A kind of preparation method of starch raw material carbon-coated nickel-zinc-ferromagnetic nanoparticles

A technology of magnetic nanoparticles and carbon-coated nickel, which is applied in the direction of the magnetism of inorganic materials, can solve the problems of complex preparation process, high equipment requirements, and high price, and achieve cheap materials, strong chemical stability and magnetic properties, and easy operation Effect

Inactive Publication Date: 2016-02-24
NANCHANG HANGKONG UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main preparation methods include high-energy growth methods (arc, ion beam, laser, explosion) and chemical vapor deposition methods, carbon-based conversion methods, etc., with high energy consumption, high equipment requirements, complex preparation processes, and high prices.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] A kind of preparation method of starch raw material carbon coated nickel-zinc-ferromagnetic nanoparticles, comprising the following steps:

[0016] (1) Ni 0.6 Zn 0.4 Fe 2 o 4 Preparation of granules:

[0017] Take Ni(NO 3 ) 2 ·6H 2 O=0.03mol, Zn(NO 3 ) 2 ·6H 2 O=0.02mol, Fe(NO 3 ) 3 9H 2 Dissolve O=0.1mol in a three-necked flask filled with 100ml of deionized water, add 0.1mol of citric acid, adjust the pH to 7.0 with ammonia water, stir rapidly for 5 minutes, transfer to a 70°C water bath and oscillate with microwave until a brown-red transparent sol appears , and then transferred to a constant temperature drying oven at 80 ° C to dry, and after 72 hours to form a dry gel, drop 1ml of absolute ethanol onto the dry gel, place the dry gel in the air and ignite it, and self-propagating combustion occurs to form brown Ni 0.6 Zn 0.4 Fe 2 o 4 powder, finally divide the obtained powder into 3 parts, put them into the muffle furnace for calcination at 550°C for...

Embodiment 2

[0023] A kind of preparation method of starch raw material carbon coated nickel-zinc-ferromagnetic nanoparticles, comprising the following steps:

[0024] (1) Ni 0.6 Zn 0.4 Fe 2 o 4 Preparation of granules:

[0025] Take Ni(NO 3 ) 2 ·6H 2 O=0.03mol, Zn(NO 3 ) 2 ·6H 2 O=0.02mol, Fe(NO 3 ) 3 9H 2 Dissolve O=0.1mol in a three-necked flask filled with 100ml of deionized water, add 0.1mol of citric acid, adjust the pH to 7.0 with ammonia water, stir rapidly for 5 minutes, transfer to a 70°C water bath and oscillate with microwave until a brown-red transparent sol appears , and then transferred to a constant temperature drying oven at 80°C to dry, and after 72 hours to form a dry gel, drop 2ml of absolute ethanol onto the dry gel, place the dry gel in the air and ignite it, and self-propagating combustion occurs to form brown Ni 0.6 Zn 0.4 Fe 2 o 4 powder, and finally divide the obtained powder into 3 parts, put them into the muffle furnace for calcination at 600°C f...

Embodiment 3

[0031] A kind of preparation method of starch raw material carbon coated nickel-zinc-ferromagnetic nanoparticles, comprising the following steps:

[0032] (1) Ni 0.6 Zn 0.4 Fe 2 o 4 Preparation of granules:

[0033] Take Ni(NO 3 ) 2 ·6H 2 O=0.03mol, Zn(NO 3 ) 2 ·6H 2 O=0.02mol, Fe(NO 3 ) 3 9H 2 Dissolve O=0.1mol in a three-necked flask filled with 100ml of deionized water, add 0.1mol of citric acid, adjust the pH to 7.0 with ammonia water, stir rapidly for 5 minutes, transfer to a 70°C water bath and oscillate with microwave until a brown-red transparent sol appears , and then transferred to a constant temperature drying oven at 80°C to dry, and after 72 hours to form a dry gel, drop 3ml of absolute ethanol onto the dry gel, place the dry gel in the air and ignite it, and self-propagating combustion occurs to form brown Ni 0.6 Zn 0.4 Fe 2 o 4 powder, and finally divide the obtained powder into 3 parts, put them into the muffle furnace for calcination at 650°C f...

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Abstract

The invention discloses a method for preparing starch raw material carbon-coated nickel-zinc-ferromagnetic nanoparticles. 3.9H2O as raw material, Ni0.6Zn0.4Fe2O4 magnetic nanoparticles were prepared by self-propagating combustion method, Ni0.6Zn0.4Fe2O4 magnetic nanoparticles were coated with starch in situ, and then high-temperature hydrogen reduced starch to coat nickel-zinc ferrite. A carbon-coated nickel-zinc ferromagnetic nanomaterial is obtained. The magnetic nanomaterial has high saturation magnetization, low coercive force and residual magnetization, and is suitable for further modification to prepare magnetic resonance imaging contrast agents, biological analysis and drug carriers, hyperthermia media, catalysts, magnetic recording and magnetic fields. Materials such as separation media have important scientific significance and good application value.

Description

technical field [0001] The invention relates to a method for preparing starch raw material carbon-coated nickel-zinc-ferromagnetic nanoparticles, which belongs to the field of material preparation. Background technique [0002] Carbon-coated nickel-zinc-ferromagnetic nanoparticles have unique physical and chemical properties, and have shown great potential application prospects in many fields such as biomedicine, chemical industry, and new energy, such as magnetic resonance imaging contrast agents, biological analysis and drug carriers, Hyperthermia media, catalysts, magnetic recording and magnetic separation media, etc. As a new type of carbon-composite nanomaterials, the preparation, properties and application of carbon-coated metal nanoparticles have become widely concerned. Various methods have been used to synthesize nano-carbon coating materials of different metal particles. At present, the main preparation methods include high-energy growth method (arc, ion beam, la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/33B22F9/22B22F1/02
Inventor 谢宇刘福明乐长高唐星华汪月华潘建飞胡冬生
Owner NANCHANG HANGKONG UNIVERSITY
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