Low-temperature ultrafast preparation method of ultrafine Fe3O4/RGO compound

A complex and ultra-fast technology, applied in chemical instruments and methods, magnetic field/electric field shielding, electrical components, etc., can solve problems such as high energy consumption, low efficiency, and time consumption, and achieve short time consumption, simple conditions, and reduced Cost Effect of Preparation

Active Publication Date: 2019-08-09
INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, these strategies generally have disadvantages such as time-consuming, low efficiency or high energy consumption.

Method used

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  • Low-temperature ultrafast preparation method of ultrafine Fe3O4/RGO compound
  • Low-temperature ultrafast preparation method of ultrafine Fe3O4/RGO compound
  • Low-temperature ultrafast preparation method of ultrafine Fe3O4/RGO compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Such as figure 1 As shown, the ultra-small Fe 3 o 4 Flowchart for the preparation of the / RGO complex

[0032] At room temperature 1.13g FeSO 4 ·7H 2O, 0.1g of BTO powder and 0.15g of GO were added to 200mL of deionized water, stirred by magnetic force for 10 minutes to mix evenly and form a precipitate, after standing, remove the supernatant, centrifuge the precipitate, and slowly pour into liquid nitrogen to freeze quickly , put it in a high-pressure reactor after freeze-drying; heat the reactor to 220 ° C to trigger a deflagration reaction, collect the obtained product after the reaction, wash it repeatedly with deionized water, and obtain Fe after drying in a vacuum oven. 3 o 4 / RGO complex.

Embodiment 2

[0034] At room temperature 2.26g FeSO 4 ·7H 2 O, 0.2g of BTO powder and 0.15g of GO in 200mL of deionized water were magnetically stirred for 8 minutes to make them mix uniformly and generate a precipitate; other steps were the same as in Example 1.

Embodiment 3

[0036] At room temperature 3.39g FeSO 4 ·7H 2 O, 0.3g of BTO powder and 0.15g of GO in 200mL of deionized water were magnetically stirred for 12 minutes to make them mix uniformly and generate a precipitate; other steps were the same as in Example 1.

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Abstract

The invention discloses a low-temperature ultrafast preparation method of an ultrafine Fe3O4 / RGO compound, and belongs to the technical fields of magnetic composite materials and electromagnetic waveabsorption. The low-temperature ultrafast preparation method of the ultrafine Fe3O4 / RGO compound comprises the following steps that step (1), a predetermined proportion of FeSO4 7H2O, BTO and GO are added into a certain amount of deionized water at the room temperature, magnetic stirring is carried out to make the FeSO4 7H2O, the BTO and the GO mixed uniformly, a [Fe(BTO)(H2O)2]n / GO compound is formed, standing is carried out, then a supernatant is poured out, lower precipitates are subjected to centrifugal separation, liquid nitrogen is added to submerge the [Fe(BTO)(H2O)2]n / GO compound to make the [Fe(BTO)(H2O)2]n / GO compound quick-frozen, and after freeze drying is carried out, the [Fe(BTO)(H2O)2]n / GO compound is put in a reaction kettle; step (2), the reaction kettle is heated, [Fe(BTO)(H2O)2]n in the [Fe(BTO)(H2O)2]n / GO compound is induced to be subjected to a deflagration reaction, after the deflagration reaction is completed, the obtained product is collected and washed with deionized water, and drying is carried out in a vacuum drying chamber to obtain the Fe3O4 / RGO compound.

Description

technical field [0001] The invention relates to the technical fields of magnetic composite materials and electromagnetic wave absorption, and more specifically relates to an ultra-small Fe 3 o 4 Low temperature ultrafast preparation method of / RGO composite. Background technique [0002] With the widespread use of electronic devices and communication devices in recent years, electromagnetic wave absorbing materials have attracted considerable interest due to their unique properties in solving electromagnetic pollution and interference problems. As we all know, high-performance electromagnetic wave absorbing materials need strong absorption, broadband, thin and thick, light weight, high thermal stability and other characteristics. Among all frequently reported materials, magnetic / dielectric nanocomposites are the most promising electromagnetic wave absorbing materials due to their high dissipation capability and optimized impedance matching. [0003] So far, many methods h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00H05K9/00
CPCH05K9/0081C09K3/00
Inventor 刘有松杨光成黄兵郑鹏李小东
Owner INST OF CHEM MATERIAL CHINA ACADEMY OF ENG PHYSICS
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