Preparation method for Fe3O4 nano particles

A technology of nanoparticles and particles, which is applied in the field of nanomaterials to achieve excellent performance and uniform size

Inactive Publication Date: 2008-01-09
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

So far, there is no report on the preparation of Fe by arc discharge in water

Method used

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  • Preparation method for Fe3O4 nano particles
  • Preparation method for Fe3O4 nano particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Example 1: Small size Fe 3 O 4 Synthesis of Nano Magnetic Particles:

[0026] Using the equipment shown in FIG. 1, the material of the cathode electrode 1 is a spectral pure graphite rod, and the material of the anode electrode 2 is an industrial pure iron metal rod. Place the two poles in a reaction vessel 4 filled with deionized water 3, align the centers and maintain a certain initial distance. 5 and 6 are the holders of the cathode and anode respectively, and 7 is the guide rail, which is used to drive the anode forward and backward. Use DC power supply and adjust the distance between the two poles in time through the self-feedback system to maintain a stable output voltage and generate a stable arc between the cathode and anode. The self-feedback system includes a control circuit and a stepper motor controller; the detection signal input end of the control circuit is connected to the clamper of the cathode and anode, and the control signal input end of the stepper moto...

Embodiment 2

[0032] Example 2: Fe with an average particle size of about 20nm 3 O 4 Synthesis of Nano Magnetic Particles:

[0033] Other experimental conditions are the same as in Example 1. The power supply parameters are set as: discharge current: 60A, discharge current density: 2.1A / mm 2 ; Discharge voltage: 19V.

[0034] Fe prepared 3 O 4 The nano particles are basically spherical, the particle size is basically distributed in the range of 15-35nm, and the average size is about 20nm. About 80% of the product is spherical Fe 3 O 4 Nano particles, and a small amount of nano carbon film. The saturation magnetization of the product is about 64.97emu / g. Figure 3 shows that the discharge current is 60A, and the discharge current density: 2.1A / mm 2 , The morphology of the synthesized product when the output voltage is 19V. The upper corner inset in the figure shows the electron diffraction pattern of the product, indicating that the product is Fe3 O 4 Nano particles. Example 3: Fe with an average...

Embodiment 3

[0034] Fe prepared 3 O 4 The nano particles are basically spherical, the particle size is basically distributed in the range of 15-35nm, and the average size is about 20nm. About 80% of the product is spherical Fe 3 O 4 Nano particles, and a small amount of nano carbon film. The saturation magnetization of the product is about 64.97emu / g. Figure 3 shows that the discharge current is 60A, and the discharge current density: 2.1A / mm 2 , The morphology of the synthesized product when the output voltage is 19V. The upper corner inset in the figure shows the electron diffraction pattern of the product, indicating that the product is Fe3 O 4 Nano particles. Example 3: Fe with an average size of about 30-40 nanometers 3 O 4 Synthesis of Nano Magnetic Particles:

[0035] Other experimental conditions are the same as in Example 1. The power supply parameters are set to: 80A, and the discharge current density: 2.8A / mm 2 , Output voltage: 21V.

[0036] Fe prepared 3 O 4 The nanoparticles are ...

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Abstract

This invention discloses a method for preparing nanometer particulates of Fe304. It is characterized by: arc discharging is used, with self-consumption of pure iron anode proceeded in water medium to produce nanometer particulates of Fe304. This inventive Fe304 magnetic nanometer particulates are of spherical with even size, having various kinds of excellent properties. The raw material of this invention is industrial pure iron rod, being of easily available, low cost, the advantages of this inventive method are: simple equipment, controllable process parameters, continuous and in large scale production.

Description

Technical field [0001] The invention belongs to the technical field of nano materials, and particularly relates to the preparation of nano metal oxide materials. Background technique [0002] Nanomaterials have a wide range of potential applications due to their unique small size effect, surface characteristics and a variety of excellent physical and chemical properties. Fe 3 O 4 Nanoparticle materials are low-cost nanomaterials with special semi-metallic ferromagnetic properties, high surface activity, non-toxicity and good biocompatibility. They are used in magnetic fluids, catalysts, high-density perpendicular magnetic recording, contrast agents, Targeted drugs, biotechnology, life sciences and technology have broad application prospects. At the same time, iron resources are abundant and the success or failure is low, making Fe 3 O 4 Nanoparticle materials have significant practical value. Therefore, Fe has been developed that can be batched, low-cost, and controllable with un...

Claims

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Application Information

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IPC IPC(8): C01G49/08
Inventor 姚可夫范肖凌
Owner TSINGHUA UNIV
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