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Method for macroscopic preparation of Fe3O4 nanorods

A nanorod, fe3o4caso4 technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of low product purity and difficulty in large-scale production, and achieve simple process, easy control of conditions, good water solubility

Active Publication Date: 2016-05-25
HEFEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Compared with the solid phase reduction method, the products prepared by other methods have good thermal stability and high crystallinity, but it is usually difficult to carry out actual large-scale production
However, the solid-phase reduction method requires post-treatment processes such as calcination, and the resulting product has a lower purity.

Method used

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  • Method for macroscopic preparation of Fe3O4 nanorods
  • Method for macroscopic preparation of Fe3O4 nanorods
  • Method for macroscopic preparation of Fe3O4 nanorods

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Example 1 (Fe 2 SO 4 ·7H 2 O and CaSO 4 2H 2 O weight ratio is 2:1)

[0025] Step 1, Preparation of α-FeOOH / CaSO 4 2H 2 O precursor

[0026] (1) Add 2g of Fe 2 SO 4 ·7H 2 O was dissolved in 100 mL of distilled water, and magnetically stirred for 2 minutes at room temperature to fully dissolve it to obtain solution a.

[0027] (2) Add 1g of CaSO 4 2H 2 O solution was slowly added to solution a, and magnetic stirring was continued for 3 minutes to obtain brownish red suspension b.

[0028] (3) A small amount of ammonia water was added dropwise to adjust the pH value of the suspension b to 10 to obtain a dark brown solution c.

[0029] (4) Filter solution c, and then dry it in an oven at 100°C for 2 hours to obtain α-FeOOH / CaSO 4 2H 2 O precursor.

[0030] Step 2, preparation of Fe by solid phase reduction reaction 3 o 4 CaSO 4 , post-processing to get Fe 3 o 4 Nano stave

[0031] (1) A certain amount of α-FeOOH / CaSO 4 2H 2 The O precursor was put i...

Embodiment 2

[0037] Example 2 (Fe 2 SO 4 ·7H 2 O and CaSO 4 2H 2 O weight ratio is 1:1)

[0038] Step 1, Preparation of α-FeOOH / CaSO 4 2H 2 O precursor

[0039] (1) Add 2g of Fe 2 SO 4 ·7H 2 O was dissolved in 100 mL of distilled water, and magnetically stirred for 3 minutes at room temperature to fully dissolve it to obtain solution a.

[0040] (2) Add 2g of CaSO 4 2H 2 O solution was slowly added to solution a, and magnetic stirring was continued for 2 minutes to obtain brownish red suspension b.

[0041] (3) A small amount of ammonia water was added dropwise to adjust the pH value of the suspension b to 7 to obtain a dark brown solution c.

[0042] (4) Filter solution c, and then dry in an oven at 60°C for 6 hours to obtain α-FeOOH / CaSO 4 2H 2 O precursor.

[0043] Step 2, preparation of Fe by solid phase reduction reaction 3 o 4 CaSO 4 , post-processing to get Fe 3 o 4 Nano stave

[0044] (1) A certain amount of α-FeOOH / CaSO 4 2H 2 The O precursor was put into a...

Embodiment 3

[0047] Embodiment 3 (Fe 2 SO 4 ·7H 2 O and CaSO 4 2H 2 O weight ratio is 1:2)

[0048] Step 1, Preparation of α-FeOOH / CaSO 4 2H 2 O precursor

[0049] (1) Add 1g of Fe 2 SO 4 ·7H 2 O was dissolved in 100 mL of distilled water, and magnetically stirred at room temperature for 1 minute to fully dissolve to obtain solution a.

[0050] (2) Add 2g of CaSO 4 2H 2 O solution was slowly added to solution a, and magnetic stirring was continued for 3 minutes to obtain brownish red suspension b.

[0051] (3) A small amount of ammonia water was added dropwise to adjust the pH value of the suspension b to 12 to obtain a dark brown solution c.

[0052] (4) Filter solution c, and then dry it in an oven at 80°C for 6 hours to obtain α-FeOOH / CaSO 4 2H 2 O precursor.

[0053] Step 2, preparation of Fe by solid phase reduction reaction 3 o 4 CaSO 4 , post-processing to get Fe 3 o 4 Nano stave

[0054] (1) A certain amount of α-FeOOH / CaSO 4 2H 2 The O precursor was put int...

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Abstract

The invention provides a method for macroscopic preparation of Fe3O4 nanorods, and relates to the technical field of nanomaterials. The method comprises the following steps: dissolving Fe2SO4.7H2O into distilled water; adding CaSO4.2H2O and then carrying out ultrasonic dispersion to obtain suspension liquid; adjusting the pH value to 7-14, carrying out rapid oxidation reaction, and then filtering and drying the suspension liquid to obtain an alpha-FeOOH / CaSO4.2H2O precursor; carrying out reducing reaction on the alpha-FeOOH / CaSO4.2H2O precursor in reducing gas atmosphere to obtain Fe3O4@CaSO4 composite nano powder; and carrying out post-treatment to obtain the Fe3O4 nanorods. The overall preparation system is easy to build, simple and convenient to operate, low in cost and suitable for large-scale industrial production; the conditions are easy to control; the product composition is easy to control; and the product is uniform in particle size distribution and not easy to aggregate.

Description

technical field [0001] The invention relates to the technical field of nanomaterials, in particular to a macro-preparation of Fe 3 o 4 nanorod approach. Background technique [0002] Ferric oxide (Fe 3 o 4 ) nanorod is a functional material with excellent performance, which is widely used in coatings, plastics, rubber, ceramics, glass, cosmetics, pharmaceutical additives and other fields, and is the second largest inorganic pigment after titanium dioxide. In addition, it is also used as a raw material for the preparation of various ferrites, catalysts, polishing agents, magnetic fluids, magnetic recording materials, gas sensors, etc. with Fe 3 o 4 The soft ferrite material as the main component and the magnetic components made of it are a class of functional materials and basic components that are widely used, and their applications involve electronics, information, electromechanical, automobiles, metallurgy, aerospace, transportation, etc. Systems, engineering, biolo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08B82Y40/00B82Y30/00
CPCC01G49/08C01P2002/72C01P2002/85C01P2004/04C01P2004/16C01P2006/42
Inventor 韩成良庄林林张凌云周敏谢畅
Owner HEFEI UNIV
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