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Ferriferous oxide/tin oxide core-shell nanometer rod absorbing high-frequency electromagnetic wave and preparing method thereof

A technology of triiron tetroxide and nanorods, applied in the field of nanomaterials, can solve the problems of the width of the absorption frequency and the low absorption intensity, and achieve the effect of simple operation

Inactive Publication Date: 2009-11-25
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nanomaterial can absorb electromagnetic waves, but the width of the absorption frequency and the absorption intensity are low

Method used

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  • Ferriferous oxide/tin oxide core-shell nanometer rod absorbing high-frequency electromagnetic wave and preparing method thereof
  • Ferriferous oxide/tin oxide core-shell nanometer rod absorbing high-frequency electromagnetic wave and preparing method thereof
  • Ferriferous oxide/tin oxide core-shell nanometer rod absorbing high-frequency electromagnetic wave and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] (1) 40 milliliters of 0.5mol / L FeCl 3 The solution was placed in a 50ml stainless steel sealed autoclave. In an oven at 120°C for 12 hours. After the autoclave was naturally cooled to room temperature, the precipitate in the autoclave was washed with water and ethanol several times. After drying at 80°C, β-FeOOH nanorods were obtained, and then annealed at 500°C for 2.5 hours to obtain α-FeOOH nanorods 2 o 3 Nano stave;

[0021] (2) 0.08g α-Fe 2 o 3 The nanorods were ultrasonically dispersed into 32ml of water-ethanol solution, and then 0.75g of urea and 0.115g of potassium stannate (K 2 SnO 3 .3H 2 O, 95%). After stirring, the above solution was placed in a 50 ml stainless steel sealed autoclave. In an oven at 170°C for 36 hours. After the autoclave was naturally cooled to room temperature, the precipitate in the autoclave was washed with water and ethanol several times. α-Fe was obtained after drying at 80°C 2 o 3 / SnO 2 Core-shell nanorods, whose morph...

Embodiment 2

[0025] (1) 40 milliliters of 1.0mol / L FeCl 3 The solution was placed in a 50ml stainless steel sealed autoclave. In an oven at 100°C for 12 hours. After the autoclave was naturally cooled to room temperature, the precipitate in the autoclave was washed with water and ethanol several times. After drying at 80°C, β-FeOOH nanorods were obtained, and then annealed at 500°C for 2.5 hours to obtain α-FeOOH nanorods 2 o3 Nano stave;

[0026] (2) 0.08g α-Fe 2 o 3 The nanorods were ultrasonically dispersed into 32ml of water-ethanol solution, and then 0.75g of urea and 0.115g of potassium stannate (K 2 SnO 3 .3H 2 O, 95%). After stirring, the above solution was placed in a 50 ml stainless steel sealed autoclave. In an oven at 170°C for 36 hours. After the autoclave was naturally cooled to room temperature, the precipitate in the autoclave was washed with water and ethanol several times. α-Fe was obtained after drying at 80°C 2 o 3 / SnO 2 Core-shell nanorods;

[0027] (3)...

Embodiment 3

[0029] (1) 40 milliliters of 0.25mol / L FeCl 3 The solution was placed in a 50ml stainless steel sealed autoclave. In an oven at 110°C for 12 hours. After the autoclave was naturally cooled to room temperature, the precipitate in the autoclave was washed with water and ethanol several times. After drying at 80°C, β-FeOOH nanorods were obtained, and then annealed at 500°C for 2.5 hours to obtain α-FeOOH nanorods 2 o 3 Nano stave;

[0030] (2) 0.08g α-Fe 2 o 3 The nanorods were ultrasonically dispersed into 32ml of water-ethanol solution, and then 0.75g of urea and 0.115g of potassium stannate (K 2 SnO 3 .3H 2 O, 95%). After stirring, the above solution was placed in a 50 ml stainless steel sealed autoclave. In an oven at 170°C for 36 hours. After the autoclave was naturally cooled to room temperature, the precipitate in the autoclave was washed with water and ethanol several times. α-Fe was obtained after drying at 80°C 2 o 3 / SnO 2 Core-shell nanorods;

[0031] ...

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Abstract

The present invention provides a ferriferous oxide / tin oxide core-shell nanometer rod absorbing high-frequency electromagnetic wave and a preparing method thereof. The FeCl3 solution with the concentration of 0.25-1.0mol / L is placed in a hermetical high-pressure autoclave made of stainless steel and is kept for 12 hours in a baking oven in the temperature of 100-120 DEG C. After the high-pressure autoclave is naturally cooled to the room temperature, cleaning the deposit in the autoclave with water and ethanol. After dried in the temperature of 80 DEG C, the beta-FeOOH nanometer rod is obtained. Then the beta-FeOOH nanometer rod is annealed for 2.5 hours in the temperature of 500 DEG C, and the alpha-Fe2O3 nanometer rod is obtained. The 0.08g of alpha-Fe2O3 nanometer rod is ultrasonically dispersed into 32ml of water-ethanol solution. Then 0.75g of urea and 0.115g of potassium stannate are added. After mixing, the obtained solution is placed in the hermetical high-pressure autoclave made of stainless steel and is kept for 36 hours in the baking oven in the temperature of 170 DEG C. After the high-pressure autoclave is naturally cooled to the room temperature, the deposit in the autoclave is cleaned with water and ethanol. After drying in the temperature of 80 DEG C, the alpha-Fe2O3 / SnO2 core-shell nanometer rod is obtained. The alpha-Fe2O3 / SnO2 core-shell nanometer rod is annealed for 7 hours in the atmosphere of N2 / H2 in which the volume of the H2 accounts for 8% for obtaining the porous ferriferous oxide / tin oxide nanometer rod. The method of the invention has the advantages of simple operation and suitability for the industrial production.

Description

(1) Technical field [0001] The invention relates to a nanometer material, in particular to a porous triiron tetroxide / tin oxide core-shell nanorod with strong absorption properties for high-frequency electromagnetic waves. The invention also relates to a preparation method of the porous ferric iron tetroxide / tin oxide core-shell nanorod with strong absorption characteristics for high-frequency electromagnetic waves. (2) Background technology [0002] With the rapid development of nanotechnology, the application of nanomaterials in the field of electromagnetic wave absorption has attracted widespread attention at home and abroad. Metallic magnetic nanoparticles such as iron, cobalt, nickel, etc. have large magnetization and "snooker limit" in the high frequency range. Therefore, they can absorb high-frequency electromagnetic waves. However, the conductance of these metal particles is relatively large, and eddy current loss will occur under the action of an external field, t...

Claims

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Application Information

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IPC IPC(8): C09K3/00
Inventor 陈玉金朱春玲
Owner HARBIN ENG UNIV
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