34results about How to "Easy to promote in industrial applications" patented technology

The invention relates to a method for preparing an urchin-shaped hydroxyferric oxide and urchin-shaped ferric oxide nano material, which adopts a glucose guiding hydrolysis process and an annealing process and specifically comprises that: a ferrous salt is used as a raw material, the hydrolysis reaction is guided by adopting a saccharide structure indicator, the weight ratio of the glucose to an iron source is 0.5 to 5, and the molar concentration of the saccharide structure indicator is 0.02 to 0.2M; and then, an oxidizing gas is introduced into the raw materials at the temperature of between 25 and 100 DEG C, a yellow green urchin-shaped hydroxyferric oxide product is obtained through stirring reflux reaction, washing and filtration, and the product is annealed to form the urchin-shapedferric oxide nano material with adjustable specific surface area and topography. The method has the advantages of simple operation, low requirement for equipment, low cost and high efficiency, and iseasy in industrial application and popularization; and the synthesized nano material has the advantages of high purity, little impurity content and large specific surface area, can obviously improve the performance of a catalyst and a battery, and has remarkable economic benefit and social benefit.

The invention relates to a preparation method of an octahedron nickel nano micro-material. The preparation method comprises the following steps of: adopting a thermal decomposition-reduction process, that is to say: putting nickelous nitrate as a raw material into a vessel and carrying out thermal decomposition reaction with the reaction time of 30min to 10h and the reaction temperature of 30 to 500 DEG C; washing, filtering and drying gray black substances generated by the reaction to obtain an octahedron nickel oxide nano micro-material; and reducing the octahedron nickel oxide nano micro-material by adopting reducing gas at 300 to 450 DEG C to obtain the octahedron nickel nano micro-material. The invention has simple preparation flows, unique forming mechanism, easy industrial application and popularization, unnecessary addition of any die or plate surfactant or structure guiding agent in the reaction process, low cost and high efficiency; and the synthesized material has high purity, excellent microwave absorption performance and chemical catalysis effect as well as remarkable economic and social benefits and is suitable for preparing a catalyst or a microwave absorption material.

The invention discloses preparation and an application of a magnetic nanoring microwave absorbing agent, and particularly relates to a magnetic nanoring microwave absorbing agent with characteristics of good monodispersity and homogeneity, high magnetic responsiveness, excellent microwave absorbing performance, adjustable size and composition and the like as well as a preparation method and an application of the magnetic nanoring microwave absorbing agent. A magnetic nanoring adopts a polycrystalline structure formed by agglomeration of nanocrystallines and is oval, the length of a long axis is 28-175 nm, the length of a short axis is 18-130 nm, and the ring wall thickness is 7-35 nm; the magnetic nanoring comprises the component of Fe3O4, Fe3O4 / C or Fe / C with a spinel structure; ferric glycolate is taken as a precursor, and the magnetic nanoring is prepared by adopting an inert gas protective carbothermic reduction method-carbonization-solid-phase diffusion growth cooperation mechanism. The preparation and the application of the magnetic nanoring microwave absorbing agent are simple in process, low in cost and high in efficiency and facilitate industrial application and popularization, and the Fe3O4 and the carbon-magnetic nanoring have broad application prospects in the aspects of microwave absorption, a catalyst, an electrode material, a magnetic recording material, a biological sensor, separation or medical imaging.

The invention relates to a preparation method for a novel iron / carbon nano-tube grading nano-composite material. The method comprises the following concrete steps: adopting ceramic arks to respectively load a precursor of iron and an organic compound of carbon source; placing the ceramic arks in a tube furnace, heating to a temperature of 300-450 DEG C under the protection of inert gas, and holding the temperature for 30 minutes; continuously heating to the temperature of 450-900 DEG C, and holding the temperature for 1-4 hours; after completing the reaction, cooling to the room temperature along with the furnace under the protection of inert gas to obtain the novel iron / carbon nano-tube grading nano-composite material. According to the present invention, the preparation process is simple, and the forming mechanism is unique; the addition of any templates, any surfactants or any structural guideline agents during the reaction process is not required; the method has characteristics of low cost and high efficiency, and is easy to industrially apply and popularize; the prepared novel iron / carbon nano-tube grading nano-composite material has strong magnetic responsibility; the morphology and the composition of the iron / carbon nano-tubes can be controlled by the reaction temperature, the reaction time and the feed ratio.