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 present invention relates to mono-dispersed fusiform nano-sheets and a preparation method thereof. According to the present invention, the fusiform nano-sheets are a polycrystalline structure formed by aggregating nano-crystal, the composition is a divalent and trivalent iron bimetallic layered glycollate [the structural formula is represented as the follow], a solvothermal method is used to change the temperature, the time, the amount ratio of the alkali to the metal salt substance, the alkali type, and the concentration of the doped metal ions so as to regulate the size of the fusiform nano-sheets (the long axis is 48-578nm, the ratio of the long axis to the short axis is 1.50-2.79, and the thickness is 11-51 nm); iron glycollate nano-sheets are subjected to a heat treatment for 1-3 h under a 300-500 DEG C air atmosphere to obtain the porous gamma-Fe2O3 nano-sheets; and the obtained nano-sheets of the prevent invention have characteristics of mono-dispersion property, good uniformity, adjustable size, adjustable composition and the like, and have wide application prospects in the fields of catalyst, inorganic pigments, water treatment, magnetic record materials, electrode materials, sensors, biomedical engineering, and the like.

The invention discloses a preparation method of a Co3O4 nanotube array; particularly, the preparation method comprises the steps: a precursor is laid flat on a heated basal plate for thermal decomposition reaction lasing for 2 minutes to 5 minutes with the temperature of 250 DEG C to 450 DEG C; and then a black material generated by the thermal decomposition reaction is washed, filtered and driedto obtain the Co3O4 nanotube array. The preparation method has the advantages of simple operations, low requirement on equipment, novel preparation processes, unique formation mechanism, easy application and generalization in industry, no adding of die and plate surfactant or structure directing agent in the reaction course, short period, low cost, high efficiency and being capable of being further integrated. The nanotube array synthesized by the preparation method has high purity, low impurity content, large specific surface area, wide application range including the use as an excellent material for lithium electrode, meets the requirements of electron-level powder materials, is capable of significantly improving the performance of cells and has obvious economic and social benefits.

The invention discloses a multi-scale uniform and single-dispersion magnetic microsphere and a preparation method of the multi-scale uniform and single-dispersion magnetic microsphere. The multi-scale uniform and single-dispersion magnetic microsphere comprises spinel structure ferrite doped with transition metal elements, the microsphere is a polycrystal micro-nano sphere which is formed by nanocrystalline in an aggregation mode, the diameter of the microsphere ranges from 20nm to 1.23 micrometers, the specific surface area of the microsphere ranges from 0.94 m<2>*g<-1> to 17.31 m<2>*g<-1>, and the size of the nanocrystalline ranges from 9.2nm to 25.8nm. A mixed solvothermal method is adopted, and the size and the composition of particles can be adjusted through adjustment of the volume fraction of water or the ratio of iron to other transition metal salt. According to the preparation method, raw materials are low in price, and can be easily obtained, the cost is low, the technology is simple, the requirement for equipment is low, efficiency is high, and popularization is easy; the multi-scale uniform and single-dispersion magnetic microsphere has the advantages that single dispersion and uniformity are good, and the size and the composition can be adjusted; the multi-scale uniform and single-dispersion magnetic microsphere can have the broad application prospect in the fields such as the magneto-rheological field, the magnetic separation field, the catalysis field, the electrode material field, the pigment field, the high-density magnetic recording material field and the medical diagnosis field.

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.

The invention discloses a monodispersed nano-sheet and / or a nano-ring as well as preparation and application thereof. The monodispersed nano-sheet and / or the nano-ring comprise(s) the component of beta-Co(OH)2. The preparation method of the nano-sheet adopts a mixed solvent liquid phase precipitation method, namely: firstly, adding cobalt salt, distilled water, an organic solvent and alkali to a beaker in a stoichiometry ratio, wherein the volume ratio of the distilled water to the organic solvent is (3-9):1, the concentration of the cobalt salt is 2.5-10mM, and the weight ratio of the alkali to the cobalt salt is (6-24):1; then, mixing the cobalt salt, the distilled water, the organic solvent and the alkali for 10-20 min, and then performing a stirring and regurgitation reaction at the temperature of 70-100 DEG C for 0.5-2h; after cooling, performing washing, filtration and drying so as to obtain the monodispersed beta-Co(OH)2 nano-sheet. The monodispersed nano-sheet and / or the nano-ring, as well as the preparation and the application thereof, disclosed by the invention, are simple to operate and low in temperature, have low requirements for equipment, and are low in cost, high in efficiency, and easy to industrially apply and generalize.

The invention relates to a magnetic alloy hollow microsphere and a preparation method thereof. The components of the microspheres are cobalt and nickel, and its structural formula is Co x Ni 1‑x , where: 0.14≤x≤1; it has a hollow structure with a diameter of 0.32-3.35μm and a wall thickness of 4-370nm; its saturation magnetization is 80.4-152.89emu·g –1 . The microspheres are made by the mixed solvent high-temperature liquid phase reduction method: first add the organic solvent, water and surfactant into the three-necked flask according to a certain ratio, and stir for 10 minutes; then add the metal salt and stir for 2 hours, and drop the reducing agent Electric stirring for 1 hour, then condensing and reflux at 170-197°C for 3-4 hours, cooling, washing with ethanol for multiple magnetic separation, and finally drying to obtain the required magnetic alloy hollow microspheres. The raw materials of the invention are cheap and easy to obtain, low in cost, simple in process, high in efficiency, and easy to popularize; the magnetic ball chain has the characteristics of adjustable size and composition, and can be used in magnetorheology, magnetic separation, catalysis, electrode materials, microwave absorption or high density Applications in magnetic recording materials.

The invention discloses a magnetic ball chain and a preparation method thereof. The component of the magnetic ball chain is spinel type ferrite and is of a one-dimensional hollow or porous chain structure, the diameter is 0.24-1.60 micrometers, the chain length is 1.25-11.3 micrometers, the length-diameter ratio is 1.23-10.2, and the specific surface area is 1.42-57.8 m<2>.g<-1>. The magnetic ball chain is prepared by adopting a magnetic field induction solvent hot method, particularly, metal salt, a surface active agent and ethylene glycol are stirred in a lining of polytetrafluoroethylene, ethidene diamine is added into the lining, the mixture is mixed and stirred for 1-2 h, the lining is placed into a stainless steel kettle, 1-2 high-temperature powerful magnets are placed on the bottom or top of the lining, a reaction is performed for 6-24 h at the temperature of 210-240 DEG C, water and ethyl alcohol are used for centrifugal and magnetic separation and washing after cooling, and finally drying is performed. The raw materials are cheap and easy to obtain, and the magnetic ball chain is low in cost, simple in technology, high in efficiency and easy to popularize. The magnetic ball chain has the advantages that the size and composition are adjustable and the like, and can be applied to magneto-rheological, magnetic separation, catalysis, electrode materials, microwave absorption and high-density magnetic recording materials.

The invention relates to a monodisperse magnetic nanoring as well as a preparation method and an application of the monodisperse magnetic nanoring. The magnetic nanoring has a polycrystalline structure formed through agglomeration of nanocrystalline, the shape is an elliptical shape, the length of long axis is 76-354nm, the ratio of the long axis to short axis is 1.30-2.66, diameter ratio of the long axis of the nanoring is 0-0.88, the thickness of the nanoring is 20-40nm, and the component is spinel structure Fe3O4. The magnetic nanoring is good in monodispersity and uniformity, strong in magnetic responsiveness, adjustable in size and the like. The magnetic nanoring is applied in catalysts, electrode materials, magnetic recording materials, magnetic sensors, detection, bioseparation or medical imaging. The preparation method of the magnetic nanoring adopts microwave-assisted hydrothermal-reduction-etching method or hydrothermal-reduction-etching method. The preparation method is simple in process, mild in condition, environment-friendly and energy-saving. The preparation method is applied to preparing other doped magnetic oxides or magnetic composite nanorings.