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Ordered inorganic-organic hybrid nano-material with room temperature ferromagnetism and preparation thereof

A room temperature ferromagnetic and organic hybrid technology, which is used in the manufacture of magnetic materials, magnetic objects, inductors/transformers/magnets, etc., to achieve the effect of simple process and low cost

Active Publication Date: 2019-03-12
INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method of preparing periodic inorganic-organic hybrid nanomaterials with room temperature magnetism through chemical solutions has not been reported

Method used

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  • Ordered inorganic-organic hybrid nano-material with room temperature ferromagnetism and preparation thereof
  • Ordered inorganic-organic hybrid nano-material with room temperature ferromagnetism and preparation thereof
  • Ordered inorganic-organic hybrid nano-material with room temperature ferromagnetism and preparation thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Iron acetylacetonate (5.25mmol) and selenium dioxide (6mmol) were dissolved in tetraethylenepentamine (TEPA, 60ml), and placed in a four-necked flask, after the high-purity nitrogen gas was removed from the air, under magnetic stirring, the The mixed solution was heated up to 180°C and kept for 0.5 hours; then the mixed solution was heated up to 280°C and kept for 3 hours to obtain the inorganic-organic hybrid nanomaterial (β-Fe 3 Se 4 ) 4 [Fe(TEPA)]. Cool down to room temperature, (β-Fe 3 Se 4 ) 4 [Fe(TEPA)] nanomaterials were centrifuged, washed 3 times with absolute ethanol, dried in vacuo, and stored in vacuo.

[0033] The crystal structure of the product was determined by X-ray diffraction, and the phase was determined to be tetragonal crystal structure (β-Fe 3 Se 4 ) 4 [Fe(TEPA)], such as figure 1 shown. Its scanning electron microscope (SEM) photo shows that (β-Fe 3 Se 4 ) 4 [Fe(TEPA)] nanosheets have a size of 500 nm-5 microns and a thickness of 100...

Embodiment 2

[0035] Iron acetylacetonate (5.25mmol) and selenium dioxide (6mmol) were dissolved in triethylenetetramine (TETA, 60ml), and placed in a four-necked flask, after the high-purity nitrogen gas was removed from the air, under magnetic stirring, the The mixed solution was heated up to 180°C and kept for 0.5 hours; then the mixed solution was heated up to 250°C and kept for 3 hours to obtain the inorganic-organic hybrid nanomaterial (β-Fe 3 Se 4 ) 4 [Fe(TETA) 4 / 3 ]. Cool down to room temperature, (β-Fe 3 Se 4 ) 4 [Fe(TETA) 4 / 3 ] The nanomaterials were separated by centrifugation, washed 3 times with absolute ethanol, dried in vacuo, and stored in vacuo.

[0036] The product (β-Fe 3 Se 4 ) 4 [Fe(TETA) 4 / 3 ] crystal structure, which is similar to that of (β-Fe 3 Se 4 ) 4 [Fe(TEPA)] same as Figure 7 shown. As-prepared inorganic-organic hybrid materials (β-Fe 3 Se 4 ) 4 [Fe(TETA) 4 / 3 ] (a) 300K and low temperature (b) 5K hysteresis loops of nanosheets, such as Fi...

Embodiment 3

[0038] Iron acetylacetonate (4.375mmol), chromium acetylacetonate (0.875mmol) and selenium dioxide (6mmol) were dissolved in triethylenetetramine (TETA, 60ml), and placed in a four-necked flask, and high-purity nitrogen was used to remove the air Finally, under magnetic stirring, the temperature of the mixed solution was raised to 180° C. and kept for 0.5 hours; then the temperature of the mixed solution was raised to 300° C. and kept for 3 hours to obtain an inorganic-organic hybrid nanomaterial. Cool down to room temperature, centrifuge the hybrid nanomaterials, wash with absolute ethanol three times, dry in vacuum, and store in vacuum. (β-Fe 2.5 Cr 0.5 Se 4 ) 4 The x-ray diffraction pattern of [Fe(TETA)], such as Figure 9 shown.

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Abstract

The purpose of the invention is to provide an ordered inorganic-organic hybrid nano-material with room temperature ferromagnetism and a preparation method thereof. The ordered inorganic-organic hybridnano-material with the room temperature ferromagnetism is prepared by a chemical liquid phase method; the inorganic-organic hybrid nano-material has a two-dimensional nano-sheet or nano-particle microstructure; the inorganic structural unit is [Beta]-Fe<3-x>M<x>Se<4-y>Q<y> with a tetragonal crystal structure, wherein M=Cr, Co; Q=S, Te; x is greater than or equal to 0 and less than 3; y is greaterthan or equal to 0 and less than 4; and the organic structural unit is a metal organic amine complex. The obtained inorganic-organic hybrid nano-material has a magnetic order temperature higher thanthe room temperature and has a periodic structure; and the preparation method of the ordered inorganic-organic hybrid nano-material with the room temperature ferromagnetism is simple in preparation, easy to obtain raw materials, short in preparation cycle and low in temperature, and can be used for synthesizing a sheet-like hybrid nano-material having a size of 500 nm to 6 [Mu]m and a thickness of100 to 300 nm, or a granulated hybrid nano-material of 50 to 500 nm.

Description

technical field [0001] The invention belongs to the field of magnetic organic functional nanometer materials, in particular to an inorganic-organic hybrid nanomaterial with a magnetic order temperature higher than room temperature and a periodic arrangement and a preparation method thereof. Background technique [0002] Different from inorganic-organic nanocomposites defined by phase domain scale, "inorganic-organic hybrid material" is a heterogeneous material with uniform chemical composition composed of organic phase and inorganic phase. According to different preparation methods, inorganic-organic hybrid nanomaterials can be divided into: (1) organic phase embedded in inorganic network; (2) inorganic phase embedded in organic network; (3) organic phase-inorganic phase formation Interpenetrating network structure; (4) forming a cross-linked structure through covalent bonds. For magnetic inorganic-organic hybrid nanomaterials, if the magnetic inorganic phase has formed a n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/00H01F41/00
CPCH01F1/0054H01F41/00
Inventor 李达潘德胜李勇冯阳刘伟张志东
Owner INST OF METAL RESEARCH - CHINESE ACAD OF SCI
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