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A cactus-shaped magnetic fe 3 o 4 /fe 2 o 3 Nano-heterogeneous material and its preparation method

A heterogeneous and nanotechnology, which is applied in the field of prickly pear-shaped magnetic Fe3O4/Fe2O3 nano-heterogeneous material and its preparation, can solve the problems of complex preparation process, high operation control requirements, and high preparation cost, and achieve simple and easy control of the process, The effect of low equipment requirements and high product yield

Active Publication Date: 2018-01-16
江阴智产汇知识产权运营有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Such as literature (J.Magn. Magn. Mater., 2004, 272-276: 1776-1777) put 2 o 3 Reduction at 350°C for 0.5-6 h in an atmosphere of 95% argon and 5% hydrogen, followed by calcination at 1100°C for 3 h under the protection of helium to prepare magnetic Fe 3 o 4 / Fe 2 o 3 Heterogeneous nanoparticles, the preparation process is complicated, the process control is difficult, and the use of hydrogen reduction requires high operation control requirements and high equipment requirements to ensure that the gas will not leak, and if it is not operated properly, it will bring safety. hidden danger; at the same time, the use of rare gas protection pollutes the environment, and the preparation cost is high; it can also be found that this traditional preparation method is to first prepare Fe 2 o 3 The nanoparticles were then subjected to hydrogen reduction in a two-step process to prepare magnetic Fe 3 o 4 / Fe 2 o 3 Nano-heterogeneous materials, the process is complicated and uneconomical, and the safety is low

Method used

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  • A cactus-shaped magnetic fe <sub>3</sub> o <sub>4</sub> /fe <sub>2</sub> o <sub>3</sub> Nano-heterogeneous material and its preparation method
  • A cactus-shaped magnetic fe <sub>3</sub> o <sub>4</sub> /fe <sub>2</sub> o <sub>3</sub> Nano-heterogeneous material and its preparation method
  • A cactus-shaped magnetic fe <sub>3</sub> o <sub>4</sub> /fe <sub>2</sub> o <sub>3</sub> Nano-heterogeneous material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Example 1: Prickly Pear Magnetic Fe 3 o 4 / Fe 2 o 3 Preparation of nanoheterogeneous materials

[0020] Add 20 mL of diethyl carbonate and 10.12 g of ferric nitrate nonahydrate to 20 mL of absolute ethanol, stir and dissolve for 2 hours to obtain a homogeneous solution, place the solution in a crucible, ignite and burn in the air, and wait until the heat is exhausted to obtain a gel , put the gel in a temperature-programmed furnace, raise the temperature to 300°C at a rate of 3°C / min, keep it for calcination at 300°C for 2 h, cool it down to room temperature naturally, take it out, and grind it into a prickly pear-shaped magnetic Fe 3 o 4 / Fe 2 o 3 Nanomaterials. Prepared prickly pear-shaped magnetic Fe 3 o 4 / Fe 2 o 3 The nano-heterogeneous material has a saturation magnetization as high as 31.5 emu / g and a diameter of about 400-600 nm.

[0021] figure 1 The prickly pear-shaped magnetic Fe prepared for the present embodiment 3 o 4 / Fe 2 o 3 Transmissio...

Embodiment 2

[0024] Example 2: Prickly Pear Magnetic Fe 3 o 4 / Fe 2 o 3 Preparation of nanoheterogeneous materials

[0025] Add 20 mL of diethyl carbonate and 10.12 g of ferric nitrate nonahydrate to 20 mL of absolute ethanol, stir and dissolve for 2 hours to obtain a homogeneous solution, place the solution in a crucible, ignite and burn in the air, and wait until the heat is exhausted to obtain a gel , put the gel in a temperature-programmed furnace, raise the temperature to 150°C at a heating rate of 20°C / min, keep it calcined at 150°C for 2 h, cool it down to room temperature naturally, take it out, and grind it to obtain a cactus-shaped magnetic Fe 3 o 4 / Fe 2 o 3 Nanomaterials. Prepared prickly pear-shaped magnetic Fe 3 o 4 / Fe 2 o 3 The nano-heterogeneous material has a saturation magnetization of 32.4 emu / g and a diameter of about 200-300 nm.

Embodiment 3

[0026] Example 3: Prickly Pear Magnetic Fe 3 o 4 / Fe 2 o 3 Preparation of nanoheterogeneous materials

[0027] Add 20 mL of diethyl carbonate and 10.12 g of ferric nitrate nonahydrate to 20 mL of absolute ethanol, stir and dissolve for 2 hours to obtain a homogeneous solution, place the solution in a crucible, ignite and burn in the air, and wait until the heat is exhausted to obtain a gel , put the gel in a temperature-programmed furnace, raise the temperature to 450°C at a rate of 0.1°C / min, keep it calcined at 450°C for 6 h, cool it down to room temperature naturally, take it out, and grind it to obtain a cactus-shaped magnetic Fe 3 o 4 / Fe 2 o 3 Nanomaterials. Prepared prickly pear-shaped magnetic Fe 3 o 4 / Fe 2 o 3 The nano-heterogeneous material has a saturation magnetization of 1.2 emu / g and a diameter of about 500-600 nm.

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Abstract

The invention belongs to the technical field of preparation of inorganic nonmetal magnetic nanocomposites, and particularly relates to a ball-cactus-shaped magnetic Fe3O4 / Fe2O3 nanometer heteroplasmon material and a preparation method thereof. The method includes the steps that ferric nitrate, diethyl carbonate and absolute ethyl alcohol serve as raw materials and are mixed and stirred for dissolution, and a uniform solution is obtained; the solution is ignited to burn in air, and gel is obtained; the gel is put into a programmed temperature control furnace, subjected to heating and heat preservation roasting and then naturally cooled to the room temperature, and the ball-cactus-shaped magnetic Fe3O4 / Fe2O3 nanometer heteroplasmon material can be obtained. According to the method, the ball-cactus-shaped magnetic Fe3O4 / Fe2O3 nanometer heteroplasmon material is prepared through the simple method of solution burning and roasting, and the process is simple and easy to control; besides, the requirement for equipment is low, the product is uniform in structure and morphology, and the intensity of magnetism is easy to control.

Description

technical field [0001] The invention relates to a cactus-shaped magnetic Fe 3 o 4 / Fe 2 o 3 The nano-heterogeneous body material and its preparation method belong to the technical field of preparation of inorganic non-metallic nano-composite materials. Background technique [0002] As people gradually in-depth research on material science, the desire and demand for new materials are gradually deepening. At present, the vast majority of magnetic nanomaterials contain heavy metals. Due to factors such as the biological toxicity of heavy metals and post-processing restrictions, the application of magnetic nanomaterials in various fields is greatly limited, especially the application of magnetic nanomaterials in the field of biomedicine. Therefore, a lot of research has focused on magnetic iron oxide nanomaterials. A large number of studies have shown that the magnetic Fe 2 o 3 The magnetism of nanomaterials is relatively weak, so in the application process, it is often i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G49/08
CPCC01G49/0018C01P2004/62C01P2004/82C01P2006/42
Inventor 刘瑞江陈健吴晓阳陆益民于宗良邓志勇
Owner 江阴智产汇知识产权运营有限公司
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