A kind of three-dimensional network coral-like zinc ferrite powder and its preparation method

A three-dimensional network and zinc ferrite technology, applied in the field of material science, can solve the problems of low specific surface area and irregular zinc ferrite morphology, and achieve the effect of high purity, uniform morphology and increased specific surface area

Active Publication Date: 2018-07-27
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] At present, zinc ferrite is generally prepared by hydrothermal method, sol-gel method and solid-phase method, but the morphology of zinc ferrite prepared by hydrothermal method is generally irregular; while the zinc ferrite prepared by sol-gel method and solid-phase method are relatively aggregated and have a lower specific surface area

Method used

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  • A kind of three-dimensional network coral-like zinc ferrite powder and its preparation method
  • A kind of three-dimensional network coral-like zinc ferrite powder and its preparation method
  • A kind of three-dimensional network coral-like zinc ferrite powder and its preparation method

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preparation example Construction

[0037] The preparation method of the present invention comprises the following steps:

[0038] (1) Zn(NO 3 ) 3 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O is weighed according to the molar ratio of 5mmol:10mmol, added to 50-70mL ultrapure water to prepare a solution, and fully magnetically stirred for 30-60 minutes to obtain orange-yellow solution A;

[0039] (2) Slowly add 80-120 mmol of granular NaOH to solution A and stir evenly to precipitate Zn 2+ and Fe 3+ , the stirring time is 30 to 60 minutes to obtain a uniform reddish-brown suspension B;

[0040] (3) Transfer the suspension B to the polytetrafluoroethylene lining, put it into a stainless steel high-pressure reactor, and heat it in a homogeneous reactor for hydrothermal reaction. The temperature of the hydrothermal reaction is 180-200 ° C, and the reaction time is 12 to 24 hours;

[0041] (4) After the reactor is cooled to room temperature, the hydrothermal product obtained after the reaction is a brown-red powder, which is...

Embodiment 1

[0051] A three-dimensional network coral-like ZnFe 2 o 4 and preparation method thereof, comprising the following steps:

[0052] (1) Zn(NO 3 ) 3 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O is weighed according to a molar ratio of 1:2, added to 60mL ultrapure water to prepare a solution, and magnetically stirred for 30min to obtain an orange-yellow solution A;

[0053] (2) Slowly add 80mmol NaOH to solution A and stir evenly for 30min to obtain a reddish-brown suspension B;

[0054] (3) Transfer the suspension B to a polytetrafluoroethylene lining, put it into a stainless steel autoclave, and heat it in a homogeneous reactor to carry out a hydrothermal reaction. The reaction temperature is 180° C., and the reaction time is 18 hours;

[0055] (4) After the reaction kettle was cooled to room temperature, the product obtained after the reaction was washed with deionized water and absolute ethanol and then dried in an oven at 70° C. for 4 hours to obtain nano-zinc ferrite precursor powder...

Embodiment 2

[0064] A three-dimensional network coral-like ZnFe 2 o 4 and preparation method thereof, comprising the following steps:

[0065] (1) Zn(NO 3 ) 3 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O is weighed according to a molar ratio of 1:2, is added to 50mL ultrapure water to prepare a solution, and magnetically stirred for 40min to obtain an orange-yellow solution A;

[0066] (2) Slowly add 90mmol NaOH to solution A and stir evenly for 40min to obtain a reddish-brown suspension B;

[0067] (3) Transfer the suspension B to the polytetrafluoroethylene lining, put it into a stainless steel autoclave, and heat it in a homogeneous reactor for hydrothermal reaction. The reaction temperature is 180 ° C, and the reaction time is 12 hours;

[0068] (4) After the reaction kettle was cooled to room temperature, the product obtained after the reaction was washed with deionized water and absolute ethanol, and then dried in an oven at 60° C. for 6 hours to obtain nano-zinc ferrite precursor powder prep...

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Abstract

The invention discloses three-dimensional network coralloid zinc ferrite powder and a preparation method thereof. The preparation method comprises the steps of using Zn(NO3)3 6H2O and Fe(NO3)3 9H2O as raw materials, preparing a nanometer zinc ferrite precursor through a hydrothermal method, processing the precursor through a molten salt method to obtain octahedral-shaped zinc ferrite and finally using N,N-dimethyl formamide as a solvent, hydrazine hydrate as a reducing agent and methyl thioglycolate as a complexing agent to obtain three-dimensional network coralloid zinc ferrite through a one-step etching method. The preparation method disclosed by the invention has a preparation technology simple to operate and a short period; the diameter of the prepared coralloid zinc ferrite is about 75 to 90nm, the prepared coralloid zinc ferrite has even size, and the specific surface area of the coralloid zinc ferrite is certainly improved.

Description

【Technical field】 [0001] The invention belongs to the field of material science, and in particular relates to a three-dimensional network coral-like zinc ferrite powder and a preparation method thereof. 【Background technique】 [0002] Zinc ferrite (ZnFe 2 o 4 ) belongs to the spinel structure of the cubic crystal system, and is an important narrow-bandgap semiconductor material with a bandgap width of 1.9eV. Due to its unique magnetic, optical and electrical properties, ZnFe 2 o 4 Widely used as magnetic materials, gas-sensitive materials, photocatalytic materials, adsorption materials and lithium-ion battery materials. [0003] Zinc ferrite is an important soft ferrite material, and nano-zinc ferrite particles have broad application prospects in the fields of magnetic fluid, storage, and targeted drug delivery. The bulk zinc ferrite material exhibits ferromagnetism, but when the size of zinc ferrite reaches the nanoscale, its crystal structure changes, which leads to a...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C01G49/00B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01G49/0081C01P2002/72C01P2004/03C01P2004/30C01P2004/64C01P2006/12
Inventor杨海波张佳豪林营闫非高淑雅
OwnerSHAANXI UNIV OF SCI & TECH