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Preparation method of iron-based oxide aerogel

A technology of iron-based oxides and aerogels, applied in the direction of ferrous oxides, iron compounds, chemical instruments and methods, etc., can solve the problems of complex operation, high energy consumption, and long preparation cycle, and achieve high purity , large specific surface area, low density effect

Inactive Publication Date: 2017-12-01
HARBIN INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The present invention aims to solve the technical problems of high energy consumption, complicated operation and long preparation period of the existing preparation method of oxide airgel, and provides a preparation method of iron-based oxide airgel

Method used

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  • Preparation method of iron-based oxide aerogel
  • Preparation method of iron-based oxide aerogel
  • Preparation method of iron-based oxide aerogel

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specific Embodiment approach 1

[0023] Specific embodiment one: the preparation method of the iron-based oxide aerogel of the present embodiment is carried out according to the following steps:

[0024] 1. Weigh various metal element nitrates according to the stoichiometric ratio of various metal elements in the iron-based oxide, and then weigh the pore-forming reactant, wherein the pore-forming reactant is glycine (NH 2 CH 2 COOH) or citric acid, the molar ratio (M / G) of all metal element nitrates to pore-forming reagents is 1: (0.5-1.5); add all metal element nitrates and pore-forming reagents to an appropriate amount of deionized water , magnetic stirring to make it dissolve, and obtain the precursor solution;

[0025] 2. Under stirring conditions, heat the precursor solution to a temperature of 180°C to 220°C and keep it until the water is completely evaporated, and a self-propagating combustion reaction occurs to obtain the iron-based oxide aerogel.

specific Embodiment approach 2

[0026] Embodiment 2: This embodiment differs from Embodiment 1 in that the iron-based oxide is Fe 2 o 3 、CoFe 2 o 4 、NiFe 2 o 4 , MnFe 2 o 4 、BaFe 12 o 19 or Mn x Zn 1-x Fe 2 o 4 (x=0-1); other is the same as the first embodiment.

specific Embodiment approach 3

[0027] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the molar ratio (M / G) of all metal element nitrates and pore-forming reagents in step one is 1:0.6; others are the same as specific embodiment one or two the same.

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Abstract

The invention relates to a preparation method of iron-based oxide aerogel and mainly aims at solving the technical problems that an existing oxide aerogel preparation method is high in energy consumption, complex in operation and long in preparation period. The preparation method provided by the invention comprises the following steps: preparing nitrates of all the metallic elements in an iron-based oxide and a pore-forming reactant into solution, then heating until moisture in the solution is completely evaporated, and then carrying out self-propagating combustion reaction, so that the iron-based oxide aerogel is obtained. The preparation method provided by the invention has the advantages that equipment is simple, operation is easy, speed is high, energy consumption is low, raw materials are available, purity of the iron-based oxide in the prepared aerogel is high, and the prepared aerogel can be applied to the fields of sewage treatment, catalysts, high-energy batteries, sensitive materials, wave-absorbing materials as well as optics, electricity, magnetics and the like.

Description

technical field [0001] The invention relates to a preparation method of oxide airgel, which belongs to the field of inorganic nanometer materials with special appearance and function. Background technique [0002] Due to the good electrical, magnetic, optical and other physical properties of iron-based oxides, as well as the advantages of chemical stability and biocompatibility, it is widely used in ferromagnetic materials, ferroelectric materials, photoelectric materials, batteries, catalysis, targeted drugs, It is widely used in sewage treatment and microwave absorption. [0003] Airgel material is a material filled with gas in a spatial network structure, which has the characteristics of low density, large specific surface area, high porosity, and strong adsorption, and has been widely used in the fields of adsorption, catalysis, thermal insulation, etc. . [0004] Iron-based oxide airgel combines the advantages of the above two materials, and has outstanding characteri...

Claims

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Application Information

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IPC IPC(8): C01G49/06C01G49/08C01G49/00
Inventor 于永生韩光辉杨微微
Owner HARBIN INST OF TECH
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