) mixed solution to the SDSN solution to react, standing, conducting ageing, washing and drying an obtained product, and calcining the product at a high temperature to obtain the hollow calcium carbonate microspheres. According to the method, morphology of the hollow calcium carbonate microspheres of the micro-scale and nano-scale pore structures can be controlled; the hollow calcium carbonate microspheres which are uniform in size distribution and comprise micro-scale pores and nano-scale pores at the same time can be obtained, and the method is simple, efficient, mild in reaction condition and capable of meeting the requirement for industrialized production.

The invention discloses a preparation method for metal ion printing chitosan porous micro-spheres and belongs to the technical field of parting material preparation. The preparation method comprises the following steps of: using an acetic acid aqueous solution to dissolve chitosan and metal salt to serve as a dispersion phase, using an organic solvent immiscible to water to dissolve a surface active agent and a cross-linking agent to serve as a continuous phase, using a shear action of the continuous phase to disperse the dispersion phase to form micron order liquid drops in microstructural equipment, enabling the liquid drops to complete crosslinking and solidification to form micro-spheres after certain retention time, finally eluting the organic solvent, the surface active agent, uncreated cross-linking agent, the metal ion and the like in the micro-spheres, and drying to obtaining the metal ion printing chitosan porous micro-spheres. The method is simple, convenient and rapid, and prepared metal ion printing chitosan porous micro-spheres are even in size, keep good network structures and effective adsorption position points and have the characteristics of big adsorption capacity, high speed and the like. The preparation method provides an effective means for mass preparation of high-performance metal ion adsorbing materials.

The invention discloses an in-situ doped nanometer molybdenum-based material as well as a preparation method and application thereof and belongs to the field of lithium ion battery preparation. The preparation method comprises the following steps of by taking 1,6-bis(triazole)hexane, ammonium heptamolybdate, manganous chloride, strontium chloride and phosphoric acid as starting materials, synthesizing manganese substituted organic-inorganic hybrid phosphmolybdate material with an intermediate temperate hydrothermal one-pot synthesizing method; and by taking a modified phosphmolybdate derivative as a precursor, performing high-temperature burning in a nitrogen environment to successfully prepare the porous doped nanometer molybdenum-based composite. In addition, a coralliform porous nanometer structure formed by a precursor method realizes regulation of morphology, particle size distribution, specific surface area and tap density of the molybdenum-based material, and thus the performance of a lithium ion battery is improved; and after 300 cycles under large current density of 500mA / g, the reversible capacity of a lithium ion capacitor-battery is still higher than 95 percent.

The invention relates to preparation and application of an electrocatalyst based on a transition metal macrocyclic compound. The specific steps include: mixing an acidic aqueous solution with an alkaline aqueous solution of the transition metal macrocyclic compound to make the transition metal macrocyclic compound form a nanostructured material by self-assembly, and carrying out washing, drying, heat treatment, pickling and other steps to obtain the non-noble metal electrocatalyst. The prepared non-noble metal electrocatalyst has a nano-structure with different shapes and uniform size distribution. The non-noble metal electrocatalyst prepared by the invention has oxygen reduction activity, and can be applied in proton exchange membrane fuel cells and metal air cells.

The invention provides a carbon nanotube and its preparation method and application, belonging to the technical field of carbon nanomaterials. The preparation method of the carbon nanotube provided by the present invention comprises the following steps: ball milling the transition metal salt, the phenolic compound and the non-ionic block copolymer to obtain a gel precursor material; The material is carbonized in a protective atmosphere, and then washed to obtain carbon nanotubes. The present invention prepares carbon nanotubes based on solid phase reaction and sol-gel method, has simple operation and low cost, is suitable for large-scale preparation, and the prepared carbon nanotubes have wide diameter, large specific surface area, high degree of graphitization, Good electrical conductivity and other advantages have great application value in electrochemical energy storage devices.

The invention relates to a silver nanocluster fluorescent nanorod and its preparation method and its application in white light LED. The fluorescent nanorod is made of Ag 9 Formed by self-assembly with hydrochloric acid in aqueous solution. Ag prepared by the present invention 9 Fluorescent nanorods have outstanding optical properties, and lyophilized fluorescent nanorods into powder still maintain excellent fluorescent properties, and can be made into stable and better LEDs that emit orange-red light. At the same time, they are compatible with commercial blue and green phosphors. , according to the mass ratio of 10:5:1 mixed to prepare white light emitting LED. Luminescent silver clusters can successfully replace the light conversion materials of traditional materials, which provides the possibility of making environmentally friendly LEDs. The preparation method of the silver nano-cluster fluorescent nano-rod of the invention is simple and low in cost; the prepared LED has excellent luminous intensity and meets the requirement of environmental protection.

The invention relates to the technical field of a preparation method of nano hydroxyapatite powder with a controllable morphology, and belongs to the scope of preparing nano hydroxyapatite powder with different morphologies by regulating an additive amount of a morphology regulator sodium polyacrylate and controlling coprecipitation synthesis conditions.