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an ultra-small fe 3 o 4 Low temperature ultrafast preparation method of /rgo complex

A complex, ultra-fast technology, applied in chemical instruments and methods, magnetic/electric field shielding, other chemical processes, etc., can solve the problems of time-consuming, high energy consumption, low efficiency, etc. The effect of reducing the cost of preparation

Active Publication Date: 2022-02-22
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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  • an ultra-small fe <sub>3</sub> o <sub>4</sub> Low temperature ultrafast preparation method of /rgo complex
  • an ultra-small fe <sub>3</sub> o <sub>4</sub> Low temperature ultrafast preparation method of /rgo complex
  • an ultra-small fe <sub>3</sub> o <sub>4</sub> Low temperature ultrafast preparation method of /rgo complex

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 an ultra-small Fe 3 o 4 The invention relates to a low-temperature ultra-fast preparation method of a RGO composite, which belongs to the technical fields of magnetic composite materials and electromagnetic wave absorption. Include the following steps: Step (1): at room temperature, FeSO 4 ·7H 2 O, BTO and GO were added to a certain amount of deionized water, stirred by magnetic force to mix them evenly, and formed [Fe(BTO)(H 2 O) 2 ] n / GO complex, pour off the supernatant after standing still, and centrifuge the lower part of the precipitate, add liquid nitrogen to submerge [Fe(BTO)(H 2 O) 2 ] n / GO complex to make it quick-frozen, and put it in the reactor after freeze-drying; step (2): heating the reactor to trigger [Fe(BTO)(H 2 O) 2 ] n / GO composite in [Fe(BTO)(H 2 O) 2 ] n A deflagration reaction occurs, and the obtained product is collected after the deflagration reaction, washed with deionized water, and dried in a vacuum oven to obtain Fe 3 o 4 / RGO complex.

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 Patents(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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