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Magnetic ferrocobalt ferrite prepared by hard formwork method and preparation method thereof

A hard template method and ferrite technology are applied in the field of new cobalt ferrite and its preparation, and achieve the effects of low equipment requirements, simple process and good UV light degradation performance

Inactive Publication Date: 2011-07-13
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

After literature and patent inquiries, this method has not been reported

Method used

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  • Magnetic ferrocobalt ferrite prepared by hard formwork method and preparation method thereof
  • Magnetic ferrocobalt ferrite prepared by hard formwork method and preparation method thereof
  • Magnetic ferrocobalt ferrite prepared by hard formwork method and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] A. 3.9 grams of Co (NO 3 ) 2 ·6H 2 O, 4.6 g FeSO 4 ·7H 2 O and 2.6 g Fe 2 (SO 4 ) 3 Place in 50.0 ml of 1.0% high quality wood pulp and stir until the solid mixture is fully dissolved.

[0036] B. Prepare 1.5M NaOH and 1.0M Na with deoxygenated deionized water 2 CO 3 50.0 ml of mixed alkali solution, and under nitrogen protection and vigorous stirring, slowly add the alkali solution dropwise to the above salt solution until pH ≈ 10.5, then continue to stir for 6.0 hours, stand for 16.0 hours at room temperature for crystallization, filter , and washed three times with deionized water and absolute ethanol, respectively. The solid substance is vacuum dried to obtain a cobalt iron iron hydrotalcite / paper fiber adsorption assembly.

[0037] C. The adsorption assembly is placed in a muffle furnace, and the muffle furnace is heated to 1100 °C at a heating rate of 5.0 °C / min, and kept for 2 hours to obtain a cobalt ferrite microtube.

[0038] Crystal X-ray Diffracti...

Embodiment 2

[0041] A. Weigh 4.1 grams of Co (NO 3 ) 2 ·6H 2 O, 3.9 g FeSO 4 ·7H 2 O and 2.8 g Fe 2 (SO 4 ) 3 Place in 50.0 ml of 1.0% high quality wood pulp and stir until the solid mixture is fully dissolved. Separately prepare 2.5M NaOH and 1.8M Na with deoxygenated deionized water 2 CO 3 50.0 ml of mixed alkali solution of 50.0 ml, under nitrogen protection and vigorous stirring, slowly drop the mixed alkali solution into the above three-necked flask containing the salt solution until pH ≈ 10.5, and then continue to stir for 6.0 hours.

[0042] B. After stirring, the product was left to stand for crystallization for 16.0 hours at room temperature.

[0043] C. Filter the above mixture and wash with deionized water and absolute ethanol for 3 times successively.

[0044] D, vacuum drying solid matter, obtain Co 2+ Fe 2+ Fe 3+ -LDH / paper fiber adsorption assembly.

[0045] E. Place the adsorption assembly in a muffle furnace, heat the muffle furnace to 1100 °C at a heating ra...

Embodiment 3

[0048] A. Weigh 5.8 grams of Co (NO 3 ) 2 ·6H 2 O, 5.6 g FeSO 4 ·7H 2 O and 8.1 g Fe 2 (SO 4 ) 3 Place in 50.0 ml of 1.0% high quality wood pulp and stir until the solid mixture is fully dissolved. Separately prepare 2.5M NaOH and 2.0M Na with deoxygenated deionized water 2 CO 3 50.0 ml of mixed alkali solution of 50.0 ml, under nitrogen protection and vigorous stirring, slowly drop the mixed alkali solution into the above three-necked flask containing the salt solution until pH ≈ 10.5, and then continue to stir for 6.0 hours.

[0049] B. After stirring, the product was left to stand for crystallization for 16.0 hours at room temperature.

[0050] C. Filter the above mixture and wash with deionized water and absolute ethanol for 3 times successively.

[0051] D, vacuum drying solid matter, namely get Co 2+ Fe 2+ Fe 3+ -LDH / paper fiber adsorption assembly.

[0052] E. Place the adsorption assembly in the muffle furnace at 5.0. The muffle furnace was heated to 110...

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Abstract

The invention provides a magnetic cobalt iron ferrite prepared by a hard template method and a method for preparing the same. The adopted preparation method comprises the following steps: paper fibre or porous organism is used as a hard template; Co<2+>Fe<2+>Fe<3+>-LDH is synthesized in the surface and holes of the hard template and roasted to prepare the magnetic cobalt iron ferrite; as the function for fixing the houghite position is produced by the obstruction and adsorption of the hard template, the occurrence of the sintering phenomenon is greatly avoided, thereby preparing the magnetic cobalt iron ferrite with a consistent shape and even granularity. The method can be used to prepare the tubular or granular magnetic cobalt iron ferrite; the saturated magnetization intensity is 69-72Delta / emu.g<-1>, wherein the tubular magnetic cobalt iron ferrite has the tube diameter of between 0.3 and 1.0 micron, the tube length of between 0.8 and 1.5 micron and even distribution; and the granular magnetic cobalt iron ferrite has the grain diameter of between 50 and 80 nanometers and even distribution. The provided preparation method has the characteristics of simple operation, simple process, low requirement to equipment, high safety, etc.

Description

technical field [0001] The invention relates to a novel cobalt ferrite and a preparation method thereof, in particular to a cobalt ferrite with special shapes such as micron magnetic tubular and nanometer particles and a preparation method thereof. The prepared cobalt iron ferrite nanoparticles have good UV photodegradation performance for the organic dye methyl orange. Background technique [0002] Spinel type composite metal oxide AB 2 O 4 It is an important class of inorganic non-metallic materials with high melting point, high mechanical strength, low dielectric constant and excellent optical properties. AB 2 O 4 The successful preparation of particles further broadens the application prospects of such materials. [0003] Under normal circumstances, the preparation methods of spinel-type composite metal oxides mainly include the following: [0004] a. Chemical co-precipitation-calcination method. The method is a traditional preparation method, and the target produ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F1/10C04B35/26C04B35/64
Inventor 徐庆红纪雪梅马吉山
Owner BEIJING UNIV OF CHEM TECH
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