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Hydro-thermal synthesis method for shape-controllable nano iron oxide

A nano-iron oxide, hydrothermal synthesis technology, applied in the direction of iron oxide, iron oxide/iron hydroxide, nanotechnology, etc., can solve the problem that nanoparticles cannot meet the size controllability and other problems, achieve novel process steps, realize size and cost low effect

Active Publication Date: 2014-04-30
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the nano-particles synthesized by the existing nano-iron oxide synthesis method cannot meet the requirements of size controllable in the range of 40-600nm, solid block to hollow tubular The problem of controllable morphology within the range provides a hydrothermal synthesis method of nano-iron oxide with controllable morphology

Method used

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  • Hydro-thermal synthesis method for shape-controllable nano iron oxide
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  • Hydro-thermal synthesis method for shape-controllable nano iron oxide

Examples

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Embodiment 1

[0027] A method for hydrothermal synthesis of nano-iron oxide with controllable morphology, comprising the steps of:

[0028] (1) Weigh 7.26g (0.03mol) of ferric nitrate (12.12g of ferric nitrate nonahydrate), add it to 580ml of deionized water, stir until completely dissolved, and obtain a precursor solution; the mass of deionized water is 80 times the mass of ferric nitrate ;

[0029] (2) Put the precursor solution in the reaction kettle, heat it to 170°C, and keep it warm for 2 hours; cool it down to room temperature, add deionized water and alcohol to the obtained product, oscillate fully, and centrifuge. The centrifugal speed in the centrifugation step is 3000rad / min, centrifuge twice, each time for 3min, remove the supernatant, move the contents to an electric vacuum drying oven, and dry until constant weight to obtain nanometer iron oxide. The nano-iron oxide has a triclinic tetragonal structure, and the crystal side length is about 40-60 nm. The SEM image is shown in...

Embodiment 2

[0031] A method for hydrothermal synthesis of nano-iron oxide with controllable morphology, comprising the steps of:

[0032] (1) Weigh 0.006g (0.00005mol) sodium dihydrogen phosphate, 0.092g (0.00053mol) potassium sulfate and 0.324g (0.002mol) ferric chloride (0.54g ferric chloride hexahydrate), mix and add 100 ml deionized In water, stir until fully dissolved to obtain a precursor solution; in the precursor solution, the mol ratio of phosphate ion and ferric ion is 0.25:10, and the mol ratio of strong acid and strong alkali salt to ferric ion is 2.65: 10. The quality of deionized water is 250 times the total mass of sodium dihydrogen phosphate, sodium sulfate and ferric chloride;

[0033] (2) Put the precursor solution in the reaction kettle, heat it to 200°C, and keep it warm for 2 hours; cool it to room temperature, add deionized water and alcohol to the obtained product, oscillate fully, and centrifuge. The centrifugal speed in the centrifugation step is 5000rad / min, ce...

Embodiment 3

[0035] A method for hydrothermal synthesis of nanometer iron oxide with controllable morphology, comprising the steps of:

[0036](1) Weigh 0.018g (0.00015mol) sodium dihydrogen phosphate, 0.092g (0.00053mol)

[0037] Potassium sulfate and 0.324g (0.002mol) ferric chloride (0.54g ferric chloride hexahydrate), mixed into 100ml deionized water, stirred until completely dissolved, to obtain a precursor solution; in the precursor solution, the phosphate ion and The molar ratio of ferric ions is 0.75:10, the molar ratio of strong acid and strong alkali salts to ferric ions is 2.65:10, and the quality of deionized water is 240% of the total mass of sodium dihydrogen phosphate, sodium sulfate and ferric chloride. times;

[0038] (2) Put the precursor solution in the reaction kettle, heat to 180°C, keep it warm for 2 hours; cool to

[0039] At room temperature, add the obtained product to deionized water and alcohol, fully oscillate, and centrifuge. In the centrifugation step, the c...

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Abstract

The invention relates to a preparation method for shape-controllable nano iron oxide and particularly relates to a hydro-thermal synthesis method for shape-controllable nano iron oxide. The hydro-thermal synthesis method comprises the following steps: (1) weighing dihydric phosphate, strong acid and strong alkali salts and trivalent iron salt; mixing and adding a mixture into de-ionized water; agitating until the mixture is completely dissolved to obtain a precursor solution, wherein the mol ratio of phosphate radical ions to trivalent iron ions in the precursor solution is (0-3) to 10; the mole ratio of the strong acid and strong alkali salts to the trivalent iron ions is (0-5) to 10; the mass of the de-ionized water is 50-300 times as much as the total mass of the dihydric phosphate, the strong acid and strong alkali salts and the trivalent iron salt; and (2) putting the precursor solution into a reaction kettle and heating to 150-250 DEG C and preserving the heat for 2-4 hours; cooling to the room temperature and adding the de-ionized water and alcohol into an obtained product; sufficiently shaking and centrifuging; removing liquid supernatant and transferring content matters into an electric heating vacuum drying box; drying until the weight is constant to obtain the nano iron oxide.

Description

technical field [0001] The invention relates to a preparation method of nano iron oxide, in particular to a hydrothermal synthesis method of nano iron oxide with controllable morphology. Background technique [0002] Iron oxide (Fe- 2 o 3 ) is cheap and non-toxic, and is widely used as a pigment in various fields such as coatings and building materials; in addition, it can also be used as a polishing agent for precision instruments and optical glass; magnetic materials such as electronic industry, communication machines, TV sets, computers, etc. Transformers, switching power supplies and their high U and high UQ ferrite cores, etc. Due to the unique surface effect and quantum size effect of nanomaterials, when the particle size of iron oxide reaches the nanoscale level, many potential physical and chemical properties, such as magnetism, catalytic performance, etc., are fully reflected, making nano-iron oxide in the magnetic field Materials, fine ceramics, industrial cata...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06B82Y40/00B82Y30/00
Inventor 李朋伟李刚桑胜波罗翠线胡杰张文栋
Owner TAIYUAN UNIV OF TECH
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